/*
 * File:   command-handler.h
 * Author: Sebastian H. Gabrielli
 *
 * Created on March 6, 2024, 12:43 PM
 */

#ifndef COMMAND_HANDLER_H
#define COMMAND_HANDLER_H

#ifdef __cplusplus
extern "C" {
#endif

#include "eeprom.h"
#include <avr/io.h>
#include <stdint.h>
#include <string.h>
#include "voltage.h"
#include "themistor-temp.h"
        
// Enum of all valid command types
typedef enum {
  WRITE_CONFIG,         // Change the configuration
  READ_CONFIG,          // Read, and print the current configuration
  READ_VOLTAGE,         // Read, and print a voltage
  READ_TERMPERATURE,    // Read, and print the temperature
  READ_FAN_SPEED,       // Read, and print the current fan speed
  READ_BULK_FAN_SPEED,  // Read, and print the stored back fan speed data
  CLEAR_BULK_FAN_SPEED, // Clear the buffer of stored fan speed data
  UNKNOWN_COMMAND       // An unrecognized command has been sent
} command_t;

// Enum of all valid voltage sources
typedef enum {
  SRC_INTERNAL,   // Internal volage
  SRC_EXTRNAL,    // External voltage
  SRC_THERMISTOR, // Thermistor voltage
  SRC_NONE        // No voltage source selected
} src_voltage_t;

// Enum of all valid config options
// TODO: Move into config header file
typedef enum {
  CNF_NONE, // No config option
} config_option_t;

// Enum of all valid fans
// TODO: Consider moving into it's own fan page
typedef enum {
  FAN1 = 1,    // The first fan
  FAN2 = 2,    // The second fan
  FAN_NONE // No fan
} fans_t;

// Struct with command context
typedef struct {
  command_t command;         // The command to execute
  src_voltage_t src_voltage; // The selected voltage source
  fans_t fan;                // The selected fan
  config_option_t conf;      // The configuration option to cange
                             // TODO: Add config value field for writing
} command_context_t;

// Fan history variables
extern volatile uint16_t fan1_history[512];
extern volatile uint16_t fan2_history[512];

// Parses the input string and outputs one of the valid commands
void parse_command(uint8_t *command, uint8_t command_len);

// Routes the provided command to the appropriate function to handle it
// If the command is a read command it then returns the current byte.
// The position is the byte to read when multiple bytes are being read.
uint8_t route_command(int pos);

#ifdef __cplusplus
}
#endif

#endif /* COMMAND_HANDLER_H */