#include "global.h"
#include "bg.h"
#include "constants/items.h"
#include "constants/songs.h"
#include "decompress.h"
#include "event_data.h"
#include "gpu_regs.h"
#include "international_string_util.h"
#include "item.h"
#include "list_menu.h"
#include "main.h"
#include "malloc.h"
#include "menu.h"
#include "menu_indicators.h"
#include "money.h"
#include "new_menu_helpers.h"
#include "palette.h"
#include "rom_818CFC8.h"
#include "sound.h"
#include "sprite.h"
#include "string.h"
#include "string_util.h"
#include "task.h"
#include "menu_helpers.h"
#include "unknown_task.h"
#include "window.h"

struct bagStruct {
    void *func; 
    u8 unk4;
    u8 pocket;
    u8 unk6[2];
    u16 unk8[5];
    u16 unk12[5];
    void *unk1C;
};

struct unkBagStruct {
    void* unk0;
    u8 unk4[0x800];
    u8 unk804;
    u8 filler4[11];
    u8 unk810[10];
    u8 unk81A;
    u8 unk81B:4;
    u8 unk81B_1:2;
    u8 unk81B_3:1;
    u8 unk81B_2:1;
    u8 filler3[2];
    u8 unk81E;
    u8 unk81F;
    u8 filler5[9];
    u8 unk829[5];
    u8 unk82E[6];
    s16 unk834;
    u8 filler2[0x412];
};

struct listBuffer1 {
    struct ListMenuItem subBuffers[65];
};

struct listBuffer2 {
    s8 name[65][24];
};

extern struct bagStruct gUnknown_0203CE58;
extern struct unkBagStruct *gUnknown_0203CE54;
extern struct listBuffer1 *gUnknown_0203CE74;
extern struct listBuffer2 *gUnknown_0203CE78;
extern u16 gUnknown_0203CE6A[];
extern u16 gUnknown_0203CE60[];
extern void sub_8086194(void);
extern void sub_80861B0(void);
extern void sub_816B31C(void);
extern void bag_menu_leave_maybe_3(void);
extern void bag_menu_leave_maybe_2(void);
extern void bag_menu_leave_maybe(void);
extern void CB2_ExitSellMenu(void);
extern void SetCB2ToReshowScreenAfterMenu2(void);
extern void sub_81C4F98(u8, void(*)(void));
extern bool8 sub_81221EC(void);
extern bool8 sub_81221AC(void);
extern void sub_81ABA6C(void);
extern void sub_81ABAC4(void);
extern void sub_81ABAE0(void);
extern u8 sub_81AB1F0(u8);
extern void sub_80D4FAC(void);
extern void RemoveBagItemIconObject(u8);
extern u8 ListMenuGetYCoordForPrintingArrowCursor(u8);
extern u8 GetMenuCursorDimensionByFont(u8, u8);
extern u8 AddScrollIndicatorArrowPair(void*, void*);
extern void sub_80D6FB4(struct BagPocket*);
extern void sub_80D6F64(struct BagPocket*);

void GoToBagMenu(u8 bagMenuType, u8 pocketId, void ( *postExitMenuMainCallback2)());
void CB2_Bag(void);
bool8 setup_bag_menu(void);
void bag_menu_init_bgs(void);
bool8 load_bag_menu_graphics(void);
void setup_bag_menu_textboxes(void);
void allocate_bag_item_list_buffers(void);
void load_bag_item_list_buffers(u8);
void bag_menu_print_pocket_names(u8*, u8);
void bag_menu_copy_pocket_name_to_window(u8);
void bag_menu_draw_pocket_indicator_square(u8, u8);
void AddBagVisualObject(u8);
void bag_menu_add_pocket_scroll_arrow_indicators_maybe(void);
void bag_menu_add_list_scroll_arrow_indicators_maybe(void);
void bag_menu_prepare_tmhm_move_window(void);
bool8 IsWallysBag(void);
void Task_WallyTutorialBagMenu(u8);
void Task_BagMenu(u8);
void get_name(s8*, u16);
u16 ItemIdToBattleMoveId(u16);
void ShakeBagVisual(void);
u16 BagGetItemIdByPocketPosition(u8, u16);
void AddBagItemIconObject(u16, u8);
void bag_menu_print_description_box_text(int);
void bag_menu_print_cursor(u8, u8);
void bag_menu_print(u8, u8, u8*, u8, u8, u8, u8, u8, u8);
bool8 itemid_is_unique(u16);
u16 BagGetQuantityByPocketPosition(u8, u16);
void sub_81AB89C(void);
void task_close_bag_menu_2(u8);
u8 AddItemMessageWindow(u8);
void bag_menu_RemoveBagItem_message_window(u8);
void set_callback3_to_bag(u8);
void sub_81ABC54(u8, s16);
u8 bag_menu_add_window(u8);
u8 GetSwitchBagPocketDirection(void);
void SwitchBagPocket(u8, s8, u8);
bool8 sub_81AC2C0(void);
void bag_menu_swap_items(u8);

