@extends("layouts.layoutapp")

@section("content")
    <div class="row">
        <div class="col-12">
            <div class="card me-2">
                <div class="card-header pb-0">
                    <div class="d-flex justify-content-between flex-row">
                        <div>
                            <h5 class="mb-0">Add New Invoice</h5>
                        </div>                     
                    </div>
                </div>

                <div class="card-body">
                    <form action="{{ route("invoice-store") }}" method="POST" id="invoiceForm">
                        @csrf
                        <div class="row">
                            <div class="col-lg-3 mb-3">
                                <label for="client_name" class="form-label">
                                    Client Name:
                                </label>
                                <input type="text" name="client_name" id="client_name" class="form-control"
                                    value="{{ old("client_name") }}" />
                                <span class="text-danger d-block mt-1" id="client_name_error"></span>
                                @error("client_name")
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                            <div class="col-lg-3 mb-3">
                                <label for="client_num" class="form-label">
                                    Client Number:
                                </label>
                                <select name="client_num" id="client_num_select" class="select2 form-select" multiple>
                                    @foreach ($clients as $client)
                                        <option value="{{ $client->user->phone }}" data-clientID="{{ $client->id }}" {{ in_array($client->user->phone, (array) old("client_num", [])) ? "selected" : "" }}>
                                            {{ $client->user->phone }}
                                        </option>
                                    @endforeach
                                </select>
                                <div id="client_num_error" class="text-danger small" style="display: none"></div>
                                @error("client_num")
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                            <div class="col-lg-3 mb-3">
                                <label for="invoice_id" class="form-label">
                                    Invoice number:
                                </label>
                                <input type="text" id="invoice_id" class="form-control" value="" readonly />
                            </div>
                            <div class="col-lg-3 mb-3">
                                <label for="invoice_date" class="form-label">
                                    Invoice Date:
                                </label>
                                <input type="date" id="invoice_date" class="form-control" name="invoice_date"
                                    value="{{ old("invoice_date", \Carbon\Carbon::now()->format("Y-m-d")) }}" required />
                                @error("invoice_date")
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                            <div class="col-lg-3 mb-3">
                                <label for="due_date" class="form-label">
                                    Due Date:
                                </label>
                                <input type="date" id="due_date" class="form-control" name="due_date"
                                    value="{{ old("due_date", \Carbon\Carbon::now()->format("Y-m-d")) }}" required />
                                @error("due_date")
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                            @if ($branch->non_gst == "A")
                                <div class="col-lg-3 mb-3">
                                    <label for="gst" class="form-label">
                                        GST/Non-GST:
                                    </label>
                                    <select name="gst" id="gst" class="form-select" onchange="toggleTaxes()">
                                        <option value="">Select</option>
                                        <option value="Y" {{ old("gst") == "Y" ? "selected" : "" }}>
                                            GST
                                        </option>
                                        <option value="N" {{ old("gst") == "N" ? "selected" : "" }}selected>
                                            Non-GST
                                        </option>
                                    </select>
                                    @error("gst")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>
                            @else
                                <div class="col-lg-3 mb-3">
                                    <label for="gst" class="form-label">
                                        GST/Non-GST:
                                    </label>
                                    <select name="gst" id="gst" class="form-select" onchange="toggleTaxes()">
                                        <option value="">Select</option>
                                        <option value="Y" {{ old("gst") == "Y" ? "selected" : "" }} selected>
                                            GST
                                        </option>
                                        <option value="N" {{ old("gst") == "N" ? "selected" : "" }}>
                                            Non-GST
                                        </option>
                                    </select>
                                    @error("gst")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>
                            @endif
                        </div>
                        <hr />
                        <div>
                            <h5>Product Details:</h5>
                            <div class="row align-items-center">
                                <div class="col-lg-4 d-flex align-items-center mb-3">
                                    <i class="fa-solid fa-qrcode" style="width: 30px; height: 30px; margin-right: 10px"></i>
                                    <input class="form-control" type="text" id="product-code-input"
                                        onkeydown="preventFormSubmit(event)" />
                                </div>
                                <div class="col-lg-4">
                                    <button type="button" onclick="addRow(event)" class="btn btn-primary addRow">
                                        <i class="fas fa-plus"></i>
                                        Add Row
                                    </button>
                                </div>
                            </div>

                            <div class="table-responsive">
                                <table class="table-bordered table-striped table text-sm" id="productsTable">
                                    <thead class="thead-dark">
                                        <tr>
                                            {{-- <th>#</th> --}}
                                            <th>Product</th>
                                            <th>Avl. Qty</th>
                                            <th>Qty</th>
                                            <th>Unit Price</th>
                                            <th>Tax</th>
                                            <th>Amount</th>
                                            <th class="w-0 text-center align-middle"></th>
                                        </tr>
                                    </thead>
                                    <tbody id="productRows">
                                        <!-- Dynamic rows will be added here -->
                                    </tbody>
                                </table>
                            </div>
                        </div>
                        <div class="row mt-5">
                            <div class="col-lg-6 d-flex mb-3">
                                <div class="col-lg-6">
                                    <label for="discount_type" class="form-label">
                                        Discount type:
                                    </label>
                                    <select name="discount_type" id="discount_type" class="form-select"
                                        onchange="calculateTotal()">
                                        <option value="">Select discount type</option>
                                        @foreach ($discount_types as $type)
                                            <option value="{{ $type->id }}" {{ old("discount_type") == $type->id ? "selected" : "" }}>
                                                {{ $type->type }}
                                            </option>
                                        @endforeach
                                    </select>
                                    @error("discount_type")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>

