/**
 * @Author: 李建
 * @Date: 2025/4/22 10:24
 * Description: 蜂鸣器模块
 * Copyright: Copyright (©) 2025 永续绿建. All rights reserved.
 */
#include "freertos/FreeRTOS.h"
#include <freertos/event_groups.h>
#include "beep.h"
#include "driver/ledc.h"
#include "esp_err.h"
#include "main.h"

#define BEEP_BIT BIT0
#define STOP_BEEP_BIT BIT1
static EventGroupHandle_t beep_event_group;

void beep() {
    xEventGroupSetBits(beep_event_group, BEEP_BIT);
}

void beep_stop() {
    xEventGroupSetBits(beep_event_group, STOP_BEEP_BIT);
}

static void set_beep() {
    if(system_setting.sound_on_off == 0)return;
    // Set duty to 50%
    ESP_ERROR_CHECK(ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, system_setting.sound_volume));
    // Update duty to apply the new value
    ESP_ERROR_CHECK(ledc_update_duty(LEDC_MODE, LEDC_CHANNEL));
}

static void set_beep_stop() {
    // Stop fading
    ESP_ERROR_CHECK(ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, 0));
    // Update duty to apply the new value
    ESP_ERROR_CHECK(ledc_update_duty(LEDC_MODE, LEDC_CHANNEL));
}

static void beep_task(void * arg) {
    for(;;) {
        EventBits_t bits = xEventGroupWaitBits(beep_event_group, BEEP_BIT | STOP_BEEP_BIT, pdTRUE, pdFALSE, portMAX_DELAY);
        if(bits & BEEP_BIT) {
            set_beep();
            vTaskDelay(60 / portTICK_PERIOD_MS);
            set_beep_stop();
        }
        if(bits & STOP_BEEP_BIT) {
            set_beep_stop();
        }
    }
}

/**
 * @brief 蜂鸣器模块初始化
 */
void beep_init(void) {
    ledc_timer_config_t ledc_timer = {
            .speed_mode       = LEDC_MODE,
            .timer_num        = LEDC_TIMER,
            .duty_resolution  = LEDC_DUTY_RES,
            .freq_hz          = LEDC_FREQUENCY,  // Set output frequency at 4 kHz
            .clk_cfg          = LEDC_AUTO_CLK
    };
    ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));
    ledc_channel_config_t ledc_channel = {
            .speed_mode     = LEDC_MODE,
            .channel        = LEDC_CHANNEL,
            .timer_sel      = LEDC_TIMER,
            .intr_type      = LEDC_INTR_DISABLE,
            .gpio_num       = LEDC_OUTPUT_IO,
            .duty           = 0, // Set duty to 0%
            .hpoint         = 0
    };
    ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
    beep_event_group = xEventGroupCreate();
    xTaskCreate(beep_task, "beep_task", 2048, NULL, 5, NULL);
}