#ifndef M_COLLISION_BG_H
#define M_COLLISION_BG_H

#include "types.h"
#include "m_lib.h"

#ifdef __cplusplus
extern "C" {
#endif

#define mCoBG_HEIGHT_MAX 31

enum field_layer {
    mCoBG_LAYER0,
    mCoBG_LAYER1,
    mCoBG_LAYER2,
    mCoBG_LAYER3,

    mCoBG_LAYER_NUM
};

enum {
    mCoBG_FTR_TYPEA,
    mCoBG_FTR_TYPEB_0,
    mCoBG_FTR_TYPEB_180,
    mCoBG_FTR_TYPEB_270,
    mCoBG_FTR_TYPEB_90,
    mCoBG_FTR_TYPEC,

    mCoBG_FTR_TYPE_NUM
};

enum background_attribute {
    /* TODO: finish */
    mCoBG_ATTRIBUTE_GRASS0,
    mCoBG_ATTRIBUTE_GRASS1,
    mCoBG_ATTRIBUTE_GRASS2,
    mCoBG_ATTRIBUTE_GRASS3,
    mCoBG_ATTRIBUTE_SOIL0,
    mCoBG_ATTRIBUTE_SOIL1,
    mCoBG_ATTRIBUTE_SOIL2,
    mCoBG_ATTRIBUTE_STONE,
    mCoBG_ATTRIBUTE_FLOOR,
    mCoBG_ATTRIBUTE_BUSH,
    mCoBG_ATTRIBUTE_HOLE,
    mCoBG_ATTRIBUTE_WAVE,
    mCoBG_ATTRIBUTE_WATER,
    mCoBG_ATTRIBUTE_WATERFALL,
    mCoBG_ATTRIBUTE_RIVER_N,
    mCoBG_ATTRIBUTE_RIVER_NW,
    mCoBG_ATTRIBUTE_RIVER_W,
    mCoBG_ATTRIBUTE_RIVER_SW,
    mCoBG_ATTRIBUTE_RIVER_S,
    mCoBG_ATTRIBUTE_RIVER_SE,
    mCoBG_ATTRIBUTE_RIVER_E,
    mCoBG_ATTRIBUTE_RIVER_NE,
    mCoBG_ATTRIBUTE_SAND,
    mCoBG_ATTRIBUTE_WOOD,
    mCoBG_ATTRIBUTE_SEA,
    // ...

    mCoBG_ATTRIBUTE_NONE = 100
};

enum {
    mCoBG_PLANT0 = 0, /* Stay a sapling */
    mCoBG_PLANT1 = 1, /* Grow until the first stage of growth */
    mCoBG_PLANT2 = 2, /* Grow until the second stage of growth */
    mCoBG_PLANT3 = 3, /* Grow until the third stage of growth */
    mCoBG_PLANT4 = 4, /* Fully grow */

    mCoBG_KILL_PLANT = 7 /* No growth, all plants die on this unit  */
};

enum {
    mCoBG_DIRECT_N,
    mCoBG_DIRECT_W,
    mCoBG_DIRECT_S,
    mCoBG_DIRECT_E,
    mCoBG_DIRECT_NW,
    mCoBG_DIRECT_NE,
    mCoBG_DIRECT_SE,
    mCoBG_DIRECT_SW,

    mCoBG_DIRECT_NUM
};

enum {
    mCoBG_AREA_N,
    mCoBG_AREA_W,
    mCoBG_AREA_S,
    mCoBG_AREA_E,

    mCoBG_AREA_NUM
};

/* sizeof(mCoBG_CollisionData_c) == 4*/
typedef struct collision_bg_data_s {
    /* 1------- -------- -------- -------- */ u32 shape : 1; /* collision shape */
    /* -11111-- -------- -------- -------- */ u32 center : 5;
    /* ------11 111----- -------- -------- */ u32 top_left : 5;
    /* -------- ---11111 -------- -------- */ u32 bot_left : 5;
    /* -------- -------- 11111--- -------- */ u32 top_right : 5;
    /* -------- -------- -----111 11------ */ u32 bot_right : 5;
    /* -------- -------- -------- --111111 */ u32 unit_attribute : 6; /* background_attribute type */
} mCoBG_CollisionData_c;

/* sizeof (mCoBG_Collision_u) == 4 */
typedef union collision_bg_u {
    mCoBG_CollisionData_c data;
    u32 raw;
} mCoBG_Collision_u;

typedef struct collision_unit_info_s {
    mCoBG_Collision_u* collision;
    f32 leftUp_offset;
    f32 leftDown_offset;
    f32 rightDown_offset;
    f32 rightUp_offset;
    f32 base_height;
    f32 pos_x;
    f32 pos_z;
    int ut_x;
    int ut_z;
    int shape;
    u8 attribute;
    mActor_name_t item;
} mCoBG_UnitInfo_c;

