/**
 * Knowledge-payment order center interactions.
 *
 * @package AKSRT
 */

(function () {
    "use strict";

    var page = document.querySelector("[data-aksrt-order-center]");
    if (!page || !window.aksrtData) return;

    var detailModal = page.querySelector("[data-aksrt-order-detail-modal]");
    var detailBody = page.querySelector("[data-aksrt-order-detail-body]");
    var detailFooter = page.querySelector("[data-aksrt-order-detail-footer]");
    var detailOrderNumber = "";

    function toast(message) {
        if (window.AksrtToast && typeof window.AksrtToast.show === "function") {
            window.AksrtToast.show(message);
            return;
        }
        window.alert(message);
    }

    function restRoot() {
        return String(aksrtData.siteUrl || "").replace(/\/$/, "") + "/wp-json/aksrt/v1";
    }

    function request(path, body, method) {
        var options = {
            method: method || "POST",
            credentials: "same-origin",
            headers: { "X-WP-Nonce": aksrtData.restNonce || "" }
        };
        if (body !== undefined) {
            options.headers["Content-Type"] = "application/json";
            options.body = JSON.stringify(body || {});
        }
        return fetch(restRoot() + path, options).then(function (response) {
            return response.json().catch(function () {
                return { success: false, message: "请求失败（HTTP " + response.status + "）" };
            });
        });
    }

    function orderPath(orderNumber, suffix) {
        return "/orders/" + encodeURIComponent(orderNumber || "") + (suffix || "");
    }

    function escapeHtml(value) {
        return String(value == null ? "" : value)
            .replace(/&/g, "&amp;").replace(/</g, "&lt;")
            .replace(/>/g, "&gt;").replace(/\"/g, "&quot;")
            .replace(/'/g, "&#39;");
    }

    function formatMoney(order) {
        var amount = Number(order && order.amount || 0);
        return order && order.is_points
            ? escapeHtml(order.currency_symbol || "积分") + " " + Math.round(amount)
            : "¥" + amount.toFixed(2);
    }

    function closeDetail() {
        if (detailModal) detailModal.hidden = true;
        detailOrderNumber = "";
        document.documentElement.classList.remove("aksrt-modal-open");
    }

    function renderDetail(order) {
        if (!detailBody || !detailFooter) return;
        var actions = order.actions || {};
        var image = order.image || "";
        var title = order.product_name || "订单";
        var status = order.status_group || "closed";
        var html = '<div class="aksrt-order-detail__hero is-' + escapeHtml(status) + '">';
        html += '<span class="aksrt-order-detail__status-pill is-' + escapeHtml(status) + '">' + escapeHtml(order.status_label || "") + "</span>";
        html += '<strong class="aksrt-order-detail__hero-amount">' + formatMoney(order) + "</strong></div>";
        html += '<div class="aksrt-order-detail__product">';
        html += image ? '<img class="aksrt-order-detail__thumb" src="' + escapeHtml(image) + '" alt="">' : '<span class="aksrt-order-detail__thumb aksrt-order-detail__thumb--empty"><i class="fas fa-book-open"></i></span>';
        html += '<div><strong class="aksrt-order-detail__product-title">' + escapeHtml(title) + "</strong>";
        html += '<span class="aksrt-order-detail__product-meta">' + escapeHtml(order.product_type_label || "") + "</span></div></div>";
        html += '<dl class="aksrt-order-detail__list">';
        [["订单编号", order.order_number], ["创建时间", order.created_at], ["支付时间", order.paid_at || "—"]].forEach(function (row) {
            html += "<div><dt>" + escapeHtml(row[0]) + "</dt><dd>" + escapeHtml(row[1] || "—") + "</dd></div>";
        });
        html += "</dl>";
        detailBody.innerHTML = html;

        var footer = '<button class="btn-outline" type="button" data-aksrt-order-detail-close>关闭</button>';
        if (actions.can_cancel) footer += '<button class="btn-ghost" type="button" data-aksrt-order-cancel="' + escapeHtml(order.order_number) + '">关闭订单</button>';
        if (actions.can_pay) footer += '<button class="btn-primary" type="button" data-aksrt-order-pay="' + escapeHtml(order.order_number) + '" data-aksrt-order-method="' + escapeHtml((order.payment_method || {}).value || "") + '">继续支付</button>';
        if (actions.can_open && order.permalink) footer += '<a class="btn-primary" href="' + escapeHtml(order.permalink) + '">' + escapeHtml(order.entitlement_label || "打开已购内容") + "</a>";
        detailFooter.innerHTML = footer;
    }

