"use client";

import { useState } from "react";
import { signIn } from "next-auth/react";
import { useRouter, useSearchParams } from "next/navigation";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Eye, EyeOff, LogIn } from "lucide-react";

const loginSchema = z.object({
  email: z.string().email("Invalid email address"),
  password: z.string().min(1, "Password is required"),
});

type LoginFormValues = z.infer<typeof loginSchema>;

export default function LoginPage() {
  const router = useRouter();
  const searchParams = useSearchParams();
  const callbackUrl = searchParams.get("callbackUrl") ?? "/dashboard";

  const [showPassword, setShowPassword] = useState(false);
  const [authError, setAuthError] = useState<string | null>(null);

  const {
    register,
    handleSubmit,
    formState: { errors, isSubmitting },
  } = useForm<LoginFormValues>({
    resolver: zodResolver(loginSchema),
  });

  const onSubmit = async (data: LoginFormValues) => {
    setAuthError(null);
    const result = await signIn("credentials", {
      email: data.email,
      password: data.password,
      redirect: false,
    });

    if (result?.error) {
      setAuthError("Invalid email or password");
      return;
    }

    router.push(callbackUrl);
    router.refresh();
  };

  return (
    <Card>
      <CardHeader className="pb-4">
        <CardTitle className="text-xl align-middle text-center">Sign in</CardTitle>

      </CardHeader>

      <CardContent>
        <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
          <div className="space-y-1.5">
            <Label htmlFor="email">Email</Label>
            <Input
              id="email"
              type="email"
              placeholder="you@studio.com"
              autoComplete="email"
              autoFocus
              {...register("email")}
            />
            {errors.email && (
              <p className="text-xs text-red-400">{errors.email.message}</p>
            )}
          </div>

          <div className="space-y-1.5">
            <Label htmlFor="password">Password</Label>
            <div className="relative">
              <Input
                id="password"
                type={showPassword ? "text" : "password"}
                placeholder="••••••••"
                autoComplete="current-password"
                className="pr-10"
                {...register("password")}
              />
              <button
                type="button"
                className="absolute right-3 top-1/2 -translate-y-1/2 text-muted-foreground hover:text-foreground"
                onClick={() => setShowPassword((v) => !v)}
                tabIndex={-1}
              >
                {showPassword ? <EyeOff className="h-4 w-4" /> : <Eye className="h-4 w-4" />}
              </button>
            </div>
            {errors.password && (
              <p className="text-xs text-red-400">{errors.password.message}</p>
            )}
          </div>

          {authError && (
            <p className="text-sm text-red-400 text-center">{authError}</p>
          )}

          <Button type="submit" className="w-full gap-2" disabled={isSubmitting}>
            <LogIn className="h-4 w-4" />
            {isSubmitting ? "Signing in..." : "Sign in"}
          </Button>
        </form>


      </CardContent>
    </Card>
  );
}