/*
 * SPDX-FileCopyrightText: 2025 Kozmotronik Tech
 *
 * SPDX-License-Identifier: MIT
 */

#include "esp_check.h"
#include "relay_chn_core.h"
#include "relay_chn_output.h"
#include "relay_chn_run_info.h"
#include "relay_chn_tilt.h"


static const char *TAG = "RELAY_CHN_TILT";

/**@{*/
/*
 * Tilt Pattern Timing Definitions
 * 
 * The min and max timing definitions as well as the default timing definitions.
 * These definitions are used to define and adjust the tilt sensitivity.
 */
#define RELAY_CHN_TILT_RUN_MIN_MS 50
#define RELAY_CHN_TILT_RUN_MAX_MS 10
#define RELAY_CHN_TILT_PAUSE_MIN_MS 450
#define RELAY_CHN_TILT_PAUSE_MAX_MS 90

#define RELAY_CHN_TILT_DEFAULT_RUN_MS 15
#define RELAY_CHN_TILT_DEFAULT_PAUSE_MS 150

#define RELAY_CHN_TILT_DEFAULT_SENSITIVITY \
    ( (RELAY_CHN_TILT_DEFAULT_RUN_MS - RELAY_CHN_TILT_RUN_MIN_MS) \
    * 100 / (RELAY_CHN_TILT_RUN_MAX_MS - RELAY_CHN_TILT_RUN_MIN_MS) )
/**@}*/

ESP_EVENT_DEFINE_BASE(RELAY_CHN_TILT_CMD_EVENT_BASE);


/// @brief Tilt steps.
typedef enum {
    RELAY_CHN_TILT_STEP_NONE,       /*!< No step */
    RELAY_CHN_TILT_STEP_PENDING,    /*!< Pending step */
    RELAY_CHN_TILT_STEP_MOVE,       /*!< Move step. Tilt is driving either for forward or reverse */
    RELAY_CHN_TILT_STEP_PAUSE       /*!< Pause step. Tilt is paused */
} relay_chn_tilt_step_t;

/// @brief Tilt timing structure to manage tilt pattern timing.
typedef struct {
    uint8_t sensitivity;    /*!< Tilt sensitivity in percentage (%) */
    uint32_t move_time_ms;  /*!< Move time in milliseconds */
    uint32_t pause_time_ms; /*!< Pause time in milliseconds */
} relay_chn_tilt_timing_t;

/// @brief Tilt counter structure to manage tilt count.
typedef struct {
    uint32_t tilt_forward_count;    /*!< Tilt forward count */
    uint32_t tilt_reverse_count;    /*!< Tilt reverse count */
} relay_chn_tilt_counter_t;

/// @brief Tilt control structure to manage tilt operations.
typedef struct relay_chn_tilt_ctl {
    relay_chn_ctl_t *chn_ctl;               /*!< The relay channel control structure */
    relay_chn_tilt_cmd_t cmd;               /*!< The tilt command in process */
    relay_chn_tilt_step_t step;             /*!< Current tilt step */
    relay_chn_tilt_timing_t tilt_timing;    /*!< Tilt timing structure */
    relay_chn_tilt_counter_t tilt_counter;  /*!< Tilt counter structure */
    esp_timer_handle_t tilt_timer;          /*!< Tilt timer handle */
} relay_chn_tilt_ctl_t;


#if RELAY_CHN_COUNT > 1
static relay_chn_tilt_ctl_t tilt_ctls[RELAY_CHN_COUNT];
#else
static relay_chn_tilt_ctl_t tilt_ctl;
#endif


esp_err_t relay_chn_tilt_dispatch_cmd(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_tilt_cmd_t cmd)
{
    if (cmd == RELAY_CHN_TILT_CMD_NONE) return ESP_ERR_INVALID_ARG;

    // Since the event_loop library creates a deep copy of the event data,
    // and we need to pass the pointer of the relevant tilt control, here we need
    // to pass the pointer to the pointer of the tilt_control (&tilt_ctl) so that
    // the  pointer value is preserved in the event data.
    return esp_event_post_to(relay_chn_event_loop,
                             RELAY_CHN_TILT_CMD_EVENT_BASE,
                             cmd,
                             &tilt_ctl,
                             sizeof(tilt_ctl), portMAX_DELAY);
}