extern u8 *gPocketNamesStringsTable[];
extern struct BgTemplate gUnknown_08613F90[];
extern u8 gBagScreen_Gfx[];
extern u8 gUnknown_08D9A88C[];
extern u16 gBagScreenFemale_Pal[];
extern u16 gBagScreenMale_Pal[];
extern struct CompressedSpriteSheet gUnknown_0857FB34;
extern struct CompressedSpriteSheet gUnknown_0857FB3C;
extern struct CompressedSpritePalette gUnknown_0857FB44;
extern u8 gText_CloseBag[];
extern struct ListMenuTemplate gUnknown_08613F9C;
extern u8 gText_ClearTo11Var1Clear5Var2[];
extern u8 gText_UnkF908Var1Clear7Var2[];
extern u8 gMoveNames[][0xD];
extern u8 gBagMenuHMIcon_Gfx[];
extern u8 gUnknown_086140A4[];
extern u8 gText_xVar1[];
extern u8* gReturnToXStringsTable[];
extern u8 gText_ReturnToVar1[];
extern u8 gText_SelectorArrow2[];
extern u32 gUnknown_08614094[];
extern u32 gUnknown_0203CE5E[];
extern u16 gSpecialVar_ItemId;
extern TaskFunc gUnknown_08614054[];

void ResetBagScrollPositions(void)
{
    gUnknown_0203CE58.pocket = 0;
    memset(gUnknown_0203CE58.unk8, 0, 10);
    memset(gUnknown_0203CE58.unk12, 0, 10);
}

void CB2_BagMenuFromStartMenu(void)
{
    GoToBagMenu(0, 5, sub_8086194);
}

void sub_81AABB0(void)
{
    if (!InBattlePyramid())
        GoToBagMenu(1, 5, SetCB2ToReshowScreenAfterMenu2);
    else
        sub_81C4F98(1, SetCB2ToReshowScreenAfterMenu2);
}

void CB2_ChooseBerry(void)
{
    GoToBagMenu(4, 3, sub_80861B0);
}

void sub_81AABF0(void(*callback)(void))
{
    GoToBagMenu(5, 3, callback);
}

void CB2_GoToSellMenu(void)
{
    GoToBagMenu(3, 5, CB2_ExitSellMenu);
}

void sub_81AAC14(void)
{
    GoToBagMenu(6, 5, sub_816B31C);
}

void sub_81AAC28(void)
{
    GoToBagMenu(9, 5, bag_menu_leave_maybe_3);
    gSpecialVar_0x8005 = 0;
    gSpecialVar_Result = 0;
}

void sub_81AAC50(void)
{
    GoToBagMenu(7, 5, bag_menu_leave_maybe_2);
    gSpecialVar_Result = 0;
}

void sub_81AAC70(void)
{
    GoToBagMenu(8, 5, bag_menu_leave_maybe);
    gSpecialVar_Result = 0;
}

