// Optional environment variables for data source testing
// These are only required when actually running tests for specific database types

export const env = {
  // PostgreSQL
  TEST_POSTGRES_HOST: process.env.TEST_POSTGRES_HOST,
  TEST_POSTGRES_DATABASE: process.env.TEST_POSTGRES_DATABASE,
  TEST_POSTGRES_USERNAME: process.env.TEST_POSTGRES_USERNAME,
  TEST_POSTGRES_PASSWORD: process.env.TEST_POSTGRES_PASSWORD,

  // MySQL
  TEST_MYSQL_HOST: process.env.TEST_MYSQL_HOST,
  TEST_MYSQL_DATABASE: process.env.TEST_MYSQL_DATABASE,
  TEST_MYSQL_USERNAME: process.env.TEST_MYSQL_USERNAME,
  TEST_MYSQL_PASSWORD: process.env.TEST_MYSQL_PASSWORD,

  // Snowflake
  TEST_SNOWFLAKE_ACCOUNT_ID: process.env.TEST_SNOWFLAKE_ACCOUNT_ID,
  TEST_SNOWFLAKE_WAREHOUSE_ID: process.env.TEST_SNOWFLAKE_WAREHOUSE_ID,
  TEST_SNOWFLAKE_USERNAME: process.env.TEST_SNOWFLAKE_USERNAME,
  TEST_SNOWFLAKE_PASSWORD: process.env.TEST_SNOWFLAKE_PASSWORD,
  TEST_SNOWFLAKE_DATABASE: process.env.TEST_SNOWFLAKE_DATABASE,

  // BigQuery
  TEST_BIGQUERY_PROJECT_ID: process.env.TEST_BIGQUERY_PROJECT_ID,
  TEST_BIGQUERY_SERVICE_ACCOUNT_KEY: process.env.TEST_BIGQUERY_SERVICE_ACCOUNT_KEY,

  // SQL Server
  TEST_SQLSERVER_SERVER: process.env.TEST_SQLSERVER_SERVER,
  TEST_SQLSERVER_DATABASE: process.env.TEST_SQLSERVER_DATABASE,
  TEST_SQLSERVER_USERNAME: process.env.TEST_SQLSERVER_USERNAME,
  TEST_SQLSERVER_PASSWORD: process.env.TEST_SQLSERVER_PASSWORD,

  // Redshift
  TEST_REDSHIFT_HOST: process.env.TEST_REDSHIFT_HOST,
  TEST_REDSHIFT_DATABASE: process.env.TEST_REDSHIFT_DATABASE,
  TEST_REDSHIFT_USERNAME: process.env.TEST_REDSHIFT_USERNAME,
  TEST_REDSHIFT_PASSWORD: process.env.TEST_REDSHIFT_PASSWORD,

  // Databricks
  TEST_DATABRICKS_SERVER_HOSTNAME: process.env.TEST_DATABRICKS_SERVER_HOSTNAME,
  TEST_DATABRICKS_HTTP_PATH: process.env.TEST_DATABRICKS_HTTP_PATH,
  TEST_DATABRICKS_ACCESS_TOKEN: process.env.TEST_DATABRICKS_ACCESS_TOKEN,

  NODE_ENV: process.env.NODE_ENV || 'development',
} as const;

// Helper function to validate specific database connection requirements
export function validateDatabaseEnv(
  dbType: 'postgres' | 'mysql' | 'snowflake' | 'bigquery' | 'sqlserver' | 'redshift' | 'databricks'
) {
  switch (dbType) {
    case 'postgres':
      if (
        !env.TEST_POSTGRES_HOST ||
        !env.TEST_POSTGRES_DATABASE ||
        !env.TEST_POSTGRES_USERNAME ||
        !env.TEST_POSTGRES_PASSWORD
      ) {
        throw new Error('PostgreSQL test environment variables are not fully configured');
      }
      break;
    case 'mysql':
      if (
        !env.TEST_MYSQL_HOST ||
        !env.TEST_MYSQL_DATABASE ||
        !env.TEST_MYSQL_USERNAME ||
        !env.TEST_MYSQL_PASSWORD
      ) {
        throw new Error('MySQL test environment variables are not fully configured');
      }
      break;
    case 'snowflake':
      if (
        !env.TEST_SNOWFLAKE_ACCOUNT_ID ||
        !env.TEST_SNOWFLAKE_USERNAME ||
        !env.TEST_SNOWFLAKE_PASSWORD
      ) {
        throw new Error('Snowflake test environment variables are not fully configured');
      }
      break;
    case 'bigquery':
      if (!env.TEST_BIGQUERY_PROJECT_ID || !env.TEST_BIGQUERY_SERVICE_ACCOUNT_KEY) {
        throw new Error('BigQuery test environment variables are not fully configured');
      }
      break;
    case 'sqlserver':
      if (
        !env.TEST_SQLSERVER_SERVER ||
        !env.TEST_SQLSERVER_DATABASE ||
        !env.TEST_SQLSERVER_USERNAME ||
        !env.TEST_SQLSERVER_PASSWORD
      ) {
        throw new Error('SQL Server test environment variables are not fully configured');
      }
      break;
    case 'redshift':
      if (
        !env.TEST_REDSHIFT_HOST ||
        !env.TEST_REDSHIFT_DATABASE ||
        !env.TEST_REDSHIFT_USERNAME ||
        !env.TEST_REDSHIFT_PASSWORD
      ) {
        throw new Error('Redshift test environment variables are not fully configured');
      }
      break;
    case 'databricks':
      if (
        !env.TEST_DATABRICKS_SERVER_HOSTNAME ||
        !env.TEST_DATABRICKS_HTTP_PATH ||
        !env.TEST_DATABRICKS_ACCESS_TOKEN
      ) {
        throw new Error('Databricks test environment variables are not fully configured');
      }
      break;
  }
}