--[[

	The MIT License (MIT)

	Copyright (c) 2024 Lars Norberg

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.

--]]
local _, ns = ...
local API = ns.API or {}
ns.API = API

-- GLOBALS: UnitIsConnected, UnitIsDeadOrGhost, UnitIsPlayer, UnitIsTapDenied
-- GLOBALS: UnitClass, UnitReaction, UnitCanAttack, UnitPlayerControlled
-- GLOBALS: UnitLevel, UnitEffectiveLevel, UnitQuestTrivialLevelRange, UnitQuestTrivialLevelRangeScaling
-- GLOBALS: GetScalingQuestGreenRange, GetQuestGreenRange

local Colors = ns.Colors

-- Retrieve a unit's color
local GetUnitColor = function(unit)
	local color
	if (unit and UnitExists(unit)) then
		if ((not UnitPlayerControlled(unit)) and UnitIsTapDenied(unit) and UnitCanAttack("player", unit)) then
			color = Colors.tapped
		elseif (not UnitIsConnected(unit)) then
			color = Colors.disconnected
		elseif (UnitIsDeadOrGhost(unit)) then
			color = Colors.dead
		elseif (UnitIsPlayer(unit)) then
			local _, class = UnitClass(unit)
			if class then
				color = Colors.class[class]
			else
				color = Colors.disconnected
			end
		else
			local reaction = UnitReaction(unit, "player")
			if (reaction) then
				color = Colors.reaction[reaction]
			else
				color = Colors.offwhite
			end
		end
	end
	return color
end

-- Unit difficulty coloring.
local GetDifficultyColor = function(level, isScaling)
	local colors = Colors.quest
	if (isScaling) then
		local levelDiff = level - UnitEffectiveLevel("player")
		if (levelDiff > 5) then
			return colors.red[1], colors.red[2], colors.red[3], colors.red.colorCode
		elseif (levelDiff > 3) then
			return colors.orange[1], colors.orange[2], colors.orange[3], colors.orange.colorCode
		elseif (levelDiff >= 0) then
			return colors.yellow[1], colors.yellow[2], colors.yellow[3], colors.yellow.colorCode
		elseif (-levelDiff <= -UnitQuestTrivialLevelRangeScaling("player")) then
			return colors.green[1], colors.green[2], colors.green[3], colors.green.colorCode
		else
			return colors.gray[1], colors.gray[2], colors.gray[3], colors.gray.colorCode
		end
	else
		local levelDiff = level - UnitLevel("player")
		if (levelDiff > 5) then
			return colors.red[1], colors.red[2], colors.red[3], colors.red.colorCode
		elseif (levelDiff > 3) then
			return colors.orange[1], colors.orange[2], colors.orange[3], colors.orange.colorCode
		elseif (levelDiff >= -4) then
			return colors.yellow[1], colors.yellow[2], colors.yellow[3], colors.yellow.colorCode
		elseif (-levelDiff <= -UnitQuestTrivialLevelRange("player")) then
			return colors.green[1], colors.green[2], colors.green[3], colors.green.colorCode
		else
			return colors.gray[1], colors.gray[2], colors.gray[3], colors.gray.colorCode
		end
	end
end

-- CATA: check this
if (ns.IsClassic or ns.IsCata) then
	GetDifficultyColor = function(level, isScaling)
		local colors = Colors.quest
		local levelDiff = level - UnitLevel("player")
		if (isScaling) then
			if (levelDiff > 5) then
				return colors.red[1], colors.red[2], colors.red[3], colors.red.colorCode
			elseif (levelDiff > 3) then
				return colors.orange[1], colors.orange[2], colors.orange[3], colors.orange.colorCode
			elseif (levelDiff >= 0) then
				return colors.yellow[1], colors.yellow[2], colors.yellow[3], colors.yellow.colorCode
			elseif (-levelDiff <= GetScalingQuestGreenRange()) then
				return colors.green[1], colors.green[2], colors.green[3], colors.green.colorCode
			else
				return colors.gray[1], colors.gray[2], colors.gray[3], colors.gray.colorCode
			end
		else
			if (levelDiff > 5) then
				return colors.red[1], colors.red[2], colors.red[3], colors.red.colorCode
			elseif (levelDiff > 3) then
				return colors.orange[1], colors.orange[2], colors.orange[3], colors.orange.colorCode
			elseif (levelDiff >= -2) then
				return colors.yellow[1], colors.yellow[2], colors.yellow[3], colors.yellow.colorCode
			elseif (-levelDiff <= GetQuestGreenRange()) then
				return colors.green[1], colors.green[2], colors.green[3], colors.green.colorCode
			else
				return colors.gray[1], colors.gray[2], colors.gray[3], colors.gray.colorCode
			end
		end
	end
end

-- Global API
---------------------------------------------------------
API.GetUnitColor = GetUnitColor
API.GetDifficultyColorByLevel = GetDifficultyColor
