import { CheckCircleOutlined, CloseOutlined, CrownOutlined, RocketOutlined } from "@ant-design/icons";
import { useMemo, useState, type ReactNode } from "react";
import "../../styles/components/recharge-modal.css";
import { keyServerClient, type RechargeOrderResult } from "../../api/keyServerClient";
import { toast } from "../toast/toastStore";

type RechargeAudience = "personal" | "enterprise";
type PaymentMethod = "wechat" | "alipay" | "bank";

interface MembershipPlan {
  id: string;
  audience: RechargeAudience;
  name: string;
  subtitle: string;
  period: string;
  price: string;
  grant: string;
  comparisonLabel: string;
  badge?: string;
  icon: ReactNode;
  benefits: string[];
}

const membershipPlans: MembershipPlan[] = [
  {
    id: "pro-month",
    audience: "personal",
    name: "专业版",
    subtitle: "Pro",
    period: "月付",
    price: "299 元 / 月",
    grant: "每月赠送 10000 积分，30 天有效",
    comparisonLabel: "专业版基础权益",
    icon: <CrownOutlined />,
    benefits: ["通用大模型全解锁", "积分与 API 消耗 9 折", "并发提升到 3 个", "去水印、插队加速、专属客服"],
  },
  {
    id: "pro-quarter",
    audience: "personal",
    name: "专业版",
    subtitle: "Pro",
    period: "季付",
    price: "897 元 / 季",
    grant: "连续 3 个月按月发放 Pro 积分",
    comparisonLabel: "相比月付新增",
    badge: "季度",
    icon: <CrownOutlined />,
    benefits: ["一次覆盖 3 个月使用周期", "每月延续 Pro 权益", "适合短期项目排期"],
  },
  {
    id: "pro-year",
    audience: "personal",
    name: "专业版",
    subtitle: "Pro",
    period: "年付",
    price: "1990 元 / 年",
    grant: "全年合计 140000 积分，默认按月分摊",
    comparisonLabel: "相比季付新增",
    badge: "年费优惠",
    icon: <CrownOutlined />,
    benefits: ["折合 10 个月费用", "前 100 名额外赠 20000 积分", "适合全年持续高频使用"],
  },
  {
    id: "enterprise-month",
    audience: "enterprise",
    name: "企业版",
    subtitle: "Enterprise",
    period: "月付",
    price: "499 元 / 月",
    grant: "每月赠送 2000 积分，30 天有效",
    comparisonLabel: "企业版基础权益",
    icon: <RocketOutlined />,
    benefits: ["企业私有模型与高性能模型", "默认 10 并发，可申请提升", "积分与 API 消耗 8 折", "用量报表与正式 API 权限"],
  },
  {
    id: "enterprise-quarter",
    audience: "enterprise",
    name: "企业版",
    subtitle: "Enterprise",
    period: "季付",
    price: "1497 元 / 季",
    grant: "连续 3 个月按月发放企业版积分",
    comparisonLabel: "相比月付新增",
    badge: "季度",
    icon: <RocketOutlined />,
    benefits: ["一次覆盖季度项目周期", "延续企业资源池与高并发", "适合阶段性团队投放"],
  },
  {
    id: "enterprise-year",
    audience: "enterprise",
    name: "企业版",
    subtitle: "Enterprise",
    period: "年付",
    price: "4990 元 / 年",
    grant: "全年合计 340000 积分，默认按月分摊",
    comparisonLabel: "相比季付新增",
    badge: "企业年费",
    icon: <RocketOutlined />,
    benefits: ["折合 10 个月费用", "前 100 名额外赠 100000 积分", "支持对公充值与子账户额度分配"],
  },
];

const defaultSelectedPlanIds: Record<RechargeAudience, string> = {
  personal: "pro-month",
  enterprise: "enterprise-month",
};

