import {
  inject,
  InjectionToken,
  Injector,
  ModuleWithProviders,
  NgModule,
  signal,
  Signal
} from '@angular/core';
import { BackendIntegrationPlugin } from './backend-integration-plugin';

export const CORE_FORMS_BACKEND_INTEGRATION_ACTION_TYPE = 'CORE_FORMS_BACKEND_INTEGRATION';

export interface CoreFormsBackendIntegrationPluginOptions {
  formId: string;
  tenant: string;
  site: string;
  instance: string;
  talyTurnstileFormfieldId: string;
  talyPrefix: string;
  /**
   * When true, generates a hash of visible form field IDs.
   * @default false
   */
  generateVisibilityHash?: boolean;
  /**
   * If true, appends form data to the external next page URL after submission.
   * @default false
   */
  appendFormDataToNextPageUrl?: boolean;
}

export const CORE_FORMS_BACKEND_INTEGRATION_PLUGIN_OPTIONS = new InjectionToken<
  Signal<CoreFormsBackendIntegrationPluginOptions>
>('CORE_FORMS_BACKEND_INTEGRATION_PLUGIN_OPTIONS');

@NgModule({
  providers: [BackendIntegrationPlugin]
})
export class BackendIntegrationPluginModule {
  constructor() {
    const backendIntegrationPlugin = inject(BackendIntegrationPlugin);

    backendIntegrationPlugin.registerActions();
  }

  static forRoot(
    optionsFactory?: (
      injector: Injector
    ) => Signal<CoreFormsBackendIntegrationPluginOptions | undefined>
  ): ModuleWithProviders<BackendIntegrationPluginModule> {
    const defaultFactory = () =>
      signal<CoreFormsBackendIntegrationPluginOptions | undefined>(undefined);
    return {
      ngModule: BackendIntegrationPluginModule,
      providers: [
        {
          provide: CORE_FORMS_BACKEND_INTEGRATION_PLUGIN_OPTIONS,
          useFactory: optionsFactory || defaultFactory,
          deps: [Injector]
        }
      ]
    };
  }
}