(() => {
    const $ = (sel) => document.querySelector(sel);
    const rechargeOptionListEl = $('#rechargeOptionList') || $('#planList');
    const estimateBoxEl = $('#estimateBox');
    const resultBoxEl = $('#orderResultBox');
    const holderNameEl = $('#holderName');
    const customInitialBalanceEl = $('#customInitialBalance') || $('#initialBalance');
    const customRechargeBoxEl = $('#customRechargeBox');
    const submitBtn = $('#submitOrderBtn');

    const HOLDER_NAME_PATTERN = /^[A-Za-z][A-Za-z .,'()&@/_\-+]*$/;

    const state = {
        rechargeOptions: [5, 10, 15, 20],
        selectedAmount: 5,
        customMode: false
    };

        if (!rechargeOptionListEl || !estimateBoxEl || !resultBoxEl || !holderNameEl || !customInitialBalanceEl || !submitBtn) {
        console.error('[ic-card-order] Missing required DOM nodes', {
            rechargeOptionListEl: !!rechargeOptionListEl,
            estimateBoxEl: !!estimateBoxEl,
            resultBoxEl: !!resultBoxEl,
            holderNameEl: !!holderNameEl,
            customInitialBalanceEl: !!customInitialBalanceEl,
                customRechargeBoxEl: !!customRechargeBoxEl,
            submitBtn: !!submitBtn
        });
        return;
    }

    const api = {
        async request(url, opts = {}) {
            const res = await fetch(url, opts);
            const data = await res.json().catch(() => ({}));
            if (!res.ok || data.ok === false) {
                throw new Error(data.error || res.statusText || '请求失败');
            }
            return data;
        },
        fetchConfig() {
            return api.request('/api/public/ic-cards/config');
        },
        createOrder(payload) {
            return api.request('/api/public/ic-cards/orders', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(payload)
            });
        }
    };

    const escapeHtml = (value) => String(value == null ? '' : value)
        .replace(/&/g, '&')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#39;');

    const getInitialBalance = () => {
        if (state.customMode) {
            return Math.max(1, Number(customInitialBalanceEl.value || 0) || 0);
        }
        return Math.max(1, Number(state.selectedAmount || 0) || 0);
    };

    const renderRechargeOptions = () => {
        const options = Array.isArray(state.rechargeOptions) && state.rechargeOptions.length
            ? state.rechargeOptions
            : [5, 10, 15, 20];
        rechargeOptionListEl.innerHTML = options.map((amount) => `
            <div class="jr-card-plan ${!state.customMode && Number(state.selectedAmount) === Number(amount) ? 'is-active' : ''}" data-amount="${escapeHtml(amount)}">
                <span class="jr-card-plan-title">${escapeHtml(amount)}</span>
                <span class="jr-card-plan-desc">首次充值 ${escapeHtml(amount)}</span>
            </div>
        `).join('') + `
            <div class="jr-card-plan jr-card-plan-compact ${state.customMode ? 'is-active' : ''}" data-custom="true">
                <span class="jr-card-plan-title">自定义</span>
                <span class="jr-card-plan-desc">手动输入首次充值金额</span>
            </div>
        `;
        if (customRechargeBoxEl) {
            customRechargeBoxEl.classList.toggle('is-active', !!state.customMode);
        }
        rechargeOptionListEl.querySelectorAll('[data-amount]').forEach((button) => {
            button.addEventListener('click', () => {
                state.customMode = false;
                state.selectedAmount = Number(button.getAttribute('data-amount')) || 5;
                customInitialBalanceEl.disabled = true;
                renderRechargeOptions();
                renderEstimate();
            });
        });
        const customBtn = rechargeOptionListEl.querySelector('[data-custom="true"]');
        if (customBtn) {
            customBtn.addEventListener('click', () => {
                state.customMode = true;
                customInitialBalanceEl.disabled = false;
                customInitialBalanceEl.focus();
                if (!customInitialBalanceEl.value) customInitialBalanceEl.value = '25';
                renderRechargeOptions();
                renderEstimate();
            });
        }
    };

    const syncLegacyDom = () => {
        const holderPhoneEl = $('#holderPhone');
        const orderNoteEl = $('#orderNote');
        if (holderPhoneEl) {
            holderPhoneEl.disabled = true;
            holderPhoneEl.value = '';
            holderPhoneEl.placeholder = '已停用';
            holderPhoneEl.style.display = 'none';
        }
        if (orderNoteEl) {
            orderNoteEl.disabled = true;
            orderNoteEl.value = '';
            orderNoteEl.placeholder = '已停用';
            orderNoteEl.style.display = 'none';
        }
        const createTypeSelect = $('#createType');
        if (createTypeSelect) {
            createTypeSelect.disabled = true;
            createTypeSelect.style.display = 'none';
        }
    };

    const validateHolderName = (value) => {
        const holderName = String(value || '').trim();
        if (!holderName) return '请输入持卡人姓名';
        if (holderName.length > 24) return '持卡人姓名不能超过 24 个字符';
        if (!HOLDER_NAME_PATTERN.test(holderName)) return '持卡人姓名仅支持英文与常用符号';
        return '';
    };

    const validateInitialBalance = () => {
        const initialBalance = getInitialBalance();
        if (!Number.isFinite(initialBalance) || initialBalance < 1) {
            return '首次充值金额必须大于 0';
        }
        return '';
    };

