<!--
  The <patch-sk> custom element declaration. Allows entering a CL in the form of
  https://codereview.chromium.org/1344993003 (or just the CL number) to retrieve a patch from that
  CL. Alternatively, allows entering a patch manually in an expanding text area.

  Attributes:
    patchType: Specifies the project for the patch. Must be set. Supported values include
      "chromium" and "skia". See also encodeCLData in
      ct/go/ctfe/chromium_perf/chromium_perf.go.
    cl: Raw value of the CL input. Does not notify.
    clDescription: Human-readable description of the CL. Notifies.
    patch: The patch, either retrieved from the CL or manually entered/modified. Notifies.

  Events:
    None.

  Methods:
    validate(): Checks that patch is valid based on cl. If not, shows an error toast and returns
      false. Otherwise returns true.
-->

<dom-module id="patch-sk">
  <style>
    paper-input {
      width: 25em;
    }

    .long-field {
      width: 40em;
    }

    td.cl-label {
      vertical-align: middle;
    }

    .cl-detail-container {
      position: relative;
      text-align: center;
      height: 100px;
      min-width: 200px;
      max-width: 300px;
    }

    .loading-cl-spinner {
      margin: auto;
      vertical-align: middle;
    }

    .cl-detail {
      position: absolute;
      top: 0px;
      left: 0px;
      text-align: start;
    }

    .cl-error {
      color: red;
    }
  </style>
  <template>
    <table>
      <tr>
        <td class="cl-label">CL:</td>
        <td>
          <paper-input value="{{cl}}" label="Please paste a complete Gerrit URL" no-label-float></paper-input>
          <a href="javascript:void(0);" id="patch_expander">
            <iron-icon icon="{{patchExpanderIcon(patchOpened)}}"></iron-icon>
            Specify patch manually</a>
        </td>
        <td>
          <div class="cl-detail-container">
            <div class="loading-cl-spinner">
              <paper-spinner active="{{loadingClDetail}}"
                             alt="Loading CL details"></paper-spinner>
            </div>
            <div class="cl-detail">
              <a href$="{{clUrl(clData)}}" target="_blank">{{formatClData(clData)}}</a>
              <span class="cl-error">{{formatClError(clData)}}</span>
            </div>
        </td>
      </tr>
      <tr>
        <td colspan="3">
          <div class="long-field">
           <iron-collapse id="patch_collapse" opened="{{patchOpened}}">
             <iron-autogrow-textarea class="long-field" rows=5 max-rows=20 bind-value="{{patch}}">
             </iron-autogrow-textarea>
           </iron-collapse>
          </div>
        </td>
      </tr>
    </table>
  </template>
  <script>
    Polymer({
      is: "patch-sk",
      properties: {
        patchType: String,
        cl: {
          type: String,
          value: "",
          observer: "clChanged",
        },
        clData: Object,
        loadingClDetail: {
          type: Boolean,
          value: false,
        },
        clDescription: {
          type: String,
          computed: "formatClDescription(clData)",
          notify: true,
        },
        patchOpened: {
          type: Boolean,
          value: false,
        },
        patch: {
          type: String,
          notify: true,
        },
      },

      ready: function() {
        var that = this;
        this.$.patch_expander.addEventListener('click', function(e) {
          that.$.patch_collapse.toggle();
        });
      },

      clChanged: function(newValue) {
        if (!newValue || newValue.length < 3) {
          this.clData = null;
          this.loadingClDetail = false;
          return;
        }
        this.loadingClDetail = true;
        var params = {cl: newValue};
        sk.post("/_/cl_data?" + sk.query.fromObject(params)).then(JSON.parse).then(function (json) {
          if (this.cl == newValue) {
            if (json.cl) {
              this.clData = json;
              var patch = this.clData[this.patchType + "_patch"];
              if (!patch) {
                this.clData = {error: {response: "This is not a " + this.patchType + " CL."}};
              } else {
                this.patch = patch;
              }
            } else {
              this.clData = null;
            }
            this.loadingClDetail = false;
          }
        }.bind(this)).catch(function (err) {
          if (this.cl == newValue) {
            this.clData = {error: err};
            this.loadingClDetail = false;
          }
        }.bind(this));
      },

      clUrl: function(clData) {
        if (clData && !clData.error) {
          return clData.url;
        }
        return "javascript:void(0);"
      },

      formatClData: function(clData) {
        if (clData && !clData.error) {
          return clData.subject +
              " (modified " + ctfe.getFormattedTimestamp(clData.modified) + ")";
        }
        return "";
      },

      formatClError: function(clData) {
        if (clData && clData.error) {
          return clData.error.response;
        }
        return "";
      },

      formatClDescription: function(clData) {
        if (clData && !clData.error) {
          return this.clUrl(clData) + " (" + clData.subject + ")";
        }
        return ""
      },

      patchExpanderIcon: function(patchOpened) {
        if (patchOpened) {
          return "expand-less";
        } else {
          return "expand-more";
        }
      },

      validate: function() {
        if (this.cl && !this.clData) {
          sk.errorMessage("Unable to load " + this.patchType + " CL " + this.cl +
                          ". Please specify patches manually.");
          return false;
        }
        if (this.cl && !this.patch) {
          sk.errorMessage("Unable to fetch " + this.patchType + " patch from CL " + this.cl +
                          ". Please specify patches manually.");
          return false;
        }
        return true;
      },
    });
  </script>

</dom-module>