    function openDetail(orderNumber) {
        if (!detailModal || !detailBody) return;
        detailOrderNumber = orderNumber;
        detailBody.innerHTML = '<p class="muted-2-color">加载中…</p>';
        detailFooter.innerHTML = "";
        detailModal.hidden = false;
        document.documentElement.classList.add("aksrt-modal-open");
        request(orderPath(orderNumber), undefined, "GET").then(function (result) {
            if (orderNumber !== detailOrderNumber) return;
            if (!result.success || !result.data) {
                detailBody.innerHTML = '<p class="c-red">' + escapeHtml(result.message || "订单不存在") + "</p>";
                return;
            }
            renderDetail(result.data);
        }).catch(function () {
            detailBody.innerHTML = '<p class="c-red">网络错误，请稍后重试</p>';
        });
    }

    function currentViewPath() {
        var params = new URLSearchParams(window.location.search);
        var allowed = ["order_status", "order_type", "order_number", "order_page"];
        var query = new URLSearchParams();
        allowed.forEach(function (key) { if (params.get(key)) query.set(key, params.get(key)); });
        return "/orders/view" + (query.toString() ? "?" + query.toString() : "");
    }

    function actionHtml(order) {
        var actions = order.actions || {};
        var html = '<button class="btn-outline" type="button" data-aksrt-order-detail="' + escapeHtml(order.order_number) + '">订单详情</button>';
        if (actions.can_cancel) html += '<button class="btn-ghost" type="button" data-aksrt-order-cancel="' + escapeHtml(order.order_number) + '">关闭订单</button>';
        if (actions.can_pay) html += '<button class="btn-primary" type="button" data-aksrt-order-pay="' + escapeHtml(order.order_number) + '" data-aksrt-order-method="' + escapeHtml((order.payment_method || {}).value || '') + '">继续支付</button>';
        if (actions.can_open && order.permalink) html += '<a class="btn-primary is-entitlement" href="' + escapeHtml(order.permalink) + '">' + escapeHtml(order.entitlement_label || '打开已购内容') + '</a>';
        return html;
    }

    function cardHtml(order) {
        var image = order.image
            ? '<img class="aksrt-orders-page__card-img" src="' + escapeHtml(order.image) + '" alt="">'
            : '<div class="aksrt-orders-page__card-art" aria-hidden="true"><i class="fas fa-book-open"></i></div>';
        var countdown = Number(order.time_left || 0) > 0
            ? '<span class="aksrt-orders-page__countdown" data-aksrt-order-countdown="' + Number(order.time_left) + '"></span>'
            : '';
        return '<article class="aksrt-orders-page__card" data-aksrt-order-card="' + escapeHtml(order.order_number) + '" data-order-status="' + escapeHtml(order.status_group || '') + '">' +
            '<div class="aksrt-orders-page__card-rail"><span>' + escapeHtml(order.product_type_label || '') + '</span><time>' + escapeHtml(order.created_at || '') + '</time><span class="aksrt-orders-page__card-status is-' + escapeHtml(order.status_group || '') + '">' + escapeHtml(order.status_label || '') + '</span></div>' +
            '<div class="aksrt-orders-page__card-main">' + image + '<div class="aksrt-orders-page__card-copy"><h3>' + escapeHtml(order.product_name || '订单') + '</h3><p>订单号 ' + escapeHtml(order.order_number) + '</p></div><div class="aksrt-orders-page__card-value"><strong>' + formatMoney(order) + '</strong><span>实付</span></div></div>' +
            '<footer class="aksrt-orders-page__card-actions">' + countdown + actionHtml(order) + '</footer></article>';
    }

    function renderStats(stats) {
        var root = page.querySelector('[data-aksrt-order-stats]');
        if (!root) return;
        root.innerHTML = '<div class="aksrt-orders-page__stat"><span>全部</span><strong>' + Number(stats.total || 0) + '</strong></div>' +
            '<div class="aksrt-orders-page__stat"><span>待支付</span><strong class="is-pending">' + Number(stats.pending || 0) + '</strong></div>' +
            '<div class="aksrt-orders-page__stat"><span>已生效</span><strong class="is-completed">' + Number(stats.completed || 0) + '</strong></div>';
    }

    function renderPagination(view) {
        var existing = page.querySelector('.aksrt-orders-page__pagination');
        if (existing) existing.remove();
        if (Number(view.total_pages || 1) <= 1) return;
        var root = document.createElement('nav');
        root.className = 'aksrt-orders-page__pagination';
        root.setAttribute('aria-label', '订单分页');
        var base = new URL(window.location.href);
        for (var i = 1; i <= Number(view.total_pages); i++) {
            base.searchParams.set('order_page', String(i));
            var link = document.createElement('a');
            link.className = 'aksrt-orders-page__page-chip' + (i === Number(view.page) ? ' is-active' : '');
            link.href = base.toString();
            link.textContent = String(i);
            root.appendChild(link);
        }
        var list = page.querySelector('[data-aksrt-order-list]');
        if (list) list.after(root);
    }

