#include "scroll.h"

#include "asm.h"
#include "beanstalkSubtask.h"
#include "collision.h"
#include "common.h"
#include "effects.h"
#include "entity.h"
#include "game.h"
#include "kinstone.h"
#include "manager/diggingCaveEntranceManager.h"
#include "map.h"
#include "object.h"
#include "sound.h"
#include "room.h"
#include "physics.h"
#include "player.h"
#include "screen.h"
#include "tileMap.h"
#include "tiles.h"

extern void UpdateScreenShake(void);
extern void sub_0807C8B0(u16*, u32, u32);
extern void sub_0807C810();
extern void DeleteSleepingEntities(void);
extern void sub_0807BBE4();
extern void CreateCollisionDataBorderAroundRoom();
extern void sub_0805E248();

extern u8 gUpdateVisibleTiles;
extern u16 gUnk_0200B640;
extern MapDataDefinition** gCaveBorderMapData[];
extern u16 gUnk_02022830[0xc00];
extern u16 gUnk_020246B0[0xc00];
extern u8 gMapSpecialTileToActTile[];

void Scroll0(RoomControls*);
void Scroll1(RoomControls*);
void Scroll2(RoomControls*);
void Scroll4(RoomControls*);
void Scroll5(RoomControls*);
void Scroll2Sub0(RoomControls*);
void Scroll2Sub1(RoomControls*);
void Scroll2Sub2(RoomControls*);
void sub_0807FEC8(RoomControls*);
void Scroll4Sub0(RoomControls*);
void Scroll4Sub1(RoomControls*);

void Scroll5Sub0(RoomControls*);
void Scroll5Sub1(RoomControls*);
void Scroll5Sub2(RoomControls*);
void Scroll5Sub3(RoomControls*);
void Scroll5Sub4(RoomControls*);
void Scroll5Sub5(RoomControls*);
u32 sub_080803D0();
u32 sub_08080278();
void sub_08080C80(MapDataDefinition*);
void sub_08080368();
void FillActTileForLayer(MapLayer* mapLayer);
bool32 IsPosInBorderTransitionRegion(const Transition* transition, u32 param_2, u32 param_3, u32 facing_direction);
bool32 IsPosInTransitionRect(const Transition* transition, u32 param_2, u32 param_3, u32 facing_direction);
void SetRoomTransitionTypeForAreaWarp(s32);
void SetRoomTransitionTypeForBorderWarp(s32);
void SetRoomTransitionTypeForArea2Warp(s32);
void SetRoomTransitionTypeForBorder2Warp(s32);

extern const s8 gShakeOffsets[];

void UpdateScroll(void) {
    static void (*const gUnk_0811E768[])(RoomControls*) = {
        Scroll0, Scroll1, Scroll2, NULL, Scroll4, Scroll5,
    };

    gRoomControls.scroll_flags &= 0xfb;
    gUnk_0811E768[gRoomControls.scrollAction](&gRoomControls);
}

void Scroll0(RoomControls* controls) {
    controls->scrollAction = 1;
    controls->reload_flags = 0;
    controls->scrollSpeed = 4;
    Scroll1(controls);
    UpdateIsDiggingCave();
}

// Scroll until target is at the center of the screen.
void Scroll1(RoomControls* controls) {
    s32 uVar2;
    s32 diff;
    s32 unused;
    s32 uVar5;
    s32 targetValue;

    if (controls->camera_target != NULL) {
        // Scroll in x direction.
        unused = controls->scroll_x;
        targetValue = controls->camera_target->x.HALF.HI - 0x78;
        diff = controls->scroll_x - targetValue;
        if (diff != 0) {
            uVar5 = controls->scroll_x & 7;
            if (diff >= 1) {
                if (controls->origin_x < controls->scroll_x) {
                    if (controls->scrollSpeed <= diff) {
                        diff = controls->scrollSpeed;
                        controls->scroll_flags |= 4;
                    }
                    controls->scroll_x = controls->scroll_x - diff;
                    if (uVar5 - diff < 1) {
                        gUpdateVisibleTiles = 1;
                    }
                    if (controls->origin_x >= controls->scroll_x) {
                        controls->scroll_x = controls->origin_x;
                    }
                }
            } else {
                uVar2 = controls->origin_x + controls->width - 0xf0;
                if (controls->scroll_x < uVar2) {
                    if (-controls->scrollSpeed >= diff) {
                        diff = -controls->scrollSpeed;
                        controls->scroll_flags |= 4;
                    }
                    controls->scroll_x -= diff;
                    if (uVar5 - diff > 7) {
                        gUpdateVisibleTiles = 1;
                    }
                    if (controls->scroll_x >= uVar2) {
                        controls->scroll_x = uVar2;
                    }
                }
            }
        }

