// Includes
#include "global.h"
#include "link.h"
#include "librfu.h"
#include "link_rfu.h"

// Static type declarations

struct UnkRfuStruct_1 gUnknown_03004140;

// Static RAM declarations
IWRAM_DATA u8 gUnknown_03000D74;
ALIGNED(4) IWRAM_DATA u8 gUnknown_03000D78[8];
IWRAM_DATA u8 gUnknown_03000D80[16];
IWRAM_DATA u16 gUnknown_03000D90[8];

// Static ROM declarations

void sub_800C000(void);
void sub_800CEB0(u16 unk0);
void sub_800C7B4(u16 unk0, u16 unk1);
void sub_800D30C(u8 a0, u8 a1);
void sub_800D610(void);

// .rodata

// .text

u32 sub_800BEC0(void)
{
    u32 r4;

    r4 = rfu_REQBN_softReset_and_checkID();
    if (r4 == 0x8001)
    {
        gUnknown_03004140.unk_08 = 1;
    }
    if (gUnknown_03004140.unk_04 != 0x17 && gUnknown_03004140.unk_04 != 0x01)
    {
        gUnknown_03004140.unk_05 = 0;
        gUnknown_03004140.unk_04 = 0;
    }
    gUnknown_03004140.unk_07 = 0;
    gUnknown_03004140.unk_0d = 0;
    gUnknown_03004140.unk_01 = 0;
    gUnknown_03004140.unk_00 = 0;
    gUnknown_03004140.unk_06 = -1;
    sub_800D610();
    return r4;
}

void rfu_REQ_sendData_wrapper(u8 r2)
{
    u8 val;
    if (!gUnknown_03007890->unk_00)
    {
        val = gUnknown_03004140.unk_02;
        r2 = 0;
        if (val == 1)
        {
            r2 = 1;
        }
    }
    else
    {
        gUnknown_03004140.unk_03 = 0;
    }
    rfu_REQ_sendData(r2);
}

int sub_800BF4C(void (*func1)(u8), void (*func2)(void))
{
    if (func1 == NULL)
    {
        return 4;
    }
    CpuFill16(0, &gUnknown_03004140, sizeof(gUnknown_03004140));
    gUnknown_03004140.unk_06 = -1;
    gUnknown_03004140.unk_40 = func1;
    gUnknown_03004140.unk_44 = func2;
    rfu_setMSCCallback(sub_800CEB0);
    rfu_setREQCallback(sub_800C7B4);
    return 0;
}

void sub_800BFA0(void)
{
    CpuFill16(0, &gUnknown_03004140, sizeof(gUnknown_03004140) - 2 * sizeof(void *));
    gUnknown_03004140.unk_06 = -1;
}

void sub_800BFCC(struct UnkLinkRfuStruct_02022B2C *unk0)
{
    sub_800C000();
    gUnknown_03004140.unk_04 = 1;
    gUnknown_03004140.unk_05 = 2;
    gUnknown_03004140.unk_3c = unk0;
    gUnknown_03004140.unk_09 = unk0->unk_11;
    gUnknown_03004140.unk_32 = unk0->unk_12;
    gUnknown_03004140.unk_18 = unk0->unk_14;
    if (unk0->unk_10)
    {
        gUnknown_03004140.unk_0b = 1;
    }
}

void sub_800C000(void)
{
    u8 i;

    gUnknown_03004140.unk_05 = 0;
    gUnknown_03004140.unk_04 = 0;
    gUnknown_03004140.unk_06 = -1;
    gUnknown_03004140.unk_07 = 0;
    gUnknown_03004140.unk_10 = 0;
    gUnknown_03004140.unk_0c = 0;
    gUnknown_03004140.unk_24 = 0;
    gUnknown_03004140.unk_30 = 0;
    for (i = 0; i < 4; i++)
    {
        gUnknown_03004140.unk_28[i] = 0;
        gUnknown_03004140.unk_34[i] = 0;
    }
}

void sub_800C048(void)
{
    gUnknown_03004140.unk_04 = 0x15;
}

u8 sub_800C054(u8 r5, u16 r7, u16 r8, u16 *r6)
{
    u8 i;
    u16 *buffer;

    if (gUnknown_03004140.unk_04 != 0 && (gUnknown_03004140.unk_04 != 0x08 || r5 != 1))
    {
        gUnknown_03004140.unk_14 = 1;
        sub_800D30C(0xf3, 0x01);
        return 1;
    }
    if (!rfu_getMasterSlave())
    {
        gUnknown_03004140.unk_14 = 2;
        sub_800D30C(0xf3, 0x01);
        return 2;
    }
    for (i = 0, buffer = r6; i < 16; i++)
    {
        if (*buffer++ == 0xFFFF)
        {
            break;
        }
    }
    if (i == 16)
    {
        gUnknown_03004140.unk_14 = 4;
        sub_800D30C(0xf3, 0x01);
        return 4;
    }
    if (r5 > 1)
    {
        gUnknown_03004140.unk_07 = 1;
        r5 = 1;
        r7 = 0;
    }
    else
    {
        gUnknown_03004140.unk_07 = 0;
    }
    if (r5 != 0)
    {
        gUnknown_03004140.unk_04 = 5;
    }
    else
    {
        gUnknown_03004140.unk_04 = 9;
        if (gUnknown_03004140.unk_0b)
        {
            gUnknown_03004140.unk_0b = 2;
        }
    }
    gUnknown_03004140.unk_06 = r5;
    gUnknown_03004140.unk_1a = r7;
    gUnknown_03004140.unk_26 = r8;
    gUnknown_03004140.unk_20 = r6;
    return 0;
}