<!-- The <explore-sk> custom element declaration.

  Main page of Perf, for exploring data.

  Attributes:
    None.

  Events:
    None.

  Methods:
    None.

-->
<link rel="import" href="/res/imp/bower_components/iron-flex-layout/iron-flex-layout-classes.html">
<link rel="import" href="/res/imp/bower_components/iron-icon/iron-icon.html">
<link rel="import" href="/res/imp/bower_components/iron-icons/iron-icons.html">
<link rel="import" href="/res/imp/bower_components/paper-input/paper-input.html">
<link rel="import" href="/res/imp/bower_components/paper-spinner/paper-spinner.html">
<link rel="import" href="/res/imp/bower_components/paper-tabs/paper-tabs.html">
<link rel="import" href="/res/imp/bower_components/paper-checkbox/paper-checkbox.html">

<link rel="import" href="/res/common/imp/query2-sk.html" />
<link rel="import" href="/res/common/imp/paramset.html" />
<link rel="import" href="/res/common/imp/query-summary-sk.html" />
<link rel="stylesheet" href="/res/common/css/md.css">

<link rel="import" href="/res/imp/plot-simple.html" />
<link rel="import" href="/res/imp/commit-detail-panel.html" />
<link rel="import" href="/res/imp/highlight.html" />
<link rel="import" href="/res/imp/day-range.html" />
<link rel="import" href="/res/imp/json-source.html" />

<dom-module id="explore-sk">
  <style include="iron-flex iron-flex-alignment iron-positioning">
    h3 {
      margin: 0.5em 0 0 0;
    }

    paper-input-decorator {
      margin: 0.5em 0;
    }

    #selections {
      margin: 0 1em;
    }

    #commits,
    #paramset {
      display: inline-block;
      margin: 0.5em;
      overflow-y: auto;
    }

    #paramset {
      height: 480px;
    }

    #details.hidden,
    #queryTab.hidden,
    #commits.hidden,
    #paramset.hidden,
    #simple_paramset.hidden {
      display: none;
    }

    paper-checkbox {
      --paper-checkbox-checked-color: #1f78b4;
      --paper-checkbox-checked-ink-color: #1f78b4;
      --paper-checkbox-unchecked-color: #1f78b4;
      --paper-checkbox-unchecked-ink-color: #1f78b4;
      --paper-checkbox-label-color: #1f78b4;
      margin: 0.6em;
    }

    paper-tabs {
      background: #A6CEE3;
      color: #555;
    }

    paper-tab.iron-selected {
      background: #1F78B4;
      color: white;
      border: #1F78B4 solid 2px;
    }

    paper-tab {
      border: white solid 2px;
    }

    #tabs {
      margin: 1em 0 0 1em;
    }

    #detail {
      border: #1F78B4 2px solid;
      margin: 0;
    }

    #queryTab {
      margin: 1em;
    }

    #buttons {
      margin: 1em;
    }

    iron-icon {
      color: #1F78B4;
    }

    day-range-sk {
      display: block;
    }

    #commits {
      margin: 1em;
    }

    #simple_paramset {
      margin: 1em 0 1em 1em;
    }

    #percent {
      margin: 0.6em;
      font-family: 'Roboto Mono',monospace;
      width: 3em;
    }

