"use client"

import type React from "react"
import { useState, useEffect, useCallback, useRef } from "react"
import { X, CheckCircle, Bitcoin, Globe, Copy, Check, QrCode, Shield, Users, Loader2, AlertCircle } from "lucide-react"
import { useStore } from "@/lib/store"
import QRCode from "qrcode"

const WechatIcon = () => (
  <svg viewBox="0 0 24 24" className="w-5 h-5" fill="currentColor">
    <path d="M8.691 2.188C3.891 2.188 0 5.476 0 9.53c0 2.212 1.17 4.203 3.002 5.55a.59.59 0 0 1 .213.665l-.39 1.48c-.019.07-.048.141-.048.213 0 .163.13.295.29.295a.326.326 0 0 0 .167-.054l1.903-1.114a.864.864 0 0 1 .717-.098 10.16 10.16 0 0 0 2.837.403c.276 0 .543-.027.811-.05-.857-2.578.157-4.972 1.932-6.446 1.703-1.415 3.882-1.98 5.853-1.838-.576-3.583-4.196-6.348-8.596-6.348zM5.785 5.991c.642 0 1.162.529 1.162 1.18a1.17 1.17 0 0 1-1.162 1.178A1.17 1.17 0 0 1 4.623 7.17c0-.651.52-1.18 1.162-1.18zm5.813 0c.642 0 1.162.529 1.162 1.18a1.17 1.17 0 0 1-1.162 1.178 1.17 1.17 0 0 1-1.162-1.178c0-.651.52-1.18 1.162-1.18zm5.34 2.867c-1.797-.052-3.746.512-5.28 1.786-1.72 1.428-2.687 3.72-1.78 6.22.942 2.453 3.666 4.229 6.884 4.229.826 0 1.622-.12 2.361-.336a.722.722 0 0 1 .598.082l1.584.926a.272.272 0 0 0 .14.047c.134 0 .24-.111.24-.247 0-.06-.023-.12-.038-.177l-.327-1.233a.582.582 0 0 1-.023-.156.49.49 0 0 1 .201-.398C23.024 18.48 24 16.82 24 14.98c0-3.21-2.931-5.837-6.656-6.088V8.89c-.135-.01-.269-.03-.406-.03zm-2.53 3.274c.535 0 .969.44.969.982a.976.976 0 0 1-.969.983.976.976 0 0 1-.969-.983c0-.542.434-.982.97-.982zm4.844 0c.535 0 .969.44.969.982a.976.976 0 0 1-.969.983.976.976 0 0 1-.969-.983c0-.542.434-.982.969-.982z" />
  </svg>
)


type PaymentMethod = "wechat" | "alipay" | "usdt" | "paypal" | "stripe" | "bank"

interface PaymentModalProps {
  isOpen: boolean
  onClose: () => void
  type: "section" | "fullbook"
  sectionId?: string
  sectionTitle?: string
  amount: number
  onSuccess: () => void
}

// 支付状态类型
type PaymentState = "idle" | "creating" | "paying" | "polling" | "success" | "error"

export function PaymentModal({ isOpen, onClose, type, sectionId, sectionTitle, amount, onSuccess }: PaymentModalProps) {
  const [paymentMethod, setPaymentMethod] = useState<PaymentMethod>("wechat")
  const [paymentState, setPaymentState] = useState<PaymentState>("idle")
  const [errorMessage, setErrorMessage] = useState("")
  const [showQRCode, setShowQRCode] = useState(false)
  const [qrCodeDataUrl, setQrCodeDataUrl] = useState("")
  const [paymentUrl, setPaymentUrl] = useState("")
  const [orderSn, setOrderSn] = useState("")
  const [tradeSn, setTradeSn] = useState("")
  const [currentGateway, setCurrentGateway] = useState("") // 当前支付网关
  const [copied, setCopied] = useState(false)
  
  const pollingRef = useRef<NodeJS.Timeout | null>(null)
  const pollingCountRef = useRef(0)

  const { purchaseSection, purchaseFullBook, user, settings } = useStore()

  const paymentConfig = settings?.paymentMethods || {
    wechat: { enabled: true, qrCode: "", account: "", groupQrCode: "" },
    alipay: { enabled: true, qrCode: "", account: "" },
    usdt: { enabled: true, network: "TRC20", address: "", exchangeRate: 7.2 },
    paypal: { enabled: false, email: "", exchangeRate: 7.2 },
  }

  const usdtAmount = (amount / (paymentConfig.usdt?.exchangeRate || 7.2)).toFixed(2)
  const paypalAmount = (amount / (paymentConfig.paypal?.exchangeRate || 7.2)).toFixed(2)