                                <div class="col-lg-6">
                                    <label for="discount" class="form-label">
                                        Discount:
                                    </label>
                                    <input type="number" id="discount" name="discount" class="form-control ms-2"
                                        value="{{ old("discount") }}" oninput="calculateTotal()" {{ empty(old("discount_type")) ? "readonly" : "" }} />
                                    @error("discount")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>
                            </div>
                            <div class="col-lg-5 mb-3">
                                <div class="card shadow-lg">
                                    <div class="card-body">
                                        <div class="d-flex justify-content-between pl-5">
                                            <span>Sub Total:</span>
                                            <span id="subTotalDisplay">0 ₹</span>
                                        </div>
                                        <div class="d-flex justify-content-between pl-5">
                                            <span>Discount:</span>
                                            <span id="discountDisplay">0 ₹</span>
                                        </div>
                                        <div class="d-flex justify-content-between pl-5">
                                            <span>Tax:</span>
                                            <span id="taxDisplay">0 ₹</span>
                                        </div>
                                        <div class="d-flex justify-content-between pl-5">
                                            <span>Total:</span>
                                            <span id="totalDisplay">0 ₹</span>
                                        </div>
                                        <input type="hidden" id="sub_total" name="sub_total" value="0" />
                                        <input type="hidden" id="discount_amt" name="discount_amt" value="0" />
                                        <input type="hidden" id="tax" name="tax" value="0" />
                                        <input type="hidden" id="total_amt" name="total_amt" value="0" />
                                    </div>
                                </div>
                            </div>
                        </div>

                        <hr />
                        <div>
                            <div class="d-flex justify-content-between align-items-center mb-3 flex-wrap">
                                <div class="d-flex align-items-center flex-wrap gap-3">
                                    <!-- Label -->
                                    <h5 class="mb-0">Payment Details:</h5>

                                    <!-- Tendered Amount Input -->
                                    <input type="number" step="0.01" name="tendered_amount" id="tendered_amount"
                                        class="form-control w-auto" style="min-width: 200px"
                                        value="{{ old("tendered_amount") }}" placeholder="Enter tendered amount" />
                                    @error("tendered_amount")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>

                                <!-- Extra Amount Badge (Right Side) -->
                                <span class="badge bg-primary extra_amount">Extra Amount: ₹ 0.00</span>
                            </div>

                            <div class="row g-3">
                                <!-- UPI -->
                                <div class="col-md-4">
                                    <label for="upi" class="form-label">
                                        UPI:
                                    </label>
                                    <input type="text" name="upi" id="upi" class="form-control" value="{{ old("upi") }}" />
                                    @error("upi")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>

                                <!-- Cash -->
                                <div class="col-md-4">
                                    <label for="cash" class="form-label">
                                        Cash:
                                    </label>
                                    <input type="text" name="cash" id="cash" class="form-control"
                                        value="{{ old("cash") }}" />
                                    @error("cash")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>

                                <!-- Online -->
                                <div class="col-md-4">
                                    <label for="online" class="form-label">
                                        Online:
                                    </label>
                                    <input type="text" name="online" id="online" class="form-control"
                                        value="{{ old("online") }}" />
                                    @error("online")
                                        <span class="text-danger">{{ $message }}</span>
                                    @enderror
                                </div>

                                <!-- Payment total errors -->
                                @if ($errors->has("payment_total"))
                                    <div class="col-12 text-danger">
                                        {{ $errors->first("payment_total") }}
                                    </div>
                                @endif

                                <div class="mt-3 d-flex justify-content-between">
                                    <div class="d-flex flex-wrap gap-4">
                                        <div class="d-flex align-items-center">
                                            <span class="fw-bold me-2">Previous Due:</span>
                                            <span id="due_amount" class="fw-bold due_amount">
                                                ₹ 0.00
                                            </span>
                                        </div>
                                        +
                                        <div class="d-flex align-items-center">
                                            <span class="fw-bold me-2">Current Balance:</span>
                                            <span id="invoiceBalance" class="fw-bold">
                                                ₹ 0.00
                                            </span>
                                        </div>
                                        =
                                        <div class="d-flex align-items-center">
                                            <span class="fw-bold me-2">Total Balance:</span>
                                            <span id="totalBalance" class="fw-bold">
                                                ₹ 0.00
                                            </span>
                                        </div>
                                    </div>
                                    <div class="d-flex justify-content-end align-items-center">
                                        <span class="fw-bold me-3">Total Qty:</span>
                                        <span id="totalQuantity" class="badge bg-primary">
                                            0
                                        </span>
                                    </div>
                                </div>
                            </div>

                            @if ($branch->loyalty_config == "A")
                                <!-- Loyalty Points Section -->
                                <div class="col-lg-12 d-flex justify-content-between mt-3">
                                    <div class="col-md-3 redeem_points current_point mb-3 me-3" style="display: none">
                                        <label for="redeem_points" class="form-label">
                                            Redeem Points:
                                        </label>
                                        <input type="number" name="redeem_points" id="redeem_points" class="form-control"
                                            value="{{ old("redeem_points") }}" />
                                        @error("redeem_points")
                                            <span class="text-danger">{{ $message }}</span>
                                        @enderror
                                    </div>