void GoToBagMenu(u8 bagMenuType, u8 pocketId, void ( *postExitMenuMainCallback2)())
{
    u8 temp;
    gUnknown_0203CE54 = AllocZeroed(sizeof(struct unkBagStruct));
    if (gUnknown_0203CE54 == 0)
        SetMainCallback2(postExitMenuMainCallback2);
    else
    {
        if (bagMenuType != 12)
            gUnknown_0203CE58.unk4 = bagMenuType;
        if (postExitMenuMainCallback2)
            gUnknown_0203CE58.func = postExitMenuMainCallback2;
        if (pocketId <= 4)
            gUnknown_0203CE58.pocket = pocketId;
        temp = gUnknown_0203CE58.unk4 - 4;
        if (temp <= 1)
            gUnknown_0203CE54->unk81B = 1;
        gUnknown_0203CE54->unk0 = 0;
        gUnknown_0203CE54->unk81A = 0xFF;
        gUnknown_0203CE54->unk81E = -1;
        gUnknown_0203CE54->unk81F = -1;
        memset(&gUnknown_0203CE54->unk804, 0xFF, 12);
        memset(gUnknown_0203CE54->unk810, 0xFF, 10);
        SetMainCallback2(CB2_Bag);
    }
}

void c2_bag_3(void)
{
    RunTasks();
    AnimateSprites();
    BuildOamBuffer();
    do_scheduled_bg_tilemap_copies_to_vram();
    UpdatePaletteFade();
}

void vblank_cb_bag_menu(void)
{
    LoadOam();
    ProcessSpriteCopyRequests();
    TransferPlttBuffer();
}

void CB2_Bag(void)
{
    while(sub_81221EC() != TRUE && setup_bag_menu() != TRUE && sub_81221AC() != TRUE) {};
}

bool8 setup_bag_menu(void)
{
    u32 index;
    u8 taskId;

    switch (gMain.state)
    {
    case 0:
        SetVBlankHBlankCallbacksToNull();
        clear_scheduled_bg_copies_to_vram();
        gMain.state++;
        break;
    case 1:
        ScanlineEffect_Stop();
        gMain.state++;
        break;
    case 2:
        FreeAllSpritePalettes();
        gMain.state++;
        break;
    case 3:
        ResetPaletteFade();
        gPaletteFade.bufferTransferDisabled = TRUE;
        gMain.state++;
        break;
    case 4:
        ResetSpriteData();
        gMain.state++;
        break;
    case 5:
        gMain.state++;
        break;
    case 6:
        if (sub_81221AC() == FALSE)
            ResetTasks();
        gMain.state++;
        break;
    case 7:
        bag_menu_init_bgs();
        gUnknown_0203CE54->unk834 = 0;
        gMain.state++;
        break;
    case 8:
        if (!load_bag_menu_graphics())
            break;
        gMain.state++;
        break;
    case 9:
        setup_bag_menu_textboxes();
        gMain.state++;
        break;
    case 10:
        sub_81ABA6C();
        sub_81ABAC4();
        sub_81ABAE0();
        gMain.state++;
        break;
    case 11:
        allocate_bag_item_list_buffers();
        gMain.state++;
        break;
    case 12:
        load_bag_item_list_buffers(gUnknown_0203CE58.pocket);
        gMain.state++;
        break;
    case 13:
        bag_menu_print_pocket_names(gPocketNamesStringsTable[gUnknown_0203CE58.pocket], 0);
        bag_menu_copy_pocket_name_to_window(0);
        bag_menu_draw_pocket_indicator_square(gUnknown_0203CE58.pocket, 1);
        gMain.state++;
        break;
    case 14:
        taskId = sub_81AB1F0(gUnknown_0203CE58.unk4);
        gTasks[taskId].data[0] = ListMenuInit(&gMultiuseListMenuTemplate, gUnknown_0203CE58.unk12[gUnknown_0203CE58.pocket], gUnknown_0203CE58.unk8[gUnknown_0203CE58.pocket]);
        gTasks[taskId].data[3] = 0;
        gTasks[taskId].data[8] = 0;
        gMain.state++;
        break;
    case 15:
        AddBagVisualObject(gUnknown_0203CE58.pocket);
        gMain.state++;
        break;
    case 16:
        sub_80D4FAC();
        gMain.state++;
        break;
    case 17:
        bag_menu_add_pocket_scroll_arrow_indicators_maybe();
        bag_menu_add_list_scroll_arrow_indicators_maybe();
        gMain.state++;
        break;
    case 18:
        bag_menu_prepare_tmhm_move_window();
        gMain.state++;
        break;
    case 19:
        BlendPalettes(-1, 16, 0);
        gMain.state++;
        break;
    case 20:
        BeginNormalPaletteFade(-1, 0, 16, 0, 0);
        gPaletteFade.bufferTransferDisabled = FALSE;
        gMain.state++;
        break;
    default:
        SetVBlankCallback(vblank_cb_bag_menu);
        SetMainCallback2(c2_bag_3);
        return TRUE;
    }
    return FALSE;
}