  // 清理轮询
  const clearPolling = useCallback(() => {
    if (pollingRef.current) {
      clearInterval(pollingRef.current)
      pollingRef.current = null
    }
    pollingCountRef.current = 0
  }, [])

  // 重置状态
  const resetState = useCallback(() => {
    setPaymentState("idle")
    setShowQRCode(false)
    setQrCodeDataUrl("")
    setPaymentUrl("")
    setOrderSn("")
    setTradeSn("")
    setCurrentGateway("")
    setErrorMessage("")
    clearPolling()
  }, [clearPolling])

  useEffect(() => {
    if (isOpen) {
      resetState()
    }
    return () => {
      clearPolling()
    }
  }, [isOpen, resetState, clearPolling])

  // 创建订单并获取支付参数
  const createPaymentOrder = async () => {
    setPaymentState("creating")
    setErrorMessage("")

    try {
      const response = await fetch("/api/payment/create-order", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          userId: user?.id || "anonymous",
          type,
          sectionId,
          sectionTitle,
          amount,
          paymentMethod,
          referralCode: user?.referredBy,
        }),
      })

      const result = await response.json()

      if (result.code !== 200) {
        throw new Error(result.message || "创建订单失败")
      }

      const { orderSn: newOrderSn, tradeSn: newTradeSn, paymentData, gateway } = result.data

      setOrderSn(newOrderSn)
      setTradeSn(newTradeSn)
      
      // 保存网关信息用于后续查询
      const gatewayId = gateway || (paymentMethod === "wechat" ? "wechat_native" : "alipay_wap")
      setCurrentGateway(gatewayId)

      // 根据支付方式处理不同的返回数据
      if (paymentData.type === "url") {
        // URL类型：跳转支付（支付宝WAP/WEB）
        setPaymentUrl(paymentData.payload)
        setShowQRCode(true)
        setPaymentState("paying")
        
        // 打开支付页面
        window.open(paymentData.payload, "_blank")
        
        // 开始轮询支付状态，传递网关信息
        startPolling(newTradeSn, gatewayId)
      } else if (paymentData.type === "qrcode") {
        // 二维码类型：扫码支付（微信Native/支付宝QR）
        const qrUrl = paymentData.payload
        
        // 生成二维码图片
        const dataUrl = await QRCode.toDataURL(qrUrl, {
          width: 200,
          margin: 2,
          color: {
            dark: "#000000",
            light: "#ffffff",
          },
        })
        
        setQrCodeDataUrl(dataUrl)
        setPaymentUrl(qrUrl)
        setShowQRCode(true)
        setPaymentState("paying")
        
        // 开始轮询支付状态，传递网关信息
        startPolling(newTradeSn, gatewayId)
      } else if (paymentData.type === "json") {
        // JSON类型：JSAPI支付（需要调用JS SDK）
        console.log("JSAPI支付参数:", paymentData.payload)
        // 这里需要调用微信JS SDK
        setPaymentState("error")
        setErrorMessage("JSAPI支付需要在微信内打开")
      }
    } catch (error) {
      console.error("创建订单失败:", error)
      setPaymentState("error")
      setErrorMessage(error instanceof Error ? error.message : "创建订单失败，请重试")
    }
  }

  // 轮询支付状态
  const startPolling = (tradeSnToQuery: string, gateway?: string) => {
    setPaymentState("polling")
    pollingCountRef.current = 0

    pollingRef.current = setInterval(async () => {
      pollingCountRef.current++

      // 最多轮询60次（5分钟）
      if (pollingCountRef.current > 60) {
        clearPolling()
        setPaymentState("error")
        setErrorMessage("支付超时，请重新发起支付")
        return
      }

      try {
        // 构建查询URL，包含网关参数以提高查询准确性
        let queryUrl = `/api/payment/query?tradeSn=${tradeSnToQuery}`
        if (gateway) {
          queryUrl += `&gateway=${gateway}`
        }
        
        const response = await fetch(queryUrl)
        const result = await response.json()

        if (result.code === 200 && result.data) {
          const { status } = result.data

          if (status === "paid") {
            // 支付成功
            clearPolling()
            await handlePaymentSuccess()
          } else if (status === "closed" || status === "refunded") {
            // 订单已关闭
            clearPolling()
            setPaymentState("error")
            setErrorMessage("订单已关闭")
          }
          // paying状态继续轮询
        }
      } catch (error) {
        console.error("查询支付状态失败:", error)
        // 查询失败继续轮询
      }
    }, 5000) // 每5秒查询一次
  }

