'use client';
import React, { useEffect, useState } from 'react';
import { useRouter } from 'next/navigation';
import Table from '@/components/Table';
import { Edit3, Users, Download, Eye, Upload } from 'lucide-react';
import StatusLabel from '@/components/StatusLabel';
import FileUpload from '@/components/FileUpload';
import { FE_PARENTS_EDIT_SUBSCRIPTION_URL } from '@/utils/Url';
import {
  fetchChildren,
  editRegisterForm,
} from '@/app/actions/subscriptionAction';
import logger from '@/utils/logger';
import { BASE_URL } from '@/utils/Url';
import { useEstablishment } from '@/context/EstablishmentContext';
import { useCsrfToken } from '@/context/CsrfContext';
import { useClasses } from '@/context/ClassesContext';

export default function ParentHomePage() {
  const [children, setChildren] = useState([]);
  const { user, selectedEstablishmentId } = useEstablishment();
  const [uploadingStudentId, setUploadingStudentId] = useState(null); // ID de l'étudiant pour l'upload
  const [uploadedFile, setUploadedFile] = useState(null); // Fichier uploadé
  const [uploadState, setUploadState] = useState('off'); // État "on" ou "off" pour l'affichage du composant
  const router = useRouter();
  const csrfToken = useCsrfToken();
  const [reloadFetch, setReloadFetch] = useState(false);
  const { getNiveauLabel } = useClasses();

  useEffect(() => {
    if (user !== null) {
      const userIdFromSession = user.user_id;
      fetchChildren(userIdFromSession, selectedEstablishmentId).then((data) => {
        setChildren(data);
      });
      setReloadFetch(false);
    }
  }, [selectedEstablishmentId, reloadFetch]);

  function handleView(eleveId) {
    logger.debug(`View dossier for student id: ${eleveId}`);
    router.push(
      `${FE_PARENTS_EDIT_SUBSCRIPTION_URL}?studentId=${eleveId}&enabled=false`
    );
  }

  function handleEdit(eleveId) {
    logger.debug(`Edit dossier for student id: ${eleveId}`);
    router.push(
      `${FE_PARENTS_EDIT_SUBSCRIPTION_URL}?studentId=${eleveId}&enabled=true`
    );
  }

  const handleFileUpload = (file) => {
    if (!file) {
      logger.error("Aucun fichier sélectionné pour l'upload.");
      return;
    }
    setUploadedFile(file); // Conserve le fichier en mémoire
    logger.debug('Fichier sélectionné :', file.name);
  };

  const handleSubmit = () => {
    if (!uploadedFile || !uploadingStudentId) {
      logger.error('Aucun fichier ou étudiant sélectionné.');
      return;
    }

    const jsonData = {
      status: 3,
    };
    const formData = new FormData();
    formData.append('data', JSON.stringify(jsonData));
    formData.append('sepa_file', uploadedFile); // Ajoute le fichier SEPA

    editRegisterForm(uploadingStudentId, formData, csrfToken)
      .then((response) => {
        logger.debug('RF mis à jour avec succès:', response);
        setReloadFetch(true);
        setUploadState('off');
      })
      .catch((error) => {
        logger.error('Erreur lors de la mise à jour du RF:', error);
      });
  };

  const toggleUpload = (studentId) => {
    if (uploadingStudentId === studentId && uploadState === 'on') {
      // Si le composant est déjà affiché pour cet étudiant, on le masque
      setUploadState('off');
      setUploadingStudentId(null);
      setUploadedFile(null); // Réinitialise le fichier
    } else {
      // Sinon, on l'affiche pour cet étudiant
      setUploadState('on');
      setUploadingStudentId(studentId);
    }
  };