void bag_menu_init_bgs(void)
{
    ResetVramOamAndBgCntRegs();
    memset(gUnknown_0203CE54->unk4, 0, 0x800);
    ResetBgsAndClearDma3BusyFlags(0);
    InitBgsFromTemplates(0, gUnknown_08613F90, 3);
    SetBgTilemapBuffer(2, gUnknown_0203CE54->unk4);
    ResetAllBgsCoordinates();
    schedule_bg_copy_tilemap_to_vram(2);
    SetGpuReg(REG_OFFSET_DISPCNT, 0x1040);
    ShowBg(0);
    ShowBg(1);
    ShowBg(2);
    SetGpuReg(REG_OFFSET_BLDCNT, 0);
}

bool8 load_bag_menu_graphics(void)
{
    switch (gUnknown_0203CE54->unk834)
    {
        case 0:
            reset_temp_tile_data_buffers();
            decompress_and_copy_tile_data_to_vram(2, gBagScreen_Gfx, 0, 0, 0);
            gUnknown_0203CE54->unk834++;
            break;
        case 1:
            if (free_temp_tile_data_buffers_if_possible() != TRUE)
            {
                LZDecompressWram(gUnknown_08D9A88C, gUnknown_0203CE54->unk4);
                gUnknown_0203CE54->unk834++;
            }
            break;
        case 2:
            if (!IsWallysBag() && gSaveBlock2Ptr->playerGender != MALE)
                LoadCompressedPalette(gBagScreenFemale_Pal, 0, 0x40);
            else
                LoadCompressedPalette(gBagScreenMale_Pal, 0, 0x40);
            gUnknown_0203CE54->unk834++;
            break;
        case 3:
            if (IsWallysBag() == TRUE || gSaveBlock2Ptr->playerGender == MALE)
                LoadCompressedObjectPic(&gUnknown_0857FB34);
            else
                LoadCompressedObjectPic(&gUnknown_0857FB3C);
            gUnknown_0203CE54->unk834++;
            break;
        case 4:
            LoadCompressedObjectPalette(&gUnknown_0857FB44);
            gUnknown_0203CE54->unk834++;
            break;
        default:
            LoadListMenuArrowsGfx();
            gUnknown_0203CE54->unk834 = 0;
            return TRUE;
    }
    return FALSE;
}

u8 sub_81AB1F0(u8 a)
{
    u8 taskId;
    if (a == 10)
        taskId = CreateTask(Task_WallyTutorialBagMenu, 0);
    else
        taskId = CreateTask(Task_BagMenu, 0);
    return taskId;
}

void allocate_bag_item_list_buffers(void)
{
    gUnknown_0203CE74 = Alloc(sizeof(struct listBuffer1));
    gUnknown_0203CE78 = Alloc(sizeof(struct listBuffer2));
}

void load_bag_item_list_buffers(u8 pocketId)
{
    u16 i;
    struct BagPocket *pocket = &gBagPockets[pocketId];
    struct ListMenuItem *subBuffer;
    