    function renderView(view) {
        renderStats(view.stats || {});
        var list = page.querySelector('[data-aksrt-order-list]');
        if (!list) return;
        var items = Array.isArray(view.items) ? view.items : [];
        if (!items.length) {
            list.innerHTML = '<div class="aksrt-orders-page__empty"><i class="fas fa-receipt" aria-hidden="true"></i><h3>没有匹配的订单</h3><p>换个条件试试，或清除当前筛选。</p></div>';
            list.classList.add('is-empty');
        } else {
            list.classList.remove('is-empty');
            list.innerHTML = items.map(cardHtml).join('');
        }
        renderPagination(view);
        if (detailOrderNumber) {
            var detail = items.filter(function (item) { return item.order_number === detailOrderNumber; })[0];
            if (detail) renderDetail(detail); else closeDetail();
        }
        updateCountdowns();
    }

    function refreshView() {
        return request(currentViewPath(), undefined, "GET").then(function (result) {
            if (!result.success || !result.data) throw new Error(result.message || "刷新失败");
            renderView(result.data);
            return result.data;
        }).catch(function (error) {
            toast(error.message || "订单状态已变更，请刷新后查看");
        });
    }

    function startPayment(button) {
        var number = button.getAttribute("data-aksrt-order-pay") || "";
        var method = button.getAttribute("data-aksrt-order-method") || "";
        if (!number) return;
        button.disabled = true;
        request(orderPath(number, "/pay"), method ? { payment_method: method } : {}).then(function (result) {
            if (!result.success) throw new Error(result.message || "支付失败");
            var data = result.data || {};
            if (data.redirect && data.payment_url) {
                window.location.assign(data.payment_url);
                return;
            }
            toast(data.message || "支付成功");
            refreshView();
        }).catch(function (error) {
            button.disabled = false;
            toast(error.message || "网络错误，请稍后重试");
        });
    }

    function closeOrder(button) {
        var number = button.getAttribute("data-aksrt-order-cancel") || "";
        if (!number) return;
        if (button.getAttribute("data-aksrt-confirm") !== "true") {
            button.setAttribute("data-aksrt-confirm", "true");
            button.textContent = "确认关闭";
            return;
        }
        button.disabled = true;
        request(orderPath(number, "/cancel")).then(function (result) {
            if (!result.success) throw new Error(result.message || "关闭订单失败");
            toast("订单已关闭");
            refreshView();
        }).catch(function (error) {
            button.disabled = false;
            button.removeAttribute("data-aksrt-confirm");
            button.textContent = "关闭订单";
            toast(error.message || "网络错误，请稍后重试");
        });
    }

    function updateCountdowns() {
        page.querySelectorAll("[data-aksrt-order-countdown]").forEach(function (node) {
            var value = Math.max(0, Number(node.getAttribute("data-aksrt-order-countdown") || 0) - 1);
            node.setAttribute("data-aksrt-order-countdown", String(value));
            node.textContent = value ? "剩余支付时间 " + value + " 秒" : "订单即将关闭";
        });
    }

    page.addEventListener("click", function (event) {
        var filterToggle = event.target.closest("[data-aksrt-orders-filter-toggle]");
        if (filterToggle) {
            var panel = page.querySelector("[data-aksrt-orders-filter-panel]");
            var expanded = filterToggle.getAttribute("aria-expanded") === "true";
            filterToggle.setAttribute("aria-expanded", String(!expanded));
            if (panel) panel.hidden = expanded;
            return;
        }
        var detail = event.target.closest("[data-aksrt-order-detail]");
        if (detail) { openDetail(detail.getAttribute("data-aksrt-order-detail")); return; }
        if (event.target.closest("[data-aksrt-order-detail-close]")) { closeDetail(); return; }
        var pay = event.target.closest("[data-aksrt-order-pay]");
        if (pay) { startPayment(pay); return; }
        var cancel = event.target.closest("[data-aksrt-order-cancel]");
        if (cancel) closeOrder(cancel);
    });

    document.addEventListener("keydown", function (event) {
        if (event.key === "Escape" && detailModal && !detailModal.hidden) closeDetail();
    });
    window.setInterval(updateCountdowns, 1000);
}());