angular.module('app', ['mgcrea.ngStrap']).config(['$provide', $provide => {

  $provide.decorator('$modal', $delegate => config => {

    const createConfigMethodDecorator = (orignalMethod, lifeCycleEventName) => $m => {
      if (config.controllerAs) {
        const modalPromise = $m.$promise
        if (modalPromise) {
          modalPromise.then(val => {
            if (val && val.locals) {
              const modalScope = val.locals.$scope
              if (modalScope) {
                const ctrl = modalScope[config.controllerAs]
                if (ctrl) {
                  if (angular.isFunction(ctrl[lifeCycleEventName])) {
                    ctrl[lifeCycleEventName]()
                  }
                }
              }
            }
          })
        }
      }

      if (angular.isFunction(orignalMethod)) {
        orignalMethod($m)
      }
    }

    config.onBeforeShow = createConfigMethodDecorator(config.onBeforeShow, '$onInit')
    config.onBeforeHide = createConfigMethodDecorator(config.onBeforeHide, '$onDestroy')

    return $delegate(config)
  })
}])