--[[
   Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
   This file is part of OpenRA, which is free software. It is made
   available to you under the terms of the GNU General Public License
   as published by the Free Software Foundation, either version 3 of
   the License, or (at your option) any later version. For more
   information, see COPYING.
]]
IdleHunt = function(unit) if not unit.IsDead then Trigger.OnIdle(unit, unit.Hunt) end end

IdlingUnits = function()
	local lazyUnits = Greece.GetGroundAttackers()

	Utils.Do(lazyUnits, function(unit)
		Trigger.OnDamaged(unit, function()
			Trigger.ClearAll(unit)
			Trigger.AfterDelay(0, function() IdleHunt(unit) end)
		end)
	end)
end

BaseBarracks =       { type = "tent", pos = CVec.New(-9, 6), cost = 400, exists = true }
BaseProc =           { type = "proc", pos = CVec.New(4, 7), cost = 1400, exists = true }
BaseWeaponsFactory = { type = "weap", pos = CVec.New(8, -1), cost = 2000, exists = true }
BaseBuildings =
{
	{ type = "powr", pos = CVec.New(0, 4), cost = 300 },
	BaseBarracks,
	BaseProc,
	BaseWeaponsFactory
}

BuildBase = function()
	for i,v in ipairs(BaseBuildings) do
		if not v.exists then
			BuildBuilding(v)
			return
		end
	end

	Trigger.AfterDelay(DateTime.Seconds(10), BuildBase)
end

BuildBuilding = function(building)
	Trigger.AfterDelay(Actor.BuildTime(building.type), function()
		if CYard.IsDead or CYard.Owner ~= Greece then
			return
		elseif Harvester.IsDead and Greece.Resources <= 299 then
			return
		end

		local actor = Actor.Create(building.type, true, { Owner = Greece, Location = GreeceCYard.Location + building.pos })
		Greece.Cash = Greece.Cash - building.cost

		building.exists = true
		Trigger.OnKilled(actor, function() building.exists = false end)
		Trigger.OnDamaged(actor, function(building)
			if building.Owner == Greece and building.Health < building.MaxHealth * 3/4 then
				building.StartBuildingRepairs()
			end
		end)

		Trigger.AfterDelay(DateTime.Seconds(10), BuildBase)
	end)
end

ProduceInfantry = function()
	if not BaseBarracks.exists then
		return
	elseif Harvester.IsDead and Greece.Resources <= 299 then
		return
	end

	local delay = Utils.RandomInteger(DateTime.Seconds(3), DateTime.Seconds(9))
	local toBuild = { Utils.Random(AlliedInfantryTypes) }
	local Path = Utils.Random(AttackPaths)
	Greece.Build(toBuild, function(unit)
		InfAttack[#InfAttack + 1] = unit[1]

		if #InfAttack >= 10 then
			SendUnits(InfAttack, Path)
			InfAttack = { }
			Trigger.AfterDelay(DateTime.Minutes(2), ProduceInfantry)
		else
			Trigger.AfterDelay(delay, ProduceInfantry)
		end
	end)
end

ProduceArmor = function()
	if not BaseWeaponsFactory.exists then
		return
	elseif Harvester.IsDead and Greece.Resources <= 599 then
		return
	end

	local delay = Utils.RandomInteger(DateTime.Seconds(12), DateTime.Seconds(17))
	local toBuild = { Utils.Random(AlliedArmorTypes) }
	local Path = Utils.Random(AttackPaths)
	Greece.Build(toBuild, function(unit)
		ArmorAttack[#ArmorAttack + 1] = unit[1]

		if #ArmorAttack >= 6 then
			SendUnits(ArmorAttack, Path)
			ArmorAttack = { }
			Trigger.AfterDelay(DateTime.Minutes(3), ProduceArmor)
		else
			Trigger.AfterDelay(delay, ProduceArmor)
		end
	end)
end

SendUnits = function(units, waypoints)
	Utils.Do(units, function(unit)
		if not unit.IsDead then
			Utils.Do(waypoints, function(waypoint)
				unit.AttackMove(waypoint.Location)
			end)
			unit.Hunt()
		end
	end)
end