const rechargeRules = [
  "充值比例：固定 1 元 = 100 积分，平台可限时活动额外赠送积分",
  "有效期：充值积分到账起有效期 12 个月，系统按先进先出自动消耗",
  "退费规则：充值积分到账后不支持退换、折现，仅限平台内消费",
];

const paymentMethods: Array<{ id: PaymentMethod; label: string; hint: string }> = [
  { id: "wechat", label: "微信支付", hint: "生成支付链接或二维码" },
  { id: "alipay", label: "支付宝", hint: "生成支付链接或二维码" },
  { id: "bank", label: "对公转账", hint: "企业客户可联系客服确认" },
];

export interface RechargeModalProps {
  open: boolean;
  onClose: () => void;
  currentBalance?: number;
}

export function RechargeModal({ open, onClose, currentBalance }: RechargeModalProps) {
  const [activeAudience, setActiveAudience] = useState<RechargeAudience>("personal");
  const [selectedPlanIds, setSelectedPlanIds] = useState<Record<RechargeAudience, string>>(defaultSelectedPlanIds);
  const [paymentMethod, setPaymentMethod] = useState<PaymentMethod>("wechat");
  const [submitting, setSubmitting] = useState(false);
  const [order, setOrder] = useState<RechargeOrderResult | null>(null);
  const visiblePlans = useMemo(() => membershipPlans.filter((plan) => plan.audience === activeAudience), [activeAudience]);
  const selectedPlanId = selectedPlanIds[activeAudience];
  const selectedPlan = membershipPlans.find((plan) => plan.id === selectedPlanId) ?? visiblePlans[0];

  const handlePlanSelect = (plan: MembershipPlan) => {
    setSelectedPlanIds((current) => ({
      ...current,
      [plan.audience]: plan.id,
    }));
    setOrder(null);
  };

  const handleCreateOrder = async () => {
    if (!selectedPlan || submitting) return;

    setSubmitting(true);
    try {
      const nextOrder = await keyServerClient.createRechargeOrder({ planId: selectedPlan.id, paymentMethod });
      setOrder(nextOrder);
      if (nextOrder.payUrl) {
        window.open(nextOrder.payUrl, "_blank", "noopener,noreferrer");
      }
      toast.success("充值订单已创建");
    } catch (error) {
      const message = error instanceof Error ? error.message : "订单创建失败，请联系客服处理。";
      toast.error(message);
      setOrder({
        orderId: `support-${Date.now()}`,
        status: "manual-review",
        message: "支付接口暂不可用，请通过页面联系方式联系客服完成充值。",
      });
    } finally {
      setSubmitting(false);
    }
  };

  if (!open) return null;

  return (
    <div className="recharge-modal" role="dialog" aria-modal="true" aria-labelledby="recharge-modal-title">
      <button type="button" className="recharge-modal__backdrop" onClick={onClose} aria-label="关闭充值弹窗" />
      <section className="recharge-modal__panel" aria-describedby="recharge-modal-desc">
        <div className="recharge-modal__promo" role="note">
          <strong>限时活动</strong>
          <span>年付套餐前 100 名额外赠送积分，季度套餐适合短期项目集中投放，充值积分有效期 12 个月。</span>
        </div>

        <header className="recharge-modal__header">
          <div>
            <span className="recharge-modal__eyebrow">会员与积分</span>
            <h2 id="recharge-modal-title">积分充值</h2>
            <p id="recharge-modal-desc">按个人或企业场景选择版本，重点展示相对左侧版本的新增权益。</p>
          </div>
          {currentBalance !== undefined ? (
            <span className="recharge-modal__balance">当前余额：{(currentBalance / 100).toFixed(2)} 积分</span>
          ) : null}
          <button type="button" className="recharge-modal__close" onClick={onClose} aria-label="关闭">
            <CloseOutlined />
          </button>
        </header>