  </style>
  <template>
    <div>
      <div class="layout vertical">
        <div class="layout horizontal">
          <div id=plotDiv class="layout flex">
            <highlightbar-sk id=highlight></highlightbar-sk>
            <plot-simple-sk width=1024 height=256 id=plot></plot-simple-sk>
            <div class="layout horizontal center-justified">
              <day-range-sk id=range on-day-range-change="_rangeChange"></day-range-sk>
              <paper-spinner id=spinner></paper-spinner>
              <span id=percent></span>
            </div>
          </div>
          <div class="layout vertical" id=buttons>
            <button on-click="_removeHighlighted" title="Remove all the highlighted traces.">Remove Highlighted</button>
            <button on-click="_removeAll" title="Remove all the traces.">Remove All</button>
            <button on-click="_highlightedOnly" title="Remove all but the highlighted traces.">Highlighted Only</button>
            <button on-click="_clearHighlights" title="Remove highlights from all traces.">Clear Highlights</button>
            <button on-click="_resetAxes" title="Reset back to the original zoom level.">Reset Axes</button>
            <button on-click="_shiftBoth" title="Expand the display [[_numShift]] commits in
              both directions.">&lt;&lt; +[[_numShift]] &gt;&gt;</button>
            <button on-click="_shiftLeft" title="Move 10 commits in the past.">&lt;&lt; [[_numShift]]</button>
            <button on-click="_shiftRight" title="Move 10 commits in the future.">[[_numShift]] &gt;&gt;</button>
            <div>
              <button on-click="_zoomToRange" id=zoom_range disabled title="Fit the time range to the current zoom window.">Zoom Range</button>
              <span title="Number of commits skipped between each point displayed." hidden="[[_isZero(_dataframe.skip)]]" id=skip>[[_dataframe.skip]]</span>
            </div>
            <paper-checkbox checked="{{_show_zero}}" title="Toggle the presence of the zero line.">Zero</paper-checkbox>
          </div>
        </div>
        <div id=tabs class="flex">
          <paper-tabs selected=0 id=detailtab no-bar on-iron-select="_tabSelect">
            <paper-tab>Query</paper-tab>
            <paper-tab>Params</paper-tab>
            <paper-tab id=commitsTab disabled>Details</paper-tab>
          </paper-tabs>
          <div id=detail>
            <div id=queryTab class="layout vertical">
              <div class="layout horizontal">
                <query2-sk id=query></query2-sk>
                <div class="layout vertical" id=selections>
                  <h3>Selections</h3>
                  <query-summary-sk id=summary></query-summary-sk>
                  <div>
                    Matches: <span id=matches></span>
                  </div>
                  <button on-tap="_add" class=action>Plot</button>
                </div>
              </div>
              <h3>Calculated Traces</h3>
              <div class="layout horizontal center">
                <paper-input-decorator floatingLabel label="Formula" flex>
                  <textarea id="formula" rows=3 cols=80></textarea>
                </paper-input-decorator>
                <button on-tap="_addCalculated" class=action>Add</button>
                <a href="/help/" target=_blank><iron-icon icon="help"></iron-icon></a>
              </div>
            </div>
            <paramset-sk id=paramset class=hidden clickable-values></paramset-sk>
            <div id=details class="layout horizontal wrap hidden">
              <paramset-sk id=simple_paramset clickable-values></paramset-sk>
              <div class="layout vertical">
                <commit-detail-panel-sk id=commits></commit-detail-panel-sk>
                <json-source id=jsonsource></json-source>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </template>
</dom-module>

<script>
  Polymer({
    is: "explore-sk",

    properties: {
      // Keep track of the data sent to plot.
      _lines: {
        type: Object,
        value: function() { return {}; },
      },
      _dataframe: {
        type: Object,
        value: function() { return {
          traceset: {},
        }; },
      },
      // Keep track of whether a request is inflight to count the number of traces that match the current query.
      _countInProgress: {
        type: Boolean,
        value: false,
      },
      // The state that goes into the URL.
      //
      state: {
        type: Object,
        value: function() { return {
          begin: Math.floor(Date.now()/1000 - 24*60*60),
          end: Math.floor(Date.now()/1000),
          formulas: [],
          queries: [],
          keys: "",  // The id of the shortcut to a list of trace keys.
          xbaroffset: -1, // The offset of the commit in the repo.
        }; },
      },
      // The [begin, end] timestamps of the region
      // that the user is zoomed in on.
      _zoomRange: {
        type: Array,
        value: function() { return []; },
      },
      // The id of the current frame request. Will be the empty string
      // if there is no pending request.
      _requestId: {
        type: String,
        value: "",
      },
      _show_zero: {
        type: Boolean,
        value: true,
        observer: "_zeroChanged",
      },
      _numShift: {
        type: Number,
        value: sk.perf.num_shift,
      },
    },


    ready: function() {
      this.ZERO_NAME = "special_zero";