  // 处理支付成功
  const handlePaymentSuccess = async () => {
    setPaymentState("success")

    // 调用store更新购买状态
    let success = false
    if (type === "section" && sectionId) {
      success = await purchaseSection(sectionId, sectionTitle, paymentMethod)
    } else if (type === "fullbook") {
      success = await purchaseFullBook(paymentMethod)
    }

    // 打开社群二维码
    const groupUrl = paymentConfig.wechat?.groupQrCode
    if (groupUrl) {
      setTimeout(() => {
        window.open(groupUrl, "_blank")
      }, 800)
    }

    // 关闭弹窗
    setTimeout(() => {
      onSuccess()
      onClose()
      resetState()
    }, 2500)
  }

  // 手动确认支付（用于轮询失效的情况）
  const handleManualConfirm = async () => {
    if (!tradeSn) return

    setPaymentState("polling")

    try {
      // 构建查询URL，包含网关参数
      let queryUrl = `/api/payment/query?tradeSn=${tradeSn}`
      if (currentGateway) {
        queryUrl += `&gateway=${currentGateway}`
      }
      
      const response = await fetch(queryUrl)
      const result = await response.json()

      if (result.code === 200 && result.data?.status === "paid") {
        await handlePaymentSuccess()
      } else {
        setErrorMessage("未检测到支付，请确认是否已完成支付")
        setPaymentState("paying")
      }
    } catch (error) {
      setErrorMessage("查询支付状态失败，请稍后重试")
      setPaymentState("paying")
    }
  }

  const handleCopyAddress = (address: string) => {
    navigator.clipboard.writeText(address)
    setCopied(true)
    setTimeout(() => setCopied(false), 2000)
  }

  // 处理开始支付
  const handlePayment = async () => {
    // USDT和PayPal使用旧的手动确认流程
    if (paymentMethod === "usdt" || paymentMethod === "paypal") {
      setShowQRCode(true)
      return
    }

    // 微信和支付宝使用新的API流程
    await createPaymentOrder()
  }

  // USDT/PayPal手动确认
  const handleCryptoConfirm = async () => {
    setPaymentState("creating")
    
    // 模拟确认支付（实际需要人工审核）
    await new Promise((resolve) => setTimeout(resolve, 1000))

    let success = false
    if (type === "section" && sectionId) {
      success = await purchaseSection(sectionId, sectionTitle, paymentMethod)
    } else if (type === "fullbook") {
      success = await purchaseFullBook(paymentMethod)
    }

    if (success) {
      await handlePaymentSuccess()
    } else {
      setPaymentState("error")
      setErrorMessage("确认支付失败，请联系客服")
    }
  }

  if (!isOpen) return null

  const paymentMethods: {
    id: PaymentMethod
    name: string
    icon: React.ReactNode
    color: string
    iconBg: string
    enabled: boolean
    extra?: string
  }[] = [
    {
      id: "wechat",
      name: "微信支付",
      icon: <WechatIcon />,
      color: "#07C160",
      iconBg: "rgba(7, 193, 96, 0.15)",
      enabled: paymentConfig.wechat?.enabled ?? true,
    },
    {
      id: "usdt",
      name: `USDT (${paymentConfig.usdt?.network || "TRC20"})`,
      icon: <Bitcoin className="w-5 h-5" />,
      color: "#26A17B",
      iconBg: "rgba(38, 161, 123, 0.15)",
      enabled: paymentConfig.usdt?.enabled ?? false,
      extra: `≈ $${usdtAmount}`,
    },
    {
      id: "paypal",
      name: "PayPal",
      icon: <Globe className="w-5 h-5" />,
      color: "#003087",
      iconBg: "rgba(0, 48, 135, 0.15)",
      enabled: paymentConfig.paypal?.enabled ?? false,
      extra: `≈ $${paypalAmount}`,
    },
  ]

  const availableMethods = paymentMethods.filter((m) => m.enabled)

