"use client"

import { ArrowLeft, CheckCircle, CreditCard, ShieldCheck } from "lucide-react"
import Link from "next/link"
import { useRouter, useSearchParams } from "next/navigation"
import { useState } from "react"
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Separator } from "@/components/ui/separator"
import { Textarea } from "@/components/ui/textarea"
import { getPlayerById, getServiceById } from "@/lib/api"
import type { Actor } from "@/lib/policy/actor"
import { notifySuccess } from "@/lib/toast"
import { useRequireAuth } from "@/lib/use-require-auth"
import { useAuthStore } from "@/store/auth"
import { useOrderStore } from "@/store/orders"
import { useWalletStore } from "@/store/wallet"

export default function NewOrderPage() {
  const router = useRouter()
  const searchParams = useSearchParams()
  const { requireAuth } = useRequireAuth()
  const createPaidOrder = useOrderStore((state) => state.createPaidOrder)
  const balance = useWalletStore((state) => state.balance)
  const serviceId = searchParams.get("serviceId")

  const service = serviceId ? getServiceById(serviceId) : undefined
  const player = service ? getPlayerById(service.playerId) : undefined

  const [quantity, setQuantity] = useState(1)
  const [note, setNote] = useState("")
  const [submitted, setSubmitted] = useState(false)

  if (!service || !player) {
    return (
      <div className="container mx-auto py-8 px-4 text-center text-muted-foreground">
        服务不存在
      </div>
    )
  }

  const totalPrice = service.price * quantity

  if (submitted) {
    return (
      <div className="container mx-auto py-8 px-4 max-w-lg text-center space-y-4">
        <CheckCircle className="h-12 w-12 mx-auto text-green-500" />
        <h2 className="text-xl font-bold">下单成功</h2>
        <p className="text-sm text-muted-foreground">
          订单已创建，等待打手接单。你可以在订单列表中查看进度。
        </p>
        <div className="flex gap-2 justify-center">
          <Button asChild>
            <Link href="/orders">查看订单</Link>
          </Button>
          <Button variant="outline" asChild>
            <Link href={`/player/${player.id}`}>返回打手主页</Link>
          </Button>
        </div>
      </div>
    )
  }

  return (
    <div className="container mx-auto py-8 px-4 max-w-2xl">
      <Link
        href={`/player/${player.id}`}
        className="inline-flex items-center gap-1 text-sm text-muted-foreground hover:text-foreground mb-4"
      >
        <ArrowLeft className="h-4 w-4" />
        返回打手主页
      </Link>

      <h1 className="text-2xl font-bold mb-6">确认下单</h1>

      <div className="space-y-6">
        <Card>
          <CardHeader>
            <CardTitle className="text-base">服务信息</CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center gap-3">
              <Avatar className="h-10 w-10">
                <AvatarImage src={player.user.avatar} />
                <AvatarFallback>{player.user.nickname[0]}</AvatarFallback>
              </Avatar>
              <div>
                <p className="font-medium">{player.user.nickname}</p>
                <p className="text-xs text-muted-foreground">
                  {player.shopName ? `${player.shopName} · ` : ""}
                  {service.gameName}
                </p>
              </div>
            </div>
            <Separator />
            <div className="space-y-2 text-sm">
              <div className="flex justify-between">
                <span className="text-muted-foreground">服务</span>
                <span>{service.title}</span>
              </div>
              <div className="flex justify-between">
                <span className="text-muted-foreground">单价</span>
                <span>
                  ¥{service.price}/{service.unit}
                </span>
              </div>
              {service.rankRange && (
                <div className="flex justify-between">
                  <span className="text-muted-foreground">段位范围</span>
                  <span>{service.rankRange}</span>
                </div>
              )}
            </div>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle className="text-base">订单信息</CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="quantity">数量（{service.unit}）</Label>
              <Input
                id="quantity"
                type="number"
                min={1}
                max={99}
                value={quantity}
                onChange={(e) => setQuantity(Math.max(1, Number.parseInt(e.target.value, 10) || 1))}
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="note">备注（可选）</Label>
              <Textarea
                id="note"
                placeholder="例如：希望晚上8点后开始"
                value={note}
                onChange={(e) => setNote(e.target.value)}
                rows={3}
              />
            </div>
          </CardContent>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle className="text-base">支付信息</CardTitle>
          </CardHeader>
          <CardContent className="space-y-3">
            <div className="flex justify-between text-sm">
              <span className="text-muted-foreground">
                {service.title} × {quantity}
              </span>
              <span>¥{totalPrice}</span>
            </div>
            <Separator />
            <div className="flex justify-between font-medium">
              <span>应付金额</span>
              <span className="text-lg text-primary">¥{totalPrice}</span>
            </div>
            <div className="flex items-center gap-2 text-sm text-muted-foreground">
              <CreditCard className="h-4 w-4" />
              <span>钱包余额: ¥{balance.toFixed(2)}</span>
              {balance < totalPrice && <span className="text-destructive">（余额不足）</span>}
              {balance < totalPrice && (
                <Button variant="outline" size="sm" asChild>
                  <Link href="/wallet">充值</Link>
                </Button>
              )}
            </div>
            <div className="flex items-center gap-2 text-xs text-muted-foreground">
              <ShieldCheck className="h-3.5 w-3.5" />
              <span>资金由平台托管，服务完成后支付给打手</span>
            </div>
          </CardContent>
        </Card>

        <Button
          className="w-full"
          size="lg"
          disabled={balance < totalPrice}
          onClick={() =>
            requireAuth(() => {
              const authUser = useAuthStore.getState().user
              if (!authUser) return

              const actor: Actor = {
                userId: authUser.id,
                role: "consumer",
              }

              const result = createPaidOrder(
                {
                  consumerId: authUser.id,
                  consumerName: authUser.nickname,
                  playerId: player.id,
                  playerName: player.user.nickname,
                  shopId: player.shopId,
                  shopName: player.shopName,
                  service,
                  totalPrice,
                  note,
                },
                actor,
              )
              if (!result.decision.ok || !result.order) {
                return
              }
              const nextOrder = result.order

              setSubmitted(true)
              notifySuccess("下单成功")
              setTimeout(() => {
                router.push(`/order/${nextOrder.id}`)
              }, 800)
            })
          }
        >
          确认支付 ¥{totalPrice}
        </Button>
      </div>
    </div>
  )
}