                                    <div class="card h-100 col-md-3 redeem_points shadow-lg" style="display: none">
                                        <div class="card-body d-flex flex-column justify-content-center">
                                            <div class="d-flex justify-content-between mb-2">
                                                <span>Earned Points:</span>
                                                <span id="earnPoints">
                                                    0
                                                    <i class="fa-solid fa-coins text-warning"></i>
                                                </span>
                                            </div>
                                            <div class="d-flex justify-content-between mb-2">
                                                <span>Redeemed Points:</span>
                                                <span id="redeemPoints">
                                                    0
                                                    <i class="fa-solid fa-coins text-warning"></i>
                                                </span>
                                            </div>
                                            <div class="d-flex justify-content-between">
                                                <span>Available Points:</span>
                                                <span id="availablePoints">
                                                    0
                                                    <i class="fa-solid fa-coins text-warning"></i>
                                                </span>
                                            </div>
                                        </div>
                                    </div>

                                    <input type="hidden" id="earn_point" name="earn_point" value="0" />
                                    <input type="hidden" id="redeem_point" name="redeem_point" value="0" />
                                    <input type="hidden" id="available_point" name="available_point" value="0" />
                                </div>
                            @endif
                        </div>

                        <hr>
                        <div>
                            @php
                                $showNote = $branch->note_flag === "A";
                                $showTerm = $branch->terms_flag === "A";
                                $buttonLabel = "Add ";
                                if ($showNote && $showTerm) {
                                    $buttonLabel .= "Note & Term";
                                } elseif ($showNote) {
                                    $buttonLabel .= "Note";
                                } elseif ($showTerm) {
                                    $buttonLabel .= "Terms";
                                }
                            @endphp

                            @if ($showNote || $showTerm)
                                <button type="button" onclick="toggleNotesAndTerms('{{ $buttonLabel }}')"
                                    class="btn btn-primary" id="notesTermsBtn">
                                    <i class="fas fa-plus"></i>
                                    {{ $buttonLabel }}
                                </button>
                            @endif

                            <div class="row mt-3" id="notesTermsSection" style="display: none">
                                @if ($showNote)
                                                                <div class="col-lg-6">
                                                                    <label for="note" class="form-label">
                                                                        Note:
                                                                    </label>
                                                                    <textarea class="form-control" data-label="Note" name="note" id="note">
                                    {{ old("note") }}</textarea>
                                                                </div>
                                @endif

                                @if ($showTerm)
                                                                <div class="col-lg-6">
                                                                    <label for="term" class="form-label">
                                                                        Term:
                                                                    </label>
                                                                    <textarea class="form-control" data-label="Term" name="term" id="term">
                                    {{ old("term") }}</textarea>
                                                                </div>
                                @endif
                            </div>
                        </div>

                        <div class="modal-footer d-flex justify-content-end">                          
                            <div>
                                <button type="submit" id="submit" class="btn btn-primary">
                                    Save
                                </button>
                                <a href="{{ route("invoice-index") }}" class="btn btn-secondary">
                                    Cancel
                                </a>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
@endsection

@push("scripts")
    <script>
        // Product data from backend
        const products = @json($products);
        const taxes = @json($all_taxes);
        const defaultTaxIds = @json($default_taxes);
        const pointValue = @json($point_value);
        const isDescription = @json($branch->inv_desc_flag);
        const isLoyalty = @json($branch->loyalty_config);
        const isAvl = @json($branch->avl_qty_flag);
        const isNavite = @json($branch->native_name_flag);

        let avlPoint = 0;
        let redeemPoints = 0;
        let total = 0;
        let rowCount = 0;
        let hasQuantityError = false;
        let previousDue = 0;

        function preventFormSubmit(event) {
            if (event.key === 'Enter') {
                event.preventDefault();
                addProductRow();
                setTimeout(() => {
                    document.getElementById('product-code-input').focus();
                }, 1000);
            }
        }

        function addRow(event) {
            event.preventDefault();
            addProductRow();
            setTimeout(() => {
                document.getElementById('product-code-input').focus();
            }, 1000);
        }

        function addProductRow() {
            const productCode = document.getElementById('product-code-input').value;
            if (!productCode) {
                addEmptyRow();
                return;
            }

            const product = products.find((p) => p.code === productCode);
            if (product) {
                const existingRow = findProductRow(product.id);

                if (existingRow) {
                    const qtyInput = existingRow.querySelector('.qty');
                    const currentQty = parseFloat(qtyInput.value) || 0;
                    qtyInput.value = currentQty + 1;
                    calculateRowAmount(existingRow.id.split('-')[1]);
                    checkQuantity(existingRow.id.split('-')[1]);
                } else {
                    addProductToTable(product);
                }

                document.getElementById('product-code-input').value = '';
            } else {
                alert('Product not found!');
            }
        }

        function findProductRow(productId) {
            const rows = document.querySelectorAll('#productRows tr');
            for (const row of rows) {
                const select = row.querySelector('.product-select');
                if (select && select.value == productId) {
                    return row;
                }
            }
            return null;
        }

