"use client";

import Link from "next/link";
import { useState } from "react";
import { useRouter } from "next/navigation";
import { signIn } from "next-auth/react";
import { Card, CardContent, CardHeader, CardTitle } from "~/components/ui/card";
import { Input } from "~/components/ui/input";
import { Button } from "~/components/ui/button";
import { Label } from "~/components/ui/label";
import { toast } from "sonner";
import { Logo } from "~/components/logo";
import { Mail, Lock, ArrowRight } from "lucide-react";

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

  async function handleSignIn(e: React.FormEvent) {
    e.preventDefault();
    setLoading(true);
    
    const result = await signIn("credentials", {
      email,
      password,
      redirect: false,
    });

    setLoading(false);
    
    if (result?.error) {
      toast.error("Invalid email or password");
    } else {
      toast.success("Signed in successfully!");
      router.push("/dashboard");
      router.refresh();
    }
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-green-50 to-emerald-100 flex items-center justify-center p-4">
      <div className="w-full max-w-md space-y-8">
        {/* Logo and Welcome */}
        <div className="text-center space-y-4">
          <Logo size="lg" className="mx-auto" />
          <div>
            <h1 className="text-2xl font-bold text-gray-900">Welcome back</h1>
            <p className="text-gray-600 mt-2">Sign in to your beenvoice account</p>
          </div>
        </div>

        {/* Sign In Form */}
        <Card className="shadow-xl border-0">
          <CardHeader className="space-y-1">
            <CardTitle className="text-xl text-center">Sign In</CardTitle>
          </CardHeader>
          <CardContent>
            <form onSubmit={handleSignIn} className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="email">Email</Label>
                <div className="relative">
                  <Mail className="absolute left-3 top-3 h-4 w-4 text-gray-400" />
                  <Input
                    id="email"
                    type="email"
                    value={email}
                    onChange={e => setEmail(e.target.value)}
                    required
                    autoFocus
                    className="pl-10"
                    placeholder="Enter your email"
                  />
                </div>
              </div>
              <div className="space-y-2">
                <Label htmlFor="password">Password</Label>
                <div className="relative">
                  <Lock className="absolute left-3 top-3 h-4 w-4 text-gray-400" />
                  <Input
                    id="password"
                    type="password"
                    value={password}
                    onChange={e => setPassword(e.target.value)}
                    required
                    className="pl-10"
                    placeholder="Enter your password"
                  />
                </div>
              </div>
              <Button type="submit" className="w-full" disabled={loading}>
                {loading ? (
                  "Signing in..."
                ) : (
                  <>
                    Sign In
                    <ArrowRight className="ml-2 h-4 w-4" />
                  </>
                )}
              </Button>
            </form>
            <div className="mt-6 text-center text-sm">
              <span className="text-gray-600">Don&apos;t have an account? </span>
              <Link href="/auth/register" className="text-green-600 hover:text-green-700 font-medium">
                Create one now
              </Link>
            </div>
          </CardContent>
        </Card>

        {/* Features */}
        <div className="text-center space-y-4">
          <p className="text-sm text-gray-500">Simple invoicing for freelancers and small businesses</p>
          <div className="flex justify-center space-x-6 text-xs text-gray-400">
            <span>✓ Easy client management</span>
            <span>✓ Professional invoices</span>
            <span>✓ Payment tracking</span>
          </div>
        </div>
      </div>
    </div>
  );
}