      // Populate the query element.
      var tz = Intl.DateTimeFormat().resolvedOptions().timeZone;
      sk.get("/_/initpage/?tz=" + tz).then(JSON.parse).then(function(json) {
        var header = json.dataframe.header;
        this.state.begin = this.$.range.begin = header[0].timestamp;
        this.state.end   = this.$.range.end   = header[header.length-1].timestamp+1;
        this.$.query.setKeyOrder(sk.perf.key_order);
        this.$.query.setParamset(json.dataframe.paramset);

        // Remove the paramset so it doesn't get displayed in the Params tab.
        json.dataframe.paramset = {};

        // Display this SearchResult, which has no traces, but this will
        // set up the tick marks, the skp bands, and the 0-trace.
        this._addTraces(json, true, false);

        // From this point on reflect the state to the URL.
        this._startStateReflector();
      }.bind(this)).catch(sk.errorMessage);

      // Reflect the current query to the query summary.
      this.$.query.addEventListener("query-change", function(e){
        var query = e.detail.q;
        this.$.summary.selection = query;
        this._updateCount();
        var formula = this.$.formula.value;
        if (formula == "") {
          this.$.formula.value = 'filter("' + query + '")';
        } else if (2 == (formula.match(/\"/g) || []).length) {
          // Only update the filter query if there's one string in the formula.
          this.$.formula.value = formula.replace(/".*"/, '"' + query + '"');
        }
      }.bind(this));

      // Highlight trace when a paramset value is clicked.
      this.$.paramset.addEventListener("paramset-key-value-click",
        this._paramsetKeyValueClick.bind(this));
      this.$.simple_paramset.addEventListener("paramset-key-value-click",
        this._paramsetKeyValueClick.bind(this));

      // Reflect the focused trace in the paramset.
      this.$.plot.addEventListener("trace_focused", function(e) {
        this.$.paramset.clearHighlight();
        this.$.paramset.setHighlight(sk.key.toObject(e.detail.id));
        this.$.highlight.key = e.detail.id;
        this.$.highlight.value = e.detail.pt[1];
      }.bind(this));

      // User has zoomed in on the graph.
      this.$.plot.addEventListener("zoom", function(e) {
        var begin = this._dataframe.header[Math.floor(e.detail.xMin)].timestamp;
        var endIndex = Math.min(Math.floor(e.detail.xMax), this._dataframe.header.length-1);
        var end = this._dataframe.header[endIndex].timestamp+1;
        this._zoomRange = [begin, end];
        this.$.zoom_range.disabled = false;
      }.bind(this));

      // Highlight a trace when it is clicked on.
      this.$.plot.addEventListener("trace_selected", function(e) {
        this.$.plot.clearHighlight();
        this.$.plot.setHighlight(e.detail.id);
        this.$.commits.setCommitDetail([]);

        var x = +e.detail.pt[0]|0;
        // loop backwards from x until you get the next
        // non 1e32 point.
        var commits = [this._dataframe.header[x]];
        var trace = this._dataframe.traceset[e.detail.id];
        for (var i = x-1; i >= 0; i--) {
          if (trace[i] != 1e32) {
            break;
          }
          commits.push(this._dataframe.header[i]);
        }
        // Convert the trace id into a paramset to display.
        var params = sk.key.toObject(e.detail.id);
        var paramset = {}
        Object.keys(params).forEach(function(key) {
          paramset[key] = [params[key]];
        });
        // Request populated commits from the server.
        sk.post("/_/cid/", JSON.stringify(commits)).then(JSON.parse).then(function(json){
          this.$.commits.setCommitDetail(json);
          this.$.commitsTab.disabled = false;
          this.$.simple_paramset.setParamSets([paramset]);
          this.$.detailtab.selected = 2;
          this.$.jsonsource.cid = commits[0];
          this.$.jsonsource.traceid = e.detail.id;
        }.bind(this)).catch(sk.errorMessage);
      }.bind(this));

      this._updateCount();
      this._resizeWatcher();
    },

    _startStateReflector: function() {
      sk.stateReflector(this,  function() {
        this.$.range.begin = this.state.begin;
        this.$.range.end = this.state.end;
        this._rangeChangeImpl(this.state.begin, this.state.end);
      }.bind(this));
    },

