/******************************************************************************
 * @file    app_zc.c
 * @brief   过零业务：20ms 节拍判定 100ms 无沿超时
 * @author  cyWu <1917507415@qq.com>
 * @date    2026.09.04
 * @version V1.1.0
 * @history
 * - V1.1.0, 2026.09.04, cyWu, 精简注释
 * - V1.0.0, 2026.09.04, cyWu, 首次发布
 ******************************************************************************/

#include "system/includes.h"
#include "app_zc.h"
#include "app_relay.h"
#include "bsp_zc.h"
#include "board_pin.h"

#define LOG_TAG_CONST APP
#define LOG_TAG       "[APP_ZC]"
#define LOG_INFO_ENABLE
#include "debug.h"

typedef struct {
    uint8_t initialized;
    uint8_t last_request;
    uint8_t timeout_evt; /**< 1=开放弃 2=关强断，任务上下文取走打印 */
    uint16_t pending_ms;
} AppZcCtx_t;

static AppZcCtx_t s_zc;

/**
 * @brief  初始化过零业务并挂继电器沿回调
 * @return 无
 */
void app_zc_init(void)
{
    if (s_zc.initialized) {
        return;
    }
#if BOARD_ZC_ENABLE
    bsp_zc_init(app_relay_zc_edge);
    s_zc.pending_ms = 0;
    s_zc.last_request = app_relay_get_request();
    s_zc.initialized = 1;
    log_info("zc init ok\n");
#else
    log_info("zc disabled\n");
#endif
}

/**
 * @brief  20ms 节拍：pending 满 100ms 无沿则超时处理
 * @param  dt 距上次调用的毫秒数
 * @return 无
 */
void app_zc_poll(uint16_t dt)
{
#if !BOARD_ZC_ENABLE
    (void)dt;
    return;
#endif
    if (!s_zc.initialized) {
        return;
    }

    if (app_relay_get_request() != s_zc.last_request) {
        s_zc.pending_ms = 0;
        s_zc.last_request = app_relay_get_request();
    }

    if (!app_relay_synced()) {
        s_zc.pending_ms = (uint16_t)(s_zc.pending_ms + dt);
        if (s_zc.pending_ms >= BOARD_ZC_TIMEOUT_MS) {
            s_zc.pending_ms = 0;
            s_zc.timeout_evt = app_relay_get_request() ? 1 : 2;
            app_relay_zc_timeout();
        }
    } else {
        s_zc.pending_ms = 0;
    }
}

/**
 * @brief  取走一次超时事件（任务上下文打印）
 * @return 0=无 1=开放弃 2=关强断
 */
uint8_t app_zc_consume_timeout(void)
{
    uint8_t evt = s_zc.timeout_evt;
    s_zc.timeout_evt = 0;
    return evt;
}