// Includes
#include "global.h"
#include "main.h"
#include "region_map.h"
#include "menu.h"
#include "palette.h"
#include "bg.h"

// Static type declarations

struct UnkStruct_0203A148 {
    u8 filler_000[0xa74];
};

// Static RAM declarations

EWRAM_DATA struct RegionMap *gUnknown_0203A144 = NULL;
EWRAM_DATA struct UnkStruct_0203A148 *gUnknown_0203A148 = NULL;

// Static ROM declarations

u8 sub_81230C4(void);
u8 sub_8123254(void);
void sub_81236C4(s32 a0, s32 a1, s32 a2, s32 a3, u16 a4, u16 a5, u16 a6);
void sub_81237B4(void);
void sub_81238AC(void);
u8 get_flagnr_blue_points(u16 mapSecId);
u16 sub_8123EB4(u16 mapSecId);
void sub_8123FB0(void);
u8 _swiopen(void);
u8 sub_8123334(void);
u16 sub_812386C(u16 x, u16 y);
void sub_812378C(s16 x, s16 y);

// .rodata

extern const u8 gUnknown_0859F77C[];
extern const u8 gUnknown_085A04E0[];
extern const u16 gUnknown_0859F73C[];
extern const u8 gUnknown_0859F60C[];
extern const u8 gUnknown_0859F650[];

// .text

void sub_8122CDC(struct RegionMap *regionMap, u8 argument)
{
    sub_8122CF8(regionMap, NULL, argument);
    while (sub_8122DB0());
}

void sub_8122CF8(struct RegionMap *regionMap, struct UnkStruct_8122CF8 *arg1, u8 arg2)
{
    gUnknown_0203A144 = regionMap;
    gUnknown_0203A144->initStep = 0;
    gUnknown_0203A144->zoomed = arg2;
    gUnknown_0203A144->inputCallback = arg2 == TRUE ? sub_8123254 : sub_81230C4;
    if (arg1 != NULL)
    {
        gUnknown_0203A144->bgNum = arg1->unk_0_0;
        gUnknown_0203A144->unk_081 = arg1->unk_0_2;
        gUnknown_0203A144->unk_082 = arg1->unk_0_4;
        gUnknown_0203A144->unk_083 = TRUE;
    }
    else
    {
        gUnknown_0203A144->bgNum = 2;
        gUnknown_0203A144->unk_081 = 2;
        gUnknown_0203A144->unk_082 = 28;
        gUnknown_0203A144->unk_083 = FALSE;
    }
}

void sub_8122D88(struct RegionMap *regionMap)
{
    gUnknown_0203A144 = regionMap;
    sub_81238AC();
    gUnknown_0203A144->unk_074 = gUnknown_0203A144->cursorPosX;
    gUnknown_0203A144->unk_076 = gUnknown_0203A144->cursorPosY;
}

