'use client';

import { useState } from 'react';
import Link from 'next/link';
import { useRouter } from 'next/navigation';

export default function LoginPage() {
  const [formData, setFormData] = useState({
    email: '',
    password: ''
  });
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState('');
  const router = useRouter();

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setIsLoading(true);
    setError('');

    try {
      const response = await fetch('/api/auth/login', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify(formData),
      });

      if (response.ok) {
        router.push('/dashboard');
      } else {
        const data = await response.json();
        setError(data.error || 'Login failed');
      }
    } catch (err) {
      setError('Network error. Please try again.');
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-gradient-to-br from-blue-50 via-indigo-50 to-purple-50 flex items-center justify-center p-4">
      {/* Background Elements */}
      <div className="absolute inset-0 overflow-hidden">
        <div className="absolute top-20 left-20 w-32 h-32 bg-blue-300 bg-opacity-20 rounded-full blur-xl animate-pulse"></div>
        <div className="absolute top-40 right-32 w-24 h-24 bg-purple-300 bg-opacity-20 rounded-full blur-lg animate-bounce"></div>
        <div className="absolute bottom-32 left-1/3 w-40 h-40 bg-indigo-300 bg-opacity-15 rounded-full blur-xl animate-pulse"></div>
        <div className="absolute bottom-20 right-20 w-28 h-28 bg-blue-300 bg-opacity-20 rounded-full blur-lg animate-bounce"></div>
      </div>

      <div className="relative z-10 w-full max-w-md">
        {/* Logo and Header */}
        <div className="text-center mb-8">
          <div className="inline-flex items-center justify-center w-16 h-16 bg-gradient-to-br from-blue-600 to-purple-600 rounded-2xl mb-6 shadow-lg">
            <span className="text-white font-bold text-2xl">U</span>
          </div>
          <h1 className="text-3xl font-bold text-gray-900 mb-2">Welcome Back</h1>
          <p className="text-gray-600">Sign in to your university portal</p>
        </div>

        {/* Login Form */}
        <div className="bg-white rounded-3xl shadow-2xl p-8 border border-gray-100">
          <form onSubmit={handleSubmit} className="space-y-6">
            {/* Email Field */}
            <div>
              <label htmlFor="email" className="block text-sm font-medium text-gray-700 mb-2">
                Email Address
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <svg className="h-5 w-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M16 12a4 4 0 10-8 0 4 4 0 008 0zm0 0v1.5a2.5 2.5 0 005 0V12a9 9 0 10-9 9m4.5-1.206a8.959 8.959 0 01-4.5 1.207" />
                  </svg>
                </div>
                <input
                  type="email"
                  id="email"
                  required
                  className="block w-full pl-10 pr-3 py-3 border border-gray-300 rounded-xl focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200"
                  placeholder="Enter your email"
                  value={formData.email}
                  onChange={(e) => setFormData({ ...formData, email: e.target.value })}
                />
              </div>
            </div>

            {/* Password Field */}
            <div>
              <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-2">
                Password
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <svg className="h-5 w-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
                  </svg>
                </div>
                <input
                  type="password"
                  id="password"
                  required
                  className="block w-full pl-10 pr-3 py-3 border border-gray-300 rounded-xl focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200"
                  placeholder="Enter your password"
                  value={formData.password}
                  onChange={(e) => setFormData({ ...formData, password: e.target.value })}
                />
              </div>
            </div>

            {/* Error Message */}
            {error && (
              <div className="bg-red-50 border border-red-200 rounded-xl p-4">
                <div className="flex">
                  <svg className="h-5 w-5 text-red-400" fill="currentColor" viewBox="0 0 20 20">
                    <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>
                  <p className="ml-3 text-sm text-red-600">{error}</p>
                </div>
              </div>
            )}

            {/* Submit Button */}
            <button
              type="submit"
              disabled={isLoading}
              className="w-full bg-gradient-to-r from-blue-600 to-purple-600 text-white py-3 px-4 rounded-xl font-semibold hover:shadow-lg transform hover:scale-105 transition-all duration-300 disabled:opacity-50 disabled:cursor-not-allowed disabled:transform-none"
            >
              {isLoading ? (
                <div className="flex items-center justify-center">
                  <svg className="animate-spin -ml-1 mr-3 h-5 w-5 text-white" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                    <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                    <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                  </svg>
                  Signing in...
                </div>
              ) : (
                'Sign In'
              )}
            </button>
          </form>

          {/* Divider */}
          <div className="my-6">
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <div className="w-full border-t border-gray-300"></div>
              </div>
              <div className="relative flex justify-center text-sm">
                <span className="px-2 bg-white text-gray-500">Or continue with</span>
              </div>
            </div>
          </div>

          {/* Social Login Buttons */}
          <div className="space-y-3">
            <button className="w-full flex items-center justify-center px-4 py-3 border border-gray-300 rounded-xl text-gray-700 hover:bg-gray-50 transition-colors duration-200">
              <svg className="w-5 h-5 mr-3" viewBox="0 0 24 24">
                <path fill="#4285F4" d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"/>
                <path fill="#34A853" d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"/>
                <path fill="#FBBC05" d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"/>
                <path fill="#EA4335" d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"/>
              </svg>
              Continue with Google
            </button>
          </div>

          {/* Links */}
          <div className="mt-8 text-center space-y-4">
            <Link href="/forgot-password" className="text-sm text-blue-600 hover:text-blue-700 font-medium">
              Forgot your password?
            </Link>
            <div className="text-sm text-gray-600">
              Don't have an account?{' '}
              <Link href="/register" className="text-blue-600 hover:text-blue-700 font-medium">
                Sign up here
              </Link>
            </div>
          </div>
        </div>

        {/* Demo Credentials */}
        <div className="mt-8 bg-blue-50 rounded-2xl p-6 border border-blue-200">
          <h3 className="text-sm font-semibold text-blue-900 mb-3">Demo Credentials</h3>
          <div className="space-y-2 text-sm">
            <div className="flex justify-between">
              <span className="text-blue-700">Student:</span>
              <span className="text-blue-900 font-mono">student@test-university.edu</span>
            </div>
            <div className="flex justify-between">
              <span className="text-blue-700">Staff:</span>
              <span className="text-blue-900 font-mono">staff@test-university.edu</span>
            </div>
            <div className="flex justify-between">
              <span className="text-blue-700">Admin:</span>
              <span className="text-blue-900 font-mono">admin@test-university.edu</span>
            </div>
            <div className="text-center text-blue-700 font-medium mt-2">
              Password: <span className="font-mono">password123</span>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}