#define mCoBG_HIT_WALL (1 << 0)       /* in contact with *any* wall        */
#define mCoBG_HIT_WALL_FRONT (1 << 1) /* in contact with wall to the front */
#define mCoBG_HIT_WALL_RIGHT (1 << 2) /* in contact with wall to the right */
#define mCoBG_HIT_WALL_LEFT (1 << 3)  /* in contact with wall to the left  */
#define mCoBG_HIT_WALL_BACK (1 << 4)  /* in contact with wall to the back  */

typedef struct collision_bg_check_result_s {
    u32 on_ground : 1;
    u32 hit_attribute_wall : 5;
    u32 hit_wall : 5;
    u32 hit_wall_count : 3;
    u32 unk_flag0 : 1;
    u32 unit_attribute : 6;
    u32 is_on_move_bg_obj : 1;
    u32 is_in_water : 1;
    u32 unk_flag1 : 1;
    u32 unk_flag2 : 1;
    u32 unk_flag3 : 1;
    u32 unk_flag4 : 1;
    u32 unk_flag5 : 1;
    u32 unk_flag6 : 4;
} mCoBG_CheckResult_c;

typedef struct wall_info_s {
    s16 angleY;
    s16 type;
} mCoBG_WallInfo_c;

typedef struct collision_bg_check_s {
    mCoBG_Collision_u collision_units[5];
    mCoBG_CheckResult_c result;
    f32 wall_top_y;
    f32 wall_bottom_y;
    f32 ground_y;
    mCoBG_WallInfo_c wall_info[2];
    s16 in_front_wall_angle_y;
} mCoBG_Check_c;

typedef struct bg_side_contact_s {
    s16 name;
    s16 angle;
} mCoBG_side_contact_c;

typedef struct bg_contact_s {
    mCoBG_side_contact_c side_contact[5];
    int side_count;
    s16 on_contact_names[5];
    int on_count;
} mCoBG_bg_contact_c;

typedef struct bg_size_s {
    f32 right_size; // x |   *->
    f32 left_size;  //  x | <-*
    f32 up_size;    //   z | ^
    f32 down_size;  // z | v
} mCoBG_bg_size_c;

typedef struct bg_register_s {
    xyz_t* wpos;
    xyz_t* last_wpos;
    s16* angle_y;
    mCoBG_bg_contact_c* contact;
    mCoBG_bg_size_c* bg_size;
    xyz_t* base_ofs;
    f32 height;
    u32 attribute;
    f32 active_dist;
    f32* scale_percent;
} mCoBG_bg_regist_c;

typedef struct collision_offset_table_s {
    u8 unit_attribute;
    s8 centerRight_offset;
    s8 leftUp_offset;
    s8 leftDown_offset;
    s8 rightDown_offset;
    s8 rightUp_offset;
    s8 shape;
} mCoBG_OffsetTable_c;

typedef struct collision_actor_info_s {
    mActor_name_t name_id;
    u8 _02;
    u8 on_ground;
    u8 _04;
    u8 in_water;
    u8 _06[2]; // alignment?
    mCoBG_CheckResult_c* check_res_p;
    xz_t speed_xz0;
    xz_t speed_xz1;
    xyz_t center_pos;
    xyz_t old_center_pos;
    xyz_t rev_pos;
    u8 _40[4];
    f32 _44;
    f32 _48;
    f32 _4C;
    u8 _50[0x20];
} mCoBG_ActorInf_c;

