#include "global.h"
#include "asm_fieldmap.h"

extern u32 gUnknown_08376008[];

void FieldObjectUpdateMetatileBehaviors(struct MapObject *);
void GetGroundEffectFlags_Reflection(struct MapObject *, u32 *);
void GetGroundEffectFlags_TallGrassOnSpawn(struct MapObject *, u32 *);
void GetGroundEffectFlags_TallGrassOnBeginStep(struct MapObject *, u32 *);
void GetGroundEffectFlags_LongGrassOnSpawn(struct MapObject *, u32 *);
void GetGroundEffectFlags_LongGrassOnBeginStep(struct MapObject *, u32 *);
void GetGroundEffectFlags_Tracks(struct MapObject *, u32 *);
void GetGroundEffectFlags_SandHeap(struct MapObject *, u32 *);
void GetGroundEffectFlags_ShallowFlowingWater(struct MapObject *, u32 *);
void GetGroundEffectFlags_Puddle(struct MapObject *, u32 *);
void GetGroundEffectFlags_Ripple(struct MapObject *, u32 *);
void GetGroundEffectFlags_ShortGrass(struct MapObject *, u32 *);
void GetGroundEffectFlags_HotSprings(struct MapObject *, u32 *);
void GetGroundEffectFlags_Seaweed(struct MapObject *, u32 *);
void GetGroundEffectFlags_JumpLanding(struct MapObject *, u32 *);
u8 FieldObjectCheckForReflectiveSurface(struct MapObject *);

void GetAllGroundEffectFlags_OnSpawn(struct MapObject *mapObj, u32 *flags)
{
    FieldObjectUpdateMetatileBehaviors(mapObj);
    GetGroundEffectFlags_Reflection(mapObj, flags);
    GetGroundEffectFlags_TallGrassOnSpawn(mapObj, flags);
    GetGroundEffectFlags_LongGrassOnSpawn(mapObj, flags);
    GetGroundEffectFlags_SandHeap(mapObj, flags);
    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
    GetGroundEffectFlags_ShortGrass(mapObj, flags);
    GetGroundEffectFlags_HotSprings(mapObj, flags);
}

void GetAllGroundEffectFlags_OnBeginStep(struct MapObject *mapObj, u32 *flags)
{
    FieldObjectUpdateMetatileBehaviors(mapObj);
    GetGroundEffectFlags_Reflection(mapObj, flags);
    GetGroundEffectFlags_TallGrassOnBeginStep(mapObj, flags);
    GetGroundEffectFlags_LongGrassOnBeginStep(mapObj, flags);
    GetGroundEffectFlags_Tracks(mapObj, flags);
    GetGroundEffectFlags_SandHeap(mapObj, flags);
    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
    GetGroundEffectFlags_Puddle(mapObj, flags);
    GetGroundEffectFlags_ShortGrass(mapObj, flags);
    GetGroundEffectFlags_HotSprings(mapObj, flags);
}

void GetAllGroundEffectFlags_OnFinishStep(struct MapObject *mapObj, u32 *flags)
{
    FieldObjectUpdateMetatileBehaviors(mapObj);
    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
    GetGroundEffectFlags_SandHeap(mapObj, flags);
    GetGroundEffectFlags_Puddle(mapObj, flags);
    GetGroundEffectFlags_Ripple(mapObj, flags);
    GetGroundEffectFlags_ShortGrass(mapObj, flags);
    GetGroundEffectFlags_HotSprings(mapObj, flags);
    GetGroundEffectFlags_Seaweed(mapObj, flags);
    GetGroundEffectFlags_JumpLanding(mapObj, flags);
}

void FieldObjectUpdateMetatileBehaviors(struct MapObject *mapObj)
{
    mapObj->mapobj_unk_1F = MapGridGetMetatileBehaviorAt(mapObj->coords3.x, mapObj->coords3.y);
    mapObj->mapobj_unk_1E = MapGridGetMetatileBehaviorAt(mapObj->coords2.x, mapObj->coords2.y);
}

void GetGroundEffectFlags_Reflection(struct MapObject *mapObj, u32 *flags)
{
    u32 reflectionFlags[2] = { 0x00000020, 0x00000010 };
    u8 type;

    type = FieldObjectCheckForReflectiveSurface(mapObj);

    if (type)
    {
        if (!mapObj->mapobj_bit_17)
        {
            mapObj->mapobj_bit_17 = 0;
            mapObj->mapobj_bit_17 = 1;
            *flags |= reflectionFlags[type - 1];
        }
    }
    else
    {
        mapObj->mapobj_bit_17 = 0;
    }
}