// Returns the required timing before tilting depending on the last run.
static uint32_t relay_chn_tilt_get_required_timing_before_tilting(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_tilt_cmd_t cmd)
{
    relay_chn_cmd_t last_run_cmd = relay_chn_run_info_get_last_run_cmd(tilt_ctl->chn_ctl->run_info);
    if (cmd == RELAY_CHN_TILT_CMD_FORWARD && last_run_cmd == RELAY_CHN_CMD_REVERSE)
        return 0;
    else if (cmd == RELAY_CHN_TILT_CMD_REVERSE && last_run_cmd == RELAY_CHN_CMD_FORWARD)
        return 0;
    
    uint32_t last_run_cmd_time_ms = relay_chn_run_info_get_last_run_cmd_time_ms(tilt_ctl->chn_ctl->run_info);
    uint32_t inertia_time_passed_ms = (uint32_t) (esp_timer_get_time() / 1000) - last_run_cmd_time_ms;
    return RELAY_CHN_OPPOSITE_INERTIA_MS - inertia_time_passed_ms;
}

// Issue a tilt command to a specific relay channel.
static void relay_chn_tilt_issue_cmd(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_tilt_cmd_t cmd)
{
    if (relay_chn_run_info_get_last_run_cmd(tilt_ctl->chn_ctl->run_info) == RELAY_CHN_CMD_NONE) {
        // Do not tilt if the channel hasn't been run before
        ESP_LOGD(TAG, "relay_chn_tilt_issue_cmd: Tilt will not be executed since the channel hasn't been run yet");
        return;
    }
    
    if (tilt_ctl->cmd == cmd) {
        ESP_LOGD(TAG, "relay_chn_tilt_issue_cmd: There is already a tilt command in progress!");
        return;
    }

    // Set the command that will be processed
    tilt_ctl->cmd = cmd;
    switch (tilt_ctl->chn_ctl->state) {
        case RELAY_CHN_STATE_IDLE:
            // Relay channel is free, tilt can be issued immediately
            relay_chn_tilt_dispatch_cmd(tilt_ctl, cmd);
            break;
        
        case RELAY_CHN_STATE_FORWARD_PENDING:
        case RELAY_CHN_STATE_REVERSE_PENDING:
            // Issue a stop command first so that the timer and pending cmd get cleared
            relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
            // break not put intentionally
        case RELAY_CHN_STATE_STOPPED: {
            // Check if channel needs timing before tilting
            uint32_t req_timing_ms = relay_chn_tilt_get_required_timing_before_tilting(tilt_ctl, cmd);
            if (req_timing_ms == 0) {
                relay_chn_tilt_dispatch_cmd(tilt_ctl, cmd);
            } else {
                // Channel needs timing before running tilting action, schedule it
                tilt_ctl->step = RELAY_CHN_TILT_STEP_PENDING;
                relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, req_timing_ms);
            }
            break;
        }

        case RELAY_CHN_STATE_FORWARD:
            if (cmd == RELAY_CHN_TILT_CMD_FORWARD) {
                // Stop the running channel first
                relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
                // Schedule for tilting
                tilt_ctl->step = RELAY_CHN_TILT_STEP_PENDING;
                relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, RELAY_CHN_OPPOSITE_INERTIA_MS);
            } else if (cmd == RELAY_CHN_TILT_CMD_REVERSE) {
                // Stop the running channel first
                relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
                // If the tilt cmd is TILT_REVERSE then dispatch it immediately
                relay_chn_tilt_dispatch_cmd(tilt_ctl, cmd);
            }
            break;

        case RELAY_CHN_STATE_REVERSE:
            if (cmd == RELAY_CHN_TILT_CMD_REVERSE) {
                // Stop the running channel first
                relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
                // Schedule for tilting
                tilt_ctl->step = RELAY_CHN_TILT_STEP_PENDING;
                relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, RELAY_CHN_OPPOSITE_INERTIA_MS);
            } else if (cmd == RELAY_CHN_TILT_CMD_FORWARD) {
                // Stop the running channel first
                relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
                // If the tilt cmd is TILT_FORWARD then dispatch it immediately
                relay_chn_tilt_dispatch_cmd(tilt_ctl, cmd);
            }
            break;