        // Scroll in y direction.
        unused = controls->scroll_y;
        targetValue = controls->camera_target->y.HALF.HI - 0x50;
        diff = controls->scroll_y - (targetValue);
        if (diff != 0) {
            uVar5 = controls->scroll_y & 7;
            if (diff >= 1) {
                if (controls->origin_y < controls->scroll_y) {
                    if (controls->scrollSpeed <= diff) {
                        diff = controls->scrollSpeed;
                        controls->scroll_flags |= 4;
                    }
                    controls->scroll_y = controls->scroll_y - diff;
                    if (uVar5 - diff < 1) {
                        gUpdateVisibleTiles = 1;
                    }
                    if (controls->origin_y >= controls->scroll_y) {
                        controls->scroll_y = controls->origin_y;
                    }
                }
            } else {
                uVar2 = controls->origin_y + controls->height - DISPLAY_HEIGHT;
                if (controls->scroll_y < uVar2) {
                    if (-controls->scrollSpeed >= diff) {
                        diff = -controls->scrollSpeed;
                        controls->scroll_flags |= 4;
                    }
                    controls->scroll_y -= diff;
                    if (uVar5 - diff > 7) {
                        gUpdateVisibleTiles = 1;
                    }
                    if (controls->scroll_y >= uVar2) {
                        controls->scroll_y = uVar2;
                    }
                }
            }
        }
    }
    UpdateScreenShake();
}

void Scroll2(RoomControls* controls) {
    static void (*const Scroll2_SubActions[])(RoomControls*) = {
        Scroll2Sub0,
        Scroll2Sub1,
        Scroll2Sub2,
    };
    Scroll2_SubActions[controls->scrollSubAction](controls);
}

void Scroll2Sub0(RoomControls* controls) {
    gUpdateVisibleTiles = 1;
    UpdateScrollVram();
    controls->scrollSubAction = 1;
    gUpdateVisibleTiles = 0;
}

void Scroll2Sub1(RoomControls* controls) {
    controls->scrollSubAction = 2;
    controls->unk_18 = 0;
    gUpdateVisibleTiles = 2;
}

void Scroll2Sub2(RoomControls* controls) {
    Entity* target;

    gUpdateVisibleTiles = 2;
    controls->unk_18++;
    switch (controls->scroll_direction) {
        case 0:
            controls->scroll_y -= 4;
            target = controls->camera_target;
            if (target == &gPlayerEntity.base) {
                target->y.WORD = gPlayerEntity.base.y.WORD - Q_16_16(0.375);
            }
            if (controls->unk_18 == 0x28) {
                sub_0807FEC8(controls);
            }
            break;
        case 1:
            controls->scroll_x = controls->scroll_x + 4;
            if (controls->camera_target == &gPlayerEntity.base) {
                gPlayerEntity.base.x.WORD += Q_16_16(0.25);
            }
            if (controls->unk_18 == 0x3c) {
                sub_0807FEC8(controls);
            }
            break;
        case 2:
            controls->scroll_y = controls->scroll_y + 4;
            target = controls->camera_target;
            if (target == &gPlayerEntity.base) {
                target->y.WORD = gPlayerEntity.base.y.WORD + Q_16_16(0.375);
            }
            if (controls->unk_18 == 0x28) {
                sub_0807FEC8(controls);
            }
            break;
        case 3:
            controls->scroll_x -= 4;
            if (controls->camera_target == &gPlayerEntity.base) {
                gPlayerEntity.base.x.WORD -= Q_16_16(0.25);
            }
            if (controls->unk_18 == 0x3c) {
                sub_0807FEC8(controls);
            }
            break;
    }

    controls->shake_duration = 0;
    UpdateScreenShake();
}

void sub_0807FEC8(RoomControls* controls) {
    controls->scrollAction = 0;
    MemFill32(0xffffffff, gPlayerState.path_memory, sizeof(gPlayerState.path_memory));
    gPlayerState.startPosX = controls->camera_target->x.HALF.HI;
    gPlayerState.startPosY = controls->camera_target->y.HALF.HI;
}

void Scroll4(RoomControls* controls) {
    static void (*const Scroll4_SubActions[])(RoomControls*) = {
        Scroll4Sub0,
        Scroll4Sub1,
    };
    Scroll4_SubActions[controls->scrollSubAction](controls);
}

void Scroll4Sub0(RoomControls* controls) {
    controls->scrollSubAction = 1;
    controls->unk_18 = 0;
    gUpdateVisibleTiles = 3;
}

void Scroll4Sub1(RoomControls* controls) {
    if ((gRoomTransition.frameCount & 1U) == 0) {
        gUpdateVisibleTiles = 3;
        if (++controls->unk_18 > 0x13) {
            controls->scrollAction = 0;
            ClearEventPriority();
        }
    }
}

