--鋼鉄の襲撃者
--Heavy Metal Raiders
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)
	--indes
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_INDESTRUCTABLE_COUNT)
	e2:SetRange(LOCATION_FZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.indtg)
	e2:SetValue(s.indct)
	c:RegisterEffect(e2)
	--special summon
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP)
	e3:SetCode(EVENT_BATTLE_DESTROYED)
	e3:SetRange(LOCATION_FZONE)
	e3:SetCountLimit(1,0,EFFECT_COUNT_CODE_SINGLE)
	e3:SetCondition(s.spcon1)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
	local e4=e3:Clone()
	e4:SetCode(EVENT_DESTROYED)
	e4:SetCondition(s.spcon2)
	c:RegisterEffect(e4)
end
function s.indtg(e,c)
	return c:IsRace(RACE_MACHINE) and c:IsAttribute(ATTRIBUTE_DARK)
end
function s.indct(e,re,r,rp)
	local c=e:GetHandler()
	if r & REASON_BATTLE ==0 then return 0 end
	local tp=e:GetHandlerPlayer()
	local a=Duel.GetAttacker()
	local tc=a:GetBattleTarget()
	if tc and tc:IsControler(1-tp) then a,tc=tc,a end
	local dam=Duel.GetBattleDamage(tp)
	if not tc or dam<=0 then return 1 end
	c:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD,0,1)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetValue(dam)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e1)
	--Reset
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_ADJUST)
	e2:SetRange(LOCATION_MZONE)
	e2:SetOperation(function (e)
		if c:GetFlagEffect(id)==0 then
			e1:Reset()
			e:Reset()
		end
	end)
	e2:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e2)
	return 1
end
function s.spcon1(e,tp,eg,ep,ev,re,r,rp)
	local tc=eg:GetFirst()
	local bc=tc:GetBattleTarget()
	return not tc:IsPreviousControler(tp)
		and bc:IsControler(tp) and bc:GetOriginalAttribute()==ATTRIBUTE_DARK and bc:GetOriginalRace()==RACE_MACHINE
end
function s.cfilter(c)
	return c:IsReason(REASON_EFFECT) and c:IsPreviousLocation(LOCATION_ONFIELD)
end
function s.spcon2(e,tp,eg,ep,ev,re,r,rp)
	if not re then return false end
	local rc=re:GetHandler()
	return rc:IsControler(tp) and rc:GetOriginalAttribute()==ATTRIBUTE_DARK
		and rc:GetOriginalRace()==RACE_MACHINE
		and eg:IsExists(s.cfilter,1,nil)
end
function s.spfilter(c,e,tp)
	return c:IsRace(RACE_MACHINE) and c:IsAttribute(ATTRIBUTE_DARK) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end