'use client'
import React, { useState, useEffect } from 'react';
import Table from '@/components/Table';
import {mockFicheInscription} from '@/data/mockFicheInscription';
import Tab from '@/components/Tab';
import { useTranslations } from 'next-intl';
import StatusLabel  from '@/components/StatusLabel';
import { Search } from 'lucide-react';
import Popup from '@/components/Popup';
import Loader from '@/components/Loader';
import AlertWithModal from '@/components/AlertWithModal';
import DropdownMenu from "@/components/DropdownMenu";
import { formatPhoneNumber } from '@/utils/Telephone';
import { MoreVertical, Send, Edit, Trash2, FileText,  CheckCircle, Plus } from 'lucide-react';
import Modal from '@/components/Modal';
import InscriptionForm from '@/components/Inscription/InscriptionForm'
import AffectationClasseForm from '@/components/AffectationClasseForm'

import {
  PENDING,
  SUBSCRIBED,
  ARCHIVED,
  fetchRegisterForms,
  createRegisterForm,
  sendRegisterForm,
  archiveRegisterForm,
  fetchRegisterFormFileTemplate,
  fetchStudents,
  editRegisterForm } from "@/app/actions/subscriptionAction"

import {
  fetchClasses,
  fetchRegistrationDiscounts,
  fetchTuitionDiscounts,
  fetchRegistrationFees,
  fetchTuitionFees } from '@/app/actions/schoolAction';

import { createProfile } from '@/app/actions/authAction';

import {
  BASE_URL,
  FE_ADMIN_SUBSCRIPTIONS_EDIT_URL } from '@/utils/Url';

import DjangoCSRFToken from '@/components/DjangoCSRFToken'
import { useCsrfToken } from '@/context/CsrfContext';
import { fetchRegistrationFileGroups } from '@/app/actions/registerFileGroupAction';
import { ESTABLISHMENT_ID } from '@/utils/Url';
import logger from '@/utils/logger';

const useFakeData = process.env.NEXT_PUBLIC_USE_FAKE_DATA === 'true';

export default function Page({ params: { locale } }) {
  const t = useTranslations('subscriptions');
  const [registrationForms, setRegistrationForms] = useState([]);
  const [registrationFormsDataPending, setRegistrationFormsDataPending] = useState([]);
  const [registrationFormsDataSubscribed, setRegistrationFormsDataSubscribed] = useState([]);
  const [registrationFormsDataArchived, setRegistrationFormsDataArchived] = useState([]);
  // const [filter, setFilter] = useState('*');
  const [searchTerm, setSearchTerm] = useState('');
  const [alertPage, setAlertPage] = useState(false);
  const [isLoading, setIsLoading] = useState(false);
  const [popup, setPopup] = useState({ visible: false, message: '', onConfirm: null });
  const [activeTab, setActiveTab] = useState('pending');
  const [currentPage, setCurrentPage] = useState(1);
  const [totalPages, setTotalPages] = useState(1);
  const [totalPending, setTotalPending] = useState(0);
  const [totalSubscribed, setTotalSubscribed] = useState(0);
  const [totalArchives, setTotalArchives] = useState(0);
  const [itemsPerPage, setItemsPerPage] = useState(5); // Définir le nombre d'éléments par page

  const [fichiers, setFichiers] = useState([]);
  const [isOpen, setIsOpen] = useState(false);
  const [isOpenAffectationClasse, setIsOpenAffectationClasse] = useState(false);
  const [student, setStudent] = useState('');
  const [classes, setClasses] = useState([]);
  const [students, setEleves] = useState([]);
  const [reloadFetch, setReloadFetch] = useState(false);


  const [registrationDiscounts, setRegistrationDiscounts] = useState([]);
  const [tuitionDiscounts, setTuitionDiscounts] = useState([]);
  const [registrationFees, setRegistrationFees] = useState([]);
  const [tuitionFees, setTuitionFees] = useState([]);
  const [groups, setGroups] = useState([]);

  const csrfToken = useCsrfToken();

  const openModal = () => {
    setIsOpen(true);
  }

  const closeModal = () => {
    setIsOpen(false);