// Circular screen transition when entering a diggingCaveEntrance.
void Scroll5(RoomControls* controls) {
    static void (*const Scroll5_SubActions[])(RoomControls*) = {
        Scroll5Sub0, Scroll5Sub1, Scroll5Sub2, Scroll5Sub3, Scroll5Sub4, Scroll5Sub5,
    };
    Scroll5_SubActions[controls->scrollSubAction](controls);
}

void Scroll5Sub0(RoomControls* controls) {
    controls->scrollSubAction = 1;
    gScreen.lcd.displayControl |= DISPCNT_WIN1_ON;
    gScreen.controls.windowInsideControl = (u8)gScreen.controls.windowInsideControl | 0x1700;
    gScreen.controls.windowOutsideControl = (gScreen.controls.windowOutsideControl & 0xff00) | 7;
    gScreen.controls.window1HorizontalDimensions = 0xf0;
    gScreen.controls.window1VerticalDimensions = 0xf0;
    ResetActiveItems();
    ResetPlayerAnimationAndAction();
    if (gDiggingCaveEntranceTransition.isDiggingCave) {
        gPlayerEntity.base.animationState = 4;
    } else {
        gPlayerEntity.base.animationState = 0;
    }
    sub_080809D4();
}

void Scroll5Sub1(RoomControls* controls) {
    controls->scrollSubAction = 2;
    controls->unk_18 = sub_080803D0() + 6;
    gUnk_0200B640 = sub_08080278();
    LoadMapData(gCaveBorderMapData[gDiggingCaveEntranceTransition.entrance->type][0]);
    sub_0807C8B0(gMapTop.mapData, controls->width >> 4, controls->height >> 4);
    RenderMapLayerToSubTileMap(gMapDataTopSpecial, &gMapTop);
}

void Scroll5Sub2(RoomControls* controls) {
    s32 diffX;
    s32 diffY;
    s32 left;
    s32 right;
    s32 bottom;
    s32 top;

    controls->unk_18 -= 6;
    controls->unk_1a = (controls->unk_18 * 2) / 3;
    if (controls->unk_18 > 0x2a) {
        diffX = controls->camera_target->x.HALF.HI - controls->scroll_x;
        left = (diffX - controls->unk_18) + 8;
        if (left < 0) {
            left = 0;
        }
        right = diffX + controls->unk_18 - 8;
        if (right > DISPLAY_WIDTH) {
            right = DISPLAY_WIDTH;
        }
        diffY = controls->camera_target->y.HALF.HI - controls->scroll_y;
        bottom = (diffY - controls->unk_1a) + 8;
        if (bottom < 0) {
            bottom = 0;
        }
        top = diffY + controls->unk_1a - 8;
        if (top > DISPLAY_HEIGHT) {
            top = DISPLAY_HEIGHT;
        }
        gScreen.controls.window1HorizontalDimensions = ((left & 0xff) << 8) | (right & 0xff);
        gScreen.controls.window1VerticalDimensions = ((bottom & 0xff) << 8) | (top & 0xff);
    }
    if (controls->unk_18 == 0) {
        controls->scrollSubAction = 3;
        DeleteSleepingEntities();
        sub_0807C810();
        sub_08080C80(gCaveBorderMapData[gDiggingCaveEntranceTransition.entrance->type][1]);
    } else {
        gUpdateVisibleTiles = 4;
    }
}

void Scroll5Sub3(RoomControls* controls) {
    controls->scrollSubAction = 4;
    MemCopy(gMapBottom.mapData, gMapBottom.mapDataOriginal, sizeof(gMapBottom.mapData));
    MemCopy(gMapTop.mapData, gMapTop.mapDataOriginal, sizeof(gMapTop.mapData));
    sub_08080368();
    gUnk_02034480.unk_00 = gUnk_0200B640;
    MemCopy(gUnk_02022830, gUnk_020246B0, 0x1800);
    FillActTileForLayer(&gMapBottom);
    FillActTileForLayer(&gMapTop);
    sub_0807BBE4();
    CreateCollisionDataBorderAroundRoom();
    sub_0805E248();
    RenderMapLayerToSubTileMap(gMapDataBottomSpecial, &gMapBottom);
    RenderMapLayerToSubTileMap(gMapDataTopSpecial, &gMapTop);
}

