"use client";

import { useState } from "react";
import { signIn } from "next-auth/react";
import { useRouter, useSearchParams } from "next/navigation";
import { Anchor } from "lucide-react";

export default function LoginPage() {
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const router = useRouter();
  const searchParams = useSearchParams();
  const callbackUrl = searchParams.get("callbackUrl") ?? "/dashboard";

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setLoading(true);
    setError("");

    const result = await signIn("credentials", {
      email,
      password,
      redirect: false,
    });

    if (result?.error) {
      setError("Invalid email or password. Please try again.");
      setLoading(false);
    } else {
      router.push(callbackUrl);
      router.refresh();
    }
  }

  return (
    <div className="min-h-screen bg-neutral-50 flex items-center justify-center p-4">
      <div className="w-full max-w-sm">
        <div className="bg-white rounded-xl shadow-sm border border-neutral-200 p-8">
          <div className="flex items-center gap-3 mb-8">
            <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-primary-600">
              <Anchor className="h-5 w-5 text-white" />
            </div>
            <div>
              <h1 className="text-lg font-semibold text-neutral-900">PPMS</h1>
              <p className="text-xs text-neutral-500">Pelagia Payment Management System</p>
              <p className="text-xs text-neutral-400 italic">PMS — it runs the ship.</p>
            </div>
          </div>

          <h2 className="text-xl font-semibold text-neutral-900 mb-6">Sign in</h2>

          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <label
                htmlFor="email"
                className="block text-sm font-medium text-neutral-700 mb-1.5"
              >
                Email address
              </label>
              <input
                id="email"
                type="email"
                autoComplete="email"
                required
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                className="w-full rounded-lg border border-neutral-300 px-3 py-2.5 text-sm text-neutral-900 placeholder:text-neutral-400 focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20"
                placeholder="you@company.com"
              />
            </div>

            <div>
              <label
                htmlFor="password"
                className="block text-sm font-medium text-neutral-700 mb-1.5"
              >
                Password
              </label>
              <input
                id="password"
                type="password"
                autoComplete="current-password"
                required
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                className="w-full rounded-lg border border-neutral-300 px-3 py-2.5 text-sm text-neutral-900 placeholder:text-neutral-400 focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20"
                placeholder="••••••••"
              />
            </div>

            {error && (
              <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">
                {error}
              </p>
            )}

            <button
              type="submit"
              disabled={loading}
              className="w-full rounded-lg bg-primary-600 px-4 py-2.5 text-sm font-semibold text-white hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-primary-500 focus:ring-offset-2 disabled:opacity-60 disabled:cursor-not-allowed transition-colors"
            >
              {loading ? "Signing in…" : "Sign in"}
            </button>
          </form>
        </div>

        <p className="mt-4 text-center text-xs text-neutral-400">
          Contact your administrator if you need access.
        </p>
      </div>
    </div>
  );
}