if GetBot():IsInvulnerable() or not GetBot():IsHero() or not string.find(GetBot():GetUnitName(), "hero") or  GetBot():IsIllusion() then
	return;
end

local ability_item_usage_generic = dofile( GetScriptDirectory().."/ability_item_usage_generic" )
local utils = require(GetScriptDirectory() ..  "/util")
local mutils = require(GetScriptDirectory() ..  "/MyUtility")
local abUtils = require(GetScriptDirectory() ..  "/AbilityItemUsageUtility")

function AbilityLevelUpThink()  
	ability_item_usage_generic.AbilityLevelUpThink(); 
end
function BuybackUsageThink()
	ability_item_usage_generic.BuybackUsageThink();
end
function CourierUsageThink()
	ability_item_usage_generic.CourierUsageThink();
end
function ItemUsageThink()
	ability_item_usage_generic.ItemUsageThink();
end

local bot = GetBot();

local abilities = {};

local castCombo1Desire = 0;
local castCombo2Desire = 0;
local castQDesire = 0;
local castWDesire = 0;
local castEDesire = 0;
local castRDesire = 0;

local lastCheck = -90;
local castSwapTime = DotaTime();
local ancient = GetAncient(GetTeam());
local eancient = GetAncient(GetOpposingTeam());
local castSwapForSaveCheck = DotaTime();
local castSwapForChanelling = DotaTime();

function AbilityUsageThink()
	
	if #abilities == 0 then abilities = mutils.InitiateAbilities(bot, {0,1,2,5}) end
	
	if mutils.CantUseAbility(bot) then return end
	
	castQDesire, targetQ = ConsiderQ();
	castWDesire, targetW = ConsiderW();
	-- castEDesire, targetE  = ConsiderE();
	castRDesire, targetR = ConsiderR();
	
	if castQDesire > 0 then
		bot:Action_UseAbilityOnLocation(abilities[1], targetQ);		
		return
	end
	
	if castWDesire > 0 then
		bot:Action_UseAbilityOnLocation(abilities[2], targetW);		
		return
	end
	
	if castRDesire > 0 then
		castSwapTime = DotaTime();
		bot:Action_UseAbilityOnEntity(abilities[4], targetR);		
		return
	end
	
	if castEDesire > 0 then
		bot:Action_UseAbilityOnEntity( abilities[3], targetE );
		return
	end
	
end

function ConsiderQ()
	if not mutils.CanBeCast(abilities[1]) then
		return BOT_ACTION_DESIRE_NONE, nil;
	end
	
	local nCastRange = mutils.GetProperCastRange(false, bot, abilities[1]:GetCastRange());
	local nCastPoint = abilities[1]:GetCastPoint();
	local manaCost  = abilities[1]:GetManaCost();
	local nRadius   = abilities[1]:GetSpecialValueInt( "dragon_slave_width_end" );
	
	
	if mutils.IsRetreating(bot) and bot:WasRecentlyDamagedByAnyHero(2.0)
	then
		local target = mutils.GetVulnerableWeakestUnit(true, true, nCastRange, bot);
		if target ~= nil then
			return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
		end
	end
	
	if ( mutils.IsPushing(bot) or mutils.IsDefending(bot) ) and mutils.CanSpamSpell(bot, manaCost)
	then
		local locationAoE = bot:FindAoELocation( true, false, bot:GetLocation(), nCastRange, nRadius, 0, 0 );
		if ( locationAoE.count >= 3 ) then
			local target = mutils.GetVulnerableUnitNearLoc(false, true, nCastRange, nRadius, locationAoE.targetloc, bot);
			if target ~= nil then
				return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
			end
		end
	end
	
	if mutils.IsInTeamFight(bot, 1300)
	then
		local locationAoE = bot:FindAoELocation( true, true, bot:GetLocation(), nCastRange, nRadius, nCastPoint, 0 );
		if ( locationAoE.count >= 2 ) then
			local target = mutils.GetVulnerableUnitNearLoc(true, true, nCastRange, nRadius, locationAoE.targetloc, bot);
			if target ~= nil then
				return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
			end
		end
	end
	
	if ( bot:GetActiveMode() == BOT_MODE_ROSHAN and mutils.CanSpamSpell(bot, manaCost)  ) 
	then
		local npcTarget = bot:GetAttackTarget();
		if ( mutils.IsRoshan(npcTarget) and mutils.CanCastOnMagicImmune(npcTarget) and mutils.IsInRange(npcTarget, bot, nCastRange) 
            and not mutils.IsDisabled(true, npcTarget) )
		then
			return BOT_ACTION_DESIRE_LOW, npcTarget:GetLocation();
		end
	end
	
	
	if mutils.IsGoingOnSomeone(bot)
	then
		local target = bot:GetTarget();
		if mutils.IsValidTarget(target) and mutils.CanCastOnNonMagicImmune(target) and mutils.IsInRange(target, bot, nCastRange+200) and not mutils.IsDisabled(true, target)
		then
			return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
		end
	end
	
	return BOT_ACTION_DESIRE_NONE, nil;
end

function ConsiderW()
	if not mutils.CanBeCast(abilities[2]) then
		return BOT_ACTION_DESIRE_NONE, nil;
	end
	