bool8 sub_8122DB0(void)
{
    switch (gUnknown_0203A144->initStep)
    {
        case 0:
            if (gUnknown_0203A144->unk_083)
            {
                decompress_and_copy_tile_data_to_vram(gUnknown_0203A144->bgNum, gUnknown_0859F77C, 0, 0, 0);
            }
            else
            {
                LZ77UnCompVram(gUnknown_0859F77C, (u16 *)BG_SCREEN_ADDR(16));
            }
            break;
        case 1:
            if (gUnknown_0203A144->unk_083)
            {
                if (!free_temp_tile_data_buffers_if_possible())
                {
                    decompress_and_copy_tile_data_to_vram(gUnknown_0203A144->bgNum, gUnknown_085A04E0, 0, 0, 1);
                }
            }
            else
            {
                LZ77UnCompVram(gUnknown_085A04E0, (u16 *)BG_SCREEN_ADDR(28));
            }
            break;
        case 2:
            if (!free_temp_tile_data_buffers_if_possible())
            {
                LoadPalette(gUnknown_0859F73C, 0x70, 0x60);
            }
            break;
        case 3:
            LZ77UnCompWram(gUnknown_0859F60C, gUnknown_0203A144->cursorSmallImage);
            break;
        case 4:
            LZ77UnCompWram(gUnknown_0859F650, gUnknown_0203A144->cursorLargeImage);
            break;
        case 5:
            sub_81238AC();
            gUnknown_0203A144->unk_074 = gUnknown_0203A144->cursorPosX;
            gUnknown_0203A144->unk_076 = gUnknown_0203A144->cursorPosY;
            gUnknown_0203A144->mapSecId = sub_8123EB4(gUnknown_0203A144->mapSecId);
            gUnknown_0203A144->unk_002 = get_flagnr_blue_points(gUnknown_0203A144->mapSecId);
            GetMapName(gUnknown_0203A144->mapSecName, gUnknown_0203A144->mapSecId, 16);
            break;
        case 6:
            if (gUnknown_0203A144->zoomed == FALSE)
            {
                sub_81236C4(0, 0, 0, 0, 0x100, 0x100, 0);
            }
            else
            {
                gUnknown_0203A144->scrollX = gUnknown_0203A144->cursorPosX * 8 - 0x34;
                gUnknown_0203A144->scrollY = gUnknown_0203A144->cursorPosY * 8 - 0x44;
                gUnknown_0203A144->unk_064 = gUnknown_0203A144->cursorPosX;
                gUnknown_0203A144->unk_066 = gUnknown_0203A144->cursorPosY;
                sub_81236C4(gUnknown_0203A144->scrollX, gUnknown_0203A144->scrollY, 0x38, 0x48, 0x80, 0x80, 0);
            }
            break;
        case 7:
            sub_8123FB0();
            sub_81237B4();
            gUnknown_0203A144->cursorSprite = NULL;
            gUnknown_0203A144->playerIconSprite = NULL;
            gUnknown_0203A144->cursorMovementFrameCounter = 0;
            gUnknown_0203A144->blinkPlayerIcon = FALSE;
            if (gUnknown_0203A144->unk_083)
            {
                SetBgAttribute(gUnknown_0203A144->bgNum, BG_CTRL_ATTR_MAPBASEINDEX, 2);
                SetBgAttribute(gUnknown_0203A144->bgNum, BG_CTRL_ATTR_VISIBLE, gUnknown_0203A144->unk_081);
                SetBgAttribute(gUnknown_0203A144->bgNum, BG_CTRL_ATTR_CHARBASEINDEX, gUnknown_0203A144->unk_082);
                SetBgAttribute(gUnknown_0203A144->bgNum, BG_CTRL_ATTR_PRIORITY, 1);
                SetBgAttribute(gUnknown_0203A144->bgNum, BG_CTRL_ATTR_SCREENSIZE, 1);
            }
            gUnknown_0203A144->initStep ++;
            return FALSE;
        default:
            return FALSE;
    }
    gUnknown_0203A144->initStep ++;
    return TRUE;
}

void sub_8123030(u16 a0, u32 a1)
{
    BlendPalettes(0x380, a1, a0);
    CpuCopy16(gPlttBufferFaded + 0x70, gPlttBufferUnfaded + 0x70, 0x60);
}

void sub_812305C(void)
{
    if (gUnknown_0203A144->cursorSprite != NULL)
    {
        DestroySprite(gUnknown_0203A144->cursorSprite);
        FreeSpriteTilesByTag(gUnknown_0203A144->cursorTileTag);
        FreeSpritePaletteByTag(gUnknown_0203A144->cursorPaletteTag);
    }
    if (gUnknown_0203A144->playerIconSprite != NULL)
    {
        DestroySprite(gUnknown_0203A144->playerIconSprite);
        FreeSpriteTilesByTag(gUnknown_0203A144->playerIconTileTag);
        FreeSpritePaletteByTag(gUnknown_0203A144->playerIconPaletteTag);
    }
}

u8 sub_81230AC(void)
{
    return gUnknown_0203A144->inputCallback();
}

u8 sub_81230C4(void)
{
    u8 input;

    input = INPUT_EVENT_NONE;
    gUnknown_0203A144->cursorDeltaX = 0;
    gUnknown_0203A144->cursorDeltaY = 0;
    if (gMain.heldKeys & DPAD_UP && gUnknown_0203A144->cursorPosY > 2)
    {
        gUnknown_0203A144->cursorDeltaY = -1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_DOWN && gUnknown_0203A144->cursorPosY < 16)
    {
        gUnknown_0203A144->cursorDeltaY = +1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_LEFT && gUnknown_0203A144->cursorPosX > 1)
    {
        gUnknown_0203A144->cursorDeltaX = -1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_RIGHT && gUnknown_0203A144->cursorPosX < 28)
    {
        gUnknown_0203A144->cursorDeltaX = +1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.newKeys & A_BUTTON)
    {
        input = INPUT_EVENT_A_BUTTON;
    }
    else if (gMain.newKeys & B_BUTTON)
    {
        input = INPUT_EVENT_B_BUTTON;
    }
    if (input == INPUT_EVENT_MOVE_START)
    {
        gUnknown_0203A144->cursorMovementFrameCounter = 4;
        gUnknown_0203A144->inputCallback = _swiopen;
    }
    return input;
}

