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#ifndef CUBE_H
#define CUBE_H

// Cube Parameters
#define CUBE_ROW_COUNT 8
#define CUBE_COLUMN_COUNT 8
#define CUBE_LAYER_COUNT 8
#define CUBE_ROTATIONS 7

#define GCS_REG_SIZE 36
#define GCS_LAYER_SIZE (GCS_REG_SIZE*CUBE_ROW_COUNT)

// Color Definitions
#define RED    0x08F,0x000,0x000
#define ORANGE 0x08F,0x020,0x000
#define YELLOW 0x08F,0x08F,0x000
#define GREEN  0x000,0x08F,0x000
#define TEAL   0x000,0x08F,0x08F
#define BLUE   0x000,0x000,0x08F
#define PURPLE 0x08F,0x000,0x08F

// Control Pin Declarations
#define SFT_D_TRIS TRISBbits.TRISB15
#define SFT_S_TRIS TRISDbits.TRISD5
#define SFT_K_TRIS TRISDbits.TRISD4
#define SFT_R_TRIS TRISBbits.TRISB14

#define SFT_D PORTBbits.RB15
#define SFT_S PORTDbits.RD5
#define SFT_K PORTDbits.RD4
#define SFT_R PORTBbits.RB14

#define GSLAT_TRIS TRISDbits.TRISD9
#define XBLNK_TRIS TRISDbits.TRISD2

#define GSLAT PORTDbits.RD9
#define XBLNK PORTDbits.RD2

// String Overlay Buffer Size
#define CUBE_STRING_MAX_LENGTH 32

// Data Streaming In Buffer Size
#define CUBE_FRAME_BUFFER_SIZE 3000
#define CUBE_START_CHAR  0x7E
#define CUBE_ESCAPE_CHAR 0x7D
#define CUBE_ESCAPE_XOR  0x20

// Data Streaming In Command Set
#define CUBE_COMMAND_SET_BC         0x0A // [Brightness Value]
#define CUBE_COMMAND_CLEAR          0x0B // (no data)
#define CUBE_COMMAND_SET_PIXEL      0x10 // [Layer, Row, Column, R, G, B]
#define CUBE_COMMAND_SET_ALL        0x11 // [R1, G1, B1, R2, ...]
#define CUBE_COMMAND_START_TEXT     0x20 // [R, G, B, Char1, Char2, Char3, ...]
#define CUBE_COMMAND_STOP_TEXT      0x21 // (no data)

typedef enum {
    IDLE,
    READ_LENGTH_MSB,
    READ_LENGTH_LSB,
    READ_COMMAND,
    READ_DATA,
    READ_CHECKSUM
} PROCESS_STATE;

typedef struct {
    // Variables for base cube
    uint8_t GCS[CUBE_LAYER_COUNT][GCS_LAYER_SIZE];
    uint8_t GCS_OVERLAY[CUBE_LAYER_COUNT][GCS_LAYER_SIZE];
    uint8_t GCS_WRITE[CUBE_LAYER_COUNT][GCS_LAYER_SIZE];
    uint8_t current_layer;
    uint8_t rotation_counter;

    // Variables for the scrolling text
    uint8_t string[CUBE_STRING_MAX_LENGTH];
    uint8_t string_length;
    uint8_t string_index;
    uint8_t string_line;
    uint16_t string_R, string_G, string_B;

    // Variables for input frame data
    PROCESS_STATE frame_state;
    uint8_t frame_buffer[CUBE_FRAME_BUFFER_SIZE];
    uint8_t frame_checksum;
    uint32_t frame_length;
    uint32_t frame_index;
    uint32_t frame_command;
    uint32_t frame_escape;
} CUBE_DATA;

void Cube_Init(CUBE_DATA *data, uint8_t BC);
void Cube_Timer_Interrupt(void);

// Callbacks on completion of DCS/GCS writes
void Cube_DCS_Write_Callback(void);
void Cube_GCS_Write_Callback(void);

// Cube control functions
void Cube_Write_DCS(uint8_t BC);
void Cube_Clear(void);
void Cube_Set_All(uint16_t R, uint16_t G, uint16_t B);
void Cube_Set_Layer(uint8_t layer, uint16_t R, uint16_t G, uint16_t B);
void Cube_Set_Pixel(uint8_t layer, uint8_t row, uint8_t column, uint16_t R, uint16_t G, uint16_t B);
void Cube_Get_Pixel(uint8_t layer, uint8_t row, uint8_t column, uint16_t* R, uint16_t* G, uint16_t* B);
void Cube_Move_Pixel(uint8_t layer1, uint8_t row1, uint8_t column1, uint8_t layer2, uint8_t row2, uint8_t column2);
void Cube_Rotate_Shell(uint8_t shell, uint8_t direction);
void Cube_Rotate(uint8_t direction);

// Overlay control functions
void Cube_Overlay_Clear(void);
void Cube_Overlay_Set_Pixel(uint8_t layer, uint8_t row, uint8_t column, uint16_t R, uint16_t G, uint16_t B);
void Cube_Overlay_Get_Pixel(uint8_t layer, uint8_t row, uint8_t column, uint16_t* R, uint16_t* G, uint16_t* B);
void Cube_Overlay_Move_Pixel(uint8_t layer1, uint8_t row1, uint8_t column1, uint8_t layer2, uint8_t row2, uint8_t column2);
void Cube_Overlay_Rotate_Shell(uint8_t shell, uint8_t direction);

// Text control functions
void Cube_Text_Init(uint8_t *string, uint8_t length, uint16_t R, uint16_t G, uint16_t B);
void Cube_Text_Interrupt(void);

// Data stream in control functions
void Cube_Data_In(uint8_t c);
void Cube_Data_In_Process_Frame(void);
void Cube_Data_Direct_Write_All(uint8_t *buffer);

#endif  /* CUBE_H */