$(document).ready(function () {
    let productIndex = 1;
    let originalProductOptions = ""; // Store original product options

    // Initialize Select2
    $(".select2").select2({
        placeholder: "Pilih...",
        allowClear: true,
    });

    // Store original product options on page load
    const firstSelect = $(".product-select").first();
    if (firstSelect.length > 0) {
        originalProductOptions = firstSelect.html();
    }

    // Prevent same dealer selection
    $("#from_dealer_id, #to_dealer_id").on("change", function () {
        const fromDealerId = $("#from_dealer_id").val();
        const toDealerId = $("#to_dealer_id").val();

        if (fromDealerId && toDealerId && fromDealerId === toDealerId) {
            $(this).val("").trigger("change");
            alert("Dealer asal dan tujuan tidak boleh sama!");
        }

        // Update available stock when dealer changes
        updateAllAvailableStock();
    });

    // Add new product row
    $("#add-product").on("click", function () {
        const newRow = createProductRow(productIndex);
        $("#products-tbody").append(newRow);

        // Initialize Select2 for new row after it's added to DOM
        const newSelect = $(
            `#products-tbody tr[data-index="${productIndex}"] .product-select`
        );
        newSelect.select2({
            placeholder: "Pilih...",
            allowClear: true,
        });

        productIndex++;
        updateRemoveButtons();
    });

    // Remove product row
    $(document).on("click", ".remove-product", function () {
        $(this).closest("tr").remove();
        updateRemoveButtons();
        reindexRows();
    });

    // Handle product selection change
    $(document).on("change", ".product-select", function () {
        const row = $(this).closest("tr");
        const productId = $(this).val();
        const fromDealerId = $("#from_dealer_id").val();

        if (productId && fromDealerId) {
            getAvailableStock(productId, fromDealerId, row);
        } else {
            row.find(".available-stock").text("-");
            row.find(".quantity-input").attr("max", "");
        }
    });

    // Validate quantity input
    $(document).on("input", ".quantity-input", function () {
        const maxValue = parseFloat($(this).attr("max"));
        const currentValue = parseFloat($(this).val());

        if (maxValue && currentValue > maxValue) {
            $(this).val(maxValue);
            $(this).addClass("is-invalid");

            if (!$(this).siblings(".invalid-feedback").length) {
                $(this).after(
                    '<div class="invalid-feedback">Quantity melebihi stock yang tersedia</div>'
                );
            }
        } else {
            $(this).removeClass("is-invalid");
            $(this).siblings(".invalid-feedback").remove();
        }
    });

    // Form submission
    $("#mutation-form").on("submit", function (e) {
        e.preventDefault();

        if (!validateForm()) {
            return false;
        }

        const submitBtn = $("#submit-btn");
        const originalText = submitBtn.html();

        submitBtn
            .prop("disabled", true)
            .html('<i class="la la-spinner la-spin"></i> Menyimpan...');

        // Submit form
        this.submit();
    });

    function createProductRow(index) {
        return `
            <tr class="product-row" data-index="${index}">
                <td>
                    <select name="products[${index}][product_id]" class="form-control product-select" required>
                        ${originalProductOptions}
                    </select>
                </td>
                <td class="text-center">
                    <span class="available-stock text-muted">-</span>
                </td>
                <td>
                    <input type="number" 
                           name="products[${index}][quantity_requested]" 
                           class="form-control quantity-input" 
                           min="0.01" 
                           step="0.01" 
                           placeholder="0" 
                           required>
                </td>

                <td>
                    <button type="button" class="btn btn-danger btn-sm remove-product">
                        <i class="la la-trash"></i>
                    </button>
                </td>
            </tr>
        `;
    }

    function updateRemoveButtons() {
        const rows = $(".product-row");
        $(".remove-product").prop("disabled", rows.length <= 1);
    }

    function reindexRows() {
        $(".product-row").each(function (index) {
            $(this).attr("data-index", index);
            $(this)
                .find('select[name*="product_id"]')
                .attr("name", `products[${index}][product_id]`);
            $(this)
                .find('input[name*="quantity_requested"]')
                .attr("name", `products[${index}][quantity_requested]`);
        });
        productIndex = $(".product-row").length;
    }

    function getAvailableStock(productId, dealerId, row) {
        $.ajax({
            url: "/warehouse/mutations/get-product-stock",
            method: "GET",
            data: {
                product_id: productId,
                dealer_id: dealerId,
            },
            beforeSend: function () {
                row.find(".available-stock").html(
                    '<i class="la la-spinner la-spin"></i>'
                );
            },
            success: function (response) {
                const stock = parseFloat(response.current_stock);
                row.find(".available-stock").text(stock.toLocaleString());
                row.find(".quantity-input").attr("max", stock);

                // Set max value message
                if (stock <= 0) {
                    row.find(".available-stock")
                        .addClass("text-danger")
                        .removeClass("text-muted");
                    row.find(".quantity-input").attr("readonly", true).val("");
                } else {
                    row.find(".available-stock")
                        .removeClass("text-danger")
                        .addClass("text-muted");
                    row.find(".quantity-input").attr("readonly", false);
                }
            },
            error: function () {
                row.find(".available-stock")
                    .text("Error")
                    .addClass("text-danger");
            },
        });
    }

    function updateAllAvailableStock() {
        const fromDealerId = $("#from_dealer_id").val();

        $(".product-row").each(function () {
            const row = $(this);
            const productId = row.find(".product-select").val();

            if (productId && fromDealerId) {
                getAvailableStock(productId, fromDealerId, row);
            } else {
                row.find(".available-stock").text("-");
                row.find(".quantity-input").attr("max", "");
            }
        });
    }

    function validateForm() {
        let isValid = true;
        const fromDealerId = $("#from_dealer_id").val();
        const toDealerId = $("#to_dealer_id").val();

        // Check dealers
        if (!fromDealerId) {
            alert("Pilih dealer asal");
            return false;
        }

        if (!toDealerId) {
            alert("Pilih dealer tujuan");
            return false;
        }

        if (fromDealerId === toDealerId) {
            alert("Dealer asal dan tujuan tidak boleh sama");
            return false;
        }

        // Check products
        const productRows = $(".product-row");
        if (productRows.length === 0) {
            alert("Tambahkan minimal satu produk");
            return false;
        }

        let hasValidProduct = false;
        productRows.each(function () {
            const productId = $(this).find(".product-select").val();
            const quantity = $(this).find(".quantity-input").val();

            if (productId && quantity && parseFloat(quantity) > 0) {
                hasValidProduct = true;
            }
        });

        if (!hasValidProduct) {
            alert("Pilih minimal satu produk dengan quantity yang valid");
            return false;
        }

        return isValid;
    }
});