-- Arm Medium Tank (Stumpy)
local base, flare, turret = piece ("base", "flare", "turret")

-- constants
local SIG_AIM = 2
local RESTORE_DELAY = Spring.UnitScript.GetLongestReloadTime(unitID) * 2

-- includes
include "rockunit.lua"
include "smokeunit.lua"

function script.Create(unitID)
	Hide(flare)
	StartThread(SmokeUnit)
end

local function RestoreAfterDelay(unitID)
	Sleep(RESTORE_DELAY)
	Turn(turret, y_axis, 0, math.rad(90))
	Turn(barrel, x_axis, 0, math.rad(50))
end

function script.AimWeapon(weaponID, heading, pitch)
	Signal(SIG_AIM)
	SetSignalMask(SIG_AIM)
	Turn(turret, y_axis, heading, math.rad(90))
	Turn(barrel, x_axis, -pitch, math.rad(50))
	WaitForTurn(turret, y_axis)
	WaitForTurn(barrel, x_axis)
	StartThread(RestoreAfterDelay)
	return true
end

function script.FireWeapon(weaponID)
	Show(flare)
	Move(barrel, z_axis, -2.4, 500)
	Sleep(150)
	Hide(flare)
	WaitForMove(barrel, z_axis)
	Move(barrel, z_axis, 0, 3)
end

function script.AimFromWeapon() return turret end

function script.QueryWeapon() return flare end
	
function script.Killed(recentDamage, maxHealth)
	local severity = recentDamage / maxHealth * 100
	Hide(flare)
	if severity <= 25 then
		Explode(barrel, math.bit_or({SFX.BITMAPONLY, SFX.BITMAP1}))
		return 1
	elseif severity <= 50 then
		Explode(barrel, math.bit_or({SFX.FALL, SFX.BITMAP1}))
		return 2
	else
		Explode(barrel, math.bit_or({SFX.FALL, SFX.SMOKE, SFX.FIRE, SFX.EXPLODE_ON_HIT, SFX.BITMAP1}))
		return 3
	end
end