  // 二维码/详情页面
  if (showQRCode) {
    const isCrypto = paymentMethod === "usdt"
    const isPaypal = paymentMethod === "paypal"
    const isWechat = paymentMethod === "wechat"
    const isAlipay = paymentMethod === "alipay"

    let address = ""
    let displayAmount = `¥${amount.toFixed(2)}`
    let title = "扫码支付"
    let hint = "支付完成后，系统将自动确认"

    if (isCrypto) {
      address = paymentConfig.usdt?.address || ""
      displayAmount = `$${usdtAmount} USDT`
      title = "USDT支付"
      hint = "请转账到以下地址，完成后点击确认"
    } else if (isPaypal) {
      address = paymentConfig.paypal?.email || ""
      displayAmount = `$${paypalAmount} USD`
      title = "PayPal支付"
      hint = "请转账到以下PayPal账户"
    } else if (isWechat) {
      title = "微信支付"
      hint = "请使用微信扫描二维码支付"
    } else if (isAlipay) {
      title = "支付宝支付"
      hint = paymentUrl?.startsWith("http") ? "已打开支付页面，请在新窗口完成支付" : "请使用支付宝扫描二维码支付"
    }

    return (
      <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center">
        <div className="absolute inset-0 bg-black/60 backdrop-blur-md modal-overlay" onClick={onClose} />
        <div className="relative w-full sm:max-w-md glass-modal overflow-hidden safe-bottom modal-content sm:m-4">
          {/* 顶部把手 - 仅移动端 */}
          <div className="flex justify-center pt-3 pb-2 sm:hidden">
            <div className="w-9 h-1 rounded-full bg-[var(--app-text-tertiary)]" />
          </div>
          
          <button 
            onClick={onClose} 
            className="absolute top-4 right-4 w-8 h-8 rounded-full bg-[var(--app-bg-secondary)] flex items-center justify-center text-[var(--app-text-secondary)] hover:text-white z-10 touch-feedback"
          >
            <X className="w-4 h-4" />
          </button>

          <div className="p-6 pt-4 sm:pt-10">
            {/* 标题 */}
            <h3 className="text-xl font-semibold text-white text-center mb-2">{title}</h3>
            
            {/* 金额显示 */}
            <div className="text-center mb-6">
              <p className="text-4xl font-bold text-[var(--app-brand)] glow-text">{displayAmount}</p>
            </div>

            {/* 错误提示 */}
            {errorMessage && (
              <div className="glass-card p-4 mb-4 border-red-500/30">
                <div className="flex items-center gap-3 text-red-400">
                  <AlertCircle className="w-5 h-5 flex-shrink-0" />
                  <p className="text-sm">{errorMessage}</p>
                </div>
              </div>
            )}

            {/* QR Code Display - 微信/支付宝 */}
            {(isWechat || isAlipay) && (
              <div className="flex flex-col items-center mb-6">
                <div className="w-52 h-52 bg-white rounded-2xl p-4 mb-4 flex items-center justify-center shadow-lg">
                  {paymentState === "creating" ? (
                    <div className="flex flex-col items-center text-gray-400">
                      <Loader2 className="w-12 h-12 animate-spin mb-2 text-[var(--app-brand)]" />
                      <span className="text-sm text-gray-600">正在生成二维码...</span>
                    </div>
                  ) : qrCodeDataUrl ? (
                    <img
                      src={qrCodeDataUrl}
                      alt="支付二维码"
                      className="w-full h-full object-contain rounded-lg"
                    />
                  ) : paymentUrl?.startsWith("http") ? (
                    <div className="flex flex-col items-center text-gray-600">
                      <CheckCircle className="w-12 h-12 text-green-500 mb-2" />
                      <span className="text-sm text-center">已在新窗口打开支付页面</span>
                    </div>
                  ) : (
                    <div className="flex flex-col items-center text-gray-400">
                      <QrCode className="w-16 h-16 mb-2" />
                      <span className="text-sm text-center">二维码加载中...</span>
                    </div>
                  )}
                </div>
                <p className="text-[var(--app-text-tertiary)] text-sm">{hint}</p>
                
                {/* 轮询状态指示 */}
                {paymentState === "polling" && (
                  <div className="flex items-center gap-2 mt-3 text-[var(--app-brand)]">
                    <Loader2 className="w-4 h-4 animate-spin" />
                    <span className="text-sm">正在等待支付结果...</span>
                  </div>
                )}
              </div>
            )}