  const childrenColumns = [
    {
      name: 'photo',
      transform: (row) => (
        <div className="flex justify-center items-center">
          {row.student.photo ? (
            <a
              href={`${BASE_URL}${row.student.photo}`} // Lien vers la photo
              target="_blank"
              rel="noopener noreferrer"
            >
              <img
                src={`${BASE_URL}${row.student.photo}`}
                alt={`${row.student.first_name} ${row.student.last_name}`}
                className="w-10 h-10 object-cover transition-transform duration-200 hover:scale-125 cursor-pointer rounded-full"
              />
            </a>
          ) : (
            <div className="w-10 h-10 flex items-center justify-center bg-gray-200 rounded-full">
              <span className="text-gray-500 text-sm font-semibold">
                {row.student.first_name[0]}
                {row.student.last_name[0]}
              </span>
            </div>
          )}
        </div>
      ),
    },
    { name: 'Nom', transform: (row) => `${row.student.last_name}` },
    { name: 'Prénom', transform: (row) => `${row.student.first_name}` },
    {
      name: 'Niveau',
      transform: (row) => (
        <div className="text-center">{getNiveauLabel(row.student.level)}</div>
      ),
    },
    {
      name: 'Statut',
      transform: (row) => (
        <div className="flex justify-center items-center">
          <StatusLabel status={row.status} showDropdown={false} parent />
        </div>
      ),
    },
    {
      name: 'Actions',
      transform: (row) => (
        <div className="flex justify-center items-center gap-2">
          {row.status === 2 && (
            <button
              className="text-blue-500 hover:text-blue-700"
              onClick={(e) => {
                e.stopPropagation();
                handleEdit(row.student.id);
              }}
              aria-label="Remplir le dossier"
            >
              <Edit3 className="h-5 w-5" />
            </button>
          )}

          {(row.status === 3 || row.status === 8) && (
            <button
              className="text-purple-500 hover:text-purple-700"
              onClick={(e) => {
                e.stopPropagation();
                handleView(row.student.id);
              }}
              aria-label="Visualiser le dossier"
            >
              <Eye className="h-5 w-5" />
            </button>
          )}

          {row.status === 7 && (
            <>
              <button
                className="flex items-center justify-center w-8 h-8 rounded-full text-purple-500 hover:text-purple-700"
                onClick={(e) => {
                  e.stopPropagation();
                  handleView(row.student.id);
                }}
                aria-label="Visualiser le dossier"
              >
                <Eye className="h-5 w-5" />
              </button>
              <a
                href={`${BASE_URL}${row.sepa_file}`}
                target="_blank"
                rel="noopener noreferrer"
                className="flex items-center justify-center w-8 h-8 rounded-full text-green-500 hover:text-green-700"
                aria-label="Télécharger le mandat SEPA"
              >
                <Download className="h-5 w-5" />
              </a>
              {/* Nouvelle action Upload */}
              <button
                className={`flex items-center justify-center w-8 h-8 rounded-full ${
                  uploadingStudentId === row.student.id && uploadState === 'on'
                    ? 'bg-blue-100 text-blue-600 ring-3 ring-blue-500'
                    : 'text-blue-500 hover:text-blue-700'
                }`}
                onClick={(e) => {
                  e.stopPropagation();
                  toggleUpload(row.student.id); // Activer ou désactiver l'upload pour cet étudiant
                }}
                aria-label="Uploader un fichier"
              >
                <Upload className="h-5 w-5" />
              </button>
            </>
          )}

          {row.status === 5 && (
            <button
              className="text-purple-500 hover:text-purple-700"
              onClick={(e) => {
                e.stopPropagation();
                handleView(row.student.id);
              }}
              aria-label="Visualiser le dossier"
            >
              <Eye className="h-5 w-5" />
            </button>
          )}
        </div>
      ),
    },
  ];

  return (
    <div className="px-2 py-4 md:px-4 max-w-full">
      <div>
        <h2 className="text-xl font-semibold mb-3 px-1 flex items-center gap-2">
          <Users className="h-6 w-6 text-emerald-600" />
          Enfants
        </h2>
        <div className="overflow-x-auto">
          <Table
            data={children}
            columns={childrenColumns}
            defaultTheme="bg-gray-50"
          />
        </div>
        {/* Composant FileUpload et bouton Valider en dessous du tableau */}
        {uploadState === 'on' && uploadingStudentId && (
          <div className="mt-4">
            <FileUpload
              selectionMessage="Sélectionnez un fichier à uploader"
              onFileSelect={handleFileUpload}
            />
            <button
              className={`mt-4 px-6 py-2 rounded-md ${
                uploadedFile
                  ? 'bg-emerald-500 text-white hover:bg-emerald-600'
                  : 'bg-gray-300 text-gray-700 cursor-not-allowed'
              }`}
              onClick={handleSubmit}
              disabled={!uploadedFile}
            >
              Valider
            </button>
          </div>
        )}
      </div>
    </div>
  );
}