"use client"

import type React from "react"

import { useRouter } from "next/navigation"
import { useState } from "react"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Loader2 } from "lucide-react"
import Link from "next/link"

export default function LoginPage() {
  const router = useRouter()
  const [email, setEmail] = useState("")
  const [password, setPassword] = useState("")
  const [loading, setLoading] = useState(false)

  async function onSubmit(e: React.FormEvent) {
    e.preventDefault()
    setLoading(true)
    try {
      const fd = new FormData()
      fd.append("email", email)
      fd.append("password", password)
      const res = await fetch("/api/login", { method: "POST", body: fd })
      const data = await res.json()
      if (!res.ok) {
        alert(`Login failed: ${data?.message ?? res.statusText}`)
        return
      }
      router.replace("/admin")
    } catch (err: any) {
      alert(`Error: ${err?.message ?? "unknown error"}`)
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="min-h-[80vh] grid place-items-center p-4">
      <Card className="w-full max-w-md">
        <CardHeader>
          <CardTitle className="text-2xl">Admin Login</CardTitle>
          <CardDescription>Enter your credentials to access the admin dashboard.</CardDescription>
        </CardHeader>
        <form onSubmit={onSubmit}>
          <CardContent className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="email">Email</Label>
              <Input id="email" type="email" value={email} onChange={(e) => setEmail(e.target.value)} required />
            </div>
            <div className="space-y-2">
              <Label htmlFor="password">Password</Label>
              <Input
                id="password"
                type="password"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                required
              />
            </div>
          </CardContent>
          <CardFooter className="flex items-center justify-between">
            <Button type="submit" className="w-full" disabled={loading}>
              {loading ? (
                <>
                  <Loader2 className="mr-2 h-4 w-4 animate-spin" /> Signing in...
                </>
              ) : (
                "Sign in"
              )}
            </Button>
          </CardFooter>
        </form>
      </Card>
      <div className="mt-6 text-sm text-muted-foreground">
        <Link href="/">Back to landing</Link>
      </div>
    </div>
  )
}