import PlayzerIcon from '@/assets/playzer-favicon-512-transparent.png';
import { Button } from '@/components/ui/button';
import { Field, FieldError, FieldLabel } from '@/components/ui/field';
import { Input } from '@/components/ui/input';
import { apiClient, authClient } from '@/lib/api-client';
import { useAuth } from '@/lib/auth';
import { acceptStoredPendingInvite } from '@/lib/invitations';
import { zodResolver } from '@hookform/resolvers/zod';
import { Link } from '@tanstack/react-router';
import { useState } from 'react';
import { useForm } from 'react-hook-form';
import { z } from 'zod';

const loginSchema = z.object({
  email: z.string().email('Ingresá un email válido.'),
  password: z.string().min(6, 'La contraseña debe tener al menos 6 caracteres.'),
});

type LoginForm = z.infer<typeof loginSchema>;

export function LoginPage() {
  const { signInWithPassword } = useAuth();
  const [submitError, setSubmitError] = useState<string | null>(null);

  const {
    register,
    handleSubmit,
    formState: { errors, isSubmitting, isValid },
  } = useForm<LoginForm>({
    resolver: zodResolver(loginSchema),
    mode: 'onChange',
    defaultValues: {
      email: '',
      password: '',
    },
  });

  async function handlePostLogin() {
    await acceptStoredPendingInvite(apiClient.complexes.acceptPendingInvitations);
  }

  const onSubmit = async (values: LoginForm) => {
    setSubmitError(null);

    try {
      await signInWithPassword(values);
      await handlePostLogin();
    } catch {
      setSubmitError('No pudimos iniciar sesión. Verificá tus credenciales.');
    }
  };

  const handleGoogleSignIn = async () => {
    setSubmitError(null);

    try {
      await authClient.signIn.social({
        provider: 'google',
        callbackURL: `${window.location.origin}/auth-callback`,
      });
    } catch {
      setSubmitError('No pudimos iniciar sesión con Google.');
    }
  };

  return (
    <main className="flex min-h-screen w-full flex-col items-center justify-center gap-6 px-3 sm:px-6">
      <Link to="/" className="group flex items-center gap-3">
        <div className="flex size-10 items-center justify-center">
          <img src={PlayzerIcon} alt="Playzer" className="size-7" />
        </div>
        <span className="bg-gradient-to-r from-primary via-primary to-reserved bg-clip-text text-xl font-bold tracking-tight text-transparent">
          Playzer
        </span>
      </Link>
      <section className="w-full max-w-sm rounded-xl border bg-card p-6 text-card-foreground shadow-sm">
        <h1 className="mb-2 text-2xl font-semibold">Iniciar sesión</h1>
        <p className="mb-4 text-sm text-muted-foreground">
          Ingresá con tu cuenta para acceder a Playzer.
        </p>

        <Button type="button" variant="outline" className="w-full" onClick={handleGoogleSignIn}>
          <svg className="mr-2 h-4 w-4" viewBox="0 0 24 24" aria-hidden="true">
            <path
              fill="currentColor"
              d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
            />
            <path
              fill="currentColor"
              d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
            />
            <path
              fill="currentColor"
              d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
            />
            <path
              fill="currentColor"
              d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
            />
          </svg>
          Continuar con Google
        </Button>

        <div className="relative my-4">
          <div className="absolute inset-0 flex items-center">
            <span className="w-full border-t" />
          </div>
          <div className="relative flex justify-center text-xs uppercase">
            <span className="bg-card px-2 text-muted-foreground">O</span>
          </div>
        </div>

        <form className="space-y-3" onSubmit={handleSubmit(onSubmit)}>
          <Field data-invalid={Boolean(errors.email)}>
            <FieldLabel htmlFor="email">Email</FieldLabel>
            <Input
              id="email"
              type="email"
              placeholder="tu@email.com"
              aria-invalid={Boolean(errors.email)}
              {...register('email')}
            />
            <FieldError errors={[errors.email]} />
          </Field>

          <Field data-invalid={Boolean(errors.password)}>
            <FieldLabel htmlFor="password">Contraseña</FieldLabel>
            <Input
              id="password"
              type="password"
              placeholder="••••••••"
              aria-invalid={Boolean(errors.password)}
              {...register('password')}
            />
            <FieldError errors={[errors.password]} />
          </Field>

          {submitError && <p className="text-sm text-destructive">{submitError}</p>}

          <Button type="submit" className="w-full" disabled={!isValid || isSubmitting}>
            {isSubmitting ? 'Ingresando...' : 'Ingresar'}
          </Button>
        </form>

        <p className="mt-4 text-center text-sm text-muted-foreground">
          <Link to="/reset-password" className="text-primary hover:underline">
            ¿Olvidaste tu contraseña?
          </Link>
          <span className="mx-3 text-muted-foreground">|</span>
          <Link to="/signup" className="text-primary hover:underline">
            Crear cuenta
          </Link>
        </p>
      </section>
    </main>
  );
}