import { CONSOLE_LEVELS, originalConsoleMethods } from '../logger.js';
import { fill } from '../object.js';
import { GLOBAL_OBJ } from '../worldwide.js';
import { addHandler, maybeInstrument, triggerHandlers } from './_handlers.js';

/**
 * Add an instrumentation handler for when a console.xxx method is called.
 *
 * Use at your own risk, this might break without changelog notice, only used internally.
 * @hidden
 */
function addConsoleInstrumentationHandler(handler) {
  const type = 'console';
  addHandler(type, handler);
  maybeInstrument(type, instrumentConsole);
}

function instrumentConsole() {
  if (!('console' in GLOBAL_OBJ)) {
    return;
  }

  CONSOLE_LEVELS.forEach(function (level) {
    if (!(level in GLOBAL_OBJ.console)) {
      return;
    }

    fill(GLOBAL_OBJ.console, level, function (originalConsoleMethod) {
      originalConsoleMethods[level] = originalConsoleMethod;

      return function (...args) {
        const handlerData = { args, level };
        triggerHandlers('console', handlerData);

        const log = originalConsoleMethods[level];
        log && log.apply(GLOBAL_OBJ.console, args);
      };
    });
  });
}

export { addConsoleInstrumentationHandler };
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