// Computes the distances between 2 tokens on the active player page
// Assumes each square grid is 70 pixels, scaling is used to calculate hex grid maps.
// Script command
// !range @{target|1st Target|token_id},@{target|2nd Target|token_id}
// Set useHeight = true to use Bar2 to calculate range including height difference between targets (bar2 is units of page scale eg. 5ft.) false to ignore height.
// Height calculation currently assumes a medium sized creature (1 unit, eg. 5ft) so a target with 1 unit (5 ft) elevation in an adjacent square is 1 unit away.

on("chat:message", function(msg) {
    if(msg.type == "api" && msg.content.indexOf("!range") != -1)
    {
        var useHeight = true; // true = use Target height difference, false to ignore height

        if (msg.content.indexOf("!range ") != -1)
        {
            var m = msg.content;
            m = m.replace("!range ","");
            var l = m.length;

            var p = m.indexOf(",");
            tokenid1 = m.substring(0,p);
            tokenid2 = m.substring(p+1,l);
        }

        var curPageID = findObjs({_type: "campaign"})[0].get("playerpageid");
        var curPage = findObjs({_type: "page", _id: curPageID})[0]; //var currentPage = getObj("page", Campaign().get("playerpageid"));
        var curScale = curPage.get("scale_number"); // scale for 1 unit, eg. 1 unit = 5ft
		var curUnit = curPage.get("scale_units"); // ft, m, km, mi etc.
		var curDiagonalType = curPage.get("diagonaltype"); // One of "foure", "pythagorean" (Euclidean), "threefive", or "manhattan"
		var curGridType = curPage.get("grid_type"); // One of "square", "hex", or "hexr". (hex corresponds to Hex(V), and hexr corresponds to Hex(H))
		var gridSize = 70;

        var token1 =  findObjs({_type: "graphic", layer:"objects", _pageid: curPageID, _id: tokenid1})[0];
        var token2 =  findObjs({_type: "graphic", layer:"objects", _pageid: curPageID, _id: tokenid2})[0];
        var name1 =  token1.get("name");
        var name2 =  token2.get("name");

        if (token1 && token2)
        {
            // DnD 4.0 Distance Calculation
			if (curDiagonalType == "foure" && curGridType == "square")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"))/gridSize;
            var tDist = Math.abs(token1.get("top")-token2.get("top"))/gridSize;
            var zDist = Math.abs((token1.get("bar2_value")-token2.get("bar2_value"))/curScale);//gridSize;
            var t1Height = token1.get("height");// to use for token size variation in the fiture
			if (zDist >= 1)
				{
				zDist = zDist - 1;// based on medium size tokens reduce effective height difference by 1 unit as token is a cube
				}
			if (useHeight != true) zDist = 0;
			var dist = 0;
			dist = Math.floor(Math.max(Math.min(lDist, tDist) + Math.abs(lDist - tDist), zDist));
			//dist = Math.floor(Math.min(lDist, tDist) + Math.abs(lDist - tDist));
			var distSQ = dist;
			dist = dist * curScale;
			var finalMessage = ("Distance between "+name1+" and "+name2+" = (" +distSQ+") "+dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }

            // DnD 3.5 / Pathfinder Distance Calculation
			if (curDiagonalType == "threefive" && curGridType == "square")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"));
            var tDist = Math.abs(token1.get("top")-token2.get("top"));
            var zDist = Math.abs((token1.get("bar2_value")-token2.get("bar2_value"))/curScale)*gridSize;
            var t1Height = token1.get("height");// to use for token size variation in the fiture
			if (zDist >= 70)
				{
				zDist = zDist - 70;// based on medium size tokens reduce effective height difference by 1 unit as token is a cube
				}
			if (useHeight != true) zDist = 0;
            var dist = 0;
			dist = Math.floor(1.5 * Math.min(lDist, tDist) + Math.abs(lDist - tDist));
			zDist = 1.118033988749895 * zDist;//scaling factor for height calculation
			dist = Math.sqrt(dist * dist + zDist * zDist);
			dist = dist * curScale / gridSize;
			dist = curScale * (Math.round(dist / curScale));// rounds to nearest scale unit eg. 5 ft.
			var finalMessage = ("Distance between "+name1+" and "+name2+" = " +dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }

            // Euclidean Distance Calculation
			if (curDiagonalType == "pythagorean" && curGridType == "square")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"))/gridSize;
            var tDist = Math.abs(token1.get("top")-token2.get("top"))/gridSize;
            var zDist = Math.abs((token1.get("bar2_value")-token2.get("bar2_value"))/curScale);//gridSize;
            var dist = 0;
			//dist = Math.sqrt(lDist * lDist + tDist * tDist);
			dist = Math.sqrt(lDist * lDist + tDist * tDist + zDist * zDist);
			var distSQ = dist;
			dist = dist * curScale;
			dist = Math.round(dist * 10) / 10;
			var finalMessage = ("Distance between "+name1+" and "+name2+" = " +dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }

            // Manhattan Distance Calculation
			if (curDiagonalType == "manhattan" && curGridType == "square")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"))/gridSize;
            var tDist = Math.abs(token1.get("top")-token2.get("top"))/gridSize;
            var dist = 0;
			dist = Math.round(lDist + tDist);
			var distSQ = dist;
			dist = dist * curScale;
			var finalMessage = ("Distance between "+name1+" and "+name2+" = (" +distSQ+") "+dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }

            // Hex(V) Distance Calculation - Including distance between "Is Drawing" objects to 3 decimal places
			if (curGridType == "hex")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"));
            var tDist = Math.abs(token1.get("top")-token2.get("top"));
            var dist = 0;
			lDist = lDist / 75.19856198446026; // Hex Scaling Factor
			tDist = tDist / 66.96582782426833; // Hex Scaling Factor
			dist = 1.5 * Math.min(lDist, tDist) + Math.abs(lDist - tDist);
			dist = Math.round(dist * curScale * 1000) / 1000; // Decimal point accuracy limit
			var finalMessage = ("Distance between "+name1+" and "+name2+" = " +dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }

            // Hex(H) Distance Calculation - Including distance between "Is Drawing" objects to 3 decimal places
			if (curGridType == "hexr")
			{
			var lDist = Math.abs(token1.get("left")-token2.get("left"));
            var tDist = Math.abs(token1.get("top")-token2.get("top"));
            var dist = 0;
			lDist = lDist / 69.58512749037783; // Hex Scaling Factor
			tDist = tDist / 79.68878998350463; // Hex Scaling Factor
			dist = 1.5 * Math.min(lDist, tDist) + Math.abs(lDist - tDist);
			dist = Math.round(dist * curScale * 1000) / 1000; // Decimal point accuracy limit
			// var finalMessage = ("Distance between "+name1+" and "+name2+" = " +dist+" "+curUnit+" left "+lDist+" top "+tDist);
			var finalMessage = ("Distance between "+name1+" and "+name2+" = " +dist+" "+curUnit);
			sendChat("RangeFinder",'<div style="padding:1px 3px;border: 1px solid #8B4513;background: #eeffee; color: #8B4513; font-size: 80%;">'+finalMessage+'</div>');
            }
        }
        else
        {
            if (!token1)
            {
                sendChat("","Token not found "+ name1 );

            }
            if (!token2)
            {
                sendChat("","Token not found "+ name2 );

            }
        }
    }


});