Wind Waker - Layer Logic

int determineLayer(int layerOverride)
{
    int layer = layerOverride;

    if (layerOverride < 0)
    {
        layer = 0;
        int hour = calculateHour();
        if (isEndlessNight() || (hour < 6 || hour >= 18))
            layer = 1;

        if (stage == "sea") //Ocean
        {
            if (room == 44) //Outset
            {
                if (readFlag(Flags.GossipStone))
                    return layer | 4; //Outset after Forsaken Fortress 1
                if (readFlag(Flags.PiratesOnOutsetBeach))
                    return layer | 2; //Pirates at the beach
                if (readFlag(Flags.RescuedTetra))
                    return 9; //Tetra and Aryll at the top of Outset
            }
            else if (room == 11) //Windfall
            {
                if (readFlag(Flags.AnimationSet2))
                    return layer | 4; //After Forsaken Fortress 2
                if (isEndlessNight())
                    return layer | 2; //Pirates at Windfall
            }
            else if (room == 1) //Forsaken Fortress
            {
                if (readFlag(Flags.SpokeToKoRLAfterHyrule2))
                    return 3; //Forsaken Fortress 3
                else
                    return 1; //Forsaken Fortress 2
            }
        }
        else if (stage == "A_mori")  //Forest of Fairies
        {
            if (readFlag(Flags.KoRLUnlocked))
                return layer | 2; //Moblins
        }
        else if (stage == "Asoko") //Pirate Ship
        {
            if (readFlag(Flags.GossipStone))
                return layer | 2; //Bombs Minigame
        }
        else if (stage == "Hyrule") //Hyrule
        {
            if (getTriforcePiecesCount() == 8)
                return layer | 4; //No Courtyard Cutscene
            if (readFlag(Flags.DescendedDownToHyrule2))
                return layer | 2; //Courtyard Cutscene
        }
        else if (stage == "Hyroom") //Hyrule Interior
        {
            if (getTriforcePiecesCount() == 8 && !readFlag(Flags.MightyDarknutsDefeated))
                return layer | 4;
            if (readFlag(Flags.DescendedDownToHyrule2))
                return layer | 2;
            if (readFlag(Flags.Hyrule1ElectricalBarrierDeactivated))
                return layer | 6;
        }
        else if (stage == "kenroom") //Master Sword Room
        {
            if (readFlag(Flags.MightyDarknutsDefeated))
                return layer | 6; //Empty
            if (getTriforcePiecesCount() == 8)
                return layer | 4; //Mighty Darknuts
            if (readFlag(Flags.DescendedDownToHyrule2))
                return layer | 2; //Tetra to Zelda Transformation
        }
        else if (stage == "M2tower") //Helmaroc Tower
        {
            if (readFlag(Flags.AnimationSet2))
                return layer | 2; //Helmaroc Fight
        }
        else if (stage == "GanonK") //Puppet Ganon Room
        {
            if (readFlag(Flag.PuppetGanonFightIntro))
                return 8; //Puppet Ganon Fight
        }
        else if (stage == "GTower") //On Top of Ganon's Tower
        {
            if (readFlag(Flag.GanondorfFightIntro))
                return 8; //Ganondorf Fight
        }
    }

    return layer;
}