    if (!gUnknown_0203CE54->unk81B_2)
    {
        for (i = 0;i < gUnknown_0203CE54->unk829[pocketId] - 1; i++)
        {
            get_name(gUnknown_0203CE78->name[i], pocket->itemSlots[i].itemId);
            subBuffer = gUnknown_0203CE74->subBuffers;
            subBuffer[i].name = gUnknown_0203CE78->name[i];
            subBuffer[i].id = i;
        }
        StringCopy(gUnknown_0203CE78->name[i], gText_CloseBag);
        subBuffer = gUnknown_0203CE74->subBuffers;
        subBuffer[i].name = gUnknown_0203CE78->name[i];
        subBuffer[i].id = -2;
    }
    else
    {
        for (i = 0;i < gUnknown_0203CE54->unk829[pocketId]; i++)
        {
            get_name(gUnknown_0203CE78->name[i], pocket->itemSlots[i].itemId);
            subBuffer = gUnknown_0203CE74->subBuffers;
            subBuffer[i].name = gUnknown_0203CE78->name[i];
            subBuffer[i].id = i;
        }
    }
    gMultiuseListMenuTemplate = gUnknown_08613F9C;
    gMultiuseListMenuTemplate.totalItems = gUnknown_0203CE54->unk829[pocketId];
    gMultiuseListMenuTemplate.items = gUnknown_0203CE74->subBuffers;
    gMultiuseListMenuTemplate.maxShowed = gUnknown_0203CE54->unk82E[pocketId];
}

void get_name(s8 *dest, u16 itemId)
{
    switch (gUnknown_0203CE58.pocket)
    {
        case 2:
            StringCopy(gStringVar2, gMoveNames[ItemIdToBattleMoveId(itemId)]);
            if (itemId >= ITEM_HM01)
            {
                ConvertIntToDecimalStringN(gStringVar1, itemId - ITEM_HM01 + 1, 2, 1);
                StringExpandPlaceholders(dest, gText_ClearTo11Var1Clear5Var2);
            }
            else
            {
                ConvertIntToDecimalStringN(gStringVar1, itemId - ITEM_TM01 + 1, 2, 2);
                StringExpandPlaceholders(dest, gText_UnkF908Var1Clear7Var2);
            }
            break;
        case 3:
            ConvertIntToDecimalStringN(gStringVar1, itemId - ITEM_CHERI_BERRY + 1, 2, 2);
            CopyItemName(itemId, gStringVar2);
            StringExpandPlaceholders(dest, gText_UnkF908Var1Clear7Var2);
            break;
        default:
            CopyItemName(itemId, dest);
            break;
    }
}

void bag_menu_change_item_callback(u32 a, u8 b)
{
    if (b != 1)
    {
        PlaySE(SE_SELECT);
        ShakeBagVisual();
    }
    if (gUnknown_0203CE54->unk81A == 0xFF)
    {
        RemoveBagItemIconObject(1 ^ gUnknown_0203CE54->unk81B_1);
        if (a != -2)
           AddBagItemIconObject(BagGetItemIdByPocketPosition(gUnknown_0203CE58.pocket + 1, a), gUnknown_0203CE54->unk81B_1);
        else
           AddBagItemIconObject(-1, gUnknown_0203CE54->unk81B_1);
        gUnknown_0203CE54->unk81B_1 ^= 1;
        if (!gUnknown_0203CE54->unk81B_3)
            bag_menu_print_description_box_text(a);
    }
}

