/******************************************************************************
 * @file    app_led.c
 * @brief   CBC2 灯效：充电 > 配对 > APP 暂停 > 低电 > 切模式闪 > 开机绿灯提示后灭
 * @author  cyWu <1917507415@qq.com>
 * @date    2026.08.25
 * @version V1.1.0
 * @history
 * - V1.0.0, 2026.08.21, cyWu, 首次发布
 * - V1.1.0, 2026.08.25, cyWu, 开机绿灯只提示几秒，避免待机常亮耗电
 ******************************************************************************/

#include "app_led.h"
#include "bsp_hw.h"
#include "board_pin.h"

static uint8_t s_initialized;
static uint16_t s_phase_ms;
static uint8_t s_mode_left;
static uint16_t s_mode_ms;
static uint8_t s_mode_on;
static uint16_t s_pair_res_ms;
static uint8_t s_pair_res;       /* 0 none 1 ok 2 fail */
static uint16_t s_power_green_ms; /* 开机绿灯剩余 ms，0 则待机灭灯 */

/**
 * @brief  灯效初始化，先全灭
 * @return APP_LED_OK=成功
 */
AppLed_Ret_t app_led_init(void)
{
    if (s_initialized) {
        return APP_LED_OK;
    }
    bsp_led_all_off();
    s_power_green_ms = BOARD_LED_POWER_ON_MS;
    s_initialized = 1;
    return APP_LED_OK;
}

/**
 * @brief  查询模块是否已初始化
 * @return APP_LED_OK=已初始化，APP_LED_ERR_NOT_INIT=未初始化
 */
AppLed_Ret_t app_led_get_status(void)
{
    return s_initialized ? APP_LED_OK : APP_LED_ERR_NOT_INIT;
}

/**
 * @brief  请求切模式绿灯闪两下
 * @return 无
 */
void app_led_request_mode_blink(void)
{
    s_mode_left = BOARD_LED_MODE_BLINK_N;
    s_mode_ms = 0;
    s_mode_on = 0;
}

/**
 * @brief  重新亮几秒开机绿灯（上电 / APP 再开）
 * @return 无
 */
void app_led_hint_power_on(void)
{
    s_power_green_ms = BOARD_LED_POWER_ON_MS;
}

/**
 * @brief  播放一次性配对结果灯：成功常绿，失败红绿交替
 * @param  ok 1=成功，0=失败
 * @return 无
 */
void app_led_start_pair_result(uint8_t ok)
{
    s_pair_res = ok ? 1 : 2;
    s_pair_res_ms = ok ? BOARD_LED_PAIR_OK_MS : BOARD_LED_PAIR_FAIL_MS;
    s_phase_ms = 0;
}

/**
 * @brief  按优先级刷新灯
 * @param  ctx 当前充电/配对/开关/低电；为空则直接返回
 * @param  dt  距上次调用的毫秒数
 * @return 无
 */
void app_led_tick_1ms(const AppLedCtx_t *ctx, uint16_t dt)
{
    uint8_t red = 0;
    uint8_t green = 0;

    if (!s_initialized || !ctx) {
        return;
    }
    if (dt == 0) {
        dt = 1;
    }

    s_phase_ms = (uint16_t)(s_phase_ms + dt);

    /* 1-2 充电独占 */
    if (ctx->charge_led == 1) {
        red = 1;
        green = 0;
        bsp_led_red_set(1);
        bsp_led_green_set(0);
        return;
    }
    if (ctx->charge_led == 2) {
        bsp_led_red_set(0);
        bsp_led_green_set(1);
        return;
    }

    /* 3 配对快闪 */
    if (ctx->pairing) {
        uint16_t t = s_phase_ms % (BOARD_LED_FAST_ON_MS + BOARD_LED_FAST_OFF_MS);
        green = (t < BOARD_LED_FAST_ON_MS) ? 1 : 0;
        bsp_led_red_set(0);
        bsp_led_green_set(green);
        return;
    }

    /* 4 配对结果一次性 */
    if (s_pair_res && s_pair_res_ms) {
        if (s_pair_res == 1) {
            green = 1;
        } else {
            uint16_t t = s_phase_ms % (BOARD_LED_ALT_MS * 2);
            if (t < BOARD_LED_ALT_MS) {
                red = 1;
            } else {
                green = 1;
            }
        }
        if (s_pair_res_ms > dt) {
            s_pair_res_ms = (uint16_t)(s_pair_res_ms - dt);
        } else {
            s_pair_res_ms = 0;
            s_pair_res = 0;
        }
        bsp_led_red_set(red);
        bsp_led_green_set(green);
        return;
    }

    /* 5 APP 暂停：功能灯灭 */
    if (ctx->life_on && ctx->app_power == 0) {
        bsp_led_all_off();
        return;
    }

    /* 6 低电 */
    if (ctx->life_on && ctx->low_bat && ctx->app_power) {
        uint16_t t = s_phase_ms % BOARD_LED_LOWBAT_PERIOD_MS;
        red = (t < BOARD_LED_LOWBAT_ON_MS) ? 1 : 0;
        bsp_led_red_set(red);
        bsp_led_green_set(0);
        return;
    }

    /* 7 切模式闪 2 下 */
    if (s_mode_left) {
        s_mode_ms = (uint16_t)(s_mode_ms + dt);
        if (!s_mode_on) {
            if (s_mode_ms >= BOARD_LED_MODE_OFF_MS) {
                s_mode_ms = 0;
                s_mode_on = 1;
            }
            green = 0;
        } else {
            if (s_mode_ms >= BOARD_LED_MODE_ON_MS) {
                s_mode_ms = 0;
                s_mode_on = 0;
                s_mode_left--;
            }
            green = 1;
        }
        bsp_led_red_set(0);
        bsp_led_green_set(green);
        return;
    }

#if BOARD_LED_STANDBY_ON
    /* 待机绿灯常亮 */
    if (ctx->life_on && ctx->app_power) {
        bsp_led_red_set(0);
        bsp_led_green_set(1);
        return;
    }
#else
    /* 开机绿灯只亮几秒，用来对比灭灯待机电流 */
    if (ctx->life_on && ctx->app_power && s_power_green_ms) {
        if (s_power_green_ms > dt) {
            s_power_green_ms = (uint16_t)(s_power_green_ms - dt);
        } else {
            s_power_green_ms = 0;
        }
        bsp_led_red_set(0);
        bsp_led_green_set(1);
        return;
    }
#endif

    bsp_led_all_off();
}