"use client"

import type React from "react"
import { useState } from "react"
import { X, CheckCircle, Bitcoin, Globe, Copy, Check } from "lucide-react"
import { Button } from "@/components/ui/button"
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="M8.77 20.62l9.92-4.33c-.12-.33-.24-.66-.38-.99-.14-.33-.3-.66-.47-.99H8.08c-2.2 0-3.99-1.79-3.99-3.99V8.08c0-2.2 1.79-3.99 3.99-3.99h7.84c2.2 0 3.99 1.79 3.99 3.99v2.24h-8.66c-.55 0-1 .45-1 1s.45 1 1 1h10.66c-.18 1.73-.71 3.36-1.53 4.83l-2.76 1.2c-.74-1.69-1.74-3.24-2.93-4.6-.52-.59-1.11-1.13-1.76-1.59H4.09v4.24c0 2.2 1.79 3.99 3.99 3.99h.69v.23z" />
  </svg>
)

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

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>("wechat")
  const [isProcessing, setIsProcessing] = useState(false)
  const [isSuccess, setIsSuccess] = useState(false)
  const [showPaymentDetails, setShowPaymentDetails] = useState(false)
  const [copied, setCopied] = useState(false)

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

  const paymentConfig = settings?.paymentMethods || {
    wechat: { enabled: true, qrCode: "", account: "" },
    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 () => {
    if (paymentMethod === "usdt" || paymentMethod === "paypal" || paymentMethod === "wechat" || paymentMethod === "alipay") {
      setShowPaymentDetails(true)
      return
    }

    setIsProcessing(true)
    await new Promise((resolve) => setTimeout(resolve, 1500))

    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)
      setTimeout(() => {
        onSuccess()
        onClose()
        setIsSuccess(false)
      }, 1500)
    }
  }

  const confirmCryptoPayment = 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)
    setShowPaymentDetails(false)

    if (success) {
      setIsSuccess(true)
      setTimeout(() => {
        onSuccess()
        onClose()
        setIsSuccess(false)
      }, 1500)
    }
  }

  if (!isOpen) return null

  const paymentMethods: {
    id: PaymentMethod
    name: string
    icon: React.ReactNode
    color: string
    enabled: boolean
    extra?: string
  }[] = [
    {
      id: "wechat",
      name: "微信支付",
      icon: <WechatIcon />,
      color: "bg-[#07C160]",
      enabled: paymentConfig.wechat.enabled,
    },
    {
      id: "alipay",
      name: "支付宝",
      icon: <AlipayIcon />,
      color: "bg-[#1677FF]",
      enabled: paymentConfig.alipay.enabled,
    },
    {
      id: "usdt",
      name: `USDT (${paymentConfig.usdt.network || "TRC20"})`,
      icon: <Bitcoin className="w-5 h-5" />,
      color: "bg-[#26A17B]",
      enabled: paymentConfig.usdt.enabled,
      extra: `≈ $${usdtAmount}`,
    },
    {
      id: "paypal",
      name: "PayPal",
      icon: <Globe className="w-5 h-5" />,
      color: "bg-[#003087]",
      enabled: paymentConfig.paypal.enabled,
      extra: `≈ $${paypalAmount}`,
    },
  ]

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

  // Payment details view
  if (showPaymentDetails) {
    const isCrypto = paymentMethod === "usdt"
    const isPayPal = paymentMethod === "paypal"
    const isWechat = paymentMethod === "wechat"
    const isAlipay = paymentMethod === "alipay"

    let title = ""
    let address = ""
    let displayAmount = `¥${amount.toFixed(2)}`
    let qrCodeUrl = ""

    if (isCrypto) {
      title = "USDT支付"
      address = paymentConfig.usdt.address
      displayAmount = `$${usdtAmount} USDT`
    } else if (isPayPal) {
      title = "PayPal支付"
      address = paymentConfig.paypal.email
      displayAmount = `$${paypalAmount} USD`
    } else if (isWechat) {
      title = "微信支付"
      qrCodeUrl = paymentConfig.wechat.qrCode || "/images/wechat-pay.png"
    } else if (isAlipay) {
      title = "支付宝支付"
      qrCodeUrl = paymentConfig.alipay.qrCode || "/images/alipay.png"
    }

    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-sm" onClick={onClose} />
        <div className="relative w-full max-w-md bg-[#0f2137] rounded-2xl border border-gray-700/50 overflow-hidden">
          <button onClick={onClose} className="absolute top-4 right-4 p-2 text-gray-400 hover:text-white z-10">
            <X className="w-5 h-5" />
          </button>

          <div className="p-6">
            <h3 className="text-lg font-semibold text-white mb-4 text-center">{title}</h3>

            <div className="bg-[#0a1628] rounded-xl p-4 mb-4 text-center">
              <p className="text-gray-400 text-sm mb-2">支付金额</p>
              <p className="text-3xl font-bold text-[#38bdac]">{displayAmount}</p>
              {(isCrypto || isPayPal) && <p className="text-gray-500 text-sm">≈ ¥{amount.toFixed(2)}</p>}
            </div>