    _paramsetKeyValueClick: function(e) {
      var keys = [];
      Object.keys(this._lines).forEach(function(key) {
        if (sk.key.matches(key, e.detail.key, e.detail.value)) {
          keys.push(key);
        }
      });
      // Additively highlight if the ctrl key is pressed.
      if (!e.detail.ctrl) {
        this.$.plot.clearHighlight();
      }
      this.$.plot.setHighlight(keys);
    },

    // Fit the time range to the zoom being displayed.
    // Reload all the queries/formulas on the new time range.
    _zoomToRange: function() {
      this.$.range.begin = this._zoomRange[0];
      this.$.range.end = this._zoomRange[1];
      this._rangeChangeImpl(this._zoomRange[0], this._zoomRange[1]);
    },

    // Called when the day-range slider has changed, causes all the
    // queries/formulas to be reloaded for the new time range.
    _rangeChange: function(e) {
      this._rangeChangeImpl(e.detail.begin, e.detail.end);
    },

    _shiftBoth: function(e) {
      this._shiftImpl(-this._numShift, this._numShift);
    },

    _shiftRight: function(e) {
      this._shiftImpl(this._numShift, this._numShift);
    },

    _shiftLeft: function(e) {
      this._shiftImpl(-this._numShift, -this._numShift);
    },

    // Change the current range by the following +/- offsets.
    _shiftImpl: function(beginOffset, endOffset) {
      var body = {
        begin:        this.state.begin,
        begin_offset: beginOffset,
        end:          this.state.end,
        end_offset:   endOffset,
      }
      sk.post('/_/shift/', JSON.stringify(body)).then(JSON.parse).then(function(json) {
        this._rangeChangeImpl(json.begin, json.end);
      }.bind(this)).catch(sk.errorMessage);
    },

    // Reload all the queries/formulas on the given time range.
    _rangeChangeImpl: function(begin, end) {
      this.state.begin = begin;
      this.state.end = end;
      if (this.state.formulas.length == 0 && this.state.queries.length == 0 && this.state.keys == "") {
        return
      }
      var body = {
        begin: this.state.begin,
        end: this.state.end,
        formulas: this.state.formulas,
        queries: this.state.queries,
        keys: this.state.keys,
      };
      var switchToTab = body.formulas.length > 0 || body.queries.length > 0 || body.keys != "";
      this._requestFrame(body, function(json) {
        this.$.plot.removeAll();
        this._lines = [];
        this._addTraces(json, false, switchToTab);
        this.$.zoom_range.disabled = true;
      }.bind(this));
    },

    _updateCount: function() {
      if (this._countInProgress === true) {
        return
      }
      this._countInProgress = true;
      sk.post("/_/count/", this.$.query.current_query, "application/x-www-form-urlencoded").then(JSON.parse).then(function(json) {
        this._countInProgress = false;
        this.$.matches.textContent = json.count;
      }.bind(this)).catch(function() {
        this._countInProgress = false;
      });
    },

    _zeroChanged: function() {
      if (!this._dataframe.header) {
        return;
      }
      if (this._show_zero) {
        var line = [];
        for (var i = 0; i < this._dataframe.header.length; i++) {
          line.push([i, 0]);
        }
        var lines = {};
        lines[this.ZERO_NAME] = line;
        this.$.plot.addLines(lines);
      } else {
        this.$.plot.deleteLine(this.ZERO_NAME);
      }
      this.$.plot.resetAxes();
    },

    // _addTraces adds the traces to the graph in the serialized SearchResults
    // found in json. If incremental is true then the traces are added w/o
    // removing the old traces. If tab is true then the details tab is
    // switched to the params for the displayed traces.
    _addTraces: function(json, incremental, tab) {
      var dataframe = json.dataframe;
      var lines = {};

      // Add in the 0-trace.
      if (this._show_zero) {
        dataframe.traceset[this.ZERO_NAME] = Array(dataframe.header.length).fill(0);
      }