void sub_81AB520(u8 rboxId, int item_index_in_pocket, u8 a)
{
    u16 itemId;
    u16 itemQuantity;
    bool8 unique;
    int offset;
    if (item_index_in_pocket != -2)
    {
        if (gUnknown_0203CE54->unk81A != 0xFF)
        {
            if (gUnknown_0203CE54->unk81A == (u8)item_index_in_pocket)
                bag_menu_print_cursor(a, 2);
            else
                bag_menu_print_cursor(a, -1);
        }
        itemId = BagGetItemIdByPocketPosition(gUnknown_0203CE58.pocket + 1, item_index_in_pocket);
        itemQuantity = BagGetQuantityByPocketPosition(gUnknown_0203CE58.pocket + 1, item_index_in_pocket);
        if ((u16)(itemId - ITEM_HM01) <= 7)
            BlitBitmapToWindow(rboxId, gBagMenuHMIcon_Gfx, 8, a - 1, 16, 16);
        if (gUnknown_0203CE58.pocket == 3)
        {
            ConvertIntToDecimalStringN(gStringVar1, itemQuantity, 1, 3);
            StringExpandPlaceholders(gStringVar4, gText_xVar1);
            offset = GetStringRightAlignXOffset(7, gStringVar4, 0x77);
            bag_menu_print(rboxId, 7, gStringVar4, offset, a, 0, 0, -1, 0);
        }
        else if (gUnknown_0203CE58.pocket != 4 && (unique = itemid_is_unique(itemId)) == FALSE)
        {
            ConvertIntToDecimalStringN(gStringVar1, itemQuantity, 1, 2);
            StringExpandPlaceholders(gStringVar4, gText_xVar1);
            offset = GetStringRightAlignXOffset(7, gStringVar4, 0x77);
            bag_menu_print(rboxId, 7, gStringVar4, offset, a, unique, unique, -1, unique);
        }
        else
        {
            if (gSaveBlock1Ptr->registeredItem && gSaveBlock1Ptr->registeredItem == itemId)
                BlitBitmapToWindow(rboxId, gUnknown_086140A4, 0x60, a - 1, 0x18, 16);
        }
    }
}

void bag_menu_print_description_box_text(int a)
{
    u8* str;
    if (a != -2)
        str = (u8*)ItemId_GetDescription(BagGetItemIdByPocketPosition(gUnknown_0203CE58.pocket + 1, a));
    else
    {
        StringCopy(gStringVar1, gReturnToXStringsTable[gUnknown_0203CE58.unk4]);
        str = gStringVar4;
        StringExpandPlaceholders(str, gText_ReturnToVar1);
    }
    FillWindowPixelBuffer(1, 0);
    bag_menu_print(1, 1, str, 3, 1, 0, 0, 0, 0);
}

void bag_menu_print_cursor_(u8 a, u8 b)
{
    bag_menu_print_cursor(ListMenuGetYCoordForPrintingArrowCursor(a), b);
}

void bag_menu_print_cursor(u8 a, u8 b)
{
    if (b == 0xFF)
        FillWindowPixelRect(0, 0, 0, a, GetMenuCursorDimensionByFont(1, 0), GetMenuCursorDimensionByFont(1, 1));
    else
        bag_menu_print(0, 1, gText_SelectorArrow2, 0, a, 0, 0, 0, b);

}

void bag_menu_add_pocket_scroll_arrow_indicators_maybe(void)
{
    if (gUnknown_0203CE54->unk81E == 0xFF)
        gUnknown_0203CE54->unk81E = AddScrollIndicatorArrowPairParametrized(2, 0xAC, 12, 0x94, gUnknown_0203CE54->unk829[gUnknown_0203CE58.pocket] - gUnknown_0203CE54->unk82E[gUnknown_0203CE58.pocket], 0x6E, 0x6E, &gUnknown_0203CE58.unk12[gUnknown_0203CE58.pocket]);
}

void sub_81AB824(void)
{
    if (gUnknown_0203CE54->unk81E != 0xFF)
    {
        RemoveScrollIndicatorArrowPair(gUnknown_0203CE54->unk81E);
        gUnknown_0203CE54->unk81E = 0xFF;
    }
    sub_81AB89C();
}

void bag_menu_add_list_scroll_arrow_indicators_maybe(void)
{
    if (gUnknown_0203CE54->unk81B != 1 && gUnknown_0203CE54->unk81F == 0xFF)
        gUnknown_0203CE54->unk81F = AddScrollIndicatorArrowPair(&gUnknown_08614094, &gUnknown_0203CE5E);
}

void sub_81AB89C(void)
{
    if (gUnknown_0203CE54->unk81F != 0xFF)
    {
        RemoveScrollIndicatorArrowPair(gUnknown_0203CE54->unk81F);
        gUnknown_0203CE54->unk81F = 0xFF;
    }
}

