"use strict";

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: Cognos Analytics
 * Copyright IBM Corp. 2015, 2016
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define(['underscore', 'q', 'jquery', 'rave2', 'bi/admin/nls/StringResource', 'bi/admin/common/visualizations/VizControl'], function (_, Q, $, rave, StringResource, VizControl) {
  'use strict'; //NOSONAR: meant to be strict

  var StackedContext = function StackedContext(xScale, yScale) {
    return {
      x: function x(d) {
        return xScale(d.x);
      },
      y: function y(d) {
        return yScale(d.y0 + d.y);
      },
      width: xScale.rangeBand(),
      height: function height(d) {
        return yScale(d.y0) - yScale(d.y0 + d.y);
      }
    };
  };

  var GroupedContext = function GroupedContext(xScale, yScale, numLayers, svgHeight) {
    return {
      x: function x(d, i, j) {
        return xScale(d.x) + xScale.rangeBand() / numLayers * j;
      },
      y: function y(d) {
        return yScale(d.y);
      },
      width: xScale.rangeBand() / numLayers,
      height: function height(d) {
        return svgHeight - yScale(d.y);
      }
    };
  };

  var VizStackedBar = VizControl.extend({
    chartMode: 'stacked',
    yticks: 5,
    init: function init(options) {
      this.margin.left = 45;
      this.margin.top = 10;
      this.margin.bottom = 60;
      VizStackedBar.inherited('init', this, arguments);
    },
    _prepareData: function _prepareData(data) {
      this._rawData = data;
      var attr2 = this._attr2Name;

      var da = this._groupData(data, this._attr2Name);

      this._attr2Values = da.map(function (item) {
        return item[0][attr2];
      });
      return da;
    },
    _draw: function _draw(data) {
      var n = data.length,
          m = data[0].layer.length,
          stack = rave.layout.stack().values(function (d) {
        return d.layer;
      }),
          layers = stack(data, function () {}),
          yGroupMax = rave.max(layers, function (l) {
        return rave.max(l.layer, function (d) {
          return d.y;
        });
      }),
          yStackMax = rave.max(layers, function (l) {
        return rave.max(l.layer, function (d) {
          return d.y0 + d.y;
        });
      }),
          yMax = this.chartMode === 'stacked' ? yStackMax : yGroupMax,
          bottom = this.margin.top + this.svgHeight;
      var x = rave.scale.ordinal().domain(rave.range(m)).rangeRoundBands([0, this.svgWidth], 0.1);
      var y = rave.scale.linear().domain([0, yMax * 1.2]).range([this.svgHeight, 0]);
      var xAxis = rave.svg.axis().scale(x).tickSize(5).orient('bottom');
      var maxDataValue = 0;
      data.forEach(function (dataItem) {
        maxDataValue = Math.max(dataItem.total, maxDataValue);
      });
      var yAxis = rave.svg.axis().scale(y).tickSize(5).tickPadding(6).ticks(Math.min(maxDataValue, this.yticks)).orient('left');
      this.svg.append('g').attr('transform', 'translate(' + this.margin.left + ',' + this.margin.top + ')');

      var getColor = function getColor(d) {
        return this._colorScale(d.name);
      };