  }

  const openModalAssociationEleve = (eleveSelected) => {
    setIsOpenAffectationClasse(true);
    setStudent(eleveSelected);
  }

  const requestErrorHandler = (err)=>{
    logger.error('Error fetching data:', err);
  }

  /**
   * Handles the pending data for the registration form.
   *
   * @param {Object} data - The data object containing registration forms and count.
   * @param {Array} data.registerForms - The array of registration forms.
   * @param {number} data.count - The total count of registration forms.
   */
  const registerFormPendingDataHandler = (data) => {
    if (data) {
      const { registerForms, count, page_size } = data;
      if (registerForms) {
        setRegistrationFormsDataPending(registerForms);
      }
      const calculatedTotalPages = count === 0 ? 1 : Math.ceil(count / page_size);
      setTotalPending(count);
      setTotalPages(calculatedTotalPages);
    }
  }



  /**
   * Handles the data received from the subscription registration form.
   *
   * @param {Object} data - The data object received from the subscription registration form.
   * @param {Array} data.registerForms - An array of registration forms.
   * @param {number} data.count - The total count of subscribed forms.
   */
  const registerFormSubscribedDataHandler = (data) => {
    if (data) {
      const { registerForms, count, page_size } = data;
      setTotalSubscribed(count);
      if (registerForms) {
        setRegistrationFormsDataSubscribed(registerForms);
      }
    }
  }


/**
 * Handles the archived data for the register form.
 *
 * @param {Object} data - The data object containing archived register forms and count.
 * @param {Array} data.registerForms - The array of archived register forms.
 * @param {number} data.count - The total count of archived register forms.
 */
const registerFormArchivedDataHandler = (data) => {
  if (data) {
    const { registerForms, count, page_size } = data;

    setTotalArchives(count);
    if (registerForms) {
      setRegistrationFormsDataArchived(registerForms);
    }
  }
}

useEffect(() => {
    const fetchInitialData = async () => {
        try {
            const [classesData, studentsData] = await Promise.all([
                fetchClasses(),
                fetchStudents()
            ]);

            setClasses(classesData);
            setEleves(studentsData);
            logger.debug('Success - Classes:', classesData);
            logger.debug('Success - Students:', studentsData);
        } catch (error) {
            logger.error('Error fetching initial data:', error);
        }
    };

    fetchInitialData();
}, []);


  useEffect(() => {
    const fetchDataAndSetState = () => {

      setIsLoading(true);
      if (!useFakeData) {
        fetchRegisterForms(PENDING, currentPage, itemsPerPage, searchTerm)
        .then(registerFormPendingDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterForms(SUBSCRIBED)
        .then(registerFormSubscribedDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterForms(ARCHIVED)
        .then(registerFormArchivedDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterFormFileTemplate()
        .then((data)=> {
          logger.debug(data);

          setFichiers(data)
          })
        .catch((err)=>{ err = err.message; logger.debug(err);})
        fetchRegistrationDiscounts()
        .then(data => {
          setRegistrationDiscounts(data);
        })
        .catch(requestErrorHandler)
        fetchTuitionDiscounts()
        .then(data => {
          setTuitionDiscounts(data);
        })
        .catch(requestErrorHandler)
        fetchRegistrationFees()
        .then(data => {
          setRegistrationFees(data);
        })
        .catch(requestErrorHandler)
        fetchTuitionFees()
        .then(data => {
          setTuitionFees(data);
        })
        .catch(requestErrorHandler);
        fetchRegistrationFileGroups()
        .then(data => {
          setGroups(data);
        })
        .catch(error => logger.error('Error fetching file groups:', error));
      } else {
        setTimeout(() => {
          setRegistrationFormsDataPending(mockFicheInscription);
        }, 1000);
      }
      setIsLoading(false);
      setReloadFetch(false);
    };


    fetchDataAndSetState();
  }, [reloadFetch, currentPage]);

