"use client"

import { zodResolver } from "@hookform/resolvers/zod"
import { useForm } from "react-hook-form"
import * as z from "zod"
import { Button } from "@/components/ui/button"
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form"
import { Input } from "@/components/ui/input"
import { useToast } from "@/components/ui/use-toast"
import { useRouter } from "next/navigation"
import { useAuth } from "@/context/auth-context"
import Link from "next/link"
import { ThemeToggle } from "@/components/theme-toggle"
import { Checkbox } from "@/components/ui/checkbox"
import { useState } from "react"

const formSchema = z.object({
  username: z.string().min(2, {
    message: "用户名至少需要2个字符",
  }),
  password: z.string().min(6, {
    message: "密码至少需要6个字符",
  }),
  rememberMe: z.boolean().default(false),
})

export default function LoginPage() {
  const { toast } = useToast()
  const router = useRouter()
  const { login } = useAuth()
  const [isLoading, setIsLoading] = useState(false)

  const form = useForm<z.infer<typeof formSchema>>({
    resolver: zodResolver(formSchema),
    defaultValues: {
      username: "",
      password: "",
      rememberMe: false,
    },
  })

  async function onSubmit(values: z.infer<typeof formSchema>) {
    setIsLoading(true)
    try {
      const response = await fetch("/api/reader/login", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(values),
      })

      // 从响应头中获取 Authorization token
      const authToken = response.headers.get("Authorization")

      if (!authToken) {
        toast({
          variant: "destructive",
          title: "登录失败",
          description: "未能获取授权令牌",
        })
        setIsLoading(false)
        return
      }

      const result = await response.json()

      if (result.code === 0) {
        login(result.data, authToken)
        toast({
          title: "登录成功",
          description: "欢迎回来，" + result.data.username,
        })
        router.push("/")
      } else {
        toast({
          variant: "destructive",
          title: "登录失败",
          description: result.msg || "用户名或密码错误",
        })
      }
    } catch (error) {
      toast({
        variant: "destructive",
        title: "登录失败",
        description: "服务器连接错误，请稍后再试",
      })
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <div className="container relative flex min-h-screen flex-col items-center justify-center md:grid lg:max-w-none lg:grid-cols-2 lg:px-0">
      <div className="absolute right-4 top-4 md:right-8 md:top-8">
        <ThemeToggle />
      </div>
      <div className="relative hidden h-full flex-col bg-muted p-10 text-white lg:flex dark:border-r">
        <div className="absolute inset-0 bg-zinc-900" />
        <div className="relative z-20 flex items-center text-lg font-medium">
          <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 24 24"
            fill="none"
            stroke="currentColor"
            strokeWidth="2"
            strokeLinecap="round"
            strokeLinejoin="round"
            className="mr-2 h-6 w-6"
          >
            <path d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253" />
          </svg>
          图书管理系统
        </div>
        <div className="relative z-20 mt-auto">
          <blockquote className="space-y-2">
            <p className="text-lg">"书籍是人类进步的阶梯。"</p>
            <footer className="text-sm">高尔基</footer>
          </blockquote>
        </div>
      </div>
      <div className="lg:p-8">
        <div className="mx-auto flex w-full flex-col justify-center space-y-6 sm:w-[350px]">
          <div className="flex flex-col space-y-2 text-center">
            <h1 className="text-2xl font-semibold tracking-tight">账户登录</h1>
            <p className="text-sm text-muted-foreground">输入您的用户名和密码登录</p>
          </div>
          <Form {...form}>
            <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
              <FormField
                control={form.control}
                name="username"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>用户名</FormLabel>
                    <FormControl>
                      <Input placeholder="请输入用户名" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="password"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>密码</FormLabel>
                    <FormControl>
                      <Input type="password" placeholder="请输入密码" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="rememberMe"
                render={({ field }) => (
                  <FormItem className="flex flex-row items-start space-x-3 space-y-0">
                    <FormControl>
                      <Checkbox checked={field.value} onCheckedChange={field.onChange} />
                    </FormControl>
                    <div className="space-y-1 leading-none">
                      <FormLabel>记住我</FormLabel>
                    </div>
                  </FormItem>
                )}
              />
              <Button type="submit" className="w-full" disabled={isLoading}>
                {isLoading ? "登录中..." : "登录"}
              </Button>
            </form>
          </Form>
          <div className="text-center text-sm text-muted-foreground">
            还没有账户?{" "}
            <Link href="/register" className="underline underline-offset-4 hover:text-primary">
              注册
            </Link>
          </div>
        </div>
      </div>
    </div>
  )
}