import ModalFunctionality from 'discourse/mixins/modal-functionality';
import ActionSummary from 'discourse/models/action-summary';
import { MAX_MESSAGE_LENGTH } from 'discourse/models/post-action-type';
import computed from 'ember-addons/ember-computed-decorators';
import optionalService from 'discourse/lib/optional-service';

export default Ember.Controller.extend(ModalFunctionality, {
  adminTools: optionalService(),
  userDetails: null,
  selected: null,
  flagTopic: null,
  message: null,
  isWarning: false,
  topicActionByName: null,
  spammerDetails: null,

  onShow() {
    this.setProperties({
      selected: null,
      spammerDetails: null
    });

    let adminTools = this.get('adminTools');
    if (adminTools) {
      adminTools.checkSpammer(this.get('model.user_id')).then(result => {
        this.set('spammerDetails', result);
      });
    }
  },

  @computed('spammerDetails.canDelete', 'selected.name_key')
  showDeleteSpammer(canDeleteSpammer, nameKey) {
    return canDeleteSpammer && nameKey === 'spam';
  },

  @computed('flagTopic')
  title(flagTopic) {
    return flagTopic ? 'flagging_topic.title' : 'flagging.title';
  },

  flagsAvailable: function() {
    if (!this.get('flagTopic')) {
      // flagging post
      let flagsAvailable = this.get('model.flagsAvailable');

      // "message user" option should be at the top
      const notifyUserIndex = flagsAvailable.indexOf(flagsAvailable.filterBy('name_key', 'notify_user')[0]);
      if (notifyUserIndex !== -1) {
        const notifyUser = flagsAvailable[notifyUserIndex];
        flagsAvailable.splice(notifyUserIndex, 1);
        flagsAvailable.splice(0, 0, notifyUser);
      }
      return flagsAvailable;
    } else {
      // flagging topic
      let lookup = Em.Object.create();
      let model = this.get('model');
      model.get('actions_summary').forEach(a => {
        a.flagTopic = model;
        a.actionType = this.site.topicFlagTypeById(a.id);
        lookup.set(a.actionType.get('name_key'), ActionSummary.create(a));
      });
      this.set('topicActionByName', lookup);

      return this.site.get('topic_flag_types').filter(item => {
        return _.any(this.get("model.actions_summary"), a => {
          return (a.id === item.get('id') && a.can_act);
        });
      });
    }
  }.property('post', 'flagTopic', 'model.actions_summary.@each.can_act'),

  staffFlagsAvailable: function() {
    return (this.get('model.flagsAvailable') && this.get('model.flagsAvailable').length > 1);
  }.property('post', 'flagTopic', 'model.actions_summary.@each.can_act'),

  submitEnabled: function() {
    const selected = this.get('selected');
    if (!selected) return false;

    if (selected.get('is_custom_flag')) {
      const len = this.get('message.length') || 0;
      return len >= Discourse.SiteSettings.min_private_message_post_length &&
             len <= MAX_MESSAGE_LENGTH;
    }
    return true;
  }.property('selected.is_custom_flag', 'message.length'),

  submitDisabled: Em.computed.not('submitEnabled'),

  // Staff accounts can "take action"
  @computed('flagTopic', 'selected.is_custom_flag')
  canTakeAction(flagTopic, isCustomFlag) {
    return !flagTopic && !isCustomFlag && this.currentUser.get('staff');
  },

  @computed('selected.is_custom_flag')
  submitIcon(isCustomFlag) {
    return isCustomFlag ? "envelope" : "flag";
  },

  @computed('selected.is_custom_flag', 'flagTopic')
  submitLabel(isCustomFlag, flagTopic) {
    if (isCustomFlag) {
      return flagTopic ? "flagging_topic.notify_action" : "flagging.notify_action";
    }
    return flagTopic ? "flagging_topic.action" : "flagging.action";
  },

  actions: {
    deleteSpammer() {
      let details = this.get('spammerDetails');
      if (details) {
        details.deleteUser().then(() => window.location.reload());
      }
    },

    takeAction() {
      this.send('createFlag', {takeAction: true});
      this.set('model.hidden', true);
    },

    createFlag(opts) {
      let postAction; // an instance of ActionSummary

      if (!this.get('flagTopic')) {
        postAction = this.get('model.actions_summary').findBy('id', this.get('selected.id'));
      } else {
        postAction = this.get('topicActionByName.' + this.get('selected.name_key'));
      }

      let params = this.get('selected.is_custom_flag') ? {message: this.get('message') } : {};
      if (opts) { params = $.extend(params, opts); }

      this.send('hideModal');

      postAction.act(this.get('model'), params).then(() => {
        this.send('closeModal');
        if (params.message) {
          this.set('message', '');
        }
        this.appEvents.trigger('post-stream:refresh', { id: this.get('model.id') });
      }).catch(errors => {
        this.send('closeModal');
        if (errors && errors.responseText) {
          bootbox.alert($.parseJSON(errors.responseText).errors);
        } else {
          bootbox.alert(I18n.t('generic_error'));
        }
      });
    },

    createFlagAsWarning() {
      this.send('createFlag', {isWarning: true});
      this.set('model.hidden', true);
    },

    changePostActionType(action) {
      this.set('selected', action);
    },
  },

  @computed('flagTopic', 'selected.name_key')
  canSendWarning(flagTopic, nameKey) {
    return !flagTopic && this.currentUser.get('staff') && nameKey === 'notify_user';
  }

});