useEffect(() => {
      const fetchDataAndSetState = () => {

      setIsLoading(true);
      if (!useFakeData) {
        fetchRegisterForms(PENDING, currentPage, itemsPerPage, searchTerm)
        .then(registerFormPendingDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterForms(SUBSCRIBED)
        .then(registerFormSubscribedDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterForms(ARCHIVED)
        .then(registerFormArchivedDataHandler)
        .catch(requestErrorHandler)
        fetchRegisterFormFileTemplate()
        .then((data)=> {setFichiers(data)})
        .catch((err)=>{ err = err.message; logger.debug(err);});
      } else {
        setTimeout(() => {
          setRegistrationFormsDataPending(mockFicheInscription);
        }, 1000);
      }
      setIsLoading(false);
      setReloadFetch(false);
    };

const timeoutId = setTimeout(() => {
    fetchDataAndSetState();
    }, 500); // Debounce la recherche
    return () => clearTimeout(timeoutId);
}, [searchTerm]);

/**
 * UseEffect to update page count of tab
 */
useEffect(()=>{
  if (activeTab === 'pending') {
    setTotalPages(Math.ceil(totalPending / itemsPerPage));
  } else if (activeTab === 'subscribed') {
    setTotalPages(Math.ceil(totalSubscribed / itemsPerPage));
  } else if (activeTab === 'archived') {
    setTotalPages(Math.ceil(totalArchives / itemsPerPage));
  }
},[currentPage]);
  /**
   * Archives a registration form after user confirmation.
   *
   * @param {number} id - The ID of the registration form to be archived.
   * @param {string} nom - The last name of the person whose registration form is being archived.
   * @param {string} prenom - The first name of the person whose registration form is being archived.
   */
  const archiveFicheInscription = (id, nom, prenom) => {
    setPopup({
      visible: true,
      message: `Attentions ! \nVous êtes sur le point d'archiver le dossier d'inscription de ${nom} ${prenom}\nÊtes-vous sûr(e) de vouloir poursuivre l'opération ?`,
      onConfirm: () => {
      archiveRegisterForm(id)
          .then(data => {
            logger.debug('Success:', data);
            setRegistrationForms(registrationForms.filter(fiche => fiche.id !== id));
            setReloadFetch(true);
            alert("Le dossier d'inscription a été correctement archivé");
          })
          .catch(error => {
            logger.error('Error archiving data:', error);
            alert("Erreur lors de l'archivage du dossier d'inscription.\nContactez l'administrateur.");
          });
      }
    });
  };

  const sendConfirmRegisterForm = (id, nom, prenom) => {
    setPopup({
      visible: true,
      message: `Avertissement ! \nVous êtes sur le point d'envoyer un dossier d'inscription à ${nom} ${prenom}\nÊtes-vous sûr(e) de vouloir poursuivre l'opération ?`,
      onConfirm: () => {
        sendRegisterForm(id).then(data => {
            logger.debug('Success:', data);
            setReloadFetch(true);
          })
          .catch(error => {
            logger.error('Error fetching data:', error);
          });
      }
    });
  };

  const affectationClassFormSubmitHandler = (formdata)=> {
    editRegisterForm(student.id,formData, csrfToken)
    .then(data => {
        logger.debug('Success:', data);
        setReloadFetch(true);
      })
      .catch(error => {
        logger.error('Error :', error);
      });
  }

  const updateStatusAction = (id, newStatus) => {
    logger.debug('Edit fiche inscription with id:', id);
  };

  const handleSearchChange = (event) => {
    setSearchTerm(event.target.value);
  };

  const handlePageChange = (newPage) => {
    setCurrentPage(newPage);
  };

  const createRF = (updatedData) => {
    logger.debug('createRF updatedData:', updatedData);
    const selectedRegistrationFeesIds = updatedData.selectedRegistrationFees.map(feeId => feeId)
    const selectedRegistrationDiscountsIds = updatedData.selectedRegistrationDiscounts.map(discountId => discountId)
    const selectedTuitionFeesIds = updatedData.selectedTuitionFees.map(feeId => feeId)
    const selectedTuitionDiscountsIds = updatedData.selectedTuitionDiscounts.map(discountId => discountId)
    const selectedFileGroup = updatedData.selectedFileGroup
    const allFeesIds = [...selectedRegistrationFeesIds, ...selectedTuitionFeesIds];
    const allDiscountsds = [...selectedRegistrationDiscountsIds, ...selectedTuitionDiscountsIds];

