import { useState } from 'react';
import { useNavigate, Link } from 'react-router-dom';
import { useAuth } from '../../lib/authContext';

import { Button } from '../ui/button';
import { Input } from '../ui/input';
import { Label } from '../ui/label';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '../ui/card';
import { BookOpen, Mail } from 'lucide-react';
import { useLanguage } from '../../lib/languageContext';
import { translations } from '../../lib/translations';
import { LanguageSwitcher } from '../LanguageSwitcher';

export function SignIn() {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const { signIn } = useAuth();
  const { language } = useLanguage();
  const t = translations[language].auth;
  const navigate = useNavigate();

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

    try {
      const user = await signIn(email, password);
      const role = user?.role?.toLowerCase();
      const approval = user?.sheikhApprovalStatus?.toLowerCase();
      console.log(approval);
      
      if (role === 'student') {
        navigate('/student/dashboard');
      } else if (role === 'admin') {
        navigate('/admin/dashboard');
      } else if (role === 'sheikh') {
        if(approval ==='rejected'){
          navigate('/sheikh/interview');
        }
        else if (!user.profileCompleted) {
          navigate('/complete-profile/sheikh');
        } else if (approval === 'approved') {
          navigate('/sheikh/dashboard');
        } else {
          navigate('/sheikh/interview');
        }
      } else {
        navigate('/');
      }
    } catch (err) {
      console.error('Login error:', err);
      setError(err instanceof Error ? err.message : 'Login failed');
      setLoading(false);
    }
  };

  const handleGoogleSignIn = async () => {
    navigate('/auth/google');
  };

  const handleForgotPassword = () => {
    navigate('/forgot-password');
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-emerald-50 to-teal-50 p-4">
      <div className="absolute top-4 right-4">
        <LanguageSwitcher />
      </div>

      <Card className="w-full max-w-md">
        <CardHeader className="text-center">
          <div className="flex justify-center mb-4">
            <div className="w-16 h-16 bg-emerald-600 rounded-full flex items-center justify-center">
              <BookOpen className="h-8 w-8 text-white" />
            </div>
          </div>
          <CardTitle>{t.welcomeTitle}</CardTitle>
          <CardDescription>{t.welcomeDescription}</CardDescription>
        </CardHeader>

        <CardContent className="space-y-4">
          {/* Google Login */}
          <Button
            variant="outline"
            className="w-full gap-2"
            onClick={handleGoogleSignIn}
            disabled={loading}
          >
            {t.signInWithGoogle}
          </Button>

          <div className="relative">
            <div className="absolute inset-0 flex items-center">
              <span className="w-full border-t" />
            </div>
            <div className="relative flex justify-center">
              <span className="bg-white px-2 text-muted-foreground">{t.orContinueWith}</span>
            </div>
          </div>

          {/* Email / Password */}
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="email">{t.emailLabel}</Label>
              <div className="relative">
                <Mail className="absolute left-3 top-3 h-4 w-4 text-muted-foreground" />
                <Input
                  id="email"
                  type="email"
                  value={email}
                  placeholder={language === 'ar' ? 'ادخل الايميل' : 'Enter your email'}
                  onChange={(e) => setEmail(e.target.value)}
                  className="pl-10"
                  required
                />
              </div>
            </div>

            <div className="space-y-2">
              <div className="flex justify-between items-center">
                <Label htmlFor="password">{t.passwordLabel}</Label>
                <button
                  type="button"
                  onClick={handleForgotPassword}
                  className="text-sm text-emerald-600 hover:text-emerald-700 hover:underline"
                >
                  {t.forgotPassword || 'Forgot password?'}
                </button>
              </div>
              <Input
                id="password"
                type="password"
                placeholder={language === 'ar' ? 'ادخل الباسورد' : 'Enter your password'}
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                required
              />
            </div>

            {error && (
              <p className="text-red-600 text-sm text-center">{error}</p>
            )}

            <Button
              type="submit"
              className="w-full bg-emerald-600"
              disabled={loading}
            >
              {loading ? `${t.signInButton}...` : t.signInButton}
            </Button>
          </form>

          <div className="text-center">
            <Link to="/register" className="text-emerald-600 hover:underline">
              {t.noAccount} {t.signUpLink}
            </Link>
          </div>
        </CardContent>
      </Card>
    </div>
  );
}