            {/* Crypto/PayPal Address */}
            {(isCrypto || isPaypal) && (
              <div className="mb-6">
                <div className="glass-card p-4">
                  <p className="text-[var(--app-text-tertiary)] text-xs mb-2">
                    {isCrypto ? `收款地址 (${paymentConfig.usdt?.network})` : "PayPal账户"}
                  </p>
                  <div className="flex items-center gap-2">
                    <p className="text-white text-sm break-all flex-1 font-mono bg-[var(--app-bg-secondary)] p-3 rounded-lg">
                      {address || "请在后台配置收款地址"}
                    </p>
                    {address && (
                      <button
                        onClick={() => handleCopyAddress(address)}
                        className="w-10 h-10 rounded-xl bg-[var(--app-brand-light)] flex items-center justify-center text-[var(--app-brand)] touch-feedback"
                      >
                        {copied ? <Check className="w-5 h-5" /> : <Copy className="w-5 h-5" />}
                      </button>
                    )}
                  </div>
                </div>
                <p className="text-[var(--app-text-tertiary)] text-sm mt-3 text-center">{hint}</p>
              </div>
            )}

            {/* 提示信息 */}
            <div className="glass-card p-4 mb-6 border-[var(--app-brand)]/20">
              <div className="flex items-center gap-3">
                <div className="w-10 h-10 rounded-xl bg-[var(--app-brand-light)] flex items-center justify-center">
                  <Shield className="w-5 h-5 text-[var(--app-brand)]" />
                </div>
                <p className="text-[var(--app-text-secondary)] text-sm flex-1">
                  支付完成后，系统将自动开通阅读权限
                </p>
              </div>
            </div>

            {/* Action Buttons */}
            <div className="flex gap-3">
              <button
                onClick={() => {
                  clearPolling()
                  setShowQRCode(false)
                  setPaymentState("idle")
                  setErrorMessage("")
                }}
                className="btn-ios-secondary flex-1"
              >
                返回
              </button>
              {(isCrypto || isPaypal) ? (
                <button
                  onClick={handleCryptoConfirm}
                  disabled={paymentState === "creating"}
                  className="btn-ios flex-1 glow disabled:opacity-50"
                >
                  {paymentState === "creating" ? (
                    <div className="flex items-center justify-center gap-2">
                      <Loader2 className="w-4 h-4 animate-spin" />
                      处理中...
                    </div>
                  ) : (
                    "我已支付"
                  )}
                </button>
              ) : (
                <button
                  onClick={handleManualConfirm}
                  disabled={paymentState === "polling"}
                  className="btn-ios flex-1 glow disabled:opacity-50"
                >
                  {paymentState === "polling" ? (
                    <div className="flex items-center justify-center gap-2">
                      <Loader2 className="w-4 h-4 animate-spin" />
                      查询中...
                    </div>
                  ) : (
                    "已完成支付"
                  )}
                </button>
              )}
            </div>
          </div>
        </div>
      </div>
    )
  }

  // 支付成功页面
  if (paymentState === "success") {
    return (
      <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
        <div className="absolute inset-0 bg-black/60 backdrop-blur-md modal-overlay" />
        <div className="relative w-full max-w-sm glass-modal overflow-hidden modal-content">
          <div className="p-8 text-center">
            {/* 成功动画 */}
            <div className="w-24 h-24 mx-auto mb-6 rounded-full bg-[var(--app-brand-light)] flex items-center justify-center">
              <CheckCircle className="w-12 h-12 text-[var(--app-brand)]" />
            </div>
            <h3 className="text-2xl font-semibold text-white mb-2">支付成功</h3>
            <p className="text-[var(--app-text-secondary)] mb-4">
              {type === "fullbook" ? "您已解锁全部内容" : "您已解锁本节内容"}
            </p>
            {paymentConfig.wechat?.groupQrCode && (
              <div className="glass-card p-4 mt-4">
                <div className="flex items-center justify-center gap-2 text-[#07C160]">
                  <Users className="w-5 h-5" />
                  <span className="text-sm">正在跳转到读者社群...</span>
                </div>
              </div>
            )}
          </div>
        </div>
      </div>
    )
  }