    if (updatedData.selectedGuardians.length !== 0) {
      const selectedGuardiansIds = updatedData.selectedGuardians.map(guardianId => guardianId)
      const data = {
          student: {
              last_name: updatedData.studentLastName,
              first_name: updatedData.studentFirstName,
          },
          idGuardians: selectedGuardiansIds,
          fees: allFeesIds,
          discounts: allDiscountsds,
          fileGroup: selectedFileGroup,
          establishment: ESTABLISHMENT_ID
      };

      createRegisterForm(data, csrfToken)
        .then(data => {
          // Mise à jour immédiate des données
          setRegistrationFormsDataPending(prevState => [...(prevState || []), data]);
          setTotalPending(prev => prev + 1);
          if (updatedData.autoMail) {
            sendConfirmRegisterForm(data.student.id, updatedData.studentLastName, updatedData.studentFirstName);
          }
          closeModal();
          // Forcer le rechargement complet des données
          setReloadFetch(true);
        })
        .catch((error) => {
          logger.error('Error:', error);
        });
    } else {
      const data = {
        email: updatedData.guardianEmail,
        password: 'Provisoire01!',
        username: updatedData.guardianEmail,
        is_active: 0,
        droit: 2
      }

      createProfile(data, csrfToken)
        .then(response => {
          if (response.id) {
            const data = {
              student: {
                last_name: updatedData.studentLastName,
                first_name: updatedData.studentFirstName,
                guardians: [{
                  email: updatedData.guardianEmail,
                  phone: updatedData.guardianPhone,
                  associated_profile: response.id
                }],
                sibling: []
              },
              fees: allFeesIds,
              discounts: allDiscountsds,
              establishment: ESTABLISHMENT_ID
            };

            createRegisterForm(data, csrfToken)
              .then(data => {
                // Mise à jour immédiate des données
                setRegistrationFormsDataPending(prevState => [...(prevState || []), data]);
                setTotalPending(prev => prev + 1);
                if (updatedData.autoMail) {
                  sendConfirmRegisterForm(data.student.id, updatedData.studentLastName, updatedData.studentFirstName);
                }
                closeModal();
                logger.debug('Success:', data);
                // Forcer le rechargement complet des données
                setReloadFetch(true);
              })
              .catch((error) => {
                logger.error('Error:', error);
              });
          }
        })
        .catch(error => {
          logger.error('Error:', error);
        });
    }
  }