        function addEmptyRow() {
            rowCount++;
            const row = `
            <tr id="row-${rowCount}">
            {{-- <td>${rowCount}</td> --}}
            <td>
            <div class="d-flex flex-column">
                <select name="dynamicFields[${rowCount}][product]" class="form-select product-select mb-2"
                    onchange="updateProductDetails(${rowCount})">
                    <option value="">Select Product</option>
                    ${products
                    .map((p) => {
                        const name =
                            p.branch
                                .native_name_flag ==
                                'A'
                                ? p.native_name ??
                                p.name
                                : p.name;
                        return `<option value="${p.id}">${p.code} - ${name}</option>`;
                    })
                    .join('')}
                    </select>
                ${isDescription === 'A'
                    ? `
                    <input type="text" name="dynamicFields[${rowCount}][description]"
                        style="padding-left:10px !important;" class="form-control mt-1"
                        id="description-${rowCount}" placeholder="Enter a Description">
                `
                    : ''
                }
                </div>
                    </td>
                    <td style="width:120px;">
                    <input type="text" name="dynamicFields[${rowCount}][avl_qty]" class="form-control avl-qty" readonly />
                    </td>
                    <td style="width:120px;">
                    <input type="number" name="dynamicFields[${rowCount}][qty]" class="form-control qty"
                    onchange="calculateRowAmount(${rowCount})"
                    oninput="checkQuantity(${rowCount})" />
                    <div class="invalid-feedback quantity-error" style="display: none;">
                    Quantity exceeds available stock!
                    </div>
                    </td>
                    <td style="width:120px;">
                    <input type="text" name="dynamicFields[${rowCount}][unit_price]" class="form-control unit-price"
                    onchange="calculateRowAmount(${rowCount})" />
                    <input type="hidden" class="margin-price" value="0">
                    </td>
                    <td style="min-width: 150px;">
                    <select name="dynamicFields[${rowCount}][tax][]" class="form-select tax-select" multiple
                    style="height: 50px;"
                    onchange="calculateRowAmount(${rowCount})">
                    ${taxes
                    .map((t) => {
                        const taxId = t.id; // No need to convert to string if IDs are numbers
                        const isDefault =
                            defaultTaxIds.includes(
                                taxId,
                            );

                        return `<option value="${t.id}" ${isDefault ? 'selected' : ''}>${t.name} - ${t.value}%</option>`;
                    })
                    .join('')}
                    </select>
                    </td>
                    <td style="width:150px;">
                    <input type="text" name="dynamicFields[${rowCount}][amount]" class="form-control amount" />
                    </td>
                    <td class="text-center align-middle">
                    <a href="javascript:void(0);" onclick="removeRow(${rowCount})" class="text-danger fs-5" title="Remove Row">
                        <i class="fas fa-trash"></i>
                    </a>
                </td>

                </tr>
                                                                                    `;
            document.getElementById('productRows').insertAdjacentHTML('beforeend', row);
            $(`#row-${rowCount} .product-select`).select2({
                placeholder: 'Select Product',
                width: '100%',
            });

            // If GST is selected, enable taxes, otherwise disable
            const gstValue = document.getElementById('gst').value;
            if (gstValue === 'N') {
                const taxSelect = document.querySelector(`#row-${rowCount} .tax-select`);
                taxSelect.innerHTML = '<option value="no-tax" selected>No Tax</option>';
                taxSelect.disabled = true;
            }
        }

        function addProductToTable(product) {
            rowCount++;
            const row = `
                <tr id="row-${rowCount}">
                    {{-- <td>${rowCount}</td> --}}
                <td>
                    <div class="d-flex flex-column">
                <select name="dynamicFields[${rowCount}][product]" class="form-select product-select"
                onchange="updateProductDetails(${rowCount})">
                <option value="">Select Product</option>
                ${products.map((p) => `<option value="${p.id}" ${p.id == product.id ? 'selected' : ''}>${p.code} - ${p.branch.native_name_flag == 'A' ? p.native_name ?? p.name : p.name}</option>`).join('')}
                </select>
                    ${isDescription === 'A'
? `
                    <input type="text" name="dynamicFields[${rowCount}][description]"
                        style="padding-left:10px !important;" class="form-control mt-1"
                        id="description-${rowCount}" placeholder="Enter a Description">
                `
: ''
}
                </div>
                    </td>
                    <td style="width:120px;">
                    <input type="text" name="dynamicFields[${rowCount}][avl_qty]" class="form-control avl-qty"
                    value="${product.qty}" readonly />
                    </td>
                    <td style="width:120px;">
                    <input type="number" name="dynamicFields[${rowCount}][qty]" class="form-control qty"
                    value="1" onchange="calculateRowAmount(${rowCount})"
                    oninput="checkQuantity(${rowCount})" />
                    <div class="invalid-feedback quantity-error" style="display: none;">
                    Quantity exceeds available stock!
                    </div>
                    </td>
                    <td style="width:120px;">
                    <input type="text" name="dynamicFields[${rowCount}][unit_price]" class="form-control unit-price"
                    value="${product.unit_price}" onchange="calculateRowAmount(${rowCount})" />
                    <input type="hidden" class="margin-price" value="${product.margin_price ?? 0}">
                    </td>
                    <td style="min-width: 150px;">
                    <select name="dynamicFields[${rowCount}][tax][]" class="form-select tax-select" multiple
                    style="height: 50px;"
                    onchange="calculateRowAmount(${rowCount})">
                    ${taxes
                    .map((t) => {
                        const isDefault =
                            defaultTaxIds.includes(
                                t.id,
                            );
                        const isProductTax =
                            product.taxes
                                ? product.taxes.includes(
                                    t.id,
                                )
                                : false;
                        const shouldSelect =
                            isDefault ||
                            isProductTax;
                        return `<option value="${t.id}" ${shouldSelect ? 'selected' : ''}>${t.name} - ${t.value}%</option>`;
                    })
                    .join('')}
                    </select>
                    </td>
                    <td style="width:150px;">
                    <input type="text" name="dynamicFields[${rowCount}][amount]" class="form-control amount"
                    value="${product.unit_price}"  />
                    </td>
                    <td class="text-center align-middle">
                    <a href="javascript:void(0);" onclick="removeRow(${rowCount})" class="text-danger fs-5" title="Remove Row">
                        <i class="fas fa-trash"></i>
                    </a>
                </td>

