// Copyright Abridged, Inc. 2021,2024. All Rights Reserved.
// Node module: @collabland/common
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT

import {Debugger} from 'debug';
import {P, pino} from 'pino';
import {
  LogLevel,
  getLogLevelForNamespace,
  isLogEnabled,
  redactData,
} from './debug.js';
import {getEnvVar} from './env.js';

function getLoggingLevel() {
  const level = getEnvVar('DEBUG_PINO');
  return Object.values(LogLevel).find(l => l === level);
}

/**
 * Get a Pino logger if Pino is enabled
 * @returns
 */
export function getPinoLogger() {
  const loggingLevel = getLoggingLevel();

  const logger =
    loggingLevel != null
      ? pino({level: loggingLevel}, process.stderr)
      : undefined;
  return logger;
}

export function getPinoDebugger(
  logger: P.Logger,
  debugFactory: (ns: string) => Debugger,
  namespace: string,
) {
  const level = getLogLevelForNamespace(namespace);
  const child = logger.child({ns: namespace});
  const debugFn = ((...args: unknown[]) => {
    if (!isLogEnabled(namespace)) return;
    args = redactData(args);
    let msg = '';
    if (typeof args[0] === 'string') {
      msg = args[0];
      args = args.slice(1);
    }
    child[level]({}, msg, ...args);
  }) as Debugger;
  Object.defineProperty(debugFn, 'enabled', {
    get: function () {
      return isLogEnabled(namespace);
    },
  });
  debugFn.namespace = namespace;
  debugFn.extend = (subNamespace: string, delimiter?: string) =>
    debugFactory(namespace + (delimiter ?? ':') + subNamespace);
  return debugFn;
}