const columns = [
  { name: t('studentName'), transform: (row) => row.student.last_name },
  { name: t('studentFistName'), transform: (row) => row.student.first_name },
  { name: t('mainContactMail'), transform: (row) => row.student.guardians[0].email },
  { name: t('phone'), transform: (row) => formatPhoneNumber(row.student.guardians[0].phone) },
  { name: t('lastUpdateDate'), transform: (row) => row.formatted_last_update},
  { name: t('registrationFileStatus'), transform: (row) => (
            <div className="flex justify-center items-center h-full">
              <StatusLabel status={row.status} onChange={(newStatus) => updateStatusAction(row.student.id, newStatus)} showDropdown={false} />
            </div>
          )
  },
  { name: t('files'), transform: (row) =>
  (row.registration_file != null) &&(
      <ul>
      <li className="flex items-center gap-2">
          <FileText size={16} />
           <a href={ `${BASE_URL}${row.registration_file}`} target='_blank'>{row.registration_file?.split('/').pop()}</a>
        </li>
    </ul>
  ) },
  { name: 'Actions', transform: (row) => (
    <DropdownMenu
      buttonContent={<MoreVertical size={20} className="text-gray-400 hover:text-gray-600" />}
      items={[
        ...(row.status === 1 ? [{
          label: (
            <>
              <Send size={16} className="mr-2" /> Envoyer
            </>
          ),
          onClick: () => sendConfirmRegisterForm(row.student.id, row.student.last_name, row.student.first_name),
        }] : []),
        ...(row.status === 1 ? [{
          label: (
            <>
              <Edit size={16} className="mr-2" /> Modifier
            </>
          ),
          onClick: () => window.location.href = `${FE_ADMIN_SUBSCRIPTIONS_EDIT_URL}?studentId=${row.student.id}&id=1`,
        }] : []),
        ...(row.status === 2 ? [{
          label: (
            <>
              <Edit size={16} className="mr-2" /> Modifier
            </>
          ),
          onClick: () => window.location.href = `${FE_ADMIN_SUBSCRIPTIONS_EDIT_URL}?studentId=${row.student.id}&id=1`,
        }] : []),
        ...(row.status === 3 ? [{
          label: (
            <>
              <CheckCircle size={16} className="mr-2" /> Valider
            </>
          ),
          onClick: () => openModalAssociationEleve(row.student),
        }] : []),
        ...(row.status === 5 ? [{
          label: (
            <>
              <CheckCircle size={16} className="mr-2" /> Rattacher
            </>
          ),
          onClick: () => openModalAssociationEleve(row.student),
        }] : []),
        ...(row.status !== 6 ? [{
          label: (
            <>
              <Trash2 size={16} className="mr-2 text-red-700" /> Archiver
            </>
          ),
          onClick: () => archiveFicheInscription(row.student.id, row.student.last_name, row.student.first_name),
        }] : []),
      ]}
      buttonClassName="text-gray-400 hover:text-gray-600"
      menuClassName="absolute right-0 mt-2 w-48 bg-white border border-gray-200 rounded-md shadow-lg z-10 flex flex-col items-center"
    />
  ) },

];

const columnsSubscribed = [
  { name: t('studentName'), transform: (row) => row.student.last_name },
  { name: t('studentFistName'), transform: (row) => row.student.first_name },
  { name: t('lastUpdateDate'), transform: (row) => row.updated_date_formated},
  { name: t('class'), transform: (row) => row.student.first_name},
  { name: t('registrationFileStatus'), transform: (row) =>
          (
            <div className="flex justify-center items-center h-full">
              <StatusLabel status={row.status} onChange={(newStatus) => updateStatusAction(row.student.id, newStatus)} showDropdown={false} />
            </div>
          )
  },
  { name: t('files'), transform: (row) =>
  (row.registration_file != null) &&(
    <ul>
      <li  className="flex items-center gap-2">
          <FileText size={16} />
          <a href={ `${BASE_URL}${row.registration_file}`} target='_blank'>{row.registration_file?.split('/').pop()}</a>
        </li>
    </ul>
  ) },
  { name: 'Actions', transform: (row) => (
    <DropdownMenu
      buttonContent={<MoreVertical size={20} className="text-gray-400 hover:text-gray-600" />}
      items={[
        { label: (
            <>
              <CheckCircle size={16} className="mr-2" /> Rattacher
            </>
          ),
          onClick: () => openModalAssociationEleve(row.student)
        },
        { label: (
            <>
              <Trash2 size={16} className="mr-2 text-red-700" /> Archiver
            </>
          ),
          onClick: () => archiveFicheInscription(row.student.id, row.student.last_name, row.student.first_name),
        }
      ]}
      buttonClassName="text-gray-400 hover:text-gray-600"
      menuClassName="absolute right-0 mt-2 w-48 bg-white border border-gray-200 rounded-md shadow-lg z-10 flex flex-col items-center"
    />
  ) },

