KeyBum trinket functionality

local function PaperKey(KBum, keytrinket)
    local player = Isaac.GetPlayer(0)
    -- the "keytrinket" variable stores the rng for the different trinket.
    -- item & trinket pools
    local TrinketItemPool = {17,175,199,343}
    local BackTrinketItemPool = {17,175,199,343}
    local TrinketPool = {19,36,83}
    local BackTrinketPool = {19,36,83}
    -- counter & variables to keep track of the trinkets
    local trinketCounter = 0
    local paperKey = false
    local rustKey = false
    local storeKey = false

    -- first we check if the player has two trinkets
    if player:GetTrinket(0) == TrinketType.TRINKET_STORE_KEY
    or player:GetTrinket(1) == TrinketType.TRINKET_STORE_KEY then
        table.remove(TrinketPool, 3)
        trinketCounter = trinketCounter + 1
        Mod:SaveData(trinketCounter)
        storeKey = true
    end
    if player:GetTrinket(0) == TrinketType.TRINKET_RUSTED_KEY
    or player:GetTrinket(1) == TrinketType.TRINKET_RUSTED_KEY then
        table.remove(TrinketPool, 2)
        trinketCounter = trinketCounter + 1
        Mod:SaveData(trinketCounter)
        rustKey = true
    end
    if player:GetTrinket(0) == TrinketType.TRINKET_PAPER_CLIP
    or player:GetTrinket(1) == TrinketType.TRINKET_PAPER_CLIP then
        table.remove(TrinketPool, 1)
        trinketCounter = trinketCounter + 1
        Mod:SaveData(trinketCounter)
        paperKey = true
    end

    if trinketCounter >= 2 then
        -- if the player has two key themed trinkets then we spawn an item
        -- we check what items the player has
       if player:HasCollectible(343) then
           table.remove(TrinketItemPool, 4)
       end
       if player:HasCollectible(199) then
           table.remove(TrinketItemPool, 3)
       end
       if DadsKey == true then
           table.remove(TrinketItemPool, 2)
       end
       if player:HasCollectible(17) then
           table.remove(TrinketItemPool, 1)
       end
       --now we check if the pool is empty
       if TrinketItemPool[1] ~= 17
       and TrinketItemPool[2] ~= 175
       and TrinketItemPool[3] ~= 199
       and TrinketItemPool[4] ~= 343 then
           -- if the item pool is empty then we "Breakfast"
           Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_CHEST, ChestSubtype.CHEST_CLOSED, KBum.Position, Vector(0,0), KBum)
       else
           -- we spawn an item from the pool
           local pickitem = math.random(#TrinketItemPool)
           Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_COLLECTIBLE, TrinketItemPool[pickitem], KBum.Position, Vector(0,0), KBum)
           if TrinketItemPool[pickitem] == 175 then
               DadsKey = true
           end
           -- we reset the items pools
           TrinketItemPool = BackTrinketItemPool
           TrinketPool = BackTrinketPool
       end
    else
        -- if the player doesn't have two key themed trinkets, then we check if he has a key themed trinket at all
        -- does the player have the Paper Clip?
        if paperKey == true then
            if keytrinket < 50 then
                -- item spawn code
            else
                -- 50% to spawn an other key themed trinket
                local picktrinket = math.random(#TrinketPool)
                Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketPool[picktrinket], KBum.Position, Vector(0,0), KBum)
                TrinketPool = BackTrinketPool
            end
        else
            -- spawn the Paper Clip trinket
            Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketType.TRINKET_PAPER_CLIP, KBum.Position, Vector(0,0), KBum)
        end

        -- does the player have the Rusted Key trinket?
        if rustKey == true then
            if keytrinket < 50 then
                -- item spawn code
            else
                -- 50% to spawn an other key themed trinket
                local picktrinket = math.random(#TrinketPool)
                Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketPool[picktrinket], KBum.Position, Vector(0,0), KBum)
                TrinketPool = BackTrinketPool
            end
        else
            -- spawn the Rusted Key trinket
            Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketType.TRINKET_RUSTED_KEY, KBum.Position, Vector(0,0), KBum)
        end

        -- does the player have the Store Key trinket?
        if storeKey == true then
            if keytrinket < 50 then
                -- item spawn code
            else
                -- 50% to spawn an other key themed trinket
                local picktrinket = math.random(#TrinketPool)
                Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketPool[picktrinket], KBum.Position, Vector(0,0), KBum)
                TrinketPool = BackTrinketPool
            end
        else
            -- spawn the Store Key trinket
            Isaac.Spawn(EntityType.ENTITY_PICKUP, PickupVariant.PICKUP_TRINKET, TrinketType.TRINKET_STORE_KEY, KBum.Position, Vector(0,0), KBum)
        end
    end

end