void Scroll5Sub4(RoomControls* controls) {
    controls->scrollSubAction = 5;
    controls->unk_1c = 0xff;
    LoadRoom();
    CallRoomProp5And7();
    gUpdateVisibleTiles = 0;
    UpdateIsDiggingCave();
}

void Scroll5Sub5(RoomControls* controls) {
    s32 diffX;
    s32 diffY;
    s32 left;
    s32 right;
    s32 bottom;
    s32 top;

    controls->unk_18 += 6;
    controls->unk_1a = (controls->unk_18 * 2) / 3;
    if (controls->unk_18 > 0x1e) {
        diffX = controls->camera_target->x.HALF.HI - controls->scroll_x;
        left = (diffX - controls->unk_18);
        if (left < 0) {
            left = 0;
        }
        right = diffX + controls->unk_18;
        if (right > DISPLAY_WIDTH) {
            right = DISPLAY_WIDTH;
        }
        diffY = controls->camera_target->y.HALF.HI - controls->scroll_y;
        bottom = (diffY - controls->unk_1a);
        if (bottom < 0) {
            bottom = 0;
        }
        top = diffY + controls->unk_1a;
        if (top > DISPLAY_HEIGHT) {
            top = DISPLAY_HEIGHT;
        }
        gScreen.controls.window1HorizontalDimensions = ((left & 0xff) << 8) | (right & 0xff);
        gScreen.controls.window1VerticalDimensions = ((bottom & 0xff) << 8) | (top & 0xff);
    }
    if (controls->unk_1c == 0) {
        controls->scrollAction = 0;
        controls->reload_flags = 0;
        ClearEventPriority();
        gScreen.lcd.displayControl &= ~DISPCNT_WIN1_ON;
        gScreen.controls.windowInsideControl &= 0xff;
        gScreen.controls.windowOutsideControl &= 0xff00;
    } else {
        gUpdateVisibleTiles = 4;
        controls->unk_1c = 0;
    }
}

u32 sub_08080278(void) {
    u16* ptr1 = (u16*)gUnk_02022830;
    u16* mapBottomData = gMapBottom.mapData;
    u16* mapTopData = gMapTop.mapData;
    u16* mapBottomDataClone = gMapBottom.mapDataOriginal;
    u16* mapTopDataClone = gMapTop.mapDataOriginal;
    u32 width = gRoomControls.width >> 4;
    u32 height = (gRoomControls.height >> 4) << 6;

    u32 result;
    u32 y, x;

    for (result = 0, y = 0; y < height; y += 0x40) {
        for (x = 0; x < width; x++) {
            u32 tilePos = y + x;
            if (mapBottomDataClone[tilePos] != mapBottomData[tilePos]) {
                if (mapBottomData[tilePos] < 0x4000) {
                    ptr1[0] = tilePos | 0x4000;
                    ptr1[1] = mapBottomData[tilePos];
                    ptr1 += 2;
                    result++;
                    if (result >= 0x600) {
                        return result;
                    }
                }
            }
            if (mapTopDataClone[tilePos] != mapTopData[tilePos]) {
                if (mapTopData[tilePos] < 0x4000) {
                    ptr1[0] = tilePos | 0x8000;
                    ptr1[1] = mapTopData[tilePos];
                    ptr1 += 2;
                    result++;
                    if (result >= 0x800) {
                        return result;
                    }
                }
            }
        }
    }
    return result;
}

void sub_08080368(void) {
    u32 tmp;
    u32 index;
    u16* ptr;

    if ((gDiggingCaveEntranceTransition.previousArea != gRoomControls.area) &&
        (gDiggingCaveEntranceTransition.previousArea != 0xff)) {
        gUnk_02034480.unk_00 = 0;
    } else {
        ptr = gUnk_020246B0;
        tmp = gUnk_02034480.unk_00 << 1;
        index = 0;
        while (index < tmp) {
            SetTileByIndex(ptr[1], ptr[0] & 0xfff, (ptr[0] >> 0xe));
            ptr += 2;
            index += 2;
        }
        gUpdateVisibleTiles = 0;
    }
}

u32 sub_080803D0(void) {
    s32 delta_x, delta_y, dd_x, dd_y, pos_x, pos_y, scroll_x, scroll_y;
    s32 xy49, r4, r7, r8, delta_yy, delta_xx;

