import { Effect, genLogger } from '../../../effect.js';
import { SDKCoreError, StudioCMS_SDK_Error } from '../errors.js';
import { SDKCore_AUTH } from './auth.js';
import { SDKCore_CONFIG, type StudioCMSSiteConfig } from './config.js';

/**
 * Effectful service for initializing core StudioCMS modules.
 *
 * @remarks
 * This service provides initialization routines for the StudioCMS system,
 * including setting up the site configuration and ensuring the existence of the ghost user.
 *
 * @example
 * ```typescript
 * const init = yield* SDKCore_INIT;
 * yield* init.siteConfig({ ... });
 * yield* init.ghostUser();
 * ```
 *
 * @service
 * - Depends on AstroDB and SDKCore_AUTH services.
 *
 * @throws {StudioCMS_SDK_Error}
 * Throws if database errors occur during initialization.
 */
export class SDKCore_INIT extends Effect.Service<SDKCore_INIT>()(
	'studiocms/sdk/SDKCore/modules/init',
	{
		dependencies: [SDKCore_AUTH.Default, SDKCore_CONFIG.Default],
		effect: genLogger('studiocms/sdk/SDKCore/modules/init/effect')(function* () {
			const [{ siteConfig: sdkSiteConfig }, AUTH] = yield* Effect.all([
				SDKCore_CONFIG,
				SDKCore_AUTH,
			]);

			const INIT = {
				/**
				 * Initializes the StudioCMS SiteConfig table with the provided configuration.
				 *
				 * @param config - The configuration to insert into the SiteConfig table.
				 * @returns A promise that resolves to the inserted site configuration.
				 * @throws {StudioCMS_SDK_Error} If an error occurs while creating the site configuration.
				 */
				siteConfig: (config: Omit<StudioCMSSiteConfig, '_config_version'>) =>
					sdkSiteConfig.init(config).pipe(
						Effect.catchTags({
							LibSQLClientError: (cause) =>
								Effect.fail(
									new SDKCoreError({
										type: 'LibSQLDatabaseError',
										cause: new StudioCMS_SDK_Error(`INIT.siteConfig Error: ${cause}`),
									})
								),
						})
					),
				/**
				 * Initializes the StudioCMS Ghost User.
				 *
				 * The ghost user is a default user that is used to perform actions on behalf of the system as well as to replace deleted users.
				 *
				 * @returns A promise that resolves to the ghost user record.
				 * @throws {StudioCMS_SDK_Error} If an error occurs while creating the ghost user.
				 */
				ghostUser: () =>
					Effect.gen(function* () {
						const ghostUserRecord = yield* AUTH.user.ghost.get();
						if (!ghostUserRecord) {
							return yield* AUTH.user.ghost.create();
						}
						return ghostUserRecord;
					}),
			};

			return INIT;
		}),
	}
) {}