#pragma once
#include "reg.hpp"

#include <stdint.h>

#include "driver/gpio.h"
#include "driver/spi_master.h"

bool dummy_function(bool flag);


enum MCP2521_RX_BUFFER {
    RXB0 = 0,
    RXB1 = 1
};

enum MCP2521_TX_BUFFER {
    TXB0 = 0,
    TXB1 = 1,
    TXB2 = 2
};

enum MCP2521_BUFFER_TYPE {
    ID = 0,
    DATA = 1
};

class MCP2521_SPI_Interface {
private:
    char spi_rx_buffer[32];
    char spi_tx_buffer[32];

    spi_bus_config_t * spi_bus_config;
    spi_device_interface_config_t spi_device_config;
    spi_device_handle_t spi_device_handle;

public:
    spi_bus_config_t * getSPI_bus_config();

    MCP2521_SPI_Interface(
        spi_host_device_t spi_host,
        spi_bus_config_t *bus_config,
        gpio_num_t mosi, 
        gpio_num_t miso, 
        gpio_num_t sclk, 
        gpio_num_t cs, 
        gpio_num_t int_pin
    );
    MCP2521_SPI_Interface(
        spi_host_device_t spi_host,
        spi_bus_config_t *bus_config,
        gpio_num_t cs, 
        gpio_num_t int_pin
    );

    ~MCP2521_SPI_Interface();

    static void initSPIBus(
        spi_host_device_t spi_host,
        gpio_num_t mosi, 
        gpio_num_t miso, 
        gpio_num_t sclk, 
        spi_bus_config_t *bus_config
    );

    void initSPIDevice(
        spi_host_device_t spi_host,
        gpio_num_t cs
    );

    void deinitSPI();

    void initPins(
        gpio_num_t int_pin
    );
    void deinitPins();

    void reset();
    
    void read_reg(uint8_t address, uint8_t *data, size_t length);
    uint8_t read_reg(uint8_t address);

    void read_rx_buf(MCP2521_RX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length);
    
    void write_reg(uint8_t address, uint8_t *data, size_t length);
    void write_reg(uint8_t address, uint8_t data);

    void write_tx_buf(MCP2521_TX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length);

    void request_to_send(bool txb2, bool txb1, bool txb0);
    void request_to_send(MCP2521_TX_BUFFER buffer);

    uint8_t read_status();
    uint8_t read_rx_status();

    void bit_modify(uint8_t address, uint8_t mask, uint8_t data);
};