void free_bag_item_list_buffers(void)
{
    Free(gUnknown_0203CE78);
    Free(gUnknown_0203CE74);
    FreeAllWindowBuffers();
    Free(gUnknown_0203CE54);
}

void unknown_ItemMenu_Confirm(u8 taskId)
{
    BeginNormalPaletteFade(-1, 0, 0, 16, 0);
    gTasks[taskId].func = task_close_bag_menu_2;
}

void task_close_bag_menu_2(u8 taskId)
{
    s16* data = gTasks[taskId].data;
    if (!gPaletteFade.active)
    {
        sub_81AE6C8(data[0], &gUnknown_0203CE58.unk12[gUnknown_0203CE58.pocket], &gUnknown_0203CE58.unk8[gUnknown_0203CE58.pocket]);
        if (gUnknown_0203CE54->unk0 != 0)
            SetMainCallback2(gUnknown_0203CE54->unk0);
        else
            SetMainCallback2(gUnknown_0203CE58.func);
        sub_81AB824();
        ResetSpriteData();
        FreeAllSpritePalettes();
        free_bag_item_list_buffers();
        DestroyTask(taskId);
    }
}

void sub_81AB9A8(u8 pocketId)
{
    u16 i;
    struct BagPocket *pocket = &gBagPockets[pocketId];
    switch (pocketId)
    {
        case 2:
        case 3:
            sub_80D6FB4(pocket);
            break;
        default:
            sub_80D6F64(pocket);
            break;
    }
    gUnknown_0203CE54->unk829[pocketId] = 0;
    for (i = 0; i < pocket->capacity && pocket->itemSlots[i].itemId; i++)
        gUnknown_0203CE54->unk829[pocketId]++;
    if (!gUnknown_0203CE54->unk81B_2)
        gUnknown_0203CE54->unk829[pocketId]++;
    if (gUnknown_0203CE54->unk829[pocketId] > 8)
        gUnknown_0203CE54->unk82E[pocketId] = 8;
    else
        gUnknown_0203CE54->unk82E[pocketId] = gUnknown_0203CE54->unk829[pocketId];
}

void sub_81ABA6C(void)
{
    u8 i;
    for (i = 0;i < 5;i++)
        sub_81AB9A8(i);
}

void sub_81ABA88(u8 a)
{
    sub_812225C(&gUnknown_0203CE58.unk12[a], &gUnknown_0203CE58.unk8[a], gUnknown_0203CE54->unk82E[a], gUnknown_0203CE54->unk829[a]);
}

void sub_81ABAC4(void)
{
    u8 i;
    for (i = 0;i < 5;i++)
        sub_81ABA88(i);
}

void sub_81ABAE0(void)
{
    u8 i;
    for (i = 0;i < 5;i++)
        sub_8122298(&gUnknown_0203CE58.unk12[i], &gUnknown_0203CE58.unk8[i], gUnknown_0203CE54->unk82E[i], gUnknown_0203CE54->unk829[i], 8);
}

u8 sub_81ABB2C(u8 a)
{
    return gUnknown_0203CE58.unk12[a] + gUnknown_0203CE58.unk8[a];
}

void DisplayItemMessage(u8 taskId, u8 fontId, u8 *str, void ( *callback)(u8 taskId))
{
    s16* data = gTasks[taskId].data;
    
    data[10] = AddItemMessageWindow(4);
    FillWindowPixelBuffer(data[10], 17);
    DisplayMessageAndContinueTask(taskId, data[10], 10, 13, fontId, GetPlayerTextSpeed(), str, callback);
    schedule_bg_copy_tilemap_to_vram(1);
}

void bag_menu_inits_lists_menu(u8 taskId)
{
    s16* data = gTasks[taskId].data;
    u16* ScrollPos = &gUnknown_0203CE58.unk12[gUnknown_0203CE58.pocket];
    u16* CursorPos = &gUnknown_0203CE58.unk8[gUnknown_0203CE58.pocket];
    bag_menu_RemoveBagItem_message_window(4);
    sub_81AE6C8(data[0], ScrollPos, CursorPos);
    sub_81AB9A8(gUnknown_0203CE58.pocket);
    sub_81ABA88(gUnknown_0203CE58.pocket);
    load_bag_item_list_buffers(gUnknown_0203CE58.pocket);
    data[0] = ListMenuInit(&gMultiuseListMenuTemplate, *ScrollPos, *CursorPos);
    schedule_bg_copy_tilemap_to_vram(0);
    set_callback3_to_bag(taskId);
}