    scroll_x = gRoomControls.scroll_x - gRoomControls.origin_x;
    pos_x = gRoomControls.camera_target->x.HALF.HI - gRoomControls.origin_x;
    scroll_y = gRoomControls.scroll_y - gRoomControls.origin_y;
    pos_y = gRoomControls.camera_target->y.HALF.HI - gRoomControls.origin_y;
    dd_x = 0x3c;

    do {
        r7 = 0;
        dd_x += 6;
        delta_xx = dd_x * dd_x;
        dd_y = dd_x * 2 / 3;
        delta_yy = dd_y * dd_y;

        delta_x = dd_x;
        delta_y = 0;
        r4 = (-(dd_x * 2) + 1) * delta_yy + delta_xx * 2;
        xy49 = delta_x * delta_yy / delta_xx; // = x * 4/9
        while (delta_y <= xy49) {

            if (scroll_y + 0xa8 > pos_y + delta_y) {
                if (scroll_x + 0xf8 > delta_x + pos_x) {
                    r7 |= 1;
                }
                if (scroll_x < pos_x - delta_x + 8) {
                    r7 |= 2;
                }
            }
            if (scroll_y < pos_y - delta_y + 8) {
                if (scroll_x + 0xf8 > delta_x + pos_x) {
                    r7 |= 4;
                }
                if (scroll_x < pos_x - delta_x + 8) {
                    r7 |= 8;
                }
            }

            if (r4 > 0) {
                r4 += ((-(delta_x << 0x2) + 4) * delta_yy) + (delta_xx * (6 + 4 * delta_y));
                delta_x--;
                xy49 = delta_x * delta_yy / delta_xx;
            } else {
                r4 += (delta_xx * (6 + 4 * delta_y));
            }

            delta_y++;
        }

        delta_x = 0;
        delta_y = dd_y;
        r4 = delta_yy * 2 + (delta_y * -2 + 1) * delta_xx;
        xy49 = delta_y * delta_xx / delta_yy; // y * 9 / 4
        while (delta_x <= xy49) {
            if (scroll_y + 0xa8 > pos_y + delta_y) {
                if (scroll_x + 0xf8 > pos_x + delta_x) {
                    r7 |= 0x10;
                }
                if (scroll_x < pos_x + 8 - delta_x) {
                    r7 |= 0x20;
                }
            }
            if (scroll_y < pos_y - delta_y + 8) {
                if (scroll_x + 0xf8 > pos_x + delta_x) {
                    r7 |= 0x40;
                }
                if (scroll_x < pos_x + 8 - delta_x) {
                    r7 |= 0x80;
                }
            }

            if (r4 > 0) {
                r4 += delta_yy * (6 + (4 * delta_x)) + (delta_y * -4 + 4) * delta_xx;
                delta_y--;
                xy49 = delta_y * delta_xx / delta_yy;
            } else {
                r4 += delta_yy * (6 + (4 * delta_x));
            }
            delta_x++;
        }
    } while (r7 != 0);

    return dd_x;
}

void UpdateIsDiggingCave(void) {
    switch (gRoomControls.area) {
        case AREA_LAKE_WOODS_CAVE:
        case AREA_HYRULE_DIG_CAVES:
        case AREA_DIG_CAVES:
        case AREA_CRENEL_DIG_CAVE:
        case AREA_VEIL_FALLS_DIG_CAVE:
        case AREA_CASTOR_WILDS_DIG_CAVE:
        case AREA_HYLIA_DIG_CAVES:
            gDiggingCaveEntranceTransition.isDiggingCave = 1;
            return;
    }
    gDiggingCaveEntranceTransition.isDiggingCave = 0;
}

void ClearTileMaps(void) {
    MemClear(&gRoomControls, sizeof(gRoomControls));
    MemClear(&gDiggingCaveEntranceTransition, sizeof(gDiggingCaveEntranceTransition));
    gRoomControls.unk_22 = 0xffff;
    gDiggingCaveEntranceTransition.previousArea = 0xff;
    gUnk_02034480.unk_00 = 0;
    MemClear(&gMapDataBottomSpecial, 0x8000);
    MemClear(&gMapDataTopSpecial, 0x8000);
}

bool32 DoApplicableTransition(u32 x, u32 y, u32 direction, u32 warp_types) {
    static bool32 (*const gUnk_0811E7AC[])(const Transition*, u32, u32, u32) = {
        IsPosInBorderTransitionRegion,
        IsPosInTransitionRect,
        IsPosInBorderTransitionRegion,
        IsPosInTransitionRect,
    };

