local base, turret, barrel1, firepoint1, dirt = piece('base', 'turret', 'barrel1', 'firepoint1')
local SIG_AIM = {}

-- state variables
isMoving = "isMoving"

function script.Create()

end

function setSFXoccupy(setSFXoccupy_argument)
	local terrainType = setSFXocupy_argument
	if terrainType == 2 then
		Move(base, y_axis, -0.85, 50)
		local upright = true
	else
		Move(base, y_axis, 0, 50)
		local upright = false
	end

	if terrainType == 4 then
		Move(base, y_axis, 0, 50)
		local upright = false
	else
		Move(base, y_axis, -0.85, 50)
		local upright = true
	end
end

function script.StartMoving()
   isMoving = true
end

function script.StopMoving()
   isMoving = false
end

function thrust()
	while isMoving do
		EmitSfx (dirt, 1025)
		Sleep(400)
	end
end


function script.AimWeapon1(heading, pitch)
	Signal(SIG_AIM)
	SetSignalMask(SIG_AIM)
	Turn(turret, y_axis, heading, 25)
	Turn(barrel, x_axis, pitch, 25)
	WaitForTurn(turret, y_axis)
	WaitForTurn(barrel, x_axis)
	StartThread(RestoreAfterDelay)
	return true
end

function script.AimFromWeapon1()
	return turret
end

function script.QueryWeapon1()
	return firepoint1
end

function script.FireWeapon1()

end

local RESTORE_DELAY = 2 * 1000 * Spring.GetUnitWeaponState(unitID, 0, 'reloadTime')

local function RestoreAfterDelay()
	Sleep(RESTORE_DELAY)
	Turn(turret, y_axis, 0, 0.5)
	Turn(barrel, x_axis, 0, 0.25)
end

local random = math.random

function SmokeUnit(smokePieces)
	local n = #smokePieces
	while (GetUnitValue(COB.BUILD_PERCENT_LEFT) ~= 0) do
		Sleep(1000)
	end
	while true do
		local health = GetUnitValue(COB.HEALTH)
		if (health <= 66) then -- only smoke if less then 2/3rd health left
			EmitSfx(smokePieces[random(1,n)], 1026)
		end
		Sleep(20*health + 200)
	end
end

function script.Killed()
		Explode(barrel, SFX.EXPLODE_ON_HIT)
		Explode(turret, SFX.EXPLODE_ON_HIT)
		return 1   -- spawn ARMSTUMP_DEAD corpse / This is the equivalent of corpsetype = 1; in bos
end