#ifndef BATTERY_H
#define BATTERY_H

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include "ti/driverlib/dl_timerg.h"
//define macro to be used by multiple files in the program witout the variable being overwritten
//for testing
#define NUM_SLOTS (1)


//Battery Tolerance
// how much tolerance do we allow if we charge / discharge before we 
// trigger the control loop to adjust the value
#define BATTERY_CURRENT_THRESHOLD (5)

// for i2c communication to know battery health
#define SOV_THRESHOLD_MV (6000)
#define HOV_THRESHOLD_MV (8000)

#define TEMPERATURE_MAX_C (60)

//Battery Discharge Safety Check
typedef enum{
    SLOT_STATE_OK= 0x00,
    SLOT_STATE_SOV= 0x01,
    SLOT_STATE_HOV= 0x02,

    SLOT_WARN_OVERTEMPERATURE = 0x03,
    SLOT_ERR_OVERTEMPERATURE= (0x04 | 0x80), // first bit indicates complete error

    // Control error states
    SLOT_WARN_LOWER_DAC_NOT_POSSIBLE=0x10,
    SLOT_WARN_HIGHER_DAC_NOT_POSSIBLE=0x11,
    SLOT_WARN_DAC_INVALID_VALUE=0x12,
    SLOT_WARN_LOWER_PWM_NOT_POSSIBLE=0x13,
    SLOT_WARN_HIGHER_PWM_NOT_POSSIBLE=0x14,

    // I2C Slave Error states
    SLOT_ERR_NO_DAC =  (0x20 | 0x80),
    SLOT_ERR_NO_ADC1 = (0x21 | 0x80),
    SLOT_ERR_NO_ADC2 = (0x22 | 0x80),
    SLOT_ERR_NO_ADC3 = (0x23 | 0x80),
    SLOT_ERR_NO_ADC4 = (0x24 | 0x80),
    SLOT_ERR_CONFIGBYTE = (0x25 | 0x80),
    SLOT_ERR_DAC_WRITE_FAILED= (0x26 | 0x80)
} SlotState;

typedef struct{
    uint16_t voltage;
    int16_t current;
    uint16_t temperature;
    SlotState state;
} BatteryMeasurement;

typedef struct {
    // for future extension of error states (overtemp etc): add here
    int16_t set_current;
    BatteryMeasurement measurement;
    uint16_t dac_value;
    uint16_t pwm_value;
    GPTIMER_Regs *timer;
    SlotState *state;
} BatterySlot;

//global battery array declaration: extending visiblity of the variable to multiple source files: variable declaration
extern BatterySlot battery_slots[NUM_SLOTS];

typedef struct {
    void (*init)();
    void (*read_state)(uint8_t slot_id);
    void (*adjust_current)(uint8_t slot_id);
    void (*disable)(uint8_t slot_id);
} BatterySlotManager;

extern BatterySlotManager battery_slotmgr;

#endif