  // 主支付选择页面
  return (
    <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center">
      <div className="absolute inset-0 bg-black/60 backdrop-blur-md modal-overlay" onClick={onClose} />
      <div className="relative w-full sm:max-w-md glass-modal overflow-hidden safe-bottom modal-content sm:m-4 max-h-[90vh] overflow-y-auto scrollbar-hide">
        {/* 顶部把手 - 仅移动端 */}
        <div className="flex justify-center pt-3 pb-2 sm:hidden sticky top-0 bg-transparent">
          <div className="w-9 h-1 rounded-full bg-[var(--app-text-tertiary)]" />
        </div>

        <button
          onClick={onClose}
          className="absolute top-4 right-4 w-8 h-8 rounded-full bg-[var(--app-bg-secondary)] flex items-center justify-center text-[var(--app-text-secondary)] hover:text-white z-10 touch-feedback"
        >
          <X className="w-4 h-4" />
        </button>

        {/* Header */}
        <div className="px-6 pt-2 sm:pt-10 pb-4">
          <h3 className="text-xl font-semibold text-white mb-1">确认支付</h3>
          <p className="text-[var(--app-text-tertiary)] text-sm">
            {type === "fullbook" ? "购买整本书，解锁全部内容" : `购买: ${sectionTitle}`}
          </p>
        </div>

        {/* Amount */}
        <div className="px-6 py-6 text-center border-y border-[var(--app-separator)]">
          <p className="text-[var(--app-text-tertiary)] text-sm mb-2">支付金额</p>
          <p className="text-5xl font-bold text-white">¥{amount.toFixed(2)}</p>
          {(paymentMethod === "usdt" || paymentMethod === "paypal") && (
            <p className="text-[var(--app-brand)] text-sm mt-2">
              ≈ ${paymentMethod === "usdt" ? usdtAmount : paypalAmount} USD
            </p>
          )}
          {user?.referredBy && (
            <div className="inline-flex items-center gap-2 mt-4 px-4 py-2 rounded-full bg-[var(--app-brand-light)]">
              <Users className="w-4 h-4 text-[var(--app-brand)]" />
              <span className="text-[var(--app-brand)] text-sm">
                推荐人将获得 {settings?.distributorShare || 90}% 返佣
              </span>
            </div>
          )}
        </div>

        {/* Payment Methods */}
        <div className="p-6">
          <p className="text-[var(--app-text-tertiary)] text-sm mb-4">选择支付方式</p>
          <div className="space-y-3">
            {availableMethods.map((method) => (
              <button
                key={method.id}
                onClick={() => setPaymentMethod(method.id)}
                className={`w-full p-4 rounded-xl flex items-center gap-4 transition-all touch-feedback ${
                  paymentMethod === method.id
                    ? "glass-card-light border-[var(--app-brand)]/30"
                    : "glass-card hover:border-[var(--glass-border-light)]"
                }`}
              >
                <div 
                  className="w-12 h-12 rounded-xl flex items-center justify-center"
                  style={{ backgroundColor: method.iconBg, color: method.color }}
                >
                  {method.icon}
                </div>
                <div className="flex-1 text-left">
                  <span className="text-white font-medium">{method.name}</span>
                  {method.extra && (
                    <span className="text-[var(--app-text-tertiary)] text-sm ml-2">{method.extra}</span>
                  )}
                </div>
                {paymentMethod === method.id && (
                  <div className="w-6 h-6 rounded-full bg-[var(--app-brand)] flex items-center justify-center">
                    <Check className="w-4 h-4 text-white" />
                  </div>
                )}
              </button>
            ))}
            {availableMethods.length === 0 && (
              <p className="text-[var(--app-text-tertiary)] text-center py-8">暂无可用支付方式</p>
            )}
          </div>
        </div>

        {/* Submit Button */}
        <div className="p-6 pt-0">
          <button
            onClick={handlePayment}
            disabled={paymentState === "creating" || availableMethods.length === 0}
            className="btn-ios w-full glow text-lg disabled:opacity-50"
          >
            {paymentState === "creating" ? (
              <div className="flex items-center justify-center gap-2">
                <Loader2 className="w-5 h-5 animate-spin" />
                正在创建订单...
              </div>
            ) : (
              `确认支付 ¥${amount.toFixed(2)}`
            )}
          </button>
          <p className="text-[var(--app-text-tertiary)] text-xs text-center mt-4">
            支付即表示同意《用户协议》和《隐私政策》
          </p>
        </div>
      </div>
    </div>
  )
}