import { MysqlConnectionOptions } from 'typeorm/driver/mysql/MysqlConnectionOptions';
import { SqliteConnectionOptions } from 'typeorm/driver/sqlite/SqliteConnectionOptions';

/**
 * Config of database connection, which is an alias to MySql connection or Sqlite connection.
 * Sqlite connection is only supported in unit test environment.
 *
 * Please do not use the following parameter in the configuration:
 *  - synchronize (Unsafe)
 *  - dropSchema (Unsafe)
 *  - entities (already defined in entity package)
 */
export type ModelConfig = MysqlConnectionOptions | SqliteConnectionOptions;

export type ModelConfigProvider = (() => Promise<ModelConfig>) | ModelConfig;

/**
 * Checks if the current environment is a unit test environment.
 * Sqlite entity type will be different in these environments.
 *
 * @return {boolean} Returns `true` if the current environment is a unit test environment, otherwise `false`.
 */
export function isUnitTestEnv(): boolean {
  return typeof window === 'undefined' && process.env.NODE_ENV === 'test';
}

/**
 * Returns the type argument for a long text based on the environment.
 *
 * @return {'text' | 'longtext'} - The type argument for a long text.
 */
export function getLongTextEntityType(): 'text' | 'longtext' {
  return isUnitTestEnv() ? 'text' : 'longtext';
}