/**
 * @license
 * Copyright (C) 2017 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() {
  'use strict';

  const SUGGESTIONS_LIMIT = 15;
  const REF_PREFIX = 'refs/heads/';

  /**
   * @appliesMixin Gerrit.BaseUrlMixin
   * @appliesMixin Gerrit.FireMixin
   * @appliesMixin Gerrit.URLEncodingMixin
   * @extends Polymer.Element
   */
  class GrCreateChangeDialog extends Polymer.mixinBehaviors( [
    Gerrit.BaseUrlBehavior,
    /**
     * Unused in this element, but called by other elements in tests
     * e.g gr-repo-commands_test.
     */
    Gerrit.FireBehavior,
    Gerrit.URLEncodingBehavior,
  ], Polymer.GestureEventListeners(
      Polymer.LegacyElementMixin(
          Polymer.Element))) {
    static get is() { return 'gr-create-change-dialog'; }

    static get properties() {
      return {
        repoName: String,
        branch: String,
        /** @type {?} */
        _repoConfig: Object,
        subject: String,
        topic: String,
        _query: {
          type: Function,
          value() {
            return this._getRepoBranchesSuggestions.bind(this);
          },
        },
        baseChange: String,
        baseCommit: String,
        privateByDefault: String,
        canCreate: {
          type: Boolean,
          notify: true,
          value: false,
        },
        _privateChangesEnabled: Boolean,
      };
    }

    /** @override */
    attached() {
      super.attached();
      if (!this.repoName) { return Promise.resolve(); }

      const promises = [];

      promises.push(this.$.restAPI.getProjectConfig(this.repoName)
          .then(config => {
            this.privateByDefault = config.private_by_default;
          }));

      promises.push(this.$.restAPI.getConfig().then(config => {
        if (!config) { return; }

        this._privateConfig = config && config.change &&
            config.change.disable_private_changes;
      }));

      return Promise.all(promises);
    }

    static get observers() {
      return [
        '_allowCreate(branch, subject)',
      ];
    }

    _computeBranchClass(baseChange) {
      return baseChange ? 'hide' : '';
    }

    _allowCreate(branch, subject) {
      this.canCreate = !!branch && !!subject;
    }

    handleCreateChange() {
      const isPrivate = this.$.privateChangeCheckBox.checked;
      const isWip = true;
      return this.$.restAPI.createChange(this.repoName, this.branch,
          this.subject, this.topic, isPrivate, isWip, this.baseChange,
          this.baseCommit || null)
          .then(changeCreated => {
            if (!changeCreated) { return; }
            Gerrit.Nav.navigateToChange(changeCreated);
          });
    }

    _getRepoBranchesSuggestions(input) {
      if (input.startsWith(REF_PREFIX)) {
        input = input.substring(REF_PREFIX.length);
      }
      return this.$.restAPI.getRepoBranches(
          input, this.repoName, SUGGESTIONS_LIMIT).then(response => {
        const branches = [];
        let branch;
        for (const key in response) {
          if (!response.hasOwnProperty(key)) { continue; }
          if (response[key].ref.startsWith('refs/heads/')) {
            branch = response[key].ref.substring('refs/heads/'.length);
          } else {
            branch = response[key].ref;
          }
          branches.push({
            name: branch,
          });
        }
        return branches;
      });
    }

    _formatBooleanString(config) {
      if (config && config.configured_value === 'TRUE') {
        return true;
      } else if (config && config.configured_value === 'FALSE') {
        return false;
      } else if (config && config.configured_value === 'INHERIT') {
        if (config && config.inherited_value) {
          return true;
        } else {
          return false;
        }
      } else {
        return false;
      }
    }

    _computePrivateSectionClass(config) {
      return config ? 'hide' : '';
    }
  }

  customElements.define(GrCreateChangeDialog.is, GrCreateChangeDialog);
})();