"use client"

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

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>
)

const AlipayIcon = () => (
  <svg viewBox="0 0 24 24" className="w-5 h-5" fill="currentColor">
    <path d="M20.422 13.066c-.198-.07-.405-.137-.62-.202.107-.263.204-.534.29-.814h-3.32v-.93h3.927v-.627h-3.927v-1.18h-1.637c.07-.138.131-.28.184-.425l-1.483-.326a4.091 4.091 0 0 1-.405.75h-2.78v1.181H7.72v.627h2.932v.93H7.205v.652h5.784a9.296 9.296 0 0 1-.608.814 13.847 13.847 0 0 0-2.76-.93l-.483.652c1.038.273 1.96.608 2.766 1.008a8.483 8.483 0 0 1-3.603 1.484l.43.652c1.71-.378 3.103-1.03 4.18-1.957.665.395 1.223.835 1.67 1.32l.608-.652c-.44-.43-.984-.836-1.637-1.215a9.6 9.6 0 0 0 .72-.93c.182-.264.345-.53.488-.798.587.168 1.12.35 1.598.544 1.956.8 2.82 1.614 2.82 2.665 0 .727-.587 1.277-2.21 1.277-1.193 0-2.524-.203-3.996-.609l-.103.75c1.445.378 2.843.567 4.196.567 2.158 0 3.204-.748 3.204-2.013 0-1.382-1.183-2.437-3.58-3.413z" />
    <path d="M21.714 4H2.286A2.286 2.286 0 0 0 0 6.286v11.428A2.286 2.286 0 0 0 2.286 20h19.428A2.286 2.286 0 0 0 24 17.714V6.286A2.286 2.286 0 0 0 21.714 4zM2.286 5.143h19.428c.631 0 1.143.512 1.143 1.143v8.08c-.957-.454-2.222-.903-3.75-1.346a9.8 9.8 0 0 0 .607-2.02h-4.571V9.286h5.143V8.143h-5.143V6.286H13.43v1.857H8.286v1.143h5.143V11H8.286v1.143h6.356a11.54 11.54 0 0 1-.916 1.512 16.648 16.648 0 0 0-3.3-1.12l-.576.78c1.242.328 2.348.73 3.31 1.21a10.175 10.175 0 0 1-4.317 1.78l.514.78c2.048-.454 3.718-1.237 5.008-2.344.796.472 1.464 1 2.004 1.583l.726-.78c-.527-.516-1.179-.996-1.96-1.455.327-.407.627-.839.9-1.295.264-.447.495-.907.694-1.38.7.2 1.341.412 1.916.637 2.343.96 3.378 1.935 3.378 3.195 0 .872-.703 1.532-2.647 1.532-1.43 0-3.023-.244-4.786-.732l-.123.9c1.73.454 3.407.68 5.03.68 2.585 0 3.84-.899 3.84-2.416 0-1.166-.69-2.152-2.066-2.96v-.001c-.24-.14-.495-.276-.77-.408V6.286a1.143 1.143 0 0 0-1.143-1.143z" />
  </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
}

export function PaymentModal({ isOpen, onClose, type, sectionId, sectionTitle, amount, onSuccess }: PaymentModalProps) {
  const [paymentMethod, setPaymentMethod] = useState<PaymentMethod>("alipay")
  const [isProcessing, setIsProcessing] = useState(false)
  const [isSuccess, setIsSuccess] = useState(false)
  const [showQRCode, setShowQRCode] = useState(false)
  const [copied, setCopied] = useState(false)

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

  useEffect(() => {
    if (isOpen) {
      setShowQRCode(false)
      setIsSuccess(false)
      setIsProcessing(false)
    }
  }, [isOpen])

  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)

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

  const handlePayment = async () => {
    setShowQRCode(true)

    if (paymentMethod === "wechat" && paymentConfig.wechat?.qrCode) {
      const link = paymentConfig.wechat.qrCode
      if (link.startsWith("http") || link.startsWith("weixin://")) {
        window.open(link, "_blank")
      }
    } else if (paymentMethod === "alipay" && paymentConfig.alipay?.qrCode) {
      const link = paymentConfig.alipay.qrCode
      if (link.startsWith("http") || link.startsWith("alipays://")) {
        window.open(link, "_blank")
      }
    }
  }

  const confirmPayment = async () => {
    setIsProcessing(true)
    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)
    }

    setIsProcessing(false)

    if (success) {
      setIsSuccess(true)

      const groupUrl = paymentConfig.wechat?.groupQrCode
      if (groupUrl) {
        setTimeout(() => {
          window.open(groupUrl, "_blank")
        }, 800)
      }

      setTimeout(() => {
        onSuccess()
        onClose()
        setIsSuccess(false)
        setShowQRCode(false)
      }, 2500)
    }
  }

  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: "alipay",
      name: "支付宝",
      icon: <AlipayIcon />,
      color: "#1677FF",
      iconBg: "rgba(22, 119, 255, 0.15)",
      enabled: paymentConfig.alipay?.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 ?? true,
      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 - iOS毛玻璃风格
  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，请点击下方按钮确认"
    let qrCodeUrl = ""

    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"
      qrCodeUrl = paymentConfig.wechat?.qrCode || ""
      hint = "请使用微信扫码支付"
    } else if (isAlipay) {
      title = "支付宝支付"
      qrCodeUrl = paymentConfig.alipay?.qrCode || ""
      hint = "请使用支付宝扫码支付"
    }

    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>

            {/* QR Code Display */}
            {(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">
                  {qrCodeUrl ? (
                    <img
                      src={qrCodeUrl || "/placeholder.svg"}
                      alt="支付二维码"
                      className="w-full h-full object-contain rounded-lg"
                    />
                  ) : (
                    <div className="flex flex-col items-center text-gray-400">
                      <QrCode className="w-16 h-16 mb-2" />
                      <span className="text-sm text-center">请在后台配置收款码</span>
                    </div>
                  )}
                </div>
                <p className="text-[var(--app-text-tertiary)] text-sm">{hint}</p>
              </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={() => setShowQRCode(false)}
                className="btn-ios-secondary flex-1"
              >
                返回
              </button>
              <button
                onClick={confirmPayment}
                disabled={isProcessing}
                className="btn-ios flex-1 glow disabled:opacity-50"
              >
                {isProcessing ? (
                  <div className="flex items-center justify-center gap-2">
                    <div className="w-4 h-4 border-2 border-white border-t-transparent rounded-full animate-spin" />
                    处理中...
                  </div>
                ) : (
                  "已完成支付"
                )}
              </button>
            </div>
          </div>
        </div>
      </div>
    )
  }

  // 支付成功页面
  if (isSuccess) {
    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 - iOS风格
  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={isProcessing || availableMethods.length === 0}
            className="btn-ios w-full glow text-lg disabled:opacity-50"
          >
            {isProcessing ? (
              <div className="flex items-center justify-center gap-2">
                <div className="w-5 h-5 border-2 border-white border-t-transparent rounded-full animate-spin" />
                处理中...
              </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>
  )
}
