<!--
Copyright (C) 2015 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.
-->

<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../bower_components/iron-ajax/iron-ajax.html">
<link rel="import" href="gr-date-formatter.html">
<link rel="import" href="gr-file-list.html">
<link rel="import" href="gr-messages-list.html">

<dom-module id="gr-change-view">
  <template>
    <style>
      :host {
        background-color: var(--view-background-color);
        display: block;
      }
      .container {
        margin: 1em 0;
        padding-top: 1em;
      }
      h2 {
        padding: 0 var(--default-horizontal-margin);
      }
      section {
        margin: 10px 0;
        padding: 10px var(--default-horizontal-margin);
      }
      table {
        border-collapse: collapse;
      }
      td {
        padding: 2px 5px;
        vertical-align: top;
      }
      .changeInfo-label {
        font-weight: bold;
        text-align: right;
      }
      .summary {
        border-top: 1px solid #ddd;
        border-bottom: 1px solid #ddd;
        font-family: 'Source Code Pro', Menlo, 'Lucida Console', Monaco, monospace;
        overflow-x: auto;
        white-space: pre-wrap;
      }
      gr-file-list {
        padding: 0 var(--default-horizontal-margin) 10px;
      }
    </style>
    <iron-ajax id="detailXHR"
        url="[[_computeDetailPath(changeNum)]]"
        params="[[_computeDetailQueryParams()]]"
        json-prefix=")]}'"
        last-response="{{change}}"></iron-ajax>
    <iron-ajax id="commentsXHR"
        url="[[_computeCommentsPath(changeNum)]]"
        json-prefix=")]}'"
        last-response="{{comments}}"></iron-ajax>

    <div class="container">
      <h2>
        <a href$="[[_computeChangePath(change._number)]]">[[change._number]]</a><span>:</span>
        <span>[[change.subject]]</span>
      </h2>
      <section class="changeInfo">
        <table>
          <tr>
            <td class="changeInfo-label">Owner</td>
            <td>[[change.owner.name]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Reviewers</td>
            <td>
              <template is="dom-repeat"
                        items="[[_computeReviewers(change.labels.Code-Review.all, change.owner)]]"
                        as="reviewer">
                <div>[[reviewer.name]]</div>
              </template>
            </td>
          </tr>
          <tr>
            <td class="changeInfo-label">Project</td>
            <td>[[change.project]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Branch</td>
            <td>[[change.branch]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Topic</td>
            <td>[[change.topic]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Strategy</td>
            <td></td>
          </tr>
          <tr>
            <td class="changeInfo-label">Updated</td>
            <td>
              <gr-date-formatter
                  date-str="[[change.updated]]"></gr-date-formatter>
            </td>
          </tr>
        </table>
      </section>
      <section class="summary">[[_computeCurrentRevisionMessage(change)]]</section>
      <gr-file-list change-num="[[changeNum]]"
                    patch-num="[[_computePatchNum(change.current_revision)]]"
                    revision="[[change.current_revision]]"
                    comments="[[comments]]"></gr-file-list>
      <gr-messages-list change-num="[[changeNum]]"
                        messages="[[change.messages]]"
                        comments="[[comments]]"></gr-messages-list>
    </div>
  </template>
  <script>
  (function() {
    'use strict';

    Polymer({
      is: 'gr-change-view',

      properties: {
        /**
         * URL params passed from the router.
         */
        params: {
          type: Object,
          observer: '_paramsChanged',
        },

        changeNum: Number,
      },

      _paramsChanged: function(value) {
        this.changeNum = value.changeNum;
        if (!this.changeNum) {
          this.change = null;
          this.comments = null;
          return;
        }
        this.$.detailXHR.generateRequest();
        this.$.commentsXHR.generateRequest();
      },

      _computeChangePath: function(changeNum) {
        return '/c/' + changeNum;
      },

      _computeDetailPath: function(changeNum) {
        return '/changes/' + changeNum + '/detail';
      },

      _computeCommitInfoPath: function(changeNum, commitHash) {
        return '/changes/' + changeNum + '/revisions/' + commitHash + '/commit';
      },

      _computeCommentsPath: function(changeNum) {
        return '/changes/' + changeNum + '/comments';
      },

      _computePatchNum: function(revision) {
        return this.change && this.change.revisions[revision]._number;
      },

      _computeDetailQueryParams: function() {
        var options = Changes.listChangesOptionsToHex(
            Changes.ListChangesOption.CURRENT_REVISION,
            Changes.ListChangesOption.CURRENT_COMMIT,
            Changes.ListChangesOption.CHANGE_ACTIONS
        );
        return { O: options };
      },

      _computeCurrentRevisionMessage: function(change) {
        return change &&
            change.revisions[change.current_revision].commit.message;
      },

      _computeReviewers: function(reviewers, owner) {
        if (reviewers.length == 1) { return reviewers; }
        return reviewers.filter(function(reviewer) {
          return reviewer._account_id != owner._account_id;
        });
      },

    });
  })();
  </script>
</dom-module>