#pragma once

#include "common.h"
#include "nand.h"

#define AGBSAVE_MAGIC       '.', 'S', 'A', 'V'
#define AGBSAVE_MAX_SIZE    (0x000180 * 0x200) // standard size of the NAND partition
#define AGBSAVE_MAX_SSIZE   (AGBSAVE_MAX_SIZE - sizeof(AgbSaveHeader))

// see: http://3dbrew.org/wiki/3DS_Virtual_Console#GBA_VC
#define GBASAVE_EEPROM_512  (512)
#define GBASAVE_EEPROM_8K   (8 * 1024)
#define GBASAVE_SRAM_32K    (32 * 1024)
#define GBASAVE_FLASH_64K   (64 * 1024)
#define GBASAVE_FLASH_128K  (128 * 1024)
#define GBASAVE_VALID(size) \
   (((size) == GBASAVE_EEPROM_512) || \
    ((size) == GBASAVE_EEPROM_8K)  || \
    ((size) == GBASAVE_SRAM_32K)   || \
    ((size) == GBASAVE_FLASH_64K)  || \
    ((size) == GBASAVE_FLASH_128K))

// see: http://3dbrew.org/wiki/3DS_Virtual_Console#NAND_Savegame
typedef struct {
    u8  magic[4]; // ".SAV"
    u8  reserved0[0xC]; // always 0xFF
    u8  cmac[0x10];
    u8  reserved1[0x10]; // always 0xFF
    u32 unknown0; // always 0x01
    u32 times_saved;
    u64 title_id;
    u8  sd_cid[0x10];
    u32 save_start; // always 0x200
    u32 save_size;
    u8  reserved2[0x8]; // always 0xFF
    u32 unknown1; // has to do with ARM7?
    u32 unknown2; // has to do with ARM7?
    u8  reserved3[0x198]; // always 0xFF
} __attribute__((packed)) AgbSaveHeader;

u32 ValidateAgbSaveHeader(AgbSaveHeader* header);