import React, { useState, useEffect, useMemo } from 'react';
import { Calendar } from 'lucide-react';
import Table from '@/components/Table';
import Popup from '@/components/Popup';
import logger from '@/utils/logger';
import { useEstablishment } from '@/context/EstablishmentContext';
import CheckBox from '@/components/Form/CheckBox';

const paymentPlansOptions = [
  { id: 1, name: '1 fois', frequency: 1 },
  { id: 2, name: '3 fois', frequency: 3 },
  { id: 3, name: '10 fois', frequency: 10 },
  { id: 4, name: '12 fois', frequency: 12 },
];

/**
 * Affiche les plans de paiement communs aux deux types de frais.
 * Quand `allPaymentPlans` est fourni (mode unifié), un plan coché est créé pour
 * les deux types (inscription 0 ET scolarité 1) en même temps.
 *
 * Props (mode unifié) :
 *   allPaymentPlans  : [{plan_type, type, ...}, ...] - liste combinée des deux types
 *   handleCreate     : (data) => Promise  - avec type et establishment déjà présent dans data
 *   handleDelete     : (id) => Promise
 *
 * Props (mode legacy) :
 *   paymentPlans, handleCreate, handleDelete, type
 */
const PaymentPlanSelector = ({
  paymentPlans,
  allPaymentPlans,
  handleCreate,
  handleDelete,
  type,
}) => {
  const [popupVisible, setPopupVisible] = useState(false);
  const [popupMessage, setPopupMessage] = useState('');
  const { selectedEstablishmentId } = useEstablishment();
  const [checkedPlans, setCheckedPlans] = useState([]);

  const plans = useMemo(
    () =>
      Array.isArray(allPaymentPlans)
        ? allPaymentPlans
        : Array.isArray(paymentPlans)
          ? paymentPlans
          : [],
    [allPaymentPlans, paymentPlans]
  );
  const unified = !!allPaymentPlans;

  // Un plan est coché si au moins un enregistrement existe pour cette option
  const isChecked = (planOption) => checkedPlans.includes(planOption.id);

  const handlePlanToggle = (planOption) => {
    if (isChecked(planOption)) {
      // Supprimer tous les enregistrements correspondant à cette option (les deux types en mode unifié)
      const toDelete = plans.filter(
        (p) =>
          (typeof p.plan_type === 'object' ? p.plan_type.id : p.plan_type) ===
          planOption.id
      );
      setCheckedPlans((prev) => prev.filter((id) => id !== planOption.id));
      toDelete.forEach((p) =>
        handleDelete(p.id, null).catch((e) => logger.error(e))
      );
    } else {
      setCheckedPlans((prev) => [...prev, planOption.id]);
      if (unified) {
        // Créer pour inscription (0) et scolarité (1)
        [0, 1].forEach((t) =>
          handleCreate({
            plan_type: planOption.id,
            type: t,
            establishment: selectedEstablishmentId,
          }).catch((e) => logger.error(e))
        );
      } else {
        handleCreate({
          plan_type: planOption.id,
          type,
          establishment: selectedEstablishmentId,
        }).catch((e) => logger.error(e));
      }
    }
  };

  useEffect(() => {
    if (plans.length > 0) {
      const ids = plans.map((plan) =>
        typeof plan.plan_type === 'object' ? plan.plan_type.id : plan.plan_type
      );
      setCheckedPlans([...new Set(ids)]);
    } else {
      setCheckedPlans([]);
    }
  }, [plans]);

  return (
    <div className="space-y-4">
      <div className="flex items-center mb-4">
        <Calendar className="w-6 h-6 text-emerald-500 mr-2" />
        <h2 className="text-xl font-semibold">Paiement en plusieurs fois</h2>
      </div>
      <div className="grid grid-cols-2 gap-4">
        <Table
          data={paymentPlansOptions}
          columns={[
            { name: 'OPTION', label: 'Option' },
            { name: 'ACTIF', label: 'Actif' },
          ]}
          renderCell={(row, column) => {
            switch (column) {
              case 'OPTION':
                return (
                  <span className="text-sm font-medium text-gray-900">
                    {row.name}
                  </span>
                );
              case 'ACTIF':
                return (
                  <CheckBox
                    item={{ id: row.id }}
                    formData={{ checked: isChecked(row) }}
                    handleChange={() => handlePlanToggle(row)}
                    fieldName="checked"
                    itemLabelFunc={() => ''}
                    horizontal={true}
                  />
                );
              default:
                return null;
            }
          }}
        />
      </div>
      <Popup
        isOpen={popupVisible}
        message={popupMessage}
        onConfirm={() => setPopupVisible(false)}
        onCancel={() => setPopupVisible(false)}
        uniqueConfirmButton={true}
      />
    </div>
  );
};

export default PaymentPlanSelector;