/**
This Javascript was developed by Ephibian Inc and can only be used if given explicit
permission by Ephibian Inc.

Author: aavery@ephibian.com
www.ephibian.com
**/

function TableGenerator(data, id, opts){
  this.headerRow = data[0].row;
  this.data = data.slice(1, data.length);
  this.id = id;
  this.position = 0;
  this.currentSort = 0;
  this.currentSortType = 1; //Defaults to Asc
  
  if(opts){
    this.opts = opts;
  }else{
	this.opts = new Object();
  }
  
  // Initialize the options.
  if(!this.opts.cellpadding){
    this.opts.cellpadding  = '0';
  }
  if(!this.opts.cellspacing){
    this.opts.cellspacing  = '0';
  }
  if(!this.opts.border){
    this.opts.border       = '0';
  }
  if(!this.opts.width){
    this.opts.width        = '0';
  }
  if(!this.opts.rowsPerPage){
    this.opts.rowsPerPage  = '0';
  }
  if(!this.opts.mainClass){
    this.opts.mainClass    = '';
  }
  if(!this.opts.oddClass){
    this.opts.oddClass     = '';
  }
  if(!this.opts.evenClass){
    this.opts.evenClass    = '';
  }
  if(!this.opts.headingClass){
    this.opts.headingClass = '';
  }
}

function renderHtml(table, direction){
  var data = table.data;
  var html = "";

  var tableStart = "<table ";
  tableStart += "cellpadding='"+table.opts.cellpadding+"' ";
  tableStart += "cellspacing='"+table.opts.cellspacing+"' ";
  tableStart += "border='"+table.opts.border+"' ";
  if(table.opts.mainClass){
    tableStart += "class='"+table.opts.mainClass+"'";
  }
  tableStart += ">";
  html += tableStart;
  
  var start,end = 0;
  if(direction == "next"){
    table.position += table.opts.rowsPerPage;
  }else if(direction == "prev"){
    table.position -= table.opts.rowsPerPage;
  }
  if(table.opts.rowsPerPage > 0){
    start = table.position;
    end   = table.position + table.opts.rowsPerPage;
    if(end > data.length){
      end = data.length;
    }
  }else{
    start = 0;
    end   = data.length;
  }

  if(table.headerRow){
    html += "<tr class='" + table.opts.headingClass + "'>";
    for(var i=0; i < table.headerRow.length; ++i){

	  if(table.currentSort == i){
		var image = "";
		if(table.currentSortType > 0){
		  html += "<td nowrap><a href=\"javascript: table.sortByColumnDesc('" + i + "');\">" + table.headerRow[i];
		  image = table.opts.sortArrowUp;
		}else{
	      html += "<td nowrap><a href=\"javascript: table.sortByColumnAsc('" + i + "');\">" + table.headerRow[i];
		  image = table.opts.sortArrowDown;
		}
	    html += " <img src='" + image + "' border='0'>";
	  }else{
		html += "<td nowrap><a href=\"javascript: table.sortByColumnAsc('" + i + "');\">" + table.headerRow[i];
	  }
	  html += "</a></td>";
    }
    html += "</tr>";
	if(table.displayFilters){
	  html += "<tr>";
      var filts = new Array(table.headerRow.length);
      for(var i=0; i<table.data.length; ++i){
        var row = table.data[i].row;
	    for(var j=0; j<table.headerRow.length; ++j){
		  if(contains(table.filterColumns, j)){
	        if(!filts[j]){
	          filts[j] = new Array();
	        }
		    if(!contains(filts[j], row[j])){
	          filts[j].push(row[j]);
		    }
		  }else{
		    filts[j] = null;
		  }
	    }
      }

	  for(var k=0; k < table.headerRow.length; ++k){
          html += "<td class='" + table.opts.filterClass + "'>";
		  if(filts[k]){
		    html += "<select multiple size='4'><option selected>All</option>";
		    filts[k].sort();
	        for(var j=0; j<filts[k].length; ++j){
	          html += "<option>" + filts[k][j] + "</option>";
	        }
		    html += "</select>";
		  }else{
		    html += "&nbsp;";
		  }
		