                </tr>
                `;
            document.getElementById('productRows').insertAdjacentHTML('beforeend', row);
            $(`#row-${rowCount} .product-select`).select2({
                placeholder: 'Select Product',
                width: '100%',
            });

            calculateRowAmount(rowCount);
            checkQuantity(rowCount);

            // If GST is selected, enable taxes, otherwise disable
            const gstValue = document.getElementById('gst').value;
            if (gstValue === 'N') {
                const taxSelect = document.querySelector(`#row-${rowCount} .tax-select`);
                Array.from(taxSelect.options).forEach((option) => (option.selected = false));
                taxSelect.disabled = true;
                calculateRowAmount(rowCount);
            }
        }

        function updateProductDetails(rowId) {
            const row = document.getElementById(`row-${rowId}`);
            const productSelect = row.querySelector('.product-select');
            const productId = productSelect.value;
            const product = products.find((p) => p.id == productId);

            // First remove any existing duplicate warnings and highlighting
            removeDuplicateWarnings();
            document.querySelectorAll('.duplicate-row').forEach((row) => {
                row.classList.remove('duplicate-row');
            });

            if (product) {
                // Update product details regardless of duplicates
                row.querySelector('.avl-qty').value = product.qty;
                row.querySelector('.qty').value = 1;
                row.querySelector('.unit-price').value = product.unit_price;
                row.querySelector('.margin-price').value = product.margin_price ?? 0;
                calculateRowAmount(rowId);
                checkQuantity(rowId);

                // Check for duplicates after updating
                checkForDuplicates(rowId);
            }
        }

        function checkForDuplicates(rowId) {
            const row = document.getElementById(`row-${rowId}`);
            const productId = row.querySelector('.product-select').value;

            if (!productId) return;

            const allRows = document.querySelectorAll('#productRows tr');
            let duplicateFound = false;

            allRows.forEach((existingRow) => {
                const existingRowId = existingRow.id.split('-')[1];
                if (existingRowId != rowId) {
                    const existingProductId = existingRow.querySelector('.product-select').value;
                    if (existingProductId == productId) {
                        duplicateFound = true;
                        row.classList.add('duplicate-row');
                        existingRow.classList.add('duplicate-row');
                        showDuplicateWarning(row, existingRow);
                    }
                }
            });
            if (duplicateFound) {
                $('.addRow').prop('disabled', true);
                document.getElementById('submit').disabled = true;
            } else {
                $('.addRow').prop('disabled', false);
                document.getElementById('submit').disabled = false;
            }
        }

        // Add event listener to remove warnings when product selection changes
        document.addEventListener('DOMContentLoaded', function () {
            document.querySelectorAll('.product-select').forEach((select) => {
                select.addEventListener('change', function () {
                    const rowId = this.closest('tr').id.split('-')[1];
                    // Remove warnings when changing selection
                    removeDuplicateWarnings();
                    document.querySelectorAll('.duplicate-row').forEach((row) => {
                        row.classList.remove('duplicate-row');
                    });
                    // Check again if the new selection is a duplicate
                    setTimeout(() => checkForDuplicates(rowId), 10);
                });
            });
        });

        function showDuplicateWarning(row1, row2) {
            // Only add if not already present
            if (!row1.querySelector('.duplicate-warning')) {
                const warning1 = document.createElement('div');
                warning1.className = 'duplicate-warning text-danger small mt-1';
                warning1.innerHTML = '<i class="fas fa-exclamation-triangle"></i> Duplicate product';
                row1.querySelector('td').appendChild(warning1);
            }

            if (!row2.querySelector('.duplicate-warning')) {
                const warning2 = document.createElement('div');
                warning2.className = 'duplicate-warning text-danger small mt-1';
                warning2.innerHTML = '<i class="fas fa-exclamation-triangle"></i> Duplicate product';
                row2.querySelector('td').appendChild(warning2);
            }
        }

        function removeDuplicateWarnings() {
            document.querySelectorAll('.duplicate-warning').forEach((warning) => {
                warning.remove();
            });
        }

        function checkQuantity(rowId) {
            const row = document.getElementById(`row-${rowId}`);
            const qtyInput = row.querySelector('.qty');
            const avlQty = parseFloat(row.querySelector('.avl-qty').value) || 0;
            const qty = parseFloat(qtyInput.value) || 0;
            const errorElement = row.querySelector('.quantity-error');
            if (isAvl != 'A') {
                if (qty > avlQty) {
                    qtyInput.classList.add('is-invalid');
                    errorElement.style.display = 'block';
                    hasQuantityError = true;
                    return false;
                } else {
                    qtyInput.classList.remove('is-invalid');
                    errorElement.style.display = 'none';