u8 _swiopen(void)
{
    u16 mapSecId;

    if (gUnknown_0203A144->cursorMovementFrameCounter != 0)
    {
        return INPUT_EVENT_MOVE_CONT;
    }
    if (gUnknown_0203A144->cursorDeltaX > 0)
    {
        gUnknown_0203A144->cursorPosX ++;
    }
    if (gUnknown_0203A144->cursorDeltaX < 0)
    {
        gUnknown_0203A144->cursorPosX --;
    }
    if (gUnknown_0203A144->cursorDeltaY > 0)
    {
        gUnknown_0203A144->cursorPosY ++;
    }
    if (gUnknown_0203A144->cursorDeltaY < 0)
    {
        gUnknown_0203A144->cursorPosY --;
    }
    mapSecId = sub_812386C(gUnknown_0203A144->cursorPosX, gUnknown_0203A144->cursorPosY);
    gUnknown_0203A144->unk_002 = get_flagnr_blue_points(mapSecId);
    if (mapSecId != gUnknown_0203A144->mapSecId)
    {
        gUnknown_0203A144->mapSecId = mapSecId;
        GetMapName(gUnknown_0203A144->mapSecName, gUnknown_0203A144->mapSecId, 16);
    }
    sub_8123FB0();
    gUnknown_0203A144->inputCallback = sub_81230C4;
    return INPUT_EVENT_MOVE_END;
}

u8 sub_8123254(void)
{
    u8 input;

    input = INPUT_EVENT_NONE;
    gUnknown_0203A144->zoomedCursorDeltaX = 0;
    gUnknown_0203A144->zoomedCursorDeltaY = 0;
    if (gMain.heldKeys & DPAD_UP && gUnknown_0203A144->scrollY > -0x34)
    {
        gUnknown_0203A144->zoomedCursorDeltaY = -1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_DOWN && gUnknown_0203A144->scrollY < 0x3c)
    {
        gUnknown_0203A144->zoomedCursorDeltaY = +1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_LEFT && gUnknown_0203A144->scrollX > -0x2c)
    {
        gUnknown_0203A144->zoomedCursorDeltaX = -1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.heldKeys & DPAD_RIGHT && gUnknown_0203A144->scrollX < 0xac)
    {
        gUnknown_0203A144->zoomedCursorDeltaX = +1;
        input = INPUT_EVENT_MOVE_START;
    }
    if (gMain.newKeys & A_BUTTON)
    {
        input = INPUT_EVENT_A_BUTTON;
    }
    if (gMain.newKeys & B_BUTTON)
    {
        input = INPUT_EVENT_B_BUTTON;
    }
    if (input == INPUT_EVENT_MOVE_START)
    {
        gUnknown_0203A144->inputCallback = sub_8123334;
        gUnknown_0203A144->zoomedCursorMovementFrameCounter = 0;
    }
    return input;
}

u8 sub_8123334(void)
{
    u16 x;
    u16 y;
    u16 mapSecId;

    gUnknown_0203A144->scrollY += gUnknown_0203A144->zoomedCursorDeltaY;
    gUnknown_0203A144->scrollX += gUnknown_0203A144->zoomedCursorDeltaX;
    sub_812378C(gUnknown_0203A144->scrollX, gUnknown_0203A144->scrollY);
    gUnknown_0203A144->zoomedCursorMovementFrameCounter ++;
    if (gUnknown_0203A144->zoomedCursorMovementFrameCounter == 8)
    {
        x = (gUnknown_0203A144->scrollX + 0x2c) / 8 + 1;
        y = (gUnknown_0203A144->scrollY + 0x34) / 8 + 2;
        if (x != gUnknown_0203A144->unk_064 || y != gUnknown_0203A144->unk_066)
        {
            gUnknown_0203A144->unk_064 = x;
            gUnknown_0203A144->unk_066 = y;
            mapSecId = sub_812386C(x, y);
            gUnknown_0203A144->unk_002 = get_flagnr_blue_points(mapSecId);
            if (mapSecId != gUnknown_0203A144->mapSecId)
            {
                gUnknown_0203A144->mapSecId = mapSecId;
                GetMapName(gUnknown_0203A144->mapSecName, gUnknown_0203A144->mapSecId, 16);
            }
            sub_8123FB0();
        }
        gUnknown_0203A144->zoomedCursorMovementFrameCounter = 0;
        gUnknown_0203A144->inputCallback = sub_8123254;
        return INPUT_EVENT_MOVE_END;
    }
    else
    {
        return INPUT_EVENT_MOVE_CONT;
    }
}