var m = [20, 120, 20, 20],
    w = 1280 - m[1] - m[3],
    h = 2200 - m[0] - m[2],
    i = 0,
    root;


var tree = d3.layout.tree()
    .size([h, w]);


var diagonal = d3.svg.diagonal()
    .projection(function(d) { return [d.y, d.x]; });

var vis = d3.select("#body").append("svg:svg")
    .attr("width", w + m[1] + m[3])
    .attr("height", h + m[0] + m[2])
  .append("svg:g")
    .attr("transform", "translate(" + m[3] + "," + m[0] + ")");

var adcolor=d3.scale.category20();

d3.json("dept_json.php", function(json) {
  root = json;
  root.x0 = h / 2;
  root.y0 = 0;

  function toggleAll(d) {
    if (d.children) {
      d.children.forEach(toggleAll);
      toggle(d);
    }
  }

  
  
  
  
  
  

  update(root);
});

function update(source) {
  var duration = d3.event && d3.event.altKey ? 5000 : 500;

  
  var nodes = tree.nodes(root).reverse();

  
  nodes.forEach(function(d) { d.y = d.depth * 180; });

  
  var node = vis.selectAll("g.node")
      .data(nodes, function(d) { return d.id || (d.id = ++i); });

  
  var nodeEnter = node.enter().append("svg:g")
      
      .attr("class", function(d) { return (d.type=="ad") ? "node-ad" : "node"; })
       .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
      
      ;

  nodeEnter.append("svg:circle")
      .attr("r", 1e-6)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

d3.selectAll(".node-ad").append("rect")
                .attr("class","shadow")
                .style("fill", function (d,i) {return adcolor(i);})
                
                .attr("height", 20)
                .attr("transform", "translate(" + 2 + "," + -10 + ")")
                .attr("rx", 2)
                .attr("ry", 2)
                
                
                 .attr("width", function (d) {return d.name.replace(/[^\x00-\xff]/g,"01").length*10;})
                 ;
 d3.selectAll(".node-ad")
                .on("mouseover", function(d){
                    d3.select(this).select("rect")
                    .attr("stroke","#4D4D4D")
                    .attr("stroke-width","2");
                     })
                .on("mouseout", function(d){
                    d3.select(this).select("rect")
                    
                    .attr("stroke-width","0");
                     });
 
  nodeEnter.append('a')
      .attr('xlink:href', function(d) {
        return d.url;
      })
      .attr("target","blank")
      .append("svg:text")
      .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
      .attr("dy", ".35em")
      .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
      .text(function(d) { return d.name; })
      .style('fill', function(d) {
         if(d.type=="ad")
            return '#fff';
        return d.free ? 'black' : '#999';
      })
     
      ;



  nodeEnter.append("svg:title")
    .text(function(d) {
      return d.description;
    });

  
  var nodeUpdate = node.transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

  nodeUpdate.select("circle")
      .attr("r", 6)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

  nodeUpdate.select("text")
      .style("fill-opacity", 1);

  
  var nodeExit = node.exit().transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
      .remove();

  nodeExit.select("circle")
      .attr("r", 1e-6);

  nodeExit.select("text")
      .style("fill-opacity", 1e-6);

  
  var link = vis.selectAll("path.link")
      .data(tree.links(nodes), function(d) { return d.target.id; });

  
  link.enter().insert("svg:path", "g")
      .attr("class", "link")
      .attr("d", function(d) {
        var o = {x: source.x0, y: source.y0};
        return diagonal({source: o, target: o});
      })
    .transition()
      .duration(duration)
      .attr("d", diagonal);

  
  link.transition()
      .duration(duration)
      .attr("d", diagonal);

  
  link.exit().transition()
      .duration(duration)
      .attr("d", function(d) {
        var o = {x: source.x, y: source.y};
        return diagonal({source: o, target: o});
      })
      .remove();

  
  nodes.forEach(function(d) {
    d.x0 = d.x;
    d.y0 = d.y;
  });
}


function toggle(d) {
  if (d.children) {
    d._children = d.children;
    d.children = null;
  } else {
    d.children = d._children;
    d._children = null;
  }
}