	local nCastRange = mutils.GetProperCastRange(false, bot, abilities[2]:GetCastRange());
	local nCastPoint = abilities[2]:GetCastPoint();
	local manaCost  = abilities[2]:GetManaCost();
	local nRadius   = abilities[2]:GetSpecialValueInt( "light_strike_array_aoe" );
	local nDelay   = abilities[2]:GetSpecialValueInt( "light_strike_array_delay_time" );
	
	if mutils.IsRetreating(bot) and bot:WasRecentlyDamagedByAnyHero(3.0)
	then
		local locationAoE = bot:FindAoELocation( true, true, bot:GetLocation(), nCastRange, nRadius, nCastPoint, 0 );
		if ( locationAoE.count >= 2 ) then
			local target = mutils.GetVulnerableUnitNearLoc(true, true, nCastRange, nRadius, locationAoE.targetloc, bot);
			if target ~= nil then
				return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
			end
		end
		local target = mutils.GetVulnerableWeakestUnit(true, true, nCastRange, bot);
		if target ~= nil then
			return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
		end
	end
	
	if mutils.IsInTeamFight(bot, 1300)
	then
		local locationAoE = bot:FindAoELocation( true, true, bot:GetLocation(), nCastRange, nRadius, nCastPoint, 0 );
		if ( locationAoE.count >= 2 ) then
			local target = mutils.GetVulnerableUnitNearLoc(true, true, nCastRange, nRadius, locationAoE.targetloc, bot);
			if target ~= nil then
				return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
			end
		end
	end
	
	if ( bot:GetActiveMode() == BOT_MODE_ROSHAN and mutils.CanSpamSpell(bot, manaCost)  ) 
	then
		local npcTarget = bot:GetAttackTarget();
		if ( mutils.IsRoshan(npcTarget) and mutils.CanCastOnMagicImmune(npcTarget) and mutils.IsInRange(npcTarget, bot, nCastRange) 
            and not mutils.IsDisabled(true, npcTarget) )
		then
			return BOT_ACTION_DESIRE_LOW, npcTarget:GetLocation();
		end
	end
	
	if ( mutils.IsPushing(bot) or mutils.IsDefending(bot) ) and mutils.CanSpamSpell(bot, manaCost)
	then
		local locationAoE = bot:FindAoELocation( true, false, bot:GetLocation(), nCastRange, nRadius, 0, 0 );
		if ( locationAoE.count >= 3 ) then
			local target = mutils.GetVulnerableUnitNearLoc(false, true, nCastRange, nRadius, locationAoE.targetloc, bot);
			if target ~= nil then
				return BOT_ACTION_DESIRE_HIGH, target:GetLocation();
			end
		end
	end
	
	if mutils.IsGoingOnSomeone(bot)
	then
		local target = bot:GetTarget();
		if mutils.IsValidTarget(target) and mutils.CanCastOnNonMagicImmune(target) and mutils.IsInRange(target, bot, bot:GetAttackRange()+100) and not mutils.IsDisabled(true, target)
		then
			local moveCon = target:GetMovementDirectionStability();
			local pLoc = target:GetExtrapolatedLocation( nCastPoint + nDelay );
			-- if moveCon < 1 then
				-- pLoc = target:GetLocation();
			-- end
			return BOT_ACTION_DESIRE_HIGH, pLoc;
		end
	end
	
	return BOT_ACTION_DESIRE_NONE, nil;
end	

function ConsiderE()
	if not mutils.CanBeCast(abilities[3]) 
	then
		return BOT_ACTION_DESIRE_NONE, nil;
	end
	
	return BOT_ACTION_DESIRE_NONE, 0;
end		

function ConsiderR()
	if not mutils.CanBeCast(abilities[4]) then
		return BOT_ACTION_DESIRE_NONE, nil;
	end
	
	local nCastRange = mutils.GetProperCastRange(false, bot, abilities[4]:GetCastRange());
	local nCastPoint = abilities[4]:GetCastPoint();
	local manaCost  = abilities[4]:GetManaCost();
	
	if mutils.IsRetreating(bot) and bot:WasRecentlyDamagedByAnyHero(2.0)
	then
		local target = mutils.GetVulnerableWeakestUnit(true, true, nCastRange, bot);
		if target ~= nil then
			return BOT_ACTION_DESIRE_HIGH, target;
		end
	end
	
	if mutils.IsInTeamFight(bot, 1300)
	then
		local target = mutils.GetStrongestUnit(nCastRange, bot, true, false, 5.0);
		if target ~= nil then
			return BOT_ACTION_DESIRE_HIGH, target;
		end
	end
	
	if mutils.IsGoingOnSomeone(bot)
	then
		local target = bot:GetTarget();
		if mutils.IsValidTarget(target) and mutils.CanCastOnNonMagicImmune(target) and mutils.IsInRange(target, bot, nCastRange+200) 
			and target:HasModifier('modifier_templar_assassin_refraction_absorb') == false
		then
			return BOT_ACTION_DESIRE_HIGH, target;
		end
	end
	
	return BOT_ACTION_DESIRE_NONE, nil;
end
	