];

  const tabs = [
    {
      id: 'pending',
      label: t('pending'),
      count: totalPending
    },
    {
      id: 'subscribed',
      label: t('subscribed'),
      count: totalSubscribed
    },
    {
      id: 'archived',
      label: t('archived'),
      count: totalArchives
    }
  ];

  if (isLoading) {
    return <Loader />;
  } else {
    if (registrationForms.length === 0 && registrationFormsDataArchived.length === 0 && alertPage) {
      return (
        <div className='p-8'>
          <AlertWithModal
            title={t("information")}
            message={t("no_records") + " " + t("create_first_record")}
            buttonText={t("add_button")}
          />
        </div>
      );
    } else {
      return (
        <div className='p-8'>
          <div className="border-b border-gray-200 mb-6">
            <div className="flex items-center gap-8">
              <Tab
                text={(
                  <>
                    {t('pending')}
                    <span className="ml-2 text-sm text-gray-400">({totalPending})</span>
                  </>
                )}
                active={activeTab === 'pending'}
                onClick={() => setActiveTab('pending')}
              />
              <Tab
                text={(
                  <>
                    {t('subscribed')}
                    <span className="ml-2 text-sm text-gray-400">({totalSubscribed})</span>
                  </>
                )}
                active={activeTab === 'subscribed'}
                onClick={() => setActiveTab('subscribed')}
              />
              <Tab
                text={(
                  <>
                    {t('archived')}
                    <span className="ml-2 text-sm text-gray-400">({totalArchives})</span>
                  </>
                )}
                active={activeTab === 'archived'}
                onClick={() => setActiveTab('archived')}
              />
            </div>
          </div>
          <div className="border-b border-gray-200 mb-6 w-full">
           {/*SI STATE == pending || subscribe || archived */}
            {activeTab === 'pending' || activeTab === 'subscribed' || activeTab === 'archived' ? (
            <React.Fragment>
            <div className="flex justify-between items-center mb-4 w-full">
              <div className="relative flex-grow">
                <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400" size={20} />
                <input
                  type="text"
                  placeholder={t('searchStudent')}
                  className="w-full pl-10 pr-4 py-2 border border-gray-200 rounded-md"
                  value={searchTerm}
                  onChange={handleSearchChange}
                />
              </div>
              <button
                onClick={openModal}
                className="flex items-center bg-emerald-600 text-white p-2 rounded-full shadow hover:bg-emerald-900 transition duration-200 ml-4"
              >
                <Plus className="w-5 h-5" />
              </button>
            </div>

            <div className="w-full">
              <DjangoCSRFToken csrfToken={csrfToken} />
              <Table
                key={`${currentPage}-${searchTerm}`}
                data={
                  activeTab === 'pending'
                    ? registrationFormsDataPending
                    : activeTab === 'subscribed'
                    ? registrationFormsDataSubscribed
                    : registrationFormsDataArchived
                }
                columns={
                  activeTab === 'subscribed'
                  ? columnsSubscribed
                  : columns
                }
                itemsPerPage={itemsPerPage}
                currentPage={currentPage}
                totalPages={totalPages}
                onPageChange={handlePageChange}
              />
            </div>
            </React.Fragment>
            ) : null}
          </div>
          <Popup
            visible={popup.visible}
            message={popup.message}
            onConfirm={() => {
              popup.onConfirm();
              setPopup({ ...popup, visible: false });
            }}
            onCancel={() => setPopup({ ...popup, visible: false })}
          />

          {isOpen && (
            <Modal
                isOpen={isOpen}
                setIsOpen={setIsOpen}
                title={"Nouveau dossier d'inscription"}
                ContentComponent={() => (
                    <InscriptionForm  students={students}
                                      registrationDiscounts={registrationDiscounts}
                                      tuitionDiscounts={tuitionDiscounts}
                                      registrationFees={registrationFees.filter(fee => fee.is_active)}
                                      tuitionFees={tuitionFees.filter(fee => fee.is_active)}
                                      groups={groups}
                                      onSubmit={createRF}
                    />
                )}
              />
          )}
          {isOpenAffectationClasse && (
            <Modal
              isOpen={isOpenAffectationClasse}
              setIsOpen={setIsOpenAffectationClasse}
              title="Affectation à une classe"
              ContentComponent={() => (
                <AffectationClasseForm
                  student={student}
                  onSubmit={affectationClassFormSubmitHandler}
                  classes={classes}
                />
              )}
            />
          )}
        </div>
      );
    }
  }
}