'use client'

import { useState } from 'react'
import { signIn } from 'next-auth/react'
import { useRouter } from 'next/navigation'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
import { Input } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { Button } from '@/components/ui/button'

export default function LoginPage() {
  const router = useRouter()
  const [error, setError] = useState('')
  const [loading, setLoading] = useState(false)

  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault()
    setError('')
    setLoading(true)

    const form = new FormData(e.currentTarget)
    const result = await signIn('credentials', {
      email: form.get('email') as string,
      password: form.get('password') as string,
      redirect: false,
    })

    if (result?.error) {
      setError('Invalid email or password')
      setLoading(false)
    } else {
      router.push('/dashboard')
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-background p-4">
      <Card className="w-full max-w-sm">
        <CardHeader>
          <CardTitle className="text-2xl">Sign in</CardTitle>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="email">Email</Label>
              <Input
                id="email"
                name="email"
                type="email"
                autoComplete="email"
                required
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="password">Password</Label>
              <Input
                id="password"
                name="password"
                type="password"
                autoComplete="current-password"
                required
              />
            </div>
            {error && (
              <p className="text-sm text-destructive">{error}</p>
            )}
            <Button type="submit" className="w-full" disabled={loading}>
              {loading ? 'Signing in…' : 'Sign in'}
            </Button>
          </form>
        </CardContent>
      </Card>
    </div>
  )
}