import React, { useState } from 'react';
import { Link } from 'react-router-dom';
import { AuthLayout } from '../components/AuthLayout';
import { AuthInput } from '../components/AuthInput';
import { AuthButton } from '../components/AuthButton';
import { usePasswordReset } from '../hooks/usePasswordReset';
import type { ForgotPasswordFormData } from '../types';

export function ForgotPasswordPage() {
  const { handleRequestReset, loading, error, success } = usePasswordReset();
  const [formData, setFormData] = useState<ForgotPasswordFormData>({
    email: '',
  });
  const [errors, setErrors] = useState<Partial<Record<keyof ForgotPasswordFormData, string>>>({});

  const validate = (): boolean => {
    const newErrors: Partial<Record<keyof ForgotPasswordFormData, string>> = {};
    
    if (!formData.email) {
      newErrors.email = 'Email requis';
    } else if (!/\S+@\S+\.\S+/.test(formData.email)) {
      newErrors.email = 'Email invalide';
    }
    
    setErrors(newErrors);
    return Object.keys(newErrors).length === 0;
  };

  const handleChange = (field: keyof ForgotPasswordFormData, value: string) => {
    setFormData({ ...formData, [field]: value });
    // Clear error for this field when user starts typing
    if (errors[field]) {
      setErrors({ ...errors, [field]: undefined });
    }
  };

  const handleBlur = (field: keyof ForgotPasswordFormData) => {
    const value = formData[field];
    let error: string | undefined;
    
    if (field === 'email') {
      if (!value) {
        error = 'Email requis';
      } else if (!/\S+@\S+\.\S+/.test(value)) {
        error = 'Email invalide';
      }
    }
    
    if (error) {
      setErrors({ ...errors, [field]: error });
    } else {
      setErrors({ ...errors, [field]: undefined });
    }
  };

  const onSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (validate()) {
      await handleRequestReset(formData);
    }
  };

  return (
    <AuthLayout
      title="Mot de passe oublié"
      subtitle="Entrez votre email pour recevoir un lien de réinitialisation"
      footerLinks={[
        { label: 'Retour à la connexion', to: '/login' },
      ]}
    >
      {success ? (
        <div className="text-center space-y-4" role="status" aria-live="polite">
          <div 
            className="bg-green-50 border border-green-200 text-green-700 px-4 py-3 rounded"
            role="alert"
            aria-live="assertive"
          >
            <p className="font-medium">Email envoyé !</p>
            <p className="text-sm mt-1">
              Un lien de réinitialisation a été envoyé à {formData.email}
            </p>
          </div>
          <p className="text-sm text-gray-600">
            Veuillez vérifier votre boîte mail et cliquer sur le lien pour réinitialiser votre mot de passe.
          </p>
          <Link
            to="/login"
            className="text-blue-600 hover:underline text-sm block focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 rounded"
          >
            Retour à la connexion
          </Link>
        </div>
      ) : (
        <form onSubmit={onSubmit} className="space-y-4" aria-label="Formulaire de réinitialisation de mot de passe">
          {error && (
            <div 
              className="bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded"
              role="alert"
              aria-live="assertive"
            >
              {error.message}
            </div>
          )}
          <AuthInput
            type="email"
            label="Email"
            value={formData.email}
            onChange={(e) => handleChange('email', e.target.value)}
            onBlur={() => handleBlur('email')}
            error={errors.email}
            required
            autoComplete="email"
          />
          <AuthButton type="submit" loading={loading}>
            Envoyer le lien de réinitialisation
          </AuthButton>
        </form>
      )}
    </AuthLayout>
  );
}

export default ForgotPasswordPage;
