--遮攻カーテン
--Blockout Curtain
--Scripted by AlphaKretin
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--destroy replace yours
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EFFECT_DESTROY_REPLACE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTarget(s.reptg)
	e2:SetValue(s.repval)
	e2:SetOperation(s.repop)
	c:RegisterEffect(e2)
	--destroy replace opps
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e3:SetCode(EFFECT_DESTROY_REPLACE)
	e3:SetRange(LOCATION_GRAVE)
	e3:SetTarget(s.reptg2)
	e3:SetValue(s.repval2)
	e3:SetOperation(s.repop2)
	c:RegisterEffect(e3)
end
function s.repfilter(c,tp)
	return c:IsControler(tp) and not c:IsReason(REASON_REPLACE)
		and (c:IsReason(REASON_BATTLE) or (c:IsReason(REASON_EFFECT) and c:GetReasonPlayer()==1-tp)) 
end
function s.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetFlagEffect(tp,id)==0 and c:IsDestructable(e) and not c:IsStatus(STATUS_DESTROY_CONFIRMED+STATUS_BATTLE_DESTROYED) 
		and eg:IsExists(s.repfilter,1,nil,tp) end
	if Duel.SelectEffectYesNo(tp,c,aux.Stringid(id,0)) then
		local g=eg:Filter(s.repfilter,nil,tp)
		if #g==1 then
			e:SetLabelObject(g:GetFirst())
		else
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESREPLACE)
			local cg=g:Select(tp,1,1,nil)
			e:SetLabelObject(cg:GetFirst())
		end
		c:SetStatus(STATUS_DESTROY_CONFIRMED,true)
		Duel.RegisterFlagEffect(tp,id,RESET_PHASE|PHASE_END,0,1)
		return true
	else return false end
end
function s.repval(e,c)
	return c==e:GetLabelObject()
end
function s.repop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	c:SetStatus(STATUS_DESTROY_CONFIRMED,false)
	Duel.Destroy(c,REASON_EFFECT|REASON_REPLACE)
end
function s.repfilter2(c,tp)
	return c:IsControler(1-tp) and not c:IsReason(REASON_REPLACE) and c:IsReason(REASON_BATTLE|REASON_EFFECT)
end
function s.reptg2(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetFlagEffect(tp,id+1)==0 and c:IsAbleToRemove() and eg:IsExists(s.repfilter2,1,nil,tp) end
	if Duel.SelectEffectYesNo(tp,c,aux.Stringid(id,1)) then
		local g=eg:Filter(s.repfilter2,nil,tp)
		if #g==1 then
			e:SetLabelObject(g:GetFirst())
		else
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESREPLACE)
			local cg=g:Select(tp,1,1,nil)
			e:SetLabelObject(cg:GetFirst())
		end
		Duel.RegisterFlagEffect(tp,id+1,RESET_PHASE|PHASE_END,0,1)
		return true
	else return false end
end
function s.repval2(e,c)
	return c==e:GetLabelObject()
end
function s.repop2(e,tp,eg,ep,ev,re,r,rp)
	Duel.Remove(e:GetHandler(),POS_FACEUP,REASON_EFFECT|REASON_REPLACE)
end