"use client";
import { useState, useEffect, Suspense } from "react";
import { useSearchParams, useRouter } from "next/navigation";
import Link from "next/link";
import { ROUTES, API_BASE_URL } from "@/utils/constants";

function ResetPasswordForm() {
  const searchParams = useSearchParams();
  const router = useRouter();
  const token = searchParams.get("token");

  const [password, setPassword] = useState("");
  const [confirmPassword, setConfirmPassword] = useState("");
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [isSuccess, setIsSuccess] = useState(false);
  const [error, setError] = useState("");
  const [showPassword, setShowPassword] = useState(false);

  useEffect(() => {
    if (!token) {
      setError("Token de réinitialisation manquant. Veuillez demander un nouveau lien.");
    }
  }, [token]);

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

    // Validation
    if (password.length < 8) {
      setError("Le mot de passe doit contenir au moins 8 caractères");
      return;
    }

    if (password !== confirmPassword) {
      setError("Les mots de passe ne correspondent pas");
      return;
    }

    setIsSubmitting(true);

    try {
      const response = await fetch(`${API_BASE_URL}/auth/reset-password`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({ token, password, confirmPassword }),
      });

      const data = await response.json();

      if (data.success) {
        setIsSuccess(true);
        // Redirection après 3 secondes
        setTimeout(() => {
          router.push(ROUTES.LOGIN);
        }, 3000);
      } else {
        setError(data.message || 'Une erreur est survenue');
      }
    } catch (err) {
      setError('Erreur de connexion au serveur');
      console.error('Reset password error:', err);
    } finally {
      setIsSubmitting(false);
    }
  };

  if (isSuccess) {
    return (
      <div className="min-h-screen bg-gray-50 flex items-center justify-center py-12 px-4">
        <div className="w-full max-w-md">
          <div className="text-center mb-8">
            <h1 className="text-4xl font-bold text-gray-900 mb-2">Mot de passe modifié !</h1>
          </div>

          <div className="bg-white rounded-xl shadow-md p-8">
            <div className="text-center">
              <div className="mx-auto w-16 h-16 bg-green-100 rounded-full flex items-center justify-center mb-4">
                <svg className="w-8 h-8 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
                </svg>
              </div>

              <h2 className="text-xl font-bold text-gray-900 mb-2">
                Votre mot de passe a été réinitialisé
              </h2>

              <p className="text-gray-600 mb-6">
                Vous allez être redirigé vers la page de connexion...
              </p>

              <Link
                href={ROUTES.LOGIN}
                className="inline-flex items-center justify-center w-full bg-[#1a4d2e] hover:bg-[#2d5a3d] text-white font-bold px-8 py-4 rounded-lg transition-all"
              >
                Se connecter maintenant
              </Link>
            </div>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gray-50 flex items-center justify-center py-12 px-4">
      <div className="w-full max-w-md">

        {/* Title */}
        <div className="text-center mb-8">
          <h1 className="text-4xl font-bold text-gray-900 mb-2">Nouveau mot de passe</h1>
          <p className="text-gray-600">
            Choisissez un nouveau mot de passe sécurisé
          </p>
        </div>

        {/* Main Card */}
        <div className="bg-white rounded-xl shadow-md overflow-hidden">
          <div className="p-8">

            {/* Error Message */}
            {error && (
              <div className="mb-4 p-4 bg-red-50 border-l-4 border-red-500 text-red-700">
                {error}
              </div>
            )}

