"use client";

import { zodResolver } from "@hookform/resolvers/zod";
import { useForm } from "react-hook-form";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { LoginSchema, type LoginInput } from "@/lib/schemas";
import { loginUser } from "@/lib/actions/auth";
import { useToast } from "@/hooks/use-toast";
import { useState } from "react";
import { Loader2 } from "lucide-react";
// No longer need useRouter for post-login navigation if server action redirects

export function LoginForm() {
  const { toast } = useToast();
  const [isLoading, setIsLoading] = useState(false);

  const form = useForm<LoginInput>({
    resolver: zodResolver(LoginSchema),
    defaultValues: {
      email: "",
      password: "",
    },
  });

  async function onSubmit(values: LoginInput) {
    setIsLoading(true);
    try {
      const result = await loginUser(values); // This action will now redirect on success

      // If the action returns (i.e., did not redirect), it means there was an error.
      if (result && result.success === false) {
        toast({
          title: "Login Failed",
          description: result.message,
          variant: "destructive",
        });
      }
      // Successful login will result in a redirect handled by Next.js,
      // so client-side navigation or refresh is no longer needed here.
      // The "Login Successful" toast is removed as the page will change.

    } catch (error: any) {
      // Server actions that redirect throw a special error that Next.js catches.
      // We should not show this as a user-facing toast.
      if (error.message?.includes('NEXT_REDIRECT')) {
        // This is an expected error during redirect, let Next.js handle it.
        // console.log("Caught NEXT_REDIRECT, letting Next.js handle it.");
      } else {
        toast({
          title: "Error",
          description: error.message || "An unexpected error occurred. Please try again.",
          variant: "destructive",
        });
      }
    } finally {
      setIsLoading(false);
    }
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
        <FormField
          control={form.control}
          name="email"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Email</FormLabel>
              <FormControl>
                <Input placeholder="you@example.com" {...field} type="email" />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />
        <FormField
          control={form.control}
          name="password"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Password</FormLabel>
              <FormControl>
                <Input type="password" placeholder="••••••••" {...field} />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />
        <Button type="submit" className="w-full" disabled={isLoading}>
          {isLoading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
          Login
        </Button>
      </form>
    </Form>
  );
}