#include "bq27220.h"
#include "bq27220_reg.h"

#include <api-hal-i2c.h>
#include <stdbool.h>

uint16_t bq27220_read_word(uint8_t address) {
    uint8_t buffer[2] = {address};
    uint16_t ret;
    with_api_hal_i2c(
        uint16_t, &ret, () {
            if(api_hal_i2c_trx(
                   POWER_I2C, BQ27220_ADDRESS, buffer, 1, buffer, 2, BQ27220_I2C_TIMEOUT)) {
                return *(uint16_t*)buffer;
            } else {
                return 0;
            }
        });
    return ret;
}

bool bq27220_control(uint16_t control) {
    bool ret;
    with_api_hal_i2c(
        bool, &ret, () {
            uint8_t buffer[3];
            buffer[0] = CommandControl;
            buffer[1] = (control >> 8) & 0xFF;
            buffer[2] = control & 0xFF;
            return api_hal_i2c_tx(POWER_I2C, BQ27220_ADDRESS, buffer, 3, BQ27220_I2C_TIMEOUT);
        });
    return ret;
}

void bq27220_init() {
    bq27220_control(Control_ENTER_CFG_UPDATE);
    bq27220_control(Control_SET_PROFILE_2);
    bq27220_control(Control_EXIT_CFG_UPDATE);
}

uint16_t bq27220_get_voltage() {
    return bq27220_read_word(CommandVoltage);
}

int16_t bq27220_get_current() {
    return bq27220_read_word(CommandCurrent);
}

uint8_t bq27220_get_battery_status(BatteryStatus* battery_status) {
    uint16_t data = bq27220_read_word(CommandBatteryStatus);
    if(data == BQ27220_ERROR) {
        return BQ27220_ERROR;
    } else {
        *(uint16_t*)battery_status = data;
        return BQ27220_SUCCESS;
    }
}

uint8_t bq27220_get_operation_status(OperationStatus* operation_status) {
    uint16_t data = bq27220_read_word(CommandOperationStatus);
    if(data == BQ27220_ERROR) {
        return BQ27220_ERROR;
    } else {
        *(uint16_t*)operation_status = data;
        return BQ27220_SUCCESS;
    }
}

uint16_t bq27220_get_temperature() {
    return bq27220_read_word(CommandTemperature);
}

uint16_t bq27220_get_full_charge_capacity() {
    return bq27220_read_word(CommandFullChargeCapacity);
}

uint16_t bq27220_get_remaining_capacity() {
    return bq27220_read_word(CommandRemainingCapacity);
}

uint16_t bq27220_get_state_of_charge() {
    return bq27220_read_word(CommandStateOfCharge);
}

uint16_t bq27220_get_state_of_health() {
    return bq27220_read_word(CommandStateOfHealth);
}