                    // Check if all other rows are also valid
                    hasQuantityError = false;
                    document.querySelectorAll('#productRows tr').forEach((r) => {
                        const rQtyInput = r.querySelector('.qty');
                        const rAvlQty = parseFloat(r.querySelector('.avl-qty').value) || 0;
                        const rQty = parseFloat(rQtyInput?.value) || 0;

                        if (rQty > rAvlQty) {
                            hasQuantityError = true;
                        }
                    });

                    return true;
                }
            }
        }

        function calculateRowAmount(rowId) {
            const row = document.getElementById(`row-${rowId}`);
            const qty = parseFloat(row.querySelector('.qty').value) || 0;
            const unitPrice = parseFloat(row.querySelector('.unit-price').value) || 0;
            const amount = qty * unitPrice;

            // Calculate tax
            const taxSelect = row.querySelector('.tax-select');
            const selectedTaxes = Array.from(taxSelect.selectedOptions).map((opt) => parseInt(opt.value));
            let taxRate = 0;

            selectedTaxes.forEach((taxId) => {
                const tax = taxes.find((t) => t.id == taxId);
                if (tax) taxRate += tax.value;
            });

            const taxAmount = amount * (taxRate / 100);
            const totalWithTax = amount + taxAmount;

            // row.querySelector('.amount').value = amount.toFixed(2);
            row.querySelector('.amount').value = totalWithTax.toFixed(2);
            calculateTotal();
        }

        function calculateTotal() {
            let subTotal = 0;
            let totalTax = 0;
            let totalQuantity = 0;
            const redeem = parseFloat($('#redeem_points').val()) * pointValue || 0;

            document.querySelectorAll('#productRows tr').forEach((row) => {
                const amount = parseFloat(row.querySelector('.amount').value) || 0;
                const qty = parseFloat(row.querySelector('.qty').value) || 0;
                const unitPrice = parseFloat(row.querySelector('.unit-price').value) || 0;
                const rowAmount = qty * unitPrice;

                totalQuantity += qty;
                subTotal += rowAmount;

                // Calculate tax for this row
                const taxSelect = row.querySelector('.tax-select');
                const selectedTaxes = Array.from(taxSelect.selectedOptions).map((opt) => parseInt(opt.value));
                let taxRate = 0;

                selectedTaxes.forEach((taxId) => {
                    const tax = taxes.find((t) => t.id == taxId);
                    if (tax) taxRate += tax.value;
                });

                totalTax += rowAmount * (taxRate / 100);
            });

            // Calculate discount
            const discountType = document.getElementById('discount_type').value;
            const discountValue = parseFloat(document.getElementById('discount').value) || 0;
            let discountAmount = 0;

            var subtotalWithTax = subTotal + totalTax;

            if (discountType == 1) {
                discountAmount = discountValue;
            } else if (discountType == 2) {
                discountAmount = subtotalWithTax * (discountValue / 100);
            }

            let totals = subtotalWithTax - discountAmount;
            total = totals - redeem;

            // Update display
            document.getElementById('subTotalDisplay').textContent = subTotal.toFixed(2) + ' ₹';
            document.getElementById('discountDisplay').textContent = discountAmount.toFixed(2) + ' ₹';
            document.getElementById('taxDisplay').textContent = totalTax.toFixed(2) + ' ₹';
            document.getElementById('totalDisplay').textContent = Math.round(total).toFixed(2) + ' ₹';
            document.getElementById('totalQuantity').textContent = totalQuantity;

            // Update hidden fields
            document.getElementById('sub_total').value = subTotal.toFixed(2);
            document.getElementById('discount_amt').value = discountAmount.toFixed(2);
            document.getElementById('tax').value = totalTax.toFixed(2);
            document.getElementById('total_amt').value = Math.round(total).toFixed(2);
            updateBalances();
        }

        function toggleTaxes() {
            const gstValue = document.getElementById('gst').value;
            const taxSelects = document.querySelectorAll('.tax-select');

            taxSelects.forEach((select) => {
                if (gstValue === 'N') {
                    select.innerHTML = '<option value="no-tax" selected>No Tax</option>';
                    select.disabled = true;
                } else {
                    select.disabled = false;
                    select.innerHTML = taxes
                        .map((t) => {
                            const isDefault = defaultTaxIds.includes(t.id);
                            return `<option value="${t.id}" ${isDefault ? 'selected' : ''}>${t.name} - ${t.value}%</option>`;
                        })
                        .join('');
                }
            });

            calculateTotal();
        }

        function toggleNotesAndTerms(baseLabel) {
            const section = document.getElementById('notesTermsSection');
            const btn = document.getElementById('notesTermsBtn');

            const isVisible = section.style.display === 'flex' || section.style.display === 'block';

            section.style.display = isVisible ? 'none' : 'flex';

            if (!isVisible) {
                btn.innerHTML = `<i class="fas fa-minus"></i> Remove ${baseLabel}`;
            } else {
                btn.innerHTML = `<i class="fas fa-plus"></i> ${baseLabel}`;
            }
        }

        function removeRow(rowId) {
            document.getElementById(`row-${rowId}`).remove();
            calculateTotal();

            // remove any leftover duplicate styling/warnings
            removeDuplicateWarnings();
            document.querySelectorAll('.duplicate-row').forEach((r) => r.classList.remove('duplicate-row'));