      // Convert the dataframe into a form suitable for the plot element.
      var keys = Object.keys(dataframe.traceset);
      keys.forEach(function(key) {
        var values = [];
        dataframe.traceset[key].forEach(function(y, x) {
          if (y != 1e32) {
            values.push([x, y]);
          }
        });
        lines[key] = values;
      });

      if (incremental) {
        Object.keys(lines).forEach(function(key) {
          this._lines[key] = lines[key];
        }.bind(this));
        if (this._dataframe.header == undefined) {
          this._dataframe = dataframe;
        } else {
          Object.keys(dataframe.traceset).forEach(function(key) {
            this._dataframe.traceset[key] = dataframe.traceset[key];
          }.bind(this));
        }
      } else {
        this._lines = lines;
        this._dataframe = dataframe;
      }
      if (!incremental) {
        this.$.plot.removeAll();
      }
      this.$.plot.addLines(this._lines);

      // Ticks are serialized as a slice of slices, ala [[0, "foo"], [1.5, "bar"], ..]
      // because the structure we actually need, a map[float64]string, isn't able
      // to be serialized as JSON, so we transform the representations here.
      //
      // TODO(jcgregorio) Once we are the only customer of plot-simple-sk, then change
      //   signature of setTicks().
      var tickmap = {};
      json.ticks.forEach(function(t) {
        tickmap[t[0]] = t[1];
      });
      this.$.plot.setTicks(tickmap);

      // Always add in the last index so we draw a band if there's an odd
      // number of skp updates.
      json.skps.push(json.dataframe.header.length-1);

      var bands = [];
      for (var i = 1; i < json.skps.length; i+=2) {
        bands.push([json.skps[i-1], json.skps[i]]);
      }
      this.$.plot.setBanding(bands);

      // Populate the xbar if present.
      if (this.state.xbaroffset != -1) {
        var xbaroffset = this.state.xbaroffset;
        var xbar = -1;
        this._dataframe.header.forEach(function(h, i) {
          if (h.offset == xbaroffset) {
            xbar = i;
          }
        });
        if (xbar != -1) {
          this.$.plot.setXBar(xbar);
        } else {
          this.$.plot.clearXBar();
        }
      } else {
        this.$.plot.clearXBar();
      }


      // Populate the paramset element.
      this.$.paramset.setParamSets([dataframe.paramset]);
      if (tab) {
        this.$.detailtab.selected = 1;
      }
    },

    _add: function() {
      var q = this.$.query.current_query.trim();
      if (q == "") {
        return
      }
      if (this.state.queries.indexOf(q) == -1) {
        this.state.queries.push(q);
      }
      var body = {
        begin: this.state.begin,
        end: this.state.end,
        queries: [q],
      };
      this._requestFrame(body, function(json) {
        this._addTraces(json, true, true);
      }.bind(this));
    },

    _tabSelect: function() {
      var sel = this.$.detailtab.selected;
      this.$.queryTab.classList.toggle('hidden', !(sel == 0));
      this.$.paramset.classList.toggle('hidden', !(sel == 1));
      this.$.details.classList.toggle('hidden', !(sel == 2));
    },


    // Watch the size of the plot parents element and when it changes then
    // then resize the plot element to match.
    _resizeWatcher: function () {
      this.async(this._resizeWatcher.bind(this), 300);

      var w = Math.round(window.getComputedStyle(this.$.plotDiv, null).getPropertyValue('width').slice(0, -2));
      if (w != this.$.plot.width) {
        this.$.plot.setAttribute('width', w);

        // Measure again since the resize of svg might have caused a tiny change in the size of
        // the parent window.
        w = Math.round(window.getComputedStyle(this.$.plotDiv, null).getPropertyValue('width').slice(0, -2));
        this.$.plot.setAttribute('width', w);
        this.$.plot.resetAxes();
      }
    },

    _removeAll: function() {
      this.state.formulas = [];
      this.state.queries = [];
      this.state.keys = "";
      this.$.plot.removeAll();
      this._lines = [];
    },

