#ifndef GUARD_GBA_TYPES_H
#define GUARD_GBA_TYPES_H

#include <stdint.h>

typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef int8_t s8;
typedef int16_t s16;
typedef int32_t s32;
typedef int64_t s64;

typedef volatile u8 vu8;
typedef volatile u16 vu16;
typedef volatile u32 vu32;
typedef volatile u64 vu64;
typedef volatile s8 vs8;
typedef volatile s16 vs16;
typedef volatile s32 vs32;
typedef volatile s64 vs64;

typedef float f32;
typedef double f64;

typedef u8 bool8;
typedef u16 bool16;
typedef u32 bool32;

struct BgCnt {
    u16 priority : 2;
    u16 charBaseBlock : 2;
    u16 dummy : 2;
    u16 mosaic : 1;
    u16 palettes : 1;
    u16 screenBaseBlock : 5;
    u16 areaOverflowMode : 1;
    u16 screenSize : 2;
};
typedef volatile struct BgCnt vBgCnt;

struct PlttData {
    u16 r : 5; // red
    u16 g : 5; // green
    u16 b : 5; // blue
    u16 unused_15 : 1;
};

struct OamData {
    /*0x00*/ u32 y : 8;
    /*0x01*/ u32 affineMode : 2; // 0x1, 0x2 -> 0x4
    u32 objMode : 2;             // 0x4, 0x8 -> 0xC
    u32 mosaic : 1;              // 0x10
    u32 bpp : 1;                 // 0x20
    u32 shape : 2;               // 0x40, 0x80 -> 0xC0

    /*0x02*/ u32 x : 9;
    u32 matrixNum : 5; // bits 3/4 are h-flip/v-flip if not in affine mode
    u32 size : 2;      // 0x4000, 0x8000 -> 0xC000

    /*0x04*/ u16 tileNum : 10; // 0x3FF
    u16 priority : 2;          // 0x400, 0x800 -> 0xC00
    u16 paletteNum : 4;
    /*0x06*/ u16 affineParam;
};

#define ST_OAM_HFLIP 0x08
#define ST_OAM_VFLIP 0x10
#define ST_OAM_MNUM_FLIP_MASK 0x18

#define ST_OAM_OBJ_NORMAL 0
#define ST_OAM_OBJ_BLEND 1
#define ST_OAM_OBJ_WINDOW 2

#define ST_OAM_AFFINE_OFF 0
#define ST_OAM_AFFINE_NORMAL 1
#define ST_OAM_AFFINE_ERASE 2
#define ST_OAM_AFFINE_DOUBLE 3

#define ST_OAM_AFFINE_ON_MASK 1
#define ST_OAM_AFFINE_DOUBLE_MASK 2

#define ST_OAM_4BPP 0
#define ST_OAM_8BPP 1

#define ST_OAM_SQUARE 0
#define ST_OAM_H_RECTANGLE 1
#define ST_OAM_V_RECTANGLE 2

#define ST_OAM_SIZE_0 0
#define ST_OAM_SIZE_1 1
#define ST_OAM_SIZE_2 2
#define ST_OAM_SIZE_3 3

#define SPRITE_SIZE_8x8 ((ST_OAM_SIZE_0 << 2) | (ST_OAM_SQUARE))
#define SPRITE_SIZE_16x16 ((ST_OAM_SIZE_1 << 2) | (ST_OAM_SQUARE))
#define SPRITE_SIZE_32x32 ((ST_OAM_SIZE_2 << 2) | (ST_OAM_SQUARE))
#define SPRITE_SIZE_64x64 ((ST_OAM_SIZE_3 << 2) | (ST_OAM_SQUARE))

#define SPRITE_SIZE_16x8 ((ST_OAM_SIZE_0 << 2) | (ST_OAM_H_RECTANGLE))
#define SPRITE_SIZE_32x8 ((ST_OAM_SIZE_1 << 2) | (ST_OAM_H_RECTANGLE))
#define SPRITE_SIZE_32x16 ((ST_OAM_SIZE_2 << 2) | (ST_OAM_H_RECTANGLE))
#define SPRITE_SIZE_64x32 ((ST_OAM_SIZE_3 << 2) | (ST_OAM_H_RECTANGLE))

#define SPRITE_SIZE_8x16 ((ST_OAM_SIZE_0 << 2) | (ST_OAM_V_RECTANGLE))
#define SPRITE_SIZE_8x32 ((ST_OAM_SIZE_1 << 2) | (ST_OAM_V_RECTANGLE))
#define SPRITE_SIZE_16x32 ((ST_OAM_SIZE_2 << 2) | (ST_OAM_V_RECTANGLE))
#define SPRITE_SIZE_32x64 ((ST_OAM_SIZE_3 << 2) | (ST_OAM_V_RECTANGLE))

#define SPRITE_SIZE(dim) ((SPRITE_SIZE_##dim >> 2) & 0x03)
#define SPRITE_SHAPE(dim) (SPRITE_SIZE_##dim & 0x03)

struct BgAffineSrcData {
    s32 texX;
    s32 texY;
    s16 scrX;
    s16 scrY;
    s16 sx;
    s16 sy;
    u16 alpha;
};

struct BgAffineDstData {
    s16 pa;
    s16 pb;
    s16 pc;
    s16 pd;
    s32 dx;
    s32 dy;
};

struct ObjAffineSrcData {
    s16 xScale;
    s16 yScale;
    u16 rotation;
};

