#include "zh_avr_ac_dimmer.h"

volatile static bool _is_dimmer_work = false;
volatile static uint8_t _dimmer_value = 0;
static bool _is_initialized = false;

static avr_err_t _zh_avr_ac_dimmer_validate_config(const zh_avr_ac_dimmer_init_config_t *config);

static avr_err_t zh_avr_ac_dimmer_init(const zh_avr_ac_dimmer_init_config_t *config)
{
    ZH_ERROR_CHECK(_is_initialized == false, AVR_ERR_INVALID_STATE);
    avr_err_t err = _zh_avr_pcf8574_validate_config(config);
    ZH_ERROR_CHECK(err == AVR_OK, err);
    switch (config->zero_cross_port)
    {
    case AVR_PORTB:
        DDRB &= ~(1 << config->zero_cross_gpio);
        PORTB |= (1 << config->zero_cross_gpio);
        PCICR |= (1 << PCIE0);
        PCMSK0 |= (1 << config->zero_cross_gpio);
        break;
    case AVR_PORTC:
        DDRC &= ~(1 << config->zero_cross_gpio);
        PORTC |= (1 << config->zero_cross_gpio);
        PCICR |= (1 << PCIE1);
        PCMSK1 |= (1 << config->zero_cross_gpio);
        break;
    case AVR_PORTD:
        DDRD &= ~(1 << config->zero_cross_gpio);
        PORTD |= (1 << config->zero_cross_gpio);
        PCICR |= (1 << PCIE2);
        PCMSK2 |= (1 << config->zero_cross_gpio);
        break;
    default:
        break;
    }
    switch (config->triac_port)
    {
    case AVR_PORTB:
        DDRB |= (1 << config->triac_gpio);
        PORTB &= ~(1 << config->triac_gpio);
        break;
    case AVR_PORTC:
        DDRC |= (1 << config->triac_gpio);
        PORTC &= ~(1 << config->triac_gpio);
        break;
    case AVR_PORTD:
        DDRD |= (1 << config->triac_gpio);
        PORTD &= ~(1 << config->triac_gpio);
        break;
    default:
        break;
    }
    _is_initialized = true;
    return AVR_OK;
}

static avr_err_t zh_avr_ac_dimmer_start(void)
{
    ZH_ERROR_CHECK(_is_initialized == true, AVR_ERR_NOT_FOUND);
    _is_dimmer_work = true;
    return AVR_OK;
}

static avr_err_t zh_avr_ac_dimmer_stop(void)
{
    ZH_ERROR_CHECK(_is_initialized == true, AVR_ERR_NOT_FOUND);
    _is_dimmer_work = false;
    return AVR_OK;
}

static avr_err_t zh_avr_ac_dimmer_set(uint8_t value)
{
    ZH_ERROR_CHECK(_dimmer_value <= 100, AVR_ERR_INVALID_ARG);
    _dimmer_value = value;
    return AVR_OK;
}

static avr_err_t _zh_avr_ac_dimmer_validate_config(const zh_avr_ac_dimmer_init_config_t *config)
{
    ZH_ERROR_CHECK(config != NULL, AVR_ERR_INVALID_ARG);
    ZH_ERROR_CHECK((config->zero_cross_gpio >= 0 && config->zero_cross_gpio <= 7), AVR_ERR_INVALID_ARG);
    ZH_ERROR_CHECK((config->triac_gpio >= 0 && config->triac_gpio <= 7), AVR_ERR_INVALID_ARG);
    ZH_ERROR_CHECK(config->zero_cross_port >= AVR_PORTB && config->zero_cross_port <= AVR_PORTD, AVR_ERR_INVALID_ARG);
    ZH_ERROR_CHECK(config->triac_port >= AVR_PORTB && config->triac_port <= AVR_PORTD, AVR_ERR_INVALID_ARG);
    ZH_ERROR_CHECK(config->ac_dimmer_frequency >= ZH_50HZ && config->ac_dimmer_frequency <= ZH_400HZ, AVR_ERR_INVALID_ARG);
    return AVR_OK;
}