'use strict';

const _ = require('lodash');
const assert = require('assert');

const AppContext = require('./lib/contexts/AppContext');

exports.createAppContext = function (options) {
  return new AppContext(options);
};

exports.middleware = function (options) {
  assert(_.isObject(options), 'options should be an object');
  assert(options.appContext instanceof AppContext, '"appContext" should be an application context object');
  assert(options.logNetwork === undefined || _.isBoolean(options.logNetwork), '"logNetwork" (if provided) should be a boolean');

  return function createLoggingContext(req, res, next) {
    req.loggingContext = options.appContext.createLogContext({ req });
    res.setHeader('x-request-id', req.loggingContext.id);

    if (options.logNetwork) {
      req.loggingContext.enableNetworkLog(res);
    }

    next();
  };
};