/* jshint esnext: true */

import Ember from 'ember';

// When mixed into an Ember.Component class, actions can be explicitly or implicitly delegated to the parent.
// In general this makes the most sense for an app-level component, where actions are not mututated as they bubble
// up to higher levels.
export default Ember.Mixin.create({

  // When true, all actions will be implicitly passed on to the parent
  delegateAllActions: false,

  // Explicitly delegated actions
  // example: delegatedActions: ['select', 'show', 'edit', 'destroy']
  // May also be declared a as a comma-separated attribute in your template
  // Example: {{my-component delegatedActions="select,show,edit"}}
  delegatedActions: [],

  _delegatedActions: Ember.computed('delegatedActions', function() {
    'use strict';
    var delegatedActions = this.get('delegatedActions');
    if (typeof(delegatedActions) === 'string') {
      return delegatedActions.split(',').map(s => s.trim());
    } else {
      return delegatedActions;
    }
  }),

  // Override send to call delegatedActions as appropriate
  // If an action handler is defined, event will not be delegated
  send(actionName) {
    'use strict';
    if (!this._actions || !this._actions[actionName]) {
      if (this.get('delegateAllActions')) {
        // Delegate all actions
        Ember.Logger.debug(`Action delegated implicitly by ${this.toString()}:`, actionName);
        return this.delegateAction.apply(this, arguments);
      } else {
        Ember.Logger.warn(`Actions not delegated by ${this.toString()}:`, actionName);
      }

      var delegatedActions = this.get('_delegatedActions');
      if (delegatedActions.contains(actionName) && this.sendAction) {
        Ember.Logger.info(`Action delegated by ${this.toString()}:`, actionName);
        return this.delegateAction.apply(this, arguments);
      } else {
        Ember.Logger.warn(`Action not delegated by ${this.toString()}:`, actionName);
      }
    }
    return this._super.apply(this, arguments);
  },

  // Trigger action explicitly
  delegateAction(actionName, ...contexts) {
    'use strict';
    Ember.Logger.debug("delegateAction", actionName, contexts);
    this.triggerAction({
      action: actionName,
      actionContext: contexts
    });
    return;
  }

});