            {/* Form */}
            <form onSubmit={handleSubmit} className="space-y-6">

              {/* New Password */}
              <div>
                <label htmlFor="password" className="block text-sm font-semibold text-gray-900 mb-2">
                  Nouveau mot de passe <span className="text-red-700 font-bold" aria-hidden="true">*</span>
                  <span className="sr-only">(obligatoire)</span>
                </label>
                <div className="relative">
                  <input
                    id="password"
                    type={showPassword ? "text" : "password"}
                    required
                    minLength={8}
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    placeholder="Minimum 8 caractères"
                    className="w-full px-4 py-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-[#1a4d2e] focus:border-transparent pr-12"
                    disabled={!token}
                  />
                  <button
                    type="button"
                    onClick={() => setShowPassword(!showPassword)}
                    className="absolute right-3 top-1/2 -translate-y-1/2 text-gray-500 hover:text-gray-700"
                    aria-label={showPassword ? "Masquer le mot de passe" : "Afficher le mot de passe"}
                  >
                    {showPassword ? (
                      <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.88 9.88l-3.29-3.29m7.532 7.532l3.29 3.29M3 3l3.59 3.59m0 0A9.953 9.953 0 0112 5c4.478 0 8.268 2.943 9.543 7a10.025 10.025 0 01-4.132 5.411m0 0L21 21" />
                      </svg>
                    ) : (
                      <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                      </svg>
                    )}
                  </button>
                </div>
              </div>

              {/* Confirm Password */}
              <div>
                <label htmlFor="confirmPassword" className="block text-sm font-semibold text-gray-900 mb-2">
                  Confirmer le mot de passe <span className="text-red-700 font-bold" aria-hidden="true">*</span>
                  <span className="sr-only">(obligatoire)</span>
                </label>
                <input
                  id="confirmPassword"
                  type={showPassword ? "text" : "password"}
                  required
                  minLength={8}
                  value={confirmPassword}
                  onChange={(e) => setConfirmPassword(e.target.value)}
                  placeholder="Répétez le mot de passe"
                  className="w-full px-4 py-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-[#1a4d2e] focus:border-transparent"
                  disabled={!token}
                />
              </div>

              {/* Password Requirements */}
              <div className="bg-gray-50 p-4 rounded-lg">
                <p className="text-sm font-semibold text-gray-900 mb-2">Le mot de passe doit contenir :</p>
                <ul className="text-sm text-gray-600 space-y-1">
                  <li className={`flex items-center gap-2 ${password.length >= 8 ? 'text-green-600' : ''}`}>
                    {password.length >= 8 ? (
                      <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                        <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
                      </svg>
                    ) : (
                      <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                        <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-11a1 1 0 10-2 0v3.586L7.707 9.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l3-3a1 1 0 00-1.414-1.414L11 10.586V7z" clipRule="evenodd" />
                      </svg>
                    )}
                    Au moins 8 caractères
                  </li>
                  <li className={`flex items-center gap-2 ${password === confirmPassword && password.length > 0 ? 'text-green-600' : ''}`}>
                    {password === confirmPassword && password.length > 0 ? (
                      <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                        <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
                      </svg>
                    ) : (
                      <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                        <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-11a1 1 0 10-2 0v3.586L7.707 9.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l3-3a1 1 0 00-1.414-1.414L11 10.586V7z" clipRule="evenodd" />
                      </svg>
                    )}
                    Les mots de passe correspondent
                  </li>
                </ul>
              </div>

              {/* Submit Button */}
              <button
                type="submit"
                disabled={isSubmitting || !token}
                className="w-full bg-[#1a4d2e] hover:bg-[#2d5a3d] disabled:bg-gray-400 text-white font-bold px-8 py-4 rounded-lg transition-all"
              >
                {isSubmitting ? "Modification en cours..." : "Réinitialiser le mot de passe"}
              </button>

              {/* Back to Login */}
              <div className="text-center">
                <Link
                  href={ROUTES.LOGIN}
                  className="text-sm text-[#1a4d2e] hover:text-[#f59e0b] hover:underline font-semibold transition-colors"
                >
                  Retour à la connexion
                </Link>
              </div>
            </form>

          </div>
        </div>
      </div>
    </div>
  );
}

export default function ResetPasswordPage() {
  return (
    <Suspense fallback={
      <div className="min-h-screen bg-gray-50 flex items-center justify-center">
        <div className="text-center">
          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-[#1a4d2e] mx-auto mb-4"></div>
          <p className="text-gray-600">Chargement...</p>
        </div>
      </div>
    }>
      <ResetPasswordForm />
    </Suspense>
  );
}