            // now re-scan remaining rows for duplicates
            const allRows = document.querySelectorAll('#productRows tr');
            let duplicateFound = false;

            allRows.forEach((row) => {
                const thisRowId = row.id.split('-')[1];
                const thisProductId = row.querySelector('.product-select').value;

                if (!thisProductId) return;

                allRows.forEach((otherRow) => {
                    const otherRowId = otherRow.id.split('-')[1];

                    if (otherRowId !== thisRowId) {
                        const otherProductId = otherRow.querySelector('.product-select').value;

                        if (thisProductId === otherProductId) {
                            duplicateFound = true;
                            row.classList.add('duplicate-row');
                            otherRow.classList.add('duplicate-row');
                            showDuplicateWarning(row, otherRow);
                        }
                    }
                });
            });

            // toggle buttons based on remaining duplicates
            if (duplicateFound) {
                $('.addRow').prop('disabled', true);
                document.getElementById('submit').disabled = true;
            } else {
                $('.addRow').prop('disabled', false);
                document.getElementById('submit').disabled = false;
            }
        }

        // Form submission validation
        function validateForm(event) {
            // First check all quantities
            document.querySelectorAll('#productRows tr').forEach((row) => {
                const rowId = row.id.split('-')[1];
                checkQuantity(rowId);
            });

            if (hasQuantityError) {
                event.preventDefault();
                Swal.fire({
                    icon: 'error',
                    title: 'Quantity Error',
                    text: 'Please fix quantity errors before submitting. Some items have quantity greater than available stock.',
                    confirmButtonText: 'OK',
                });
                return false;
            }

            return true;
        }

        // Initialize on page load
        $(document).ready(function () {
            $('#client_num_select').select2({
                placeholder: 'Search or type a number',
                allowClear: true,
                tags: true,
                tokenSeparators: [',', ' '],
                width: '100%',
                createTag: function (params) {
                    if (params.term.trim() === '') {
                        return null;
                    }

                    return {
                        id: params.term,
                        text: params.term,
                    };
                },
            });

            document.getElementById('invoice_date').valueAsDate = new Date();
            document.getElementById('due_date').valueAsDate = new Date();

            document.getElementById('discount_type').addEventListener('change', function () {
                document.getElementById('discount').readOnly = !this.value;
                calculateTotal();
            });

            // Add form submission handler
            document.querySelector('form').addEventListener('submit', validateForm);
        });

        $(document).ready(function () {
            toggleTaxes();

            $('#gst').on('change', function () {
                toggleTaxes();
                document.querySelectorAll('#productRows tr').forEach((row) => {
                    const rowId = row.id.split('-')[1];
                    calculateRowAmount(rowId);
                });
            });
        });

        $(document).ready(function () {
            let existingClientNumbers = $('#client_num_select option')
                .map(function () {
                    return $(this).val();
                })
                .get();

            $(document).ready(function () {
                let existingClientNumbers = $('#client_num_select option')
                    .map(function () {
                        return $(this).val();
                    })
                    .get();

                $('#client_num_select').on('change', function () {
                    let selectedNumbers = $(this).val() || [];
                    let errorElement = $('#client_num_error');

                    let selectedOption = $(this).find('option:selected').first();
                    let clientID = selectedOption.data('clientid');
                    $('.redeem_points').hide();

                    if (isLoyalty == 'A') {
                        if (clientID) {
                            $.ajax({
                                url: '{{ route("single-client") }}',
                                type: 'GET',
                                data: { clientID: clientID },
                                success: function (data) {
                                    $('.redeem_points').hide();

                                    let earnPoints = data.earnPoints;
                                    redeemPoints = data.redeemPoints;
                                    avlPoint = data.availablePoints;

                                    $('#earnPoints').text(earnPoints + ' ');
                                    $('#redeemPoints').text(redeemPoints + ' ');
                                    $('#availablePoints').text(avlPoint + ' ');
                                    $('#earnPoints, #redeemPoints, #availablePoints').append(
                                        '<i class="fa-solid fa-coins text-warning"></i>',
                                    );

                                    document.getElementById('earn_point').value = earnPoints;
                                    document.getElementById('redeem_point').value = redeemPoints;
                                    document.getElementById('available_point').value = avlPoint;

                                    $('.redeem_points').show();
                                },
                                error: function (xhr) {
                                    console.log(xhr);
                                },
                            });
                        }
                    } else {
                        if (clientID) {
                            $.ajax({
                                url: '{{ route("single-client") }}',
                                type: 'GET',
                                data: { clientID: clientID },
                                success: function (data) {
                                    $('#client_name').val(
                                        `${data?.client?.user?.name || ''} ${data?.client?.user?.last_name || ''}`.trim(),
                                    );
                                    $('.due_amount').html('₹ ' + data.dueAmount.toFixed(2));
                                    previousDue = parseFloat(data.dueAmount) || 0;
                                    updateBalances();
                                },
                                error: function (xhr) {
                                    console.log(xhr);
                                },
                            });
                        }
                    }
                    // Check if empty
                    if (selectedNumbers.length === 0) {
                        errorElement.text('Please select or enter a client number').show();
                        return;
                    } else {
                        errorElement.hide();
                    }

                    let hasNewNumber = selectedNumbers.some((num) => !existingClientNumbers.includes(num));

                    if (hasNewNumber) {
                        $('.redeem_points').hide();
                        $('#client_name').prop('required', true);
                        $('#client_name_error').text('Please enter Client Name').show();
                    }
                    $('#client_name').on('input', function () {
                        let name = $(this).val().trim();
                        if (name !== '') {
                            $('#client_name_error').text('').hide();
                            $(this).removeClass('is-invalid');
                        } else {
                            $('#client_name_error').text('Please enter Client Name').show();
                            $(this).addClass('is-invalid');
                        }
                    });
                });