        <div className="recharge-modal__audience-tabs" role="tablist" aria-label="充值对象">
          <button
            type="button"
            role="tab"
            aria-selected={activeAudience === "personal"}
            className={activeAudience === "personal" ? "is-active" : ""}
            onClick={() => setActiveAudience("personal")}
          >
            个人
          </button>
          <button
            type="button"
            role="tab"
            aria-selected={activeAudience === "enterprise"}
            className={activeAudience === "enterprise" ? "is-active" : ""}
            onClick={() => setActiveAudience("enterprise")}
          >
            企业
          </button>
        </div>

        <div className="recharge-modal__grid" data-audience={activeAudience}>
          {visiblePlans.map((plan) => {
            const isSelected = plan.id === selectedPlanId;

            return (
              <article
                key={plan.id}
                className={`recharge-modal__card recharge-modal__card--${plan.id}${isSelected ? " is-selected" : ""}`}
              >
                {plan.badge ? <span className="recharge-modal__badge">{plan.badge}</span> : null}
                <div className="recharge-modal__card-head">
                  <span className="recharge-modal__card-icon">{plan.icon}</span>
                  <div>
                    <h3>{plan.name}</h3>
                    <span>{plan.subtitle}</span>
                  </div>
                </div>
                <span className="recharge-modal__period">{plan.period}</span>
                <div className="recharge-modal__price">
                  <strong>{plan.price}</strong>
                </div>
                <p className="recharge-modal__grant">{plan.grant}</p>
                <span className="recharge-modal__diff-label">{plan.comparisonLabel}</span>
                <ul className="recharge-modal__features">
                  {plan.benefits.map((benefit) => (
                    <li key={benefit}>
                      <CheckCircleOutlined />
                      <span>{benefit}</span>
                    </li>
                  ))}
                </ul>
                <button
                  type="button"
                  className={`recharge-modal__buy${isSelected ? " is-selected" : ""}`}
                  aria-pressed={isSelected}
                  onClick={() => handlePlanSelect(plan)}
                >
                  {isSelected ? "当前方案" : "选择方案"}
                </button>
              </article>
            );
          })}
        </div>

        <footer className="recharge-modal__rules">
          <h3>积分充值规则</h3>
          <ol>
            {rechargeRules.map((rule) => (
              <li key={rule}>{rule}</li>
            ))}
          </ol>
        </footer>

        <section className="recharge-modal__checkout" aria-label="支付方式">
          <div>
            <span className="recharge-modal__checkout-eyebrow">支付确认</span>
            <h3>{selectedPlan.name} · {selectedPlan.period}</h3>
            <p>{selectedPlan.price}，{selectedPlan.grant}</p>
          </div>
          <div className="recharge-modal__payment-methods" role="radiogroup" aria-label="选择支付方式">
            {paymentMethods.map((method) => (
              <button
                key={method.id}
                type="button"
                role="radio"
                aria-checked={paymentMethod === method.id}
                className={paymentMethod === method.id ? "is-active" : ""}
                onClick={() => {
                  setPaymentMethod(method.id);
                  setOrder(null);
                }}
              >
                <strong>{method.label}</strong>
                <span>{method.hint}</span>
              </button>
            ))}
          </div>
          <button type="button" className="recharge-modal__pay" onClick={() => void handleCreateOrder()} disabled={submitting}>
            {submitting ? "创建订单中..." : "立即充值"}
          </button>
          {order ? (
            <div className="recharge-modal__order" role="status">
              <strong>订单号：{order.orderId}</strong>
              <span>状态：{order.status}</span>
              {order.qrCodeUrl ? <img src={order.qrCodeUrl} alt="支付二维码" /> : null}
              {order.payUrl ? <a href={order.payUrl} target="_blank" rel="noreferrer">打开支付链接</a> : null}
              <p>{order.message || "支付完成后积分将自动入账，如长时间未到账请联系客服。"}</p>
            </div>
          ) : null}
        </section>
      </section>
    </div>
  );
}