import { sdkLogger as logger } from "../services/reporting-service/logger.js";
import { CoreConfiguration } from "../services/data-sync-service/configuration-manager.js";
import { SQLiteCoordinator } from "../services/sqlite-service/index.js";
import { ensureCompanyInfo } from "../services/mm-api-service/company-info.js";
import knex from "knex";
import config from "../knexfile.js";

/**
 * Utility class to handle application initialization tasks
 */
export class ApplicationInitializer {
  /**
   * Performs all necessary application initialization tasks
   * This should be called before starting any services or jobs
   */
  public static async initialize(): Promise<void> {
    try {
      logger.info(
        "\n================================INITIALIZING APPLICATION================================\n"
      );

      // Load and validate core configuration
      const coreConfig = CoreConfiguration.inst();
      logger.info("Core Configuration loaded:", coreConfig.toSafeLogObject());

      // Migrations first: runtime-state reads (startup lock check) use sdk_runtime_state,
      // which must exist via migrate.latest before any lazy CREATE TABLE IF NOT EXISTS runs.
      logger.info("Running database migrations...");
      await ApplicationInitializer.runMigrations();
      logger.info("Database migrations completed successfully");

      logger.info("Performing database startup checks...");
      await SQLiteCoordinator.performStartupCheck();
      logger.info("Database startup checks completed successfully");

      // Loads company info from MM into memory + SQLite runtime state (timezone, locationRef, companyId).
      // Retries until success; failure aborts init. Confirms the MM API token works for /accounts/current.
      await ensureCompanyInfo();

      logger.info(
        "\n================================APPLICATION INITIALIZATION COMPLETED================================\n"
      );
    } catch (error) {
      logger.error("Critical initialization failure. Exiting.", error);
      process.exitCode = 1;
    }
  }

  /**
   * Runs database migrations to ensure all required tables exist
   */
  private static async runMigrations(): Promise<void> {
    const db = knex(config.local);
    try {
      await db.migrate.latest();
    } catch (error) {
      logger.error("Error running migrations:", error);
      throw error;
    } finally {
      await db.destroy();
    }
  }
}