import { ICalendarEvent } from '../types/CalendarTypes';
/**
 * Update source type
 * - 'local': Changes made by the user locally (needs sync)
 * - 'remote': Changes from API/SignalR (already synced)
 */
export type UpdateSource = 'local' | 'remote';
/**
 * IEventRepository - Interface for event data access
 *
 * Abstracts the data source for calendar events, allowing easy switching
 * between IndexedDB, REST API, GraphQL, or other data sources.
 *
 * Implementations:
 * - IndexedDBEventRepository: Local storage with offline support
 * - MockEventRepository: (Legacy) Loads from local JSON file
 * - ApiEventRepository: (Future) Loads from backend API
 */
export interface IEventRepository {
    /**
     * Load all calendar events from the data source
     * @returns Promise resolving to array of ICalendarEvent objects
     * @throws Error if loading fails
     */
    loadEvents(): Promise<ICalendarEvent[]>;
    /**
     * Create a new event
     * @param event - Event to create (without ID, will be generated)
     * @param source - Source of the update ('local' or 'remote')
     * @returns Promise resolving to the created event with generated ID
     * @throws Error if creation fails
     */
    createEvent(event: Omit<ICalendarEvent, 'id'>, source?: UpdateSource): Promise<ICalendarEvent>;
    /**
     * Update an existing event
     * @param id - ID of the event to update
     * @param updates - Partial event data to update
     * @param source - Source of the update ('local' or 'remote')
     * @returns Promise resolving to the updated event
     * @throws Error if update fails or event not found
     */
    updateEvent(id: string, updates: Partial<ICalendarEvent>, source?: UpdateSource): Promise<ICalendarEvent>;
    /**
     * Delete an event
     * @param id - ID of the event to delete
     * @param source - Source of the update ('local' or 'remote')
     * @returns Promise resolving when deletion is complete
     * @throws Error if deletion fails or event not found
     */
    deleteEvent(id: string, source?: UpdateSource): Promise<void>;
}