    const Transition* transition = gArea.pCurrentRoomInfo->exits;
    while (transition->warp_type != WARP_TYPE_END_OF_LIST) {
        if (((1 << transition->warp_type) & warp_types) != 0 &&
            gUnk_0811E7AC[transition->warp_type](transition, x, y, direction)) {
            DoExitTransition(transition);
            return 1;
        }
        transition++;
    }
    return 0;
}

const Transition* FindApplicableAreaTransition(u32 pos_x, u32 pos_y) {
    const Transition* transition = gArea.pCurrentRoomInfo->exits;
    u32 warp_types = 0xa;
    while (transition->warp_type != WARP_TYPE_END_OF_LIST) {
        if (((1 << transition->warp_type) & warp_types) != 0 &&
            IsPosInTransitionRect(transition, pos_x, pos_y, 0)) {
            return transition;
        }
        transition++;
    }
    return NULL;
}

bool32 IsPosInBorderTransitionRegion(const Transition* transition, u32 pos_x, u32 pos_y, u32 facing_direction) {
    u32 shapeBitmask;

    switch (facing_direction) {
        default:
            return FALSE;
        case 0:
            if (gRoomControls.width / 2 < pos_x) {
                shapeBitmask = TRANSITION_SHAPE_BORDER_NORTH_EAST;
            } else {
                shapeBitmask = TRANSITION_SHAPE_BORDER_NORTH_WEST;
            }
            break;
        case 1:
            if (gRoomControls.height / 2 < pos_y) {
                shapeBitmask = TRANSITION_SHAPE_BORDER_EAST_SOUTH;
            } else {
                shapeBitmask = TRANSITION_SHAPE_BORDER_EAST_NORTH;
            }
            break;
        case 2:
            if (gRoomControls.width / 2 < pos_x) {
                shapeBitmask = TRANSITION_SHAPE_BORDER_SOUTH_EAST;
            } else {
                shapeBitmask = TRANSITION_SHAPE_BORDER_SOUTH_WEST;
            }
            break;
        case 3:
            if (gRoomControls.height / 2 < pos_y) {
                shapeBitmask = TRANSITION_SHAPE_BORDER_WEST_SOUTH;
            } else {
                shapeBitmask = TRANSITION_SHAPE_BORDER_WEST_NORTH;
            }
            break;
    }

    if ((transition->shape & shapeBitmask) != 0) {
        return TRUE;
    }
    return FALSE;
}

bool32 IsPosInTransitionRect(const Transition* transition, u32 pos_x, u32 pos_y, u32 facing_direction) {
    static const u8 gShapeDimensions[] = { 6, 6, 6, 14, 14, 6, 22, 6 };
    const u8* shape;
    u32 shape_x;
    u32 delta_x;
    u32 shape_y;
    u32 delta_y;
    shape = &gShapeDimensions[transition->shape * 2];
    shape_x = shape[0];
    delta_x = pos_x - transition->startX;
    if (delta_x + shape_x <= shape_x * 2) {
        shape_y = shape[1];
        delta_y = pos_y - transition->startY;
        if (delta_y + shape_y <= shape_y * 2) {
            return TRUE;
        }
    }
    return FALSE;
}

void DoExitTransition(const Transition* data) {
    static void (*const sSetRoomTransitionTypes[])(s32) = {
        SetRoomTransitionTypeForAreaWarp,
        SetRoomTransitionTypeForBorderWarp,
        SetRoomTransitionTypeForArea2Warp,
        SetRoomTransitionTypeForBorder2Warp,
    };
    PlayerRoomStatus* status;
    gRoomTransition.transitioningOut = 1;
    status = &gRoomTransition.player_status;
    if (data->endX <= 0x3ff) {
        status->start_pos_x = data->endX;
    } else {
        status->start_pos_x = gRoomControls.camera_target->x.HALF.HI | 0x8000;
    }
    if (data->endY <= 0x3ff) {
        status->start_pos_y = data->endY;
    } else {
        status->start_pos_y = gRoomControls.camera_target->y.HALF.HI | 0x8000;
    }
    status->area_next = data->area;
    status->room_next = data->room;
    status->layer = data->layer;
    status->spawn_type = data->transition_type;
    status->start_anim = data->facing_direction;
    if (data->transitionSFX != SFX_NONE) {
        SoundReq(data->transitionSFX);
    }
    sSetRoomTransitionTypes[data->warp_type](data->shape);
}

void SetRoomTransitionTypeForAreaWarp(s32 param_1) {
    gRoomTransition.type = TRANSITION_DEFAULT;
}