	      html += "</td>";  
	  }
	
      html += "</tr>";
	}
  }

  // Always display the first row.
  var oldstart = start;
  for(var i = start ; i < end ; i++){
    var row = data[i].row;
    var rowStart = "<tr ";
    if(table.opts.evenClass && table.opts.oddClass){
      if(i % 2 == 0){
        rowStart += "class='"+table.opts.evenClass+"'";
      }else{
        rowStart += "class='"+table.opts.oddClass+"'";
      }
    }
    rowStart += ">";
    html += rowStart;
    for(var j = 0 ; j < row.length ; j++){
      var cellStart = "<td ";
	  if(data[i]["cell"+ j +"Class"]){
	    cellStart += "class='" + data[i]["cell" + j + "Class"] + "'";
	  }
      cellStart += ">";
      var cellEnd   = "</td>";
      html += cellStart + row[j] + cellEnd;
    }
    var rowEnd = "</tr>";
    html += rowEnd;
    if(i == 0){
      i = oldstart;
    }
  }
//  position = end + 1;

  var tableEnd = "</table>";
  html += tableEnd;
  return html;
}

TableGenerator.prototype.setFilterColumns = function(filtColumns){
  this.filterColumns = filtColumns;
}

TableGenerator.prototype.checkFilter = function(row){
  // If an unmatched item in row is found return false, otherwise return true.
  
}

TableGenerator.prototype.toggleFilters = function(){
  if(this.displayFilters){
    this.displayFilters = false;
  }else{
	this.displayFilters = true;
  }
  this.display();
}

TableGenerator.prototype.display = function(direction){
  var html = renderHtml(this, direction);
  var max = this.position + this.opts.rowsPerPage;
  if(max > this.data.length - 1 ){
    max = this.data.length;
  }
  html = (this.position + 1) + " - " 
        + max + " of " + (this.data.length) + ".<br>" + html;

  document.getElementById(this.id).innerHTML = html;
  if(document.getElementById(this.id + "next")){
    if(this.position < 1){
      document.getElementById(this.id + "prev").disabled = true;
    }else{
      document.getElementById(this.id + "prev").disabled = false;
    }

    if(this.position + this.opts.rowsPerPage > this.data.length - 1){
      document.getElementById(this.id + "next").disabled = true;
    }else{
      document.getElementById(this.id + "next").disabled = false;
    }
  }
  this.currentSortType = -1;
}

function contains(list, val){
  if(list){
    for(var i=0; i<list.length; ++i){
      if(list[i].toString() == val.toString()){
	    return true;
	  }
    }
  }
  return false;
}

TableGenerator.prototype.sortByColumnAsc = function(i){
  if((this.data.length > 0) && (this.data[0].row.length > 0)){
    if(typeof this.data[0].row[i] == "string"){
      this.data.sort(function(a,b){
        if(a.row[i] > b.row[i]){
	      return 1;
	    }else if (a.row[i] < b.row[i]){
	      return -1;
	    }else{
	      return 0;
  	    }
      });
	}else{
	  this.data.sort(function(a,b){
	    return a.row[i]-b.row[i];
	  });
	}
	this.currentSort = i;
	this.currentSortType = 1;
    this.display();
  }
}

TableGenerator.prototype.sortByColumnDesc = function(i){
  if((this.data.length > 0) && (this.data[0].row.length > 0)){
    if(typeof this.data[0].row[i] == "string"){
      this.data.sort(function(a,b){
        if(a.row[i] < b.row[i]){
	      return 1;
	    }else if (a.row[i] > b.row[i]){
	      return -1;
	    }else{
	      return 0;
  	    }
      });
	}else{
	  this.data.sort(function(a,b){
	    return b.row[i]-a.row[i];
	  });
	}
	this.currentSort = i;
	this.currentSortType = -1;
    this.display();
  }
}

TableGenerator.prototype.setPosition = function(pos){
  this.position = pos;
}