#include <stdint.h>
#include <stdbool.h>
#include "src/config.h"
#ifndef BATTERY_H
#define BATTERY_H
#define INITIAL_PWM_VALUE (0)
#define PWM_INCREMENT_VALUE (1)
#define PWM_DECREMENT_VALUE (1)
#define PWM_MAX_VALUE (1000)
#define NUM_SLOTS (1)

//Variables to read all the battery measurements from all the slots
extern volatile bool scanInProgress;

//Battery states read by Pi
typedef enum{
    STATE_EMPTY= 0x01,
    STATE_BATTERY_DETECTED= 0x02,
    STATE_WAITING_FOR_LIMITS= 0x03,
    STATE_MEASUREMENT_IN_PROGRESS= 0x04,
    STATE_MEASUREMENT_DONE= 0x04,
    STATE_OVERHEATING= 0x05,

} BatteryState;

//Battery Discharge Safety Check: when defined with type uint8_t takes only 1 byte otherwise takes 4 byte
typedef enum: uint8_t{
    SLOT_STATE_OK= 0x00,
    SLOT_STATE_SOV= 0x01,
    SLOT_ERR_HOV= (0x02 | 0x80),
    SLOT_ERR_OVERTEMPERATURE= (0x03 | 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 slot_state;
}BatteryMeasurement;

typedef enum __attribute__((__packed__)){
    STATE_IDLE,
    STATE_PRE_CHARGE,
    STATE_CC_CHARGING,
    STATE_CV_CHARGING,
    STATE_DISCHARGING,
    STATE_FINAL_DISCHARGE,
    STATE_ERROR,
}BatteryChargingState;

typedef struct{
    uint8_t slot_id;
    uint16_t pwm_value; //for Power Burning PWM
    int16_t charge_discharge;
    BatteryState battery_state;
    BatteryMeasurement battery_measurement;
    uint16_t min_voltage;
    uint16_t max_voltage;
    uint8_t cut_off_current;
    uint16_t capacitance;
    uint8_t charge_fraction;
    uint8_t cycle_number;
    BatteryChargingState battery_charging_state;
    bool batteryLimitReceived;
} BatteryInfo;

extern BatteryInfo battery_data[NUM_SLOTS];
void Battery_Init();
void Battery_StateCondition(uint8_t slot_id);

#endif