void SetRoomTransitionTypeForBorderWarp(s32 param_1) {
    if (CheckAreaOverworld(gRoomTransition.player_status.area_next)) {
        gRoomTransition.type = TRANSITION_DEFAULT;
    } else {
        gRoomTransition.type = TRANSITION_FADE_BLACK;
    }
}

void SetRoomTransitionTypeForArea2Warp(s32 param_1) {
    gRoomTransition.type = TRANSITION_CUT;
}

void SetRoomTransitionTypeForBorder2Warp(s32 param_1) {
    gRoomTransition.type = TRANSITION_CUT;
}

void DoExitTransitionWithType(const Transition* screenTransition, u32 transitionType) {
    DoExitTransition(screenTransition);
    gRoomTransition.type = transitionType;
}

void sub_08080930(u32 unused) {
    gRoomControls.scrollAction = 5;
    gRoomControls.scrollSubAction = 0;
    gRoomControls.reload_flags = 2;
    gRoomControls.scroll_direction = 0;
    SetInitializationPriority();
}

MapLayer* GetLayerByIndex(u32 layerIndex) {
    if (layerIndex == LAYER_TOP) {
        return &gMapTop;
    } else {
        return &gMapBottom;
    }
}

void InitScreenShake(u32 time, u32 magnitude) {
    gRoomControls.shake_duration = time;
    gRoomControls.shake_magnitude = magnitude & 7;
}

void sub_08080974(u32 arg0, u32 arg1) {
    u32 var0, var1;
    RoomControls* roomControls = &gRoomControls;

    var0 = roomControls->origin_x;
    if (arg0 <= var0 + 120) {
        roomControls->scroll_x = var0;
    } else {
        var0 += roomControls->width;
        var1 = var0 - 120;
        if (arg0 < var1) {
            var1 = arg0;
        }
        roomControls->scroll_x = var1 - 120;
    }

    var0 = roomControls->origin_y;
    if (arg1 <= var0 + 80) {
        roomControls->scroll_y = var0;
    } else {
        var0 += roomControls->height;
        var1 = var0 - 80;
        if (arg1 < var1) {
            var1 = arg1;
        }
        roomControls->scroll_y = var1 - 80;
    }

    sub_080809D4();
    gUpdateVisibleTiles = 1;
}

void sub_080809D4(void) {
    s32 x, y;
    s32 var1, var0;
    RoomControls* roomControls = &gRoomControls;
    roomControls->scroll_flags &= ~4;

    x = roomControls->camera_target->x.HALF.HI;
    var0 = roomControls->origin_x;
    if (x <= var0 + 120) {
        roomControls->scroll_x = var0;
    } else {
        var0 += roomControls->width;
        var1 = var0 - 120;
        if (x < var1) {
            var1 = (u16)roomControls->camera_target->x.HALF.HI;
        }
        roomControls->scroll_x = var1 - 120;
    }

    y = roomControls->camera_target->y.HALF.HI;
    var0 = roomControls->origin_y;
    if (y <= var0 + 80) {
        roomControls->scroll_y = var0;
    } else {
        var0 += roomControls->height;
        var1 = var0 - 80;
        if (y < var1) {
            var1 = (u16)roomControls->camera_target->y.HALF.HI;
        }
        roomControls->scroll_y = var1 - 80;
    }

    UpdateScreenShake();
    gUpdateVisibleTiles = 1;
}

void UpdateDoorTransition() {
    u32 actTile;
    u32 x;
    u32 y;
    RoomControls* controls = &gRoomControls;
    if (gRoomControls.camera_target != &gPlayerEntity.base) {
        return;
    }
    if (gPlayerState.jump_status != 0) {
        return;
    }
    switch (gRoomControls.camera_target->action) {
        case 0x0f:
            if (gRoomControls.area == 0x48) {
                return;
            }
        case 1:
        case 9:
        case 0x18:
        case 0x1d:
            y = controls->camera_target->y.HALF.HI - controls->origin_y;
            x = controls->camera_target->x.HALF.HI - controls->origin_x;
            actTile = GetActTileAtTilePos(
                (((controls->camera_target->x.HALF.HI - controls->origin_x) >> 4) & 0x3F) |
                    ((((controls->camera_target->y.HALF.HI - controls->origin_y) >> 4) & 0x3F) << 6),
                controls->camera_target->collisionLayer);
            gRoomTransition.stairs_idx = GetTileTypeAtRoomCoords(x, y, controls->camera_target->collisionLayer);
            switch (actTile) {
                case ACT_TILE_63:
                case ACT_TILE_241:
                case ACT_TILE_40:
                case ACT_TILE_41:
                    DoApplicableTransition(x, y, 0xff, 10);
                    break;
            }
    }
}

