----------------------------------------------------------------------------------------------------
--
-- All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
-- its licensors.
--
-- For complete copyright and license terms please see the LICENSE at the root of this
-- distribution (the "License"). All use of this software is governed by the License,
-- or, if provided, by the license below or the license accompanying this file. Do not
-- remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
--
--  Description: Comment system.
--
----------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------
--  $Id$
--  $DateTime$
--  Description: Comment system.
--
----------------------------------------------------------------------------------------------------

Comment =
{
	Properties =
	{
		Text = "This is a comment",
		fSize = 1.2,	--[0.0, 100.0 , 0.1, ""]
		bHidden = 0,
		fMaxDist = 100,	--[0.0 ,255.0 , 0.1, ""]
		nCharsPerLine = 30,	--[1, 255, 1, ""]
		bFixed = 0,
		clrDiffuse = { x=1,y=0.5,z=0 },
	},

	Editor={
		Model="Editor/Objects/comment.cgf",
		Icon="Comment.bmp",
	},
	
	hidden = 0,
	lines = {},
	lineCount = 0,
	fMaxDistSquared = 0,
	bNoUpdateInGame = 1,
}


-------------------------------------------------------
function Comment:OnLoad(table)
  self.hidden = table.hidden;  
end

-------------------------------------------------------
function Comment:OnSave(table)
  table.hidden = self.hidden;
end

-------------------------------------------------------
function Comment:OnInit()	
	-- Delete when not in dev-mode.
	if (not System.IsDevModeEnable() ) then
		self:DeleteThis();
		return;
	end

	self:OnReset();
end

-------------------------------------------------------
function Comment:OnSpawn()
end

-------------------------------------------------------
function Comment:OnPropertyChange()
	self:OnReset();
end

-------------------------------------------------------
function Comment:OnReset()
	-- Comment is only Active(OnUpdate() will be called) when in Editor or when cl_comment > 0
	local cl_comment = System.GetCVar("cl_comment")
	if (System.IsEditor() or cl_comment > 0) then
		self:SetUpdatePolicy( ENTITY_UPDATE_VISIBLE );
		self:Activate(1)
	else
		self:Activate(0);
	end

	-- bNoUpdateInGame is checked in OnUpdate() to account for in-editor game mode.
	if (cl_comment == 0) then
		self.bNoUpdateInGame = 1;
	else
		self.bNoUpdateInGame = 0;
	end

	self.fMaxDistSquared = self.Properties.fMaxDist * self.Properties.fMaxDist;

	self.hidden = self.Properties.bHidden;
	self.lines = {};
	
	-- process the text and line-break it
	local maxLength = self.Properties.nCharsPerLine;
	local curLength = 0;
	local curText = "";
	local curLine = 1;
	
	for char in string.gfind(self.Properties.Text, ".") do
		if (char == " ") then
			-- word finished ... see if we are over the limit
			if (curLength > maxLength) then
				-- commit line
				self.lines[curLine] = curText;
				curLine = curLine + 1;
				curText = "";
				curLength = 0;
				-- "consume" the whitespace
				char = "";
			end
		end
		if (char ~= "") then
			-- append char
			curText = curText..char;
			curLength = curLength + 1;
		end
	end
	
	self.lines[curLine] = curText;
	self.lineCount = curLine;

	self:OnUpdate(0);
end

-------------------------------------------------------
function Comment:OnUpdate(delta)
	if (self.hidden ~= 0 or self:IsHidden() or self.Properties.Text =="" or (self.bNoUpdateInGame == 1 and not System.IsEditing())) then
		return;
	end

	-- calculate alpha
	local alpha = 0;
	local factor = 0;

	if (self.fMaxDistSquared>0) then
		local mypos = g_Vectors.temp_v1;

		self:GetWorldPos(mypos);
		SubVectors(mypos, mypos, System.GetViewCameraPos());

		local distSquared = LengthSqVector(mypos);
		factor = distSquared;

		if (self.Properties.fMaxDist >= 255.0) then
			alpha = 1.0;
		elseif (distSquared<self.fMaxDistSquared) then
			alpha = distSquared/self.fMaxDistSquared;
			alpha = 1.0 - alpha*alpha;
		end
	end
	
	-- draw text
	local increment = System.GetViewCameraUpDir();
	
	if (alpha>0.001) then
		local pos = self:GetWorldPos( g_Vectors.temp_v1 );
		
		factor = math.sqrt(factor);
		factor = (self.Properties.fSize/60) * factor * System.GetViewCameraFov();	
		
		local incrementAll = g_Vectors.temp_v4;
		FastScaleVector(increment, increment, factor);
		FastScaleVector(incrementAll, increment, (self.lineCount / 2 + 1));
		
		-- start all the way at the top
		FastSumVectors(pos, pos, incrementAll);
		
		local textColor = { x=0, y=1, z=0 };	-- default color is for (bFixed == 1)
		if (self.Properties.bFixed ~= 1) then
			textColor = {x=self.Properties.clrDiffuse.x, y=self.Properties.clrDiffuse.y, z=self.Properties.clrDiffuse.z};
		end
		
		for i,val in ipairs(self.lines) do
			System.DrawLabel( pos, self.Properties.fSize, val, textColor.x, textColor.y, textColor.z, alpha );
			-- decrement the increment
			FastDifferenceVectors(pos, pos, increment);
		end
	end
end

-------------------------------------------------------
function Comment:Event_UnHide(sender)	
	BroadcastEvent(self, "UnHide");
	self.hidden = 0;
end

-------------------------------------------------------
function Comment:Event_Hide(sender)	
	BroadcastEvent(self, "Hide");
	self.hidden = 1;
end

-------------------------------------------------------
Comment.FlowEvents =
{
	Inputs =
	{
		Hide = { Comment.Event_Hide, "bool" },
		UnHide = { Comment.Event_UnHide, "bool" },
	},
	Outputs =
	{
		Hide = "bool",
		UnHide = "bool",
	},
}