    const renderEstimate = () => {
        const initialBalance = getInitialBalance();
        if (!Number.isFinite(initialBalance) || initialBalance < 1) {
            estimateBoxEl.innerHTML = '<div class="jr-center-empty"><p>请选择有效的首次充值金额。</p></div>';
            return;
        }
        estimateBoxEl.innerHTML = `
            <div class="list-item"><span class="k">卡片类型</span><span class="v">IC 储值卡</span></div>
            <div class="list-item"><span class="k">首次充值</span><span class="v">${escapeHtml(initialBalance)}</span></div>
            <div class="list-item"><span class="k">持卡人限制</span><span class="v">仅英文与常用符号</span></div>
            <div class="list-item jr-total-row"><span class="k">预计金额</span><span class="v jr-total-amount">${escapeHtml(initialBalance)}</span></div>
        `;
    };

    const renderResult = (data) => {
        if (!data) {
            resultBoxEl.className = 'jr-center-empty';
            resultBoxEl.innerHTML = '<p>提交后将在此显示卡号、凭证码和领卡提示。</p>';
            return;
        }
        const isDomain = location.hostname.includes('fse-media.group');
        const voucherCode = data.code || data.voucher_code || data.order_code || '---';
        const cardStatus = String(data.card?.status || data.status || '').trim().toLowerCase();
        const lookupKey = (cardStatus === 'pending_pickup')
            ? voucherCode
            : (data.card?.card_id || data.card_id || voucherCode);
        const searchHref = isDomain
            ? `https://ticket.fse-media.group/ic-card/search?q=${encodeURIComponent(lookupKey)}`
            : `/ic-card-search.html?q=${encodeURIComponent(lookupKey)}`;
        const detailHref = isDomain
            ? `https://ticket.fse-media.group/ic/${encodeURIComponent(lookupKey)}`
            : `/ic/${encodeURIComponent(lookupKey)}`;
        const shownCardId = data.display_card_id || data.card?.display_card_id || data.card_id || '---';
        const amount = Number(data.amount ?? data.card?.purchase_amount ?? data.card?.balance ?? getInitialBalance()) || getInitialBalance();
        resultBoxEl.className = '';
        resultBoxEl.innerHTML = `
            <div class="jr-redeem-summary jr-card-order-result">
                <div class="jr-kicker">ORDER CREATED</div>
                <div class="jr-redeem-code-row">
                    <span class="jr-redeem-code-label">凭证码</span>
                    <strong class="jr-redeem-code-value">${escapeHtml(voucherCode)}</strong>
                </div>
                <div class="jr-redeem-code-row" style="margin-top:12px;">
                    <span class="jr-redeem-code-label">卡号</span>
                    <strong class="jr-redeem-code-value jr-code-accent-secondary">${escapeHtml(shownCardId)}</strong>
                </div>
                <div class="jr-order-info-grid">
                    <div class="jr-order-info-item">
                        <span>首次充值</span>
                        <strong>${escapeHtml(amount)}</strong>
                    </div>
                    <div class="jr-order-info-item">
                        <span>当前状态</span>
                        <strong class="jr-code-accent-status">待领卡</strong>
                    </div>
                </div>
                <p class="jr-redeem-copy">购卡信息已生成。请保存卡号与凭证码，前往站内办理领卡或后续状态查询。</p>
                <div class="jr-action-row">
                    <a class="btn jr-secondary-btn" href="${detailHref}"><i class="fas fa-id-card"></i> 卡片详情</a>
                    <a class="btn jr-secondary-btn" href="${searchHref}"><i class="fas fa-search"></i> 查询此卡</a>
                </div>
            </div>
        `;
    };

    const submitOrder = async () => {
        const holderNameError = validateHolderName(holderNameEl.value);
        if (holderNameError) {
            alert(holderNameError);
            return;
        }
        const balanceError = validateInitialBalance();
        if (balanceError) {
            alert(balanceError);
            return;
        }
        const payload = {
            holder_name: holderNameEl.value.trim(),
            initial_balance: getInitialBalance()
        };
        submitBtn.disabled = true;
        try {
            const data = await api.createOrder(payload);
            renderResult(data);
            alert(`购卡成功，凭证码：${data.code}`);
        } finally {
            submitBtn.disabled = false;
        }
    };

    customInitialBalanceEl.addEventListener('input', renderEstimate);
    submitBtn.addEventListener('click', () => submitOrder().catch((error) => alert(error.message || String(error))));

    (async () => {
        syncLegacyDom();
        const data = await api.fetchConfig();
        state.rechargeOptions = (data.recharge_options || data.initial_balance_options || [5, 10, 15, 20])
            .map((value) => Number(value) || 0)
            .filter((value) => value > 0);
        state.selectedAmount = state.rechargeOptions[0] || 5;
        customInitialBalanceEl.disabled = true;
        if (customRechargeBoxEl) customRechargeBoxEl.classList.remove('is-active');
        renderRechargeOptions();
        renderEstimate();
        renderResult(null);
    })().catch((error) => {
        rechargeOptionListEl.innerHTML = `<div class="jr-center-empty"><p>${escapeHtml(error.message || String(error))}</p></div>`;
        estimateBoxEl.innerHTML = '<div class="jr-center-empty"><p>配置加载失败。</p></div>';
    });
})();