(function () {
    "use strict";

    function updateCart(product, quantity, replace) {
        var key = "aksrt_cart";
        var current;

        try {
            current = JSON.parse(localStorage.getItem(key) || "[]");
            if (!Array.isArray(current)) {
                current = [];
            }
        } catch (error) {
            current = [];
        }

        var index = current.findIndex(function (item) {
            return Number(item.product_id || item.id || 0) === Number(product.product_id);
        });

        if (index >= 0) {
            current[index].qty = replace ? quantity : Number(current[index].qty || 1) + quantity;
        } else {
            current.push({
                product_id: product.product_id,
                id: product.product_id,
                title: product.title,
                image: product.image,
                price: product.price,
                qty: quantity
            });
        }

        localStorage.setItem(key, JSON.stringify(current));
    }

    var productPage = document.querySelector("[data-aksrt-product-page]");
    if (productPage) {
        var quantityInput = productPage.querySelector("[data-aksrt-quantity]");
        var productId = Number(productPage.getAttribute("data-product-id") || 0);
        var titleEl = productPage.querySelector(".aksrt-product-page__title");
        var imageEl = productPage.querySelector(".aksrt-product-page__primary-image img");
        var priceEl = productPage.querySelector(".aksrt-product-page__price");
        var couponEl = productPage.querySelector("[data-aksrt-product-coupon]");

        productPage.addEventListener("click", function (event) {
            var qtyBtn = event.target.closest("[data-aksrt-qty-action]");
            if (qtyBtn && quantityInput) {
                var action = qtyBtn.getAttribute("data-aksrt-qty-action");
                var current = Number(quantityInput.value || 1);
                var max = Number(quantityInput.getAttribute("max") || 999);
                quantityInput.value = action === "inc" ? Math.min(max, current + 1) : Math.max(1, current - 1);
                return;
            }

            if (event.target.closest("[data-aksrt-add-cart]")) {
                updateCart({
                    product_id: productId,
                    title: titleEl ? titleEl.textContent.trim() : "商品",
                    image: imageEl ? imageEl.getAttribute("src") : "",
                    price: Number((priceEl ? priceEl.textContent : "0").replace(/[^\d.]/g, ""))
                }, Number(quantityInput ? quantityInput.value : 1), false);
                if (typeof window.aksrtToast === 'function') { window.aksrtToast("已加入购物车。", 'success'); }
                else { window.alert("已加入购物车。"); }
                return;
            }

            if (event.target.closest("[data-aksrt-buy-now]")) {
                updateCart({
                    product_id: productId,
                    title: titleEl ? titleEl.textContent.trim() : "商品",
                    image: imageEl ? imageEl.getAttribute("src") : "",
                    price: Number((priceEl ? priceEl.textContent : "0").replace(/[^\d.]/g, ""))
                }, Number(quantityInput ? quantityInput.value : 1), true);

                var cartUrl = new URL(aksrtData.cartUrl || window.location.href, window.location.origin);
                if (couponEl && couponEl.value) {
                    cartUrl.searchParams.set("coupon", couponEl.value);
                }
                window.location.href = cartUrl.toString();
            }
        });

        productPage.addEventListener("click", function (event) {
            var thumb = event.target.closest("[data-aksrt-product-thumb]");
            var primaryImage = productPage.querySelector(".aksrt-product-page__primary-image img");
            if (thumb && primaryImage) {
                primaryImage.setAttribute("src", thumb.getAttribute("data-aksrt-product-thumb"));
            }
        });

        // SKU 规格选择器
        var skuSelector = productPage.querySelector("[data-aksrt-sku-selector]");
        if (skuSelector) {
            var selectedSpecs = {};
            var skuInfo = productPage.querySelector("[data-aksrt-sku-info]");
            var skuPrice = skuInfo ? skuInfo.querySelector(".aksrt-product-page__sku-price") : null;
            var skuStock = skuInfo ? skuInfo.querySelector(".aksrt-product-page__sku-stock") : null;
            var skus = [];

            try {
                var skuData = skuSelector.getAttribute("data-aksrt-skus");
                if (skuData) skus = JSON.parse(skuData);
            } catch (e) { /* ignore */ }

            skuSelector.addEventListener("click", function (event) {
                var btn = event.target.closest("[data-aksrt-spec]");
                if (!btn) return;

                var specIndex = btn.getAttribute("data-aksrt-spec");
                var specVal = btn.getAttribute("data-aksrt-spec-val");

