"use client"

import type React from "react"

import { useState } from "react"
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Alert, AlertDescription } from "@/components/ui/alert"
import { Users, Eye, EyeOff } from "lucide-react"
import Link from "next/link"
import { useRouter } from "next/navigation"
import { useAuth } from "@/lib/hooks/use-auth"

export default function LoginPage() {
  const [email, setEmail] = useState("")
  const [password, setPassword] = useState("")
  const [showPassword, setShowPassword] = useState(false)
  const [error, setError] = useState("")
  const [isLoading, setIsLoading] = useState(false)
  const router = useRouter()
  const { login } = useAuth()

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()
    setError("")
    setIsLoading(true)

    try {
      const success = await login(email, password)
      if (success) {
        router.push("/dashboard")
      } else {
        setError("帳號或密碼錯誤")
      }
    } catch (err) {
      setError("登入失敗，請稍後再試")
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <div className="min-h-screen bg-background flex items-center justify-center p-4">
      <div className="w-full max-w-md">
        <div className="text-center mb-8">
          <div className="w-16 h-16 bg-primary rounded-lg flex items-center justify-center mx-auto mb-4">
            <Users className="w-8 h-8 text-primary-foreground" />
          </div>
          <h1 className="text-2xl font-bold text-foreground">HR 評估系統</h1>
          <p className="text-muted-foreground">請登入您的帳戶</p>
        </div>

        <Card>
          <CardHeader>
            <CardTitle>登入</CardTitle>
            <CardDescription>輸入您的帳號和密碼以存取系統</CardDescription>
          </CardHeader>
          <CardContent>
            <form onSubmit={handleSubmit} className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="email">電子郵件</Label>
                <Input
                  id="email"
                  type="email"
                  placeholder="請輸入電子郵件"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  required
                />
              </div>

              <div className="space-y-2">
                <Label htmlFor="password">密碼</Label>
                <div className="relative">
                  <Input
                    id="password"
                    type={showPassword ? "text" : "password"}
                    placeholder="請輸入密碼"
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    required
                  />
                  <Button
                    type="button"
                    variant="ghost"
                    size="sm"
                    className="absolute right-0 top-0 h-full px-3 py-2 hover:bg-transparent"
                    onClick={() => setShowPassword(!showPassword)}
                  >
                    {showPassword ? <EyeOff className="h-4 w-4" /> : <Eye className="h-4 w-4" />}
                  </Button>
                </div>
              </div>

              {error && (
                <Alert variant="destructive">
                  <AlertDescription>{error}</AlertDescription>
                </Alert>
              )}

              <Button type="submit" className="w-full" disabled={isLoading}>
                {isLoading ? "登入中..." : "登入"}
              </Button>
            </form>

            <div className="mt-6 text-center">
              <p className="text-sm text-muted-foreground">
                還沒有帳戶？{" "}
                <Link href="/register" className="text-primary hover:underline">
                  立即註冊
                </Link>
              </p>
            </div>

            <div className="mt-4 p-4 bg-muted/50 rounded-lg">
              <p className="text-sm font-medium mb-2">測試帳戶：</p>
              <div className="text-xs text-muted-foreground space-y-1">
                <p>管理者：admin@company.com / admin123</p>
                <p>員工：user@company.com / user123</p>
              </div>
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  )
}