                $('form').on('submit', function (e) {
                    let selectedNumbers = $('#client_num_select').val() || [];
                    let errorElement = $('#client_num_error');

                    if (selectedNumbers.length === 0) {
                        errorElement.text('Please select or enter a client number').show();
                        e.preventDefault();

                        // Scroll to the error
                        $('html, body').animate(
                            {
                                scrollTop: errorElement.offset().top - 100,
                            },
                            500,
                        );

                        return false;
                    }
                    return true;
                });

                $('#client_name').on('input', function () {
                    if ($(this).val().trim() !== '') {
                        $('#client_name_error').hide();
                    }
                });
            });
            $('#redeem_points').on('change input', function () {
                let entered_points = parseFloat($(this).val()) || 0;

                let container = $(this).closest('.current_point');
                let errorElement = container.find('.error-feedback');

                errorElement.text('').hide();
                $(this).removeClass('is-invalid');

                if (entered_points > avlPoint) {
                    errorElement.text('Redeem points cannot exceed available points').show();
                    $(this).addClass('is-invalid');
                    $(this).val(avlPoint);
                    return false;
                }
                currentPoint = avlPoint - entered_points;
                redeemedPoints = redeemPoints + entered_points;
                $('#availablePoints').text(currentPoint + ' ');
                $('#redeemPoints').text(redeemedPoints + ' ');
                $('#availablePoints,#redeemPoints').append('<i class="fa-solid fa-coins text-warning"></i>');
                calculateTotal();
            });
        });
        $(document).ready(function () {
            function calculatePaymentBreakdown() {
                let total_amount = parseFloat($('#total_amt').val()) || 0;
                let tendered_amount = parseFloat($('#tendered_amount').val()) || 0;
                let upi_amount = parseFloat($('#upi').val()) || 0;
                let online_amount = parseFloat($('#online').val()) || 0;
                let cash_amount = parseFloat($('#cash').val()) || 0;

                let digital_payments = upi_amount + online_amount;

                let remaining_after_digital = total_amount - digital_payments;
                if (remaining_after_digital < 0) remaining_after_digital = 0;

                let extra_amount = 0;
                if (tendered_amount == 0 || tendered_amount == '') {
                    $('#cash').val('');
                }
                if (tendered_amount > 0) {
                    let cash_to_take = Math.min(tendered_amount, remaining_after_digital);
                    $('#cash').val(cash_to_take.toFixed(2));
                    cash_amount = cash_to_take;

                    extra_amount = tendered_amount - cash_amount;
                } else {
                    let total_paid = digital_payments + cash_amount;
                    extra_amount = total_paid - total_amount;
                }

                if (extra_amount < 0) extra_amount = 0;

                $('.extra_amount').text('Extra Amount: ₹ ' + extra_amount.toFixed(2));
            }

            $(document).on('input', '#tendered_amount, #upi, #online, #cash', function () {
                calculatePaymentBreakdown();
                updateBalances();
            });

            $(document).on('change', function () {
                calculatePaymentBreakdown();
            });
        });
        function updateBalances() {
            let invoiceTotal = parseFloat($('#total_amt').val()) || 0;

            let upi = parseFloat($('#upi').val()) || 0;
            let online = parseFloat($('#online').val()) || 0;
            let cash = parseFloat($('#cash').val()) || 0;

            let paid = upi + online + cash;

            let invoiceBalance = invoiceTotal - paid;
            if (invoiceBalance < 0) invoiceBalance = 0;

            let totalBalance = previousDue + invoiceBalance;

            $('#invoiceBalance').text('₹ ' + invoiceBalance.toFixed(2));
            $('#totalBalance').text('₹ ' + totalBalance.toFixed(2));
        }
            $(document).on('change blur', '.amount', function () {
                const row = $(this).closest('tr');
                const amountWithTax = parseFloat($(this).val()) || 0;
                const qty = parseFloat(row.find('.qty').val()) || 1;

                const margin = parseFloat(row.find('.margin-price').val()) || 0;

                const taxSelect = row.find('.tax-select')[0];
                const selectedTaxes = Array.from(taxSelect.selectedOptions).map(opt => parseFloat(opt.value));

                let taxPercent = 0;
                selectedTaxes.forEach(id => {
                    const taxDetails = taxes.find(t => t.id == id);
                    if (taxDetails) taxPercent += parseFloat(taxDetails.value);
                });

                const divisor = 1 + (taxPercent / 100);
                const netAmount = amountWithTax / divisor;

                let newUnitPrice = netAmount / qty;

                if (newUnitPrice < margin) {
                    const marginNetAmount = margin * qty;
                    const finalAmount = marginNetAmount * divisor;

                    $(this).val(finalAmount.toFixed(2));
                    row.find('.unit-price').val(margin.toFixed(2));

                    Swal.fire({
                        icon: "warning",
                        title: "Below Margin Price",
                        text: "Unit price cannot go below the product’s minimum margin.",
                        confirmButtonText: "OK"
                    });

                    calculateTotal();
                    return;
                }

                row.find('.unit-price').val(newUnitPrice.toFixed(2));

                $(this).val(amountWithTax.toFixed(2));

                calculateTotal();
            });

    </script>
@endpush