"use client";

import React, { useState } from "react";
import { useRouter } from "next/navigation";
import { useAuth } from "../app/context/AuthContext";

const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

const AuthPage = () => {
  const router = useRouter();
  const { login } = useAuth();

  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [rememberMe, setRememberMe] = useState(false);
  const [checkboxError, setCheckboxError] = useState(false);
  const [authError, setAuthError] = useState("");

  const isEmailValid = emailRegex.test(email);
  const isFormValid = isEmailValid && password.length > 0;

  const handleSubmit = (e) => {
    e.preventDefault();

    if (!rememberMe) {
      setCheckboxError(true);
      return;
    }
    setCheckboxError(false);

    if (!isFormValid) return;

    try {
      login(email, password); // редирект сделает сам контекст
    } catch (err) {
      setAuthError(err.message);
    }
  };

  return (
    <div className="min-h-screen w-full bg-[#90D2F9] flex items-center justify-center px-4">
      <div className="w-full max-w-md bg-white/10 rounded-2xl p-6 sm:p-8 shadow-lg relative">
        {checkboxError && (
          <div
            className="absolute -top-10 left-0 w-full bg-red-500 text-white text-xs sm:text-sm font-montserrat px-3 py-2 rounded-t-2xl flex items-center justify-center shadow-md"
            role="alert"
          >
            Вы не согласны с условиями использования
          </div>
        )}

        <h1 className="font-montserrat text-white font-extrabold text-2xl text-center">
          Авторизация
        </h1>

        <form onSubmit={handleSubmit} className="mt-6 space-y-4">
          {/* Почта */}
          <div className="space-y-1">
            <label className="block font-montserrat font-extrabold text-xs text-[#ffffff]">
              Почта
            </label>
            <input
              type="email"
              value={email}
              onChange={(e) => setEmail(e.target.value)}
              className="w-full rounded-full bg-white px-4 py-2 text-sm font-montserrat text-black outline-none focus:ring-2 focus:ring-blue-200"
            />
            {!isEmailValid && email.length > 0 && (
              <p className="text-[11px] text-red-600 font-montserrat">
                Введите корректный email
              </p>
            )}
          </div>

          {/* Пароль */}
          <div className="space-y-1">
            <label className="block font-montserrat font-extrabold text-xs text-[#ffffff]">
              Пароль
            </label>
            <input
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full rounded-full bg-white px-4 py-2 text-sm font-montserrat text-black outline-none focus:ring-2 focus:ring-blue-200"
            />
          </div>

          {/* Чекбокс */}
          <div className="flex items-start space-x-2">
            <button
              type="button"
              onClick={() => {
                setRememberMe((prev) => !prev);
                if (!rememberMe) setCheckboxError(false);
              }}
              className={`w-5 h-5 rounded-full border border-white flex items-center justify-center ${
                rememberMe ? "bg-white" : "bg-transparent"
              }`}
            >
              {rememberMe && (
                <span className="h-2 w-2 rounded-full bg-[#90D2F9]" />
              )}
            </button>
            <p className="font-montserrat text-[10px] leading-[12px] text-white">
              Подтверждаю, что я прочитал условия использования данного
              приложения
            </p>
          </div>

          {/* Ошибка авторизации */}
          {authError && (
            <p className="text-[11px] text-red-600 font-montserrat">
              {authError}
            </p>
          )}

          {/* Ссылки */}
          <div className="flex justify-between text-[11px] font-montserrat font-bold text-[#FF6363] mt-1">
            <button
              type="button"
              className="hover:underline"
              onClick={() => router.push("/recPassword")}
            >
              Забыли пароль?
            </button>
            <button
              type="button"
              className="hover:underline"
              onClick={() => router.push("/reg")}
            >
              Регистрация
            </button>
          </div>

          {/* Кнопка Войти */}
          <button
            type="submit"
            disabled={!isFormValid}
            className={`mt-4 w-full rounded-full py-2 text-center font-montserrat font-extrabold text-sm transition-colors
              ${
                isFormValid
                  ? "bg-green-500 text-white hover:bg-green-600"
                  : "bg-white text-[#C4C4C4] cursor-not-allowed"
              }`}
          >
            Войти
          </button>
        </form>

        {/* Подсказка по тестовым логинам */}
        <div className="mt-4 text-[10px] text-white font-montserrat space-y-1">
          <p>Тестовые аккаунты:</p>
          <p>Пользователь: user@mail.com / user123</p>
          <p>Волонтёр: vol@mail.com / vol123</p>
          <p>Модератор: mod@mail.com / mod123</p>
        </div>
      </div>
    </div>
  );
};

export default AuthPage;