import React, { useState } from 'react';
import { useNavigate } from 'react-router-dom';
import { useAuth } from '../contexts/AuthContext';
import { EyeIcon, EyeSlashIcon } from '@heroicons/react/24/outline';
import LoadingSpinner from '../components/LoadingSpinner';

const Login = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [showPassword, setShowPassword] = useState(false);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState('');
  const { login } = useAuth();
  const navigate = useNavigate();

  const handleSubmit = async (e) => {
    e.preventDefault();
    setLoading(true);
    setError(''); // Clear previous errors

    try {
      const result = await login(email, password);
      if (result.success) {
        // Add a small delay to ensure the user sees the success message
        setTimeout(() => {
          navigate('/dashboard');
        }, 100);
      } else {
        setError(result.error || 'Login failed');
        console.error('Login failed:', result.error);
      }
    } catch (error) {
      setError('An unexpected error occurred');
      console.error('Login error:', error);
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
      <div className="max-w-md w-full space-y-8">
        <div>
          <div className="mx-auto h-12 w-12 flex items-center justify-center rounded-full bg-primary-100">
            <svg
              className="h-8 w-8 text-primary-600"
              fill="none"
              stroke="currentColor"
              viewBox="0 0 24 24"
            >
              <path
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth={2}
                d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.746 0 3.332.477 4.5 1.253v13C19.832 18.477 18.246 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"
              />
            </svg>
          </div>
          <h2 className="mt-6 text-center text-3xl font-extrabold text-gray-900">
            Sign in to CourseWorx
          </h2>
          <p className="mt-2 text-center text-sm text-gray-600">
            Manage your courses and track your progress
          </p>
        </div>
        <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
          <div className="rounded-md shadow-sm -space-y-px">
            <div>
              <label htmlFor="email" className="sr-only">
                Email address
              </label>
              <input
                id="email"
                name="email"
                type="email"
                autoComplete="email"
                required
                className="input-field rounded-t-lg"
                placeholder="Email address"
                value={email}
                onChange={(e) => setEmail(e.target.value)}
              />
            </div>
            <div className="relative">
              <label htmlFor="password" className="sr-only">
                Password
              </label>
              <input
                id="password"
                name="password"
                type={showPassword ? 'text' : 'password'}
                autoComplete="current-password"
                required
                className="input-field rounded-b-lg pr-10"
                placeholder="Password"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
              />
              <button
                type="button"
                className="absolute inset-y-0 right-0 pr-3 flex items-center"
                onClick={() => setShowPassword(!showPassword)}
              >
                {showPassword ? (
                  <EyeSlashIcon className="h-5 w-5 text-gray-400" />
                ) : (
                  <EyeIcon className="h-5 w-5 text-gray-400" />
                )}
              </button>
            </div>
          </div>

          {error && (
            <div className="rounded-md bg-red-50 p-4 border border-red-200">
              <div className="flex">
                <div className="flex-shrink-0">
                  <svg className="h-5 w-5 text-red-400" viewBox="0 0 20 20" fill="currentColor">
                    <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                  </svg>
                </div>
                <div className="ml-3">
                  <h3 className="text-sm font-medium text-red-800">
                    Login Error
                  </h3>
                  <div className="mt-2 text-sm text-red-700">
                    {error}
                  </div>
                </div>
              </div>
            </div>
          )}

          <div>
            <button
              type="submit"
              disabled={loading}
              className="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-primary-600 hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {loading ? (
                <LoadingSpinner size="sm" />
              ) : (
                'Sign in'
              )}
            </button>
          </div>

          <div className="text-center">
            <p className="text-sm text-gray-600">
              Demo Accounts:
            </p>
            <div className="mt-2 space-y-1 text-xs text-gray-500">
              <p>Super Admin: admin@courseworx.com / admin123</p>
              <p>Trainer: trainer@courseworx.com / trainer123</p>
              <p>Trainee: trainee@courseworx.com / trainee123</p>
            </div>
          </div>
        </form>
      </div>
    </div>
  );
};

export default Login;