import { useState } from 'react';
import { Link } from 'react-router-dom';
import {
  Button,
  Card,
  CardHeader,
  CardTitle,
  CardDescription,
  CardContent,
  CardFooter,
  FormField,
  Alert,
  AlertDescription,
  Loader2,
} from '@persona-community-5/ui';

export function ForgotPasswordPage() {
  const [isLoading, setIsLoading] = useState(false);
  const [sent, setSent] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const apiPrefix = import.meta.env.VITE_API_URL || '';

  const handleSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
    e.preventDefault();
    setError(null);
    setIsLoading(true);

    const formData = new FormData(e.currentTarget);
    const email = formData.get('email') as string;

    try {
      const res = await fetch(`${apiPrefix}/api/persona-api/auth/forgot-password`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ email }),
      });

      if (!res.ok) {
        const body = await res.json().catch(() => ({}));
        throw new Error(body.error?.message || body.message || 'Request failed');
      }

      setSent(true);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'An error occurred');
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-[var(--surface-100)] p-4">
      <Card className="w-full max-w-md">
        <CardHeader className="text-center">
          <CardTitle className="text-2xl">Reset your password</CardTitle>
          <CardDescription>
            {sent
              ? 'Check your email for a reset link'
              : "Enter your email and we'll send you a reset link"}
          </CardDescription>
        </CardHeader>

        {!sent ? (
          <form onSubmit={handleSubmit}>
            <CardContent className="space-y-4">
              {error && (
                <Alert variant="destructive">
                  <AlertDescription>{error}</AlertDescription>
                </Alert>
              )}

              <FormField
                label="Email"
                name="email"
                type="email"
                placeholder="you@example.com"
                required
                autoComplete="email"
                autoFocus
              />
            </CardContent>

            <CardFooter className="flex flex-col gap-4">
              <Button type="submit" className="w-full" disabled={isLoading}>
                {isLoading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                Send reset link
              </Button>
              <Link to="/login" className="text-sm text-center text-[var(--accent)] hover:underline">
                Back to sign in
              </Link>
            </CardFooter>
          </form>
        ) : (
          <CardContent className="space-y-4 text-center">
            <p className="text-sm text-[var(--text-muted)]">
              If an account exists with that email, you will receive a password reset link.
            </p>
            <p className="text-xs text-[var(--text-muted)]">
              In dev mode, check the server console for the reset token.
            </p>
            <Link to="/login" className="text-sm text-[var(--accent)] hover:underline">
              Back to sign in
            </Link>
          </CardContent>
        )}
      </Card>
    </div>
  );
}