extern u32 mCoBG_Wpos2BgAttribute_Original(xyz_t wpos);
extern u32 mCoBG_Wpos2Attribute(xyz_t wpos, s8* is_diggable);
extern int mCoBG_CheckWaterAttribute(u32 attribute);
extern f32 mCoBG_GetBgY_AngleS_FromWpos(s_xyz* angle_to_ground, xyz_t wpos, f32 offset_y);
extern f32 mCoBG_GetShadowBgY_AngleS_FromWpos(f32, s_xyz*, xyz_t);
extern int mCoBG_CheckWaterAttribute_OutOfSea(u32 attribute);
extern int mCoBG_CheckHole_OrgAttr(u32 attribute);
extern f32 mCoBG_GetBgY_OnlyCenter_FromWpos(xyz_t wpos, f32 dist);
extern f32 mCoBG_GetBgY_OnlyCenter_FromWpos2(xyz_t wpos, f32 foot_dist);
extern int mCoBG_Attribute2CheckPlant(u32 attribute, const xyz_t* wpos);
extern void mCoBG_BgCheckControll(xyz_t* reverse_pos, ACTOR* actor, f32 check_range, f32 offset_y, s16 wall_attr_check,
                                  s16 no_reverse, s16 check_type);
extern int mCoBG_Height2GetLayer(f32 height);
extern void mCoBG_SetPlussOffset(xyz_t wpos, s16 offset, s16 new_attrib);
extern int mCoBG_GetLayer(const xyz_t* wpos);
extern int mCoBG_BnumUnum2HoleNumber(int block_x, int block_z, int ut_x, int ut_z);
extern u32 mCoBG_UtNum2BgAttr(int ut_x, int ut_z);
extern f32 mCoBG_UtNum2UtCenterY(int ut_x, int ut_z);
extern int mCoBG_CheckCliffAttr(u32 attribute);
extern void mCoBG_SetPluss5PointOffset_file(xyz_t pos, mCoBG_OffsetTable_c offsetptr, const char* file, int line);
#define mCoBG_SetPluss5PointOffset(pos, offsetptr) mCoBG_SetPluss5PointOffset_file(pos, offsetptr, __FILE__, __LINE__);
extern int mCoBG_Change2PoorAttr(mCoBG_Collision_u* col);
extern int mCoBG_CheckHole(xyz_t wpos);
extern int mCoBG_CheckSkySwing(xyz_t wpos);
extern void mCoBG_Ut2SetDefaultOffset(int ut_x, int ut_z);
extern int mCoBG_CheckWaveAttr(u32 attribute);
extern int mCoBG_CheckPlant(xyz_t wpos);
extern void mCoBG_InitBoatCollision();
extern int mCoBG_CheckAttribute_BallRolling(s16* angles, const xyz_t* wpos);
extern f32 mCoBG_CheckBallRollingArea(s16 angle, const xyz_t* wpos);
extern int mCoBG_ExistHeightGap_KeepAndNow_Detail(xyz_t wpos);
extern int mCoBG_GetHoleNumber(xyz_t wpos);
extern int mCoBG_Attr2CheckPlaceNpc(u32 attribute);
extern int mCoBG_ExistHeightGap_KeepAndNow(xyz_t wpos);
extern void mCoBG_GetNorm_By3Point(xyz_t* norm, xyz_t* p0, xyz_t* p1, xyz_t* p2);
extern int mCoBG_SearchWaterLimitDistN(xyz_t* water_pos, xyz_t wpos, s16 angle, float max_dist, int divisor);
extern f32 mCoBG_GetBalloonGroundY(const xyz_t* pos);
extern void mCoBG_MakeBoatCollision(ACTOR* actor, xyz_t* pos, s16* angle_y);
extern void mCoBG_DeleteBoatCollision(ACTOR* actor);
extern void mCoBG_WaveCos2BgCheck(f32 wave_cos);
extern int mCoBG_RegistMoveBg(mCoBG_bg_regist_c* bg_regist, xyz_t* wpos, xyz_t* last_wpos, s16* angle_y, f32 height,
                              mCoBG_bg_size_c* bg_size, f32* scale_percent, mCoBG_bg_contact_c* bg_contact, xyz_t* ofs,
                              int type, u32 attribute, f32 check_dist);
extern void mCoBG_CrossOffMoveBg(int move_bg_idx);
extern int mCoBG_CheckPlace(xyz_t wpos);
extern int mCoBG_CheckSandHole_ClData(mCoBG_Collision_u* col);
extern int mCoBG_GetHoleNumber_ClData(mCoBG_Collision_u* col);
extern void mCoBG_GetBgNorm_FromWpos(xyz_t* norm, xyz_t wpos);
extern int mCoBG_GetWaterFlow(xyz_t* water_flow, u32 attr);
extern void mCoBG_SetAttribute(xyz_t pos, u32 attr);
extern int mCoBG_GetPointInfoFrontLine(f32* line, f32* check_pos, f32* norm);
extern int mCoBG_GetCrossCircleAndLine2Dvector(f32* cross0_xz, f32* cross1_xz, f32* point_xz, f32* vec_xz,
                                               f32* center_xz, f32 radius);
extern f32 mCoBG_GetVectorProductin2D(f32* vec0_xz, f32* vec1_xz);
extern int mCoBG_GetCrossLineAndPerpendicular(f32* cross_xz, f32* start_xz, f32* end_xz, f32* point_xz);
extern int mCoBG_RangeCheckLinePoint(f32* start_xz, f32* end_xz, f32* point_xz);
extern int mCoBG_GetDistPointAndLine2D_Norm(f32* dist, f32* start_xz, f32* end_xz, f32* norm, f32* point_xz);
extern f32 mCoBG_Get2VectorAngleF(f32* v0, f32* v1, u8 type);
extern int mCoBG_CheckUtFlat(const xyz_t* pos);
extern void mCoBG_BgCheckControll_RemoveDirectedUnitColumn(xyz_t* reverse_pos, ACTOR* actor, f32 check_range,
                                                           f32 offset_y, s16 wall_attr_check, s16 no_reverse,
                                                           s16 check_type, int ut_x, int ut_z);
extern xyz_t mCoBG_UniqueWallCheck(ACTOR* actorx, f32 range, f32 y_ofs);
extern xyz_t mCoBG_ScopeWallCheck(ACTOR* actorx, const xyz_t* pos, f32 x, f32 z, f32 range, f32 y_ofs);

extern void mCoBG_InitMoveBgData();
extern void mCoBG_InitBlockBgCheckMode();
extern void mCoBG_InitDecalCircle();

extern void mCoBG_CalcTimerDecalCircle();

extern f32 mCoBG_GetWaterHeight_File(xyz_t wpos, char* file, int line);
#define mCoBG_GetWaterHeight(wpos) mCoBG_GetWaterHeight_File(wpos, __FILE__, __LINE__)

extern int mCoBG_CheckSandUt_ForFish(xyz_t* wpos);

#ifdef __cplusplus
}
#endif

#endif