(function () {
  'use strict';

  sc.calcStartOfDay = function(date) {
    return moment(date.day, 'YYYY-MM-DDTHH:mm:ss.sssZ').startOf('day')._d;
  };

  sc.drawMoodEmotionGraphs = function(graphParameters) {
    var NOTES = '*Click each day for more information.';

    function clearContainers() {
      $('div#mood, div#mood-legend, div#emotions, div#emotion-legend')
        .empty();
    }

    function drawMoodViz(graphParameters) {
      var GRAPH_DIV_ID = '#mood';
      var GRAPH_TITLE = 'Mood*';
      var LEGEND = [['Mood', '#4682B4'], ['Daily Average', 'green']];
      var LEGEND_DIV_ID = '#mood-legend';
      var PIXEL_HEIGHT = 300;
      var Y_MAX = 10;
      var Y_MIN = 0;
      var YLABEL = 'mood';

      d3.select(GRAPH_DIV_ID)
        .datum(graphParameters.moodData)
          .call(columnChart(graphParameters.startDate, graphParameters.endDate, Y_MIN, Y_MAX, GRAPH_TITLE, YLABEL)
            .width(graphParameters.graphWidth)
            .height(PIXEL_HEIGHT)
            .x(function(date, i) {
              return sc.calcStartOfDay(date);
            })
            .y(function(d, i) {
              return d.intensity;
            })
            .drawLegend(LEGEND_DIV_ID, LEGEND, [NOTES]));
    }

    function drawEmotionViz(graphParameters) {
      var GRAPH_DIV_ID = '#emotions';
      var GRAPH_TITLE = 'Positive and Negative Emotions*';
      var LEGEND = [['Positive', '#4682B4'], ['Negative', '#A52A2A'], ['Daily Average', 'green']];
      var LEGEND_DIV_ID = '#emotion-legend';
      var PIXEL_HEIGHT = 400;
      var Y_MAX = 10;
      var Y_MIN = -10;
      var YLABEL = 'Intensity';

      d3.select(GRAPH_DIV_ID)
        .datum(graphParameters.emotionsData)
          .call(columnChart(graphParameters.startDate, graphParameters.endDate, Y_MIN, Y_MAX, GRAPH_TITLE, YLABEL)
            .width(graphParameters.graphWidth)
            .height(PIXEL_HEIGHT)
            .drawLegend(LEGEND_DIV_ID, LEGEND, [NOTES]));
    }

    clearContainers();
    drawMoodViz(graphParameters);
    drawEmotionViz(graphParameters);
    return appendDateRange(graphParameters);
  };
})();