    // When Remove Highlighted or Highlighted Only are pressed then create a
    // shortcut for just the traces that are displayed.
    //
    // Note that removing a trace doesn't work if the trace came from a
    // formula that returns multiple traces. This is a known issue that
    // isn't currently worth solving.
    _reShortCut: function(keys) {
        if (keys.length == 0) {
          this.state.keys = "";
          this.state.queries = [];
          return
        }
        var state = {
          keys: keys,
        };
        sk.post('/_/keys/', JSON.stringify(state)).then(JSON.parse).then(function (json) {
          this.state.keys = json.id;
          this.state.queries = [];
        }.bind(this));
    },

    _removeHighlighted: function() {
      var ids = this.$.plot.highlighted();
      var toadd = {};
      var toShortcut = [];

      Object.keys(this._dataframe.traceset).forEach(function(key) {
        if (ids.indexOf(key) != -1) {
          // Detect if it is a formula being removed.
          if (this.state.formulas.indexOf(key) != -1) {
            this.state.formulas.splice(this.state.formulas.indexOf(key), 1)
          }
          return
        }
        if (key[0] == ",") {
          toShortcut.push(key);
        }
        var values = [];
        this._dataframe.traceset[key].forEach(function(y, x) {
          if (y != 1e32) {
            values.push([x, y]);
          }
        });
        toadd[key] = values;
      }.bind(this));

      // Remove the traces from the traceset so they don't reappear.
      ids.forEach(function(key) {
        if (this._dataframe.traceset[key] != undefined) {
          delete this._dataframe.traceset[key];
        }
      }.bind(this));

      this._lines = toadd;
      this.$.plot.removeAll();
      this.$.plot.addLines(toadd);
      this._reShortCut(toShortcut);
    },

    _highlightedOnly: function() {
      var ids = this.$.plot.highlighted();
      var toadd = {};
      var toremove = [];
      var toShortcut = [];

      Object.keys(this._dataframe.traceset).forEach(function(key) {
        if (ids.indexOf(key) == -1 && !key.startsWith("special")) {
          // Detect if it is a formula being removed.
          if (this.state.formulas.indexOf(key) != -1) {
            this.state.formulas.splice(this.state.formulas.indexOf(key), 1)
          } else {
            toremove.push(key);
          }
          return
        }
        if (key[0] == ",") {
          toShortcut.push(key);
        }
        var values = [];
        this._dataframe.traceset[key].forEach(function(y, x) {
          if (y != 1e32) {
            values.push([x, y]);
          }
        });
        toadd[key] = values;
      }.bind(this));

      // Remove the traces from the traceset so they don't reappear.
      Object.keys(this._dataframe.traceset).forEach(function(key) {
        if (key in toremove) {
          delete this._dataframe.traceset[key];
        }
      }.bind(this));

      this._lines = toadd;
      this.$.plot.removeAll();
      this.$.plot.addLines(toadd);
      this._reShortCut(toShortcut);
    },

    _clearHighlights: function() {
      this.$.plot.clearHighlight();
    },

    _resetAxes: function() {
      this.$.plot.resetAxes();
      this.$.zoom_range.disabled = true;
    },

    _addCalculated: function() {
      var f = this.$.formula.value;
      if (f.trim() == "") {
        return
      }
      if (this.state.formulas.indexOf(f) == -1) {
        this.state.formulas.push(f);
      }
      var body = {
        begin: this.state.begin,
        end: this.state.end,
        formulas: [f],
      };
      this._requestFrame(body, function(json) {
        // TODO(jcgregorio) Remove all returned trace ids from hidden.
        this._addTraces(json, true, false);
      }.bind(this));
    },

    // Common catch function for _requestFrame and _checkFrameRequestStatus.
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        sk.errorMessage(msg, 10000);
      }
      this.$.percent.textContent = "";
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    // Requests a new dataframe, where body is a serialized FrameRequest:
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    //    end:      1476706336,
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    //    hidden:   [],
    //    queries:  [
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    //    tz:       "America/New_York"
    // };
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    _isZero: function(n) {
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</script>