// fill the actTile for the whole layer
void FillActTileForLayer(MapLayer* mapLayer) {
    u32 tilePos;
    u16* tileTypes = mapLayer->tileTypes;
    const u8* ptr = gMapTileTypeToActTile;
    u8* actTiles = mapLayer->actTiles;
    u16* mapData = mapLayer->mapData;
    for (tilePos = 0; tilePos < 0x40 * 0x40; tilePos++) {
        u16 tileIndex = mapData[tilePos];
        if (tileIndex < 0x4000) {
            mapLayer->actTiles[tilePos] = ptr[tileTypes[tileIndex]];
        } else {
            mapLayer->actTiles[tilePos] = gMapSpecialTileToActTile[tileIndex - 0x4000];
        }
    }
}

void UpdateScreenShake(void) {
    const s8* screenShakeOffset;
    s32 roomOffsetX = (gRoomControls.scroll_x - gRoomControls.origin_x) & 0xf;
    s32 roomOffsetY = ((gRoomControls.scroll_y - gRoomControls.origin_y) & 0xf) + 8;
    if (gRoomControls.shake_duration != 0) {
        gRoomControls.shake_duration--;
        screenShakeOffset = &gShakeOffsets[gRoomControls.shake_magnitude * 0x10 + (gRoomControls.shake_duration & 0xe)];
        if (gMapBottom.bgSettings != NULL) {
            gMapBottom.bgSettings->xOffset = screenShakeOffset[0] + roomOffsetX;
            gMapBottom.bgSettings->yOffset = screenShakeOffset[1] + roomOffsetY;
        }
        if (gMapTop.bgSettings != NULL) {
            gMapTop.bgSettings->xOffset = screenShakeOffset[0] + roomOffsetX;
            gMapTop.bgSettings->yOffset = screenShakeOffset[1] + roomOffsetY;
        }
        gRoomControls.aff_x = screenShakeOffset[0];
        gRoomControls.aff_y = screenShakeOffset[1];
    } else {
        if (gMapBottom.bgSettings != NULL) {
            gMapBottom.bgSettings->xOffset = roomOffsetX;
            gMapBottom.bgSettings->yOffset = roomOffsetY;
        }
        if (gMapTop.bgSettings != NULL) {
            gMapTop.bgSettings->xOffset = roomOffsetX;
            gMapTop.bgSettings->yOffset = roomOffsetY;
        }
        gRoomControls.aff_x = 0;
        gRoomControls.aff_y = 0;
    }
}

void sub_08080C80(MapDataDefinition* dataDefinition) {
    LoadMapData(dataDefinition);
    sub_0807C8B0(gMapBottom.mapData, gRoomControls.width / 16, gRoomControls.height / 16);
    sub_0807C8B0(gMapTop.mapData, gRoomControls.width / 16, gRoomControls.height / 16);
}

void sub_08080CB4(Entity* this) {
    Entity* effect;
    u32 tmp;
    u32 tmp2;
    u32 tmp3;
    u32 mask;

    if (this->type != this->animIndex) {
        InitAnimationForceUpdate(this, this->type);
        if (this->type == 0x5c) {
            const KinstoneWorldEvent* ptr = &gKinstoneWorldEvents[this->type2];
            tmp = ptr->objPalette;
            tmp2 = tmp & 0xf;
            this->palette.raw = (tmp << 4) | tmp2;
        }
    } else {
        UpdateAnimationSingleFrame(this);
        if (this->spriteSettings.draw != 0) {
            switch (this->type) {
                case 0x60:
                    if (((GenericEntity*)this)->field_0x6a.HALF.LO != 0) {
                        ((GenericEntity*)this)->field_0x6a.HALF.LO--;
                    } else {
                        ((GenericEntity*)this)->field_0x6a.HALF.LO = (Random() & 0x1f) + 10;
                        effect = CreateFx(this, FX_SPARKLE, 0);
                        if (effect != NULL) {
                            effect->spriteOffsetX = this->spriteOffsetX;
                            effect->spriteOffsetY = this->spriteOffsetY;
                            SortEntityAbove(this, effect);
                        }
                    }
                    break;
                case 0x40:
                case 0x41:
                case 0x42:
                case 0x43:
                case 0x5c:
                case 0x62:
                    if ((gRoomTransition.frameCount & 0xf) == 0) {
                        CreateSparkleFx(this);
                    }
                    break;
            }
        }
    }
}