'use client';

import { useRouter } from 'next/navigation';
import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { z } from 'zod';
import { useSuperAdmin } from '../../_lib/super-admin-context';
import { PortalLoginShell } from '../../_components/portal-login-shell';
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from '../../_components/ui/form';
import { Input } from '../../_components/ui/input';
import { Button } from '../../_components/ui/button';
import Link from 'next/link';

const schema = z.object({
  email: z.string().email('Enter a valid email'),
  password: z.string().min(1, 'Password is required'),
});
type FormValues = z.infer<typeof schema>;

export default function SuperAdminLoginPage() {
  const { login } = useSuperAdmin();
  const router = useRouter();

  const form = useForm<FormValues>({ resolver: zodResolver(schema), defaultValues: { email: '', password: '' } });

  async function onSubmit(values: FormValues) {
    try {
      await login(values.email, values.password);
      router.replace('/admin');
    } catch (err) {
      form.setError('root', { message: err instanceof Error ? err.message : 'Login failed' });
    }
  }

  return (
    <PortalLoginShell
      title="Super Admin"
      subtitle="Platform-wide administration access."
      accentClass="bg-slate-900"
      footer={<Link href="/" className="hover:text-foreground transition-colors">← Back to portal selector</Link>}
    >
      <Form {...form}>
        <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
          <FormField control={form.control} name="email" render={({ field }) => (
            <FormItem>
              <FormLabel>Email</FormLabel>
              <FormControl><Input type="email" placeholder="superadmin@tower.com" autoComplete="username" {...field} /></FormControl>
              <FormMessage />
            </FormItem>
          )} />
          <FormField control={form.control} name="password" render={({ field }) => (
            <FormItem>
              <FormLabel>Password</FormLabel>
              <FormControl><Input type="password" autoComplete="current-password" {...field} /></FormControl>
              <FormMessage />
            </FormItem>
          )} />
          {form.formState.errors.root && (
            <p className="text-sm text-destructive">{form.formState.errors.root.message}</p>
          )}
          <Button type="submit" className="w-full" disabled={form.formState.isSubmitting}>
            {form.formState.isSubmitting ? 'Signing in…' : 'Sign in'}
          </Button>
        </form>
      </Form>
    </PortalLoginShell>
  );
}
