import React, { useState } from 'react';
import { LogIn, Eye, EyeOff, School, GraduationCap, User } from 'lucide-react';
import { useAuth } from '../../hooks/useAuth';
import { useNavigate } from 'react-router-dom';
import { supabase } from '../../lib/supabase';

interface LoginFormProps {
  userType: 'school' | 'teacher' | 'student';
  onLogin?: (credentials: { email: string; password: string }) => Promise<void>;
  onRegisterClick?: () => void;
}

const userTypeIcons = {
  school: <School className="h-8 w-8 text-purple-600" />,
  teacher: <GraduationCap className="h-8 w-8 text-purple-600" />,
  student: <User className="h-8 w-8 text-purple-600" />
};

const userTypeLabels = {
  school: 'Escola',
  teacher: 'Professor',
  student: 'Aluno'
};

export function LoginForm({ userType, onLogin, onRegisterClick }: LoginFormProps) {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [showPassword, setShowPassword] = useState(false);
  const [error, setError] = useState('');
  const [loading, setLoading] = useState(false);
  const { signIn } = useAuth();
  const navigate = useNavigate();

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError('');
    setLoading(true);
    
    try {
      const { data, error } = await supabase.auth.signInWithPassword({
        email: email,
        password: password
      });

      if (error) throw error;

      if (!data.user) {
        throw new Error('Usuário não encontrado');
      }

      const userRole = data.user.user_metadata?.role;
      
      if (userRole !== userType) {
        throw new Error(`Este não é um login de ${userTypeLabels[userType]}`);
      }

      switch (userType) {
        case 'school':
          navigate('/dashboard');
          break;
        case 'teacher':
          navigate('/professor');
          break;
        case 'student':
          navigate('/aluno');
          break;
        default:
          throw new Error('Tipo de usuário inválido');
      }

    } catch (err) {
      console.error('Erro no login:', err);
      if (err instanceof Error) {
        setError(err.message);
      } else {
        setError('Email ou senha incorretos');
      }
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-gradient-to-b from-purple-50 to-white py-12">
      <div className="max-w-md mx-auto px-4">
        <div className="text-center mb-8">
          <div className="inline-flex items-center justify-center w-16 h-16 rounded-full bg-purple-100 mb-4">
            {userTypeIcons[userType]}
          </div>
          <h1 className="text-3xl font-bold text-gray-900 mb-2">
            Bem-vindo de volta!
          </h1>
          <p className="text-gray-600">
            Faça login como {userTypeLabels[userType]}
          </p>
        </div>

        {error && (
          <div className="mb-6 p-4 bg-red-50 border border-red-200 rounded-lg text-red-600">
            {error}
          </div>
        )}

        <div className="bg-white rounded-2xl shadow-xl p-8">
          <form onSubmit={handleSubmit} className="space-y-6">
            <div>
              <label htmlFor="email" className="block text-sm font-medium text-gray-700">
                Email
              </label>
              <input
                id="email"
                type="email"
                required
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                className="mt-1 block w-full rounded-lg border-gray-300 shadow-sm focus:border-purple-500 focus:ring-purple-500"
              />
            </div>

            <div>
              <label htmlFor="password" className="block text-sm font-medium text-gray-700">
                Senha
              </label>
              <div className="relative mt-1">
                <input
                  id="password"
                  type={showPassword ? 'text' : 'password'}
                  required
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  className="block w-full rounded-lg border-gray-300 shadow-sm focus:border-purple-500 focus:ring-purple-500 pr-10"
                />
                <button
                  type="button"
                  onClick={() => setShowPassword(!showPassword)}
                  className="absolute inset-y-0 right-0 pr-3 flex items-center"
                >
                  {showPassword ? (
                    <EyeOff className="h-5 w-5 text-gray-400" />
                  ) : (
                    <Eye className="h-5 w-5 text-gray-400" />
                  )}
                </button>
              </div>
            </div>

            <button
              type="submit"
              disabled={loading}
              className="w-full flex justify-center items-center gap-2 py-3 px-4 border border-transparent rounded-lg shadow-sm text-white bg-purple-600 hover:bg-purple-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-purple-500 disabled:opacity-50"
            >
              {loading ? (
                'Entrando...'
              ) : (
                <>
                  <LogIn className="h-5 w-5" />
                  Entrar
                </>
              )}
            </button>
          </form>

          {onRegisterClick && (
            <div className="mt-6 text-center">
              <p className="text-sm text-gray-600">
                Ainda não tem uma conta?{' '}
                <button
                  onClick={onRegisterClick}
                  className="text-purple-600 hover:text-purple-500 font-medium"
                >
                  Cadastre-se
                </button>
              </p>
            </div>
          )}
        </div>
      </div>
    </div>
  );
}