- @no_container = true
- page_title "Commits", "Graphs"
= render 'head'

%div{ class: container_class }
  .sub-header-block
    .tree-ref-holder
      = render 'shared/ref_switcher', destination: 'graphs_commits'
    %ul.breadcrumb.repo-breadcrumb
      = commits_breadcrumbs

  %p.lead
    Commit statistics for
    %strong #{@ref}
    #{@commits_graph.start_date.strftime('%b %d')} - #{@commits_graph.end_date.strftime('%b %d')}

  .row
    .col-md-6
      %ul
        %li
          %p.lead
            %strong #{@commits_graph.commits.size}
            commits during
            %strong #{@commits_graph.duration}
            days
        %li
          %p.lead
            Average
            %strong #{@commits_graph.commit_per_day}
            commits per day
        %li
          %p.lead
            Contributed by
            %strong #{@commits_graph.authors}
            authors
    .col-md-6
      %div
        %p.slead
          Commits per day of month
        %canvas#month-chart
  .row
    .col-md-6
      %div
        %p.slead
          Commits per day hour (UTC)
        %canvas#hour-chart
    .col-md-6
      %div
        %p.slead
          Commits per weekday
        %canvas#weekday-chart

:javascript
  var responsiveChart = function (selector, data) {
    var options = { "scaleOverlay": true, responsive: true, pointHitDetectionRadius: 2, maintainAspectRatio: false };
    // get selector by context
    var ctx = selector.get(0).getContext("2d");
    // pointing parent container to make chart.js inherit its width
    var container = $(selector).parent();
    var generateChart = function() {
      selector.attr('width', $(container).width());
      if (window.innerWidth < 768) {
        // Scale fonts if window width lower than 768px (iPad portrait)
        options.scaleFontSize = 8
      }
      return new Chart(ctx).Bar(data, options);
    };
    // enabling auto-resizing
    $(window).resize(generateChart);
    return generateChart();
  };

  var chartData = function (keys, values) {
    var data = {
      labels : keys,
      datasets : [{
        fillColor : "rgba(220,220,220,0.5)",
        strokeColor : "rgba(220,220,220,1)",
        barStrokeWidth: 1,
        barValueSpacing: 1,
        barDatasetSpacing: 1,
        data : values
      }]
    };
    return data;
  };

  var hourData = chartData(#{@commits_per_time.keys.to_json}, #{@commits_per_time.values.to_json});
  responsiveChart($('#hour-chart'), hourData);

  var dayData = chartData(#{@commits_per_week_days.keys.to_json}, #{@commits_per_week_days.values.to_json});
  responsiveChart($('#weekday-chart'), dayData);

  var monthData = chartData(#{@commits_per_month.keys.to_json}, #{@commits_per_month.values.to_json});
  responsiveChart($('#month-chart'), monthData);
