// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
(function() {
  Polymer({
    is: 'rv-reviewer',

    properties: {
      canModifyConfig: Boolean,
      pluginRestAPi: Object,
      reviewer: String,
      _reviewerSearchId: String,
      _queryReviewers: {
        type: Function,
        value() {
          return this._getAccountSuggestions.bind(this);
        },
      },
      _originalReviewer: String,
      _deleted: Boolean,
      _editing: {
        type: Boolean,
        computed: '_computeEditing(reviewer, _originalReviewer)',
      },
    },

    attached() {
      this._originalReviewer = this.reviewer;
    },

    _computeReviewerDisabled(reviewer, _originalReviewer) {
      return !this._computeEditing(reviewer, _originalReviewer);
    },

    _computeEditing(reviewer, _originalReviewer) {
      if (_originalReviewer === '') {
        return true;
      }
      return reviewer === '';
    },

    _computeDeleteCancel(reviewer, _originalReviewer) {
      return this._computeEditing(reviewer, _originalReviewer) ?
      'Cancel' : 'Delete';
    },

    _computeHideAddButton(reviewer, _originalReviewer) {
      return !(this._computeEditing(reviewer, _originalReviewer)
      && this._reviewerSearchId);
    },

    _computeHideDeleteButton(canModifyConfig) {
      return !canModifyConfig;
    },

    _getAccountSuggestions(input) {
      if (input.length === 0) { return Promise.resolve([]); }
      return this._getSuggestedAccounts(
          input).then(accounts => {
            const accountSuggestions = [];
            let nameAndEmail;
            let value;
            if (!accounts) { return []; }
            for (const key in accounts) {
              if (!accounts.hasOwnProperty(key)) { continue; }
              if (accounts[key].email) {
                nameAndEmail = accounts[key].name +
                  ' <' + accounts[key].email + '>';
              } else {
                nameAndEmail = accounts[key].name;
              }
              if (accounts[key].username) {
                value = accounts[key].username;
              } else if (accounts[key].email) {
                value = accounts[key].email;
              } else {
                value = accounts[key]._account_id;
              }
              accountSuggestions.push({
                name: nameAndEmail,
                value,
              });
            }
            return accountSuggestions;
          });
    },

    _getSuggestedAccounts(input) {
      const suggestUrl = `/accounts/?suggest&q=${input}`;
      return this.pluginRestApi.get(suggestUrl);
    },

    _handleDeleteCancel() {
      const detail = {editing: this._editing};
      if (this._editing) {
        this.remove();
      }
      this.dispatchEvent(
          new CustomEvent('reviewer-deleted', {detail, bubbles: true}));
    },

    _handleAddReviewer() {
      const detail = {reviewer: this._reviewerSearchId};
      this._originalReviewer = this.reviewer;
      this.dispatchEvent(
          new CustomEvent('reviewer-added', {detail, bubbles: true}));
    },
  });
})();