local Mod = RegisterMod("thebindingofoddport", 1)
local game = Game()

CollectibleType.COLLECTIBLE_FUNKYSTAR = Isaac.GetItemIdByName("Funky Star")

local FunkyStar = {
    DMG_MULT = 2,
    SCALE = 1.3
}

function Mod:onPassive(Tear)
    if Isaac.GetPlayer(0):HasCollectible(CollectibleType.COLLECTIBLE_FUNKYSTAR) then --they have the item
        local TearData = Tear:GetData() -- then look at its custom info
        if Tear.Variant ~= TearVariant.BLUE then
            Tear:ChangeVariant(TearVariant.BLUE)
        else
            if TearData.FunkyStar == nil then
                Tear.TearFlags = Tear.TearFlags | TearFlags.TEAR_LASER
                Tear.CollisionDamage = Tear.CollisionDamage * FunkyStar.DMG_MULT
                Tear:SetSize(Tear.Size * FunkyStar.SCALE, Vector(1,1), 8)
                Tear.SpriteScale = Tear.SpriteScale * FunkyStair.SCALE
                TearData.FunkyStar = true
            end
        end
    end
end

Mod:AddCallback(ModCallbacks.MC_POST_TEAR_UPDATE, Mod.onPassive)