void sub_81ABC3C(u8 a)
{
    sub_81ABC54(bag_menu_add_window(a), 1);
}

void sub_81ABC54(u8 a, s16 b)
{
    u8 r3 = (gUnknown_0203CE58.pocket == 3) ? 3 : 2;
    ConvertIntToDecimalStringN(gStringVar1, b, 2, r3);
    StringExpandPlaceholders(gStringVar4, gText_xVar1);
    PrintTextOnWindow(a, 1, gStringVar4, GetStringCenterAlignXOffset(1, gStringVar4, 0x28), 2, 0, 0);
}

void sub_81ABCC0(int a, int b, int c)
{
    u8 r3 = (gUnknown_0203CE58.pocket == 3) ? 3 : 2;
    ConvertIntToDecimalStringN(gStringVar1, b, 2, r3);
    StringExpandPlaceholders(gStringVar4, gText_xVar1);
    PrintTextOnWindow(a, 1, gStringVar4, 0, 1, -1, 0);
    PrintMoneyAmount(a, 0x26, 1, c, 0);
}

void Task_BagMenu(u8 taskId)
{
    s16* data = gTasks[taskId].data;
    u16* ScrollPos = &gUnknown_0203CE58.unk12[gUnknown_0203CE58.pocket];
    u16* CursorPos = &gUnknown_0203CE58.unk8[gUnknown_0203CE58.pocket];
    u16 select;
    if (sub_81221EC() != TRUE && !gPaletteFade.active)
    {
        switch (GetSwitchBagPocketDirection())
        {
            case 1:
                SwitchBagPocket(taskId, -1, 0);
                return;
            case 2:
                SwitchBagPocket(taskId, 1, 0);
                return;
        }
        if ((select = (gMain.newKeys & SELECT_BUTTON)))
        {
            if (sub_81AC2C0() == 1)
            {
                sub_81AE860(data[0], ScrollPos, CursorPos);
                if ((*ScrollPos + *CursorPos) != gUnknown_0203CE54->unk829[gUnknown_0203CE58.pocket] - 1)
                {
                    PlaySE(SE_SELECT);
                    bag_menu_swap_items(taskId);
                }
            }
            return;
        }
        else
        {
            int r4 = ListMenuHandleInputGetItemId(data[0]);
            sub_81AE860(data[0], ScrollPos, CursorPos);
            switch (r4)
            {
                case -1:
                    break;
                case -2:
                    if (gUnknown_0203CE58.unk4 == 5)
                    {
                        PlaySE(SE_HAZURE);
                        break;
                    }
                    PlaySE(SE_SELECT);
                    gSpecialVar_ItemId = select;
                    gTasks[taskId].func = unknown_ItemMenu_Confirm;
                    break;
                default:
                    PlaySE(SE_SELECT);
                    sub_81AB824();
                    bag_menu_print_cursor_(data[0], 2);
                    data[1] = r4;
                    data[2] = BagGetQuantityByPocketPosition(gUnknown_0203CE58.pocket + 1, r4);
                    gSpecialVar_ItemId = BagGetItemIdByPocketPosition(gUnknown_0203CE58.pocket + 1, r4);
                    gUnknown_08614054[gUnknown_0203CE58.unk4](taskId);
            }
        }
    }
}

void set_callback3_to_bag(u8 taskId)
{
    bag_menu_add_pocket_scroll_arrow_indicators_maybe();
    bag_menu_add_list_scroll_arrow_indicators_maybe();
    ClearWindowTilemap(3);
    ClearWindowTilemap(4);
    PutWindowTilemap(1);
    schedule_bg_copy_tilemap_to_vram(0);
    gTasks[taskId].func = Task_BagMenu;
}