      var layer = this.svg.selectAll('.layer').data(layers).enter().append('g').attr('class', 'layer').style('fill', getColor.bind(this)).attr('transform', function () {
        return 'translate(' + this.margin.left + ', ' + this.margin.top + ')';
      }.bind(this));
      var context = this.chartMode === 'stacked' ? new StackedContext(x, y, n, this.svgHeight) : new GroupedContext(x, y, n, this.svgHeight);
      var rects = layer.selectAll('rect').data(function (d) {
        return d.layer;
      }).enter().append('rect').attr('x', context.x).attr('y', this.svgHeight).attr('width', context.width).attr('height', 0);
      rects.on('mouseover', function () {
        var rect = rave.select(this);
        var color = rect.style('fill') || '#ddd';
        var rgb = rave.rgb(color).darker();
        rect.style('fill', rgb.toString());
      }).on('mouseout', function () {
        rave.select(this).style('fill', null);
      });
      rects.transition().delay(function (d, i) {
        return i * 20;
      }).attr('y', context.y).attr('height', context.height);
      this.svg.append('g').attr('class', 'bi-chart-axis x-axis').attr('transform', 'translate(' + this.margin.left + ', ' + bottom + ')').call(xAxis);
      var ya = this.svg.append('g').attr('class', 'bi-chart-axis y-axis-stackedbar').attr('transform', 'translate(' + this.margin.left + ', ' + this.margin.top + ')').call(yAxis);
      var rules = this.svg.selectAll('g.bi-chart-rule').data(y.ticks(this.yticks)).enter().append('g').attr('class', 'bi-chart-rule').attr('transform', function (d) {
        return 'translate(' + this.margin.left + ', ' + (this.margin.top + y(d)) + ')';
      }.bind(this));
      rules.append('line').attr('x2', this.svgWidth).style('stroke-opacity', function (d) {
        return d ? .7 : 0;
      });

      var legends = _.map(layers, function (l) {
        return l.name;
      });

      var lx = rave.scale.ordinal().domain(legends).rangeRoundBands([this.margin.left, this.width], 0.1);
      var legend = this.svg.selectAll('.bi-chart-legend').data(layers).enter().append('g').attr('class', 'bi-chart-legend').attr('transform', function (d) {
        return 'translate(' + lx(d.name) + ', ' + (bottom + 30) + ')';
      }.bind(this));
      legend.append('rect').attr('x', 0).attr('width', 18).attr('height', 18).style('fill', getColor.bind(this));
      legend.append('text').attr('x', 24).attr('y', 9).attr('dy', '.35em').text(function (d) {
        return StringResource.get(d.legendName) + (d.total ? ' ( ' + d.total + ' )' : ' ( 0 )');
      });

      var transRules = function (yMax) {
        y.domain([0, yMax * 1.2]);
        ya.transition().duration(300).ease('circle').call(yAxis);
        var rules = this.svg.selectAll('g.bi-chart-rule').data(y.ticks(this.yticks));
        rules.exit().remove();
        rules.enter().append('g').attr('class', 'bi-chart-rule').attr('transform', function (d) {
          return 'translate(' + this.margin.left + ', ' + (this.margin.top + y(d)) + ')';
        }.bind(this));
        rules.enter().append('line').attr('x2', this.svgWidth).style('stroke-opacity', function (d) {
          return d ? .7 : 0;
        });
        rules.transition().duration(300).ease('circle').attr('transform', function (d) {
          return 'translate(' + this.margin.left + ', ' + (this.margin.top + y(d)) + ')';
        }.bind(this));
      }.bind(this);

      var transitionGrouped = function transitionGrouped() {
        transRules(yGroupMax);
        var context = new GroupedContext(x, y, n, this.svgHeight);
        rects.transition().duration(300).delay(function (d, i) {
          return i * 20;
        }).attr('x', context.x).attr('width', context.width).transition().attr('y', context.y).attr('height', context.height);
      };

      var transitionStacked = function transitionStacked() {
        transRules(yStackMax);
        var context = new StackedContext(x, y, n, this.svgHeight);
        rects.transition().duration(300).delay(function (d, i) {
          return i * 20;
        }).attr('y', context.y).attr('height', context.height).transition().attr('x', context.x).attr('width', context.width);
      };

      this._transitionGrouped = transitionGrouped;
      this._transitionStacked = transitionStacked;
    },
    changeMode: function changeMode(mode) {
      if (this.chartMode !== mode) {
        this.chartMode = mode;

        if (mode === 'stacked') {
          this._transitionStacked();
        } else {
          this._transitionGrouped();
        }
      }
    }
  });
  return VizStackedBar;
});