import Ember from 'ember';

const { Mixin, run: { once } } = Ember;

export default Mixin.create({
  actions: {
    willTransition(transition) {
      if (!this.get('controller.safeNavigate')) {
        if (confirm('Any unsaved changes will be discarded.')) {
          let model = this.get('controller.model');
          let hasMany = this.get('controller.hasMany');

          hasMany.forEach((relationship) => {
            model.get(relationship).forEach((r) => {
              once(this, () => {
                if (r.get('isNew')) {
                  r.deleteRecord();
                } else {
                  r.rollbackAttributes();
                }
              }, this);
            });
          });

          if (model.get('isNew')) {
            model.deleteRecord();
          }
        } else {
          transition.abort();
          return false
        }
      }
      return true;
    },
  },
});