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scope PackBuilding initializer Init //Packs a building into an item !T; !G
                                    //TODO: Beautify
                                    //GLITCHED: heals fully after packing in; Does not provide the item back if cancelled
                                    //GLITCHED: Upon destruction of the item altar flag does not reset
    globals
        private constant integer SPELL_ID = 'MS00'
    endglobals
    
    private struct timerData //Used by the antiblight and animation timers
        unit u
        location l 
    endstruct
    
    private function RemoveBlightUnit takes nothing returns nothing
        //Kills the antiblight unit
        local timerData data = GetTimerData(GetExpiredTimer())
        
        call ReleaseTimer(GetExpiredTimer())
        call RemoveUnit(data.u)
        set data.u = null
        call data.destroy()
    endfunction
    
    private function AnimationTimerFollowup takes timerData data returns nothing
        
        call RemoveUnit(data.u)
        call CreateItem('MI00', GetLocationX(data.l), GetLocationY(data.l))    
        set data.u = null
        set data.l = null
        call data.destroy()
    endfunction
    
    private function Conditions takes nothing returns boolean
        return (GetSpellAbilityId() == SPELL_ID)
    endfunction
    
    private function Actions takes nothing returns nothing
        local unit u = GetTriggerUnit()
        local player p = GetOwningPlayer(u)
        local location l = GetUnitLoc(u)
        local timer t = NewTimer()
        local timerData blightData = timerData.create()
        local timerData animData = timerData.create()
        local unit blight = (CreateUnit(p, 'spu0', GetLocationX(l), GetLocationY(l), 0))
        
        set animData.u = u
        set animData.l = l 
        
        call TriggerSleepAction(0)

        //Remove the building and create an item at it's location.        
        if GetUnitTypeId(u) == 'm000' then
            call SetUnitAnimationReverseFollowed(u, 3, 1, 1, true, FollowUpFunc.AnimationTimerFollowup, animData)
            
        elseif GetUnitTypeId(u) == 'm001' then
            call RemoveUnit(u)
            call CreateItem('MI01', GetLocationX(l), GetLocationY(l))
            
            //Set the IsInItem flag to prevent multiple altars.
            set playerProperties[GetPlayerId(p)].isAhdesAltarInItem = true
            
        elseif GetUnitTypeId(u) == 'm002' then
            call RemoveUnit(u)
            call CreateItem('MI02', GetLocationX(l), GetLocationY(l))
            
        elseif GetUnitTypeId(u) == 'm003' then
            call RemoveUnit(u)
            call CreateItem('MI03', GetLocationX(l), GetLocationY(l))
            
        endif
        
        //This whole thing to wait a second before killing the blight unit
        //Waiting is required for the antiblight to spread
        //I didn't use dispel because of possible cheese with it.
        set blightData.u = blight
        call SetTimerData(t, blightData)
        call TimerStart(t, 1, false, function RemoveBlightUnit)
        
        //Cleanup
        set blightData.u = null
        set animData.u = null
        call blightData.destroy()
        call animData.destroy()
        set blight = null
        set p = null
        set u = null
        set l = null
    endfunction
    
    private function Init takes nothing returns nothing
        local trigger t = CreateTrigger()
        
        call TriggerAddAction(t, function Actions)
        call TriggerAddCondition(t, Condition(function Conditions))
        call TriggerRegisterAnyUnitEventBJ(t, EVENT_PLAYER_UNIT_SPELL_EFFECT)
        
        set t = null
    endfunction

endscope

method onDestroy takes noting returns nothing
if this.u != null then
	set this.u = null
endif
if this.l != null then
	set this.l = null
endif
endmethod