import { useState, useEffect } from "react";
import { Event } from "@prisma/client";

export function useCalendarEvents(calendarId: string, start: Date, end: Date) {
  const [events, setEvents] = useState<Event[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<Error | null>(null);

  // Charger les événements
  const fetchEvents = async () => {
    if (!calendarId) return;

    try {
      setLoading(true);
      setError(null);

      const response = await fetch(
        `/api/calendars/${calendarId}/events?` +
          `start=${start.toISOString()}&end=${end.toISOString()}`
      );

      if (!response.ok) {
        throw new Error(`Erreur ${response.status}: ${await response.text()}`);
      }

      const data = await response.json();
      setEvents(data);
    } catch (err) {
      console.error("Erreur lors du chargement des événements:", err);
      setError(err as Error);
    } finally {
      setLoading(false);
    }
  };

  // Créer un événement
  const createEvent = async (eventData: any) => {
    const response = await fetch(`/api/calendars/${calendarId}/events`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify(eventData),
    });

    if (!response.ok) {
      const errorText = await response.text();
      throw new Error(errorText);
    }

    return await response.json();
  };

  // Mettre à jour un événement
  const updateEvent = async (eventData: any) => {
    const response = await fetch(
      `/api/calendars/${calendarId}/events/${eventData.id}`,
      {
        method: "PUT",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(eventData),
      }
    );

    if (!response.ok) {
      const errorText = await response.text();
      throw new Error(errorText);
    }

    return await response.json();
  };

  // Supprimer un événement
  const deleteEvent = async (eventId: string) => {
    const response = await fetch(
      `/api/calendars/${calendarId}/events/${eventId}`,
      {
        method: "DELETE",
      }
    );

    if (!response.ok) {
      const errorText = await response.text();
      throw new Error(errorText);
    }

    return true;
  };

  // Charger les événements quand le calendrier ou les dates changent
  useEffect(() => {
    fetchEvents();
  }, [calendarId, start.toISOString(), end.toISOString()]);

  return {
    events,
    loading,
    error,
    refresh: fetchEvents,
    createEvent,
    updateEvent,
    deleteEvent,
  };
}