// Normal SIO Control Structure
struct SioNormalCnt {
    u16 sck_I_O : 1; // Clock I/O Select
    u16 sck : 1;     // Internal Clock Select
    u16 ackRecv : 1; // Transfer Enable Flag Receive
    u16 ackSend : 1; // Transfer Enable Flag Send
    u16 unused_6_4 : 3;
    u16 enable : 1; // SIO Enable
    u16 unused_11_8 : 4;
    u16 mode : 2;     // Communication Mode Select
    u16 ifEnable : 1; // Interrupt Request Enable
    u16 unused_15 : 1;
    u8 data; // Data
    u8 unused_31_24;
};

#define ST_SIO_8BIT_MODE 0  // Normal 8-bit communication mode
#define ST_SIO_32BIT_MODE 1 // Normal 32-bit communication mode

#define ST_SIO_SCK_OUT 0     // Select external clock
#define ST_SIO_SCK_IN 1      // Select internal clock
#define ST_SIO_IN_SCK_256K 0 // Select internal clock 256KHz
#define ST_SIO_IN_SCK_2M 1   //                  Select 2MHz

// Multi-player SIO Control Structure
struct SioMultiCnt {
    u16 baudRate : 2; // baud rate
    u16 si : 1;       // SI terminal
    u16 sd : 1;       // SD terminal
    u16 id : 2;       // ID
    u16 error : 1;    // error flag
    u16 enable : 1;   // SIO enable
    u16 unused_11_8 : 4;
    u16 mode : 2;     // communication mode (should equal 2)
    u16 ifEnable : 1; // IRQ enable
    u16 unused_15 : 1;
    u16 data; // data
};

#define ST_SIO_MULTI_MODE 2 // Multi-play communication mode

#define ST_SIO_9600_BPS 0     // Baud rate 9600 bps
#define ST_SIO_38400_BPS 1    //          38400 bps
#define ST_SIO_57600_BPS 2    //          57600 bps
#define ST_SIO_115200_BPS 3   //         115200 bps
#define ST_SIO_MULTI_PARENT 1 // Multi-play communication  Connect master
#define ST_SIO_MULTI_CHILD 0  //                  Connect slave

// UART - SIO Control Structure
struct SioUartCnt {
    u16 baudRate : 2;      // Baud Rate
    u16 ctsEnable : 1;     // Send Signal Enable
    u16 paritySelect : 1;  // Parity Even/Odd
    u16 transDataFull : 1; // Transmit Data Full
    u16 recvDataEmpty : 1; // Receive Data Empty
    u16 error : 1;         // Error Detect
    u16 length : 1;        // Data Length
    u16 fifoEnable : 1;    // FIFO Enable
    u16 parityEnable : 1;  // Parity Enable
    u16 transEnable : 1;   // Transmitter Enable
    u16 recvEnable : 1;    // Receiver Enable
    u16 mode : 2;          // Communication Mode Select
    u16 ifEnable : 1;      // Interrupt Request Enable
    u16 unused_15 : 1;
    u8 data; // Data
    u8 unused_31_24;
};

#define ST_SIO_UART_MODE 3 // UART communication mode

#define ST_SIO_UART_7BIT 0   // UART communication data length 7 bits
#define ST_SIO_UART_8BIT 1   //                       8 bits
#define ST_SIO_PARITY_EVEN 0 // Even parity
#define ST_SIO_PARITY_ODD 1  // Odd parity

// JOY Bus Communication Control Structure
struct JoyCnt {
    u8 ifReset : 1; // JOY Bus Reset Interrupt Request
    u8 ifRecv : 1;  // JOY Bus Received Interrupt Request
    u8 ifSend : 1;  // JOY Bus Sent Interrupt Request
    u8 unused_5_3 : 3;
    u8 ifEnable : 1; // Interrupt Request Enable
    u8 unused_7 : 1;
};

// JOY Bus Communication Status Structure
struct JoyStat {
    u8 unused_0 : 1;
    u8 recv : 1; // Receive Status
    u8 unused_2 : 1;
    u8 send : 1;  // Send Status
    u8 flags : 2; // General Flag
    u8 unused_7_6 : 2;
};

// General Input/Output Control Structure
struct RCnt {
    u8 sc : 1; // Data
    u8 sd : 1;
    u8 si : 1;
    u8 so : 1;
    u8 sc_i_o : 1; // I/O Select
    u8 sd_i_o : 1;
    u8 si_i_o : 1;
    u8 so_i_o : 1;
    u8 ifEnable : 1; // Interrupt Request Enable
    u8 unused_13_9 : 5;
    u8 sioModeMaster : 2; // SIO Mode Master
};

#define ST_R_SIO_MASTER_MODE 0 // SIO master mode
#define ST_R_DIRECT_MODE 2     // General input/output communication mode
#define ST_R_JOY_MODE 3        // JOY communication mode

#define ST_R_IN 0  // Select input
#define ST_R_OUT 1 // Select output

#endif // GUARD_GBA_TYPES_H
