import { ICustomer } from '../types/CustomerTypes';
import { EntityType } from '../types/CalendarTypes';
import { Configuration } from '../configurations/CalendarConfig';
import { IApiRepository } from './IApiRepository';

/**
 * ApiCustomerRepository
 * Handles communication with backend API for customers
 *
 * Implements IApiRepository<ICustomer> for generic sync infrastructure.
 * Used by SyncManager to send queued customer operations to the server.
 */
export class ApiCustomerRepository implements IApiRepository<ICustomer> {
  readonly entityType: EntityType = 'Customer';
  private apiEndpoint: string;

  constructor(config: Configuration) {
    this.apiEndpoint = config.apiEndpoint;
  }

  /**
   * Send create operation to API
   */
  async sendCreate(customer: ICustomer): Promise<ICustomer> {
    // TODO: Implement API call
    // const response = await fetch(`${this.apiEndpoint}/customers`, {
    //   method: 'POST',
    //   headers: { 'Content-Type': 'application/json' },
    //   body: JSON.stringify(customer)
    // });
    //
    // if (!response.ok) {
    //   throw new Error(`API create failed: ${response.statusText}`);
    // }
    //
    // return await response.json();

    throw new Error('ApiCustomerRepository.sendCreate not implemented yet');
  }

  /**
   * Send update operation to API
   */
  async sendUpdate(id: string, updates: Partial<ICustomer>): Promise<ICustomer> {
    // TODO: Implement API call
    // const response = await fetch(`${this.apiEndpoint}/customers/${id}`, {
    //   method: 'PATCH',
    //   headers: { 'Content-Type': 'application/json' },
    //   body: JSON.stringify(updates)
    // });
    //
    // if (!response.ok) {
    //   throw new Error(`API update failed: ${response.statusText}`);
    // }
    //
    // return await response.json();

    throw new Error('ApiCustomerRepository.sendUpdate not implemented yet');
  }

  /**
   * Send delete operation to API
   */
  async sendDelete(id: string): Promise<void> {
    // TODO: Implement API call
    // const response = await fetch(`${this.apiEndpoint}/customers/${id}`, {
    //   method: 'DELETE'
    // });
    //
    // if (!response.ok) {
    //   throw new Error(`API delete failed: ${response.statusText}`);
    // }

    throw new Error('ApiCustomerRepository.sendDelete not implemented yet');
  }

  /**
   * Fetch all customers from API
   */
  async fetchAll(): Promise<ICustomer[]> {
    // TODO: Implement API call
    // const response = await fetch(`${this.apiEndpoint}/customers`);
    //
    // if (!response.ok) {
    //   throw new Error(`API fetch failed: ${response.statusText}`);
    // }
    //
    // return await response.json();

    throw new Error('ApiCustomerRepository.fetchAll not implemented yet');
  }
}