                // 切换选中状态
                var siblings = skuSelector.querySelectorAll('[data-aksrt-spec="' + specIndex + '"]');
                siblings.forEach(function (s) { s.classList.remove("is-active"); });
                btn.classList.add("is-active");

                selectedSpecs[specIndex] = specVal;

                // 查找匹配的 SKU
                var matchedSku = findMatchingSku(skus, selectedSpecs);
                if (matchedSku && skuInfo) {
                    skuInfo.hidden = false;
                    if (skuPrice) skuPrice.textContent = "¥" + Number(matchedSku.price || 0).toFixed(2);
                    if (skuStock) skuStock.textContent = "库存: " + (matchedSku.stock || 0);

                    // 更新主价格显示
                    if (priceEl) priceEl.textContent = "¥" + Number(matchedSku.price || 0).toFixed(2);

                    // 更新库存限制
                    if (quantityInput) {
                        quantityInput.setAttribute("max", String(matchedSku.stock || 999));
                        if (Number(quantityInput.value) > (matchedSku.stock || 999)) {
                            quantityInput.value = matchedSku.stock || 1;
                        }
                    }

                    // 更新主图
                    if (matchedSku.image && primaryImage) {
                        primaryImage.setAttribute("src", matchedSku.image);
                    }
                } else if (skuInfo) {
                    skuInfo.hidden = true;
                }
            });

            function findMatchingSku(skus, specs) {
                if (!skus.length) return null;
                var specKeys = Object.keys(specs);
                if (specKeys.length === 0) return null;

                return skus.find(function (sku) {
                    if (!sku.specs) return false;
                    return specKeys.every(function (key) {
                        return sku.specs[key] === specs[key];
                    });
                }) || null;
            }
        }
    }

    var editor = document.querySelector("[data-aksrt-product-editor]");
    if (!editor || !window.aksrtData) {
        return;
    }

    var form = editor.querySelector("[data-aksrt-product-form]");
    var messageEl = editor.querySelector("[data-aksrt-product-editor-message]");

    function selectedMultiValues(select) {
        if (!select) {
            return [];
        }

        return Array.prototype.slice.call(select.options)
            .filter(function (option) {
                return option.selected;
            })
            .map(function (option) {
                return Number(option.value || 0);
            })
            .filter(Boolean);
    }

    form.addEventListener("submit", function (event) {
        event.preventDefault();

        var formData = new FormData(form);
        var productId = Number(editor.getAttribute("data-product-id") || 0);
        var gallery = String(formData.get("gallery") || "")
            .split(/\r?\n/)
            .map(function (line) { return line.trim(); })
            .filter(Boolean);

        var payload = {
            title: String(formData.get("title") || "").trim(),
            price: Number(formData.get("price") || 0),
            stock: Number(formData.get("stock") || 0),
            excerpt: String(formData.get("excerpt") || ""),
            content: String(formData.get("content") || ""),
            status: String(formData.get("status") || "draft"),
            categories: selectedMultiValues(form.querySelector('select[name="categories[]"]')),
            tags: String(formData.get("tags") || "")
                .split(",")
                .map(function (tag) { return tag.trim(); })
                .filter(Boolean),
            image: String(formData.get("image") || "").trim(),
            gallery: gallery,
            shipping_mode: String(formData.get("shipping_mode") || "express"),
            shipping_fee: Number(formData.get("shipping_fee") || 0),
            after_sale_policy: String(formData.get("after_sale_policy") || ""),
            support_refund: formData.get("support_refund") === "1"
        };

        var path = productId > 0 ? "/shop/frontend/products/" + productId : "/shop/frontend/products";
        messageEl.textContent = "正在保存商品...";

        fetch("/wp-json/aksrt/v1" + path, {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "X-WP-Nonce": aksrtData.restNonce
            },
            body: JSON.stringify(payload)
        })
            .then(function (response) { return response.json(); })
            .then(function (result) {
                if (!result.success) {
                    messageEl.textContent = result.message || "保存失败。";
                    return;
                }

                var centerUrl = aksrtData.userCenterUrl || "/";
                messageEl.textContent = "商品已保存，正在返回用户中心...";
                window.location.href = centerUrl;
            })
            .catch(function () {
                messageEl.textContent = "网络错误，请稍后重试。";
            });
    });
})();