            {(isWechat || isAlipay) ? (
               <div className="flex flex-col items-center justify-center mb-6">
                 <div className="bg-white p-2 rounded-xl mb-4">
                   {/* eslint-disable-next-line @next/next/no-img-element */}
                   <img src={qrCodeUrl} alt={title} className="w-48 h-48 object-contain" />
                 </div>
                 <p className="text-gray-400 text-sm">请使用{title === "微信支付" ? "微信" : "支付宝"}扫码支付</p>
               </div>
            ) : (
              <div className="bg-[#0a1628] rounded-xl p-4 mb-4">
                <p className="text-gray-400 text-sm 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">
                    {address || "请联系客服获取"}
                  </p>
                  {address && (
                    <button onClick={() => handleCopyAddress(address)} className="text-[#38bdac] hover:text-[#4fd4c4]">
                      {copied ? <Check className="w-5 h-5" /> : <Copy className="w-5 h-5" />}
                    </button>
                  )}
                </div>
              </div>
            )}

            <div className="bg-orange-500/10 border border-orange-500/30 rounded-xl p-4 mb-6">
              <p className="text-orange-400 text-sm text-center">
                支付完成后，请点击下方"我已支付"按钮，<br/>系统将自动开通阅读权限
              </p>
            </div>

            <div className="flex gap-3">
              <Button
                onClick={() => setShowPaymentDetails(false)}
                variant="outline"
                className="flex-1 border-gray-600 text-white hover:bg-gray-700/50 bg-transparent"
              >
                返回
              </Button>
              <Button
                onClick={confirmCryptoPayment}
                disabled={isProcessing}
                className="flex-1 bg-[#38bdac] hover:bg-[#2da396] text-white"
              >
                {isProcessing ? "处理中..." : "已完成支付"}
              </Button>
            </div>
          </div>
        </div>
      </div>
    )
  }

  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-sm" onClick={onClose} />
      <div className="relative w-full max-w-md bg-[#0f2137] rounded-2xl border border-gray-700/50 overflow-hidden">
        <button
          onClick={onClose}
          className="absolute top-4 right-4 p-2 text-gray-400 hover:text-white transition-colors"
        >
          <X className="w-5 h-5" />
        </button>

        {isSuccess ? (
          <div className="p-8 text-center">
            <div className="w-20 h-20 mx-auto mb-4 rounded-full bg-[#38bdac]/20 flex items-center justify-center">
              <CheckCircle className="w-10 h-10 text-[#38bdac]" />
            </div>
            <h3 className="text-xl font-semibold text-white mb-2">支付成功</h3>
            <p className="text-gray-400">{type === "fullbook" ? "您已解锁全部内容" : "您已解锁本节内容"}</p>
          </div>
        ) : (
          <>
            <div className="p-6 border-b border-gray-700/50">
              <h3 className="text-lg font-semibold text-white mb-1">确认支付</h3>
              <p className="text-gray-400 text-sm">
                {type === "fullbook" ? "购买整本书,解锁全部内容" : `购买: ${sectionTitle}`}
              </p>
            </div>

            <div className="p-6 border-b border-gray-700/50 text-center">
              <p className="text-gray-400 text-sm mb-1">支付金额</p>
              <p className="text-4xl font-bold text-white">¥{amount.toFixed(2)}</p>
              {(paymentMethod === "usdt" || paymentMethod === "paypal") && (
                <p className="text-[#38bdac] text-sm mt-1">
                  ≈ ${paymentMethod === "usdt" ? usdtAmount : paypalAmount} USD
                </p>
              )}
              {user?.referredBy && (
                <p className="text-[#38bdac] text-sm mt-2">
                  通过邀请注册,{settings?.distributorShare || 90}%将返还给推荐人
                </p>
              )}
            </div>

            <div className="p-6 space-y-3">
              <p className="text-gray-400 text-sm mb-3">选择支付方式</p>
              {availableMethods.map((method) => (
                <button
                  key={method.id}
                  onClick={() => setPaymentMethod(method.id)}
                  className={`w-full p-4 rounded-xl border flex items-center gap-4 transition-all ${
                    paymentMethod === method.id
                      ? "border-[#38bdac] bg-[#38bdac]/10"
                      : "border-gray-700 hover:border-gray-600"
                  }`}
                >
                  <div className={`w-10 h-10 rounded-lg ${method.color} flex items-center justify-center text-white`}>
                    {method.icon}
                  </div>
                  <div className="flex-1 text-left">
                    <span className="text-white">{method.name}</span>
                    {method.extra && <span className="text-gray-400 text-sm ml-2">{method.extra}</span>}
                  </div>
                  {paymentMethod === method.id && <CheckCircle className="w-5 h-5 text-[#38bdac]" />}
                </button>
              ))}
              {availableMethods.length === 0 && <p className="text-gray-500 text-center py-4">暂无可用支付方式</p>}
            </div>

            <div className="p-6 pt-0">
              <Button
                onClick={handlePayment}
                disabled={isProcessing || availableMethods.length === 0}
                className="w-full bg-[#38bdac] hover:bg-[#2da396] text-white py-6 text-lg"
              >
                {isProcessing ? (
                  <div className="flex items-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-gray-500 text-xs text-center mt-3">支付即表示同意《用户协议》和《隐私政策》</p>
            </div>
          </>
        )}
      </div>
    </div>
  )
}