        default:
            ESP_LOGD(TAG, "relay_chn_tilt_issue_cmd: Unexpected relay channel state: %s!", relay_chn_state_str(tilt_ctl->chn_ctl->state));
    }
}

static void relay_chn_tilt_issue_auto(relay_chn_tilt_ctl_t *tilt_ctl)
{
    relay_chn_cmd_t last_run_cmd = relay_chn_run_info_get_last_run_cmd(tilt_ctl->chn_ctl->run_info);
    if (last_run_cmd == RELAY_CHN_CMD_FORWARD || tilt_ctl->chn_ctl->state == RELAY_CHN_STATE_FORWARD) {
        relay_chn_tilt_issue_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_FORWARD);
    }
    else if (last_run_cmd == RELAY_CHN_CMD_REVERSE || tilt_ctl->chn_ctl->state == RELAY_CHN_STATE_REVERSE) {
        relay_chn_tilt_issue_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_REVERSE);
    }
}

#if RELAY_CHN_COUNT > 1
void relay_chn_tilt_auto(uint8_t chn_id)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return;
    }

    // Execute for all channels
    if (chn_id == RELAY_CHN_ID_ALL) {
        for (int i = 0; i < RELAY_CHN_COUNT; i++) {
            relay_chn_tilt_issue_auto(&tilt_ctls[i]);
        }
    }
    // Execute for a single channel
    else {
        relay_chn_tilt_ctl_t* tilt_ctl = &tilt_ctls[chn_id];
        relay_chn_tilt_issue_auto(tilt_ctl);
    }
}

static void relay_chn_tilt_issue_cmd_on_all_channels(relay_chn_tilt_cmd_t cmd)
{
    for (int i = 0; i < RELAY_CHN_COUNT; i++) {
        relay_chn_tilt_ctl_t* tilt_ctl = &tilt_ctls[i];
        relay_chn_tilt_issue_cmd(tilt_ctl, cmd);
    }
}

void relay_chn_tilt_forward(uint8_t chn_id)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return;
    }
    
    if (chn_id == RELAY_CHN_ID_ALL)
        relay_chn_tilt_issue_cmd_on_all_channels(RELAY_CHN_TILT_CMD_FORWARD);
    else {
        relay_chn_tilt_ctl_t* tilt_ctl = &tilt_ctls[chn_id];
        relay_chn_tilt_issue_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_FORWARD);
    }
}

void relay_chn_tilt_reverse(uint8_t chn_id)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return;
    }
    
    if (chn_id == RELAY_CHN_ID_ALL)
    relay_chn_tilt_issue_cmd_on_all_channels(RELAY_CHN_TILT_CMD_REVERSE);
    else {
        relay_chn_tilt_ctl_t* tilt_ctl = &tilt_ctls[chn_id];
        relay_chn_tilt_issue_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_REVERSE);
    }
}

void relay_chn_tilt_stop(uint8_t chn_id)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return;
    }
    
    if (chn_id == RELAY_CHN_ID_ALL) {
        for (int i = 0; i < RELAY_CHN_COUNT; i++) {
            relay_chn_tilt_dispatch_cmd(&tilt_ctls[i], RELAY_CHN_TILT_CMD_STOP);
        }
    }
    else {
        relay_chn_tilt_dispatch_cmd(&tilt_ctls[chn_id], RELAY_CHN_TILT_CMD_STOP);
    }
}

#else // RELAY_CHN_COUNT > 1

void relay_chn_tilt_auto()
{
    relay_chn_tilt_issue_auto(&tilt_ctl);
}

void relay_chn_tilt_forward()
{
    relay_chn_tilt_issue_cmd(&tilt_ctl, RELAY_CHN_TILT_CMD_FORWARD);
}

void relay_chn_tilt_reverse()
{
    relay_chn_tilt_issue_cmd(&tilt_ctl, RELAY_CHN_TILT_CMD_REVERSE);
}

void relay_chn_tilt_stop()
{
    relay_chn_tilt_dispatch_cmd(&tilt_ctl, RELAY_CHN_TILT_CMD_STOP);
}
#endif // RELAY_CHN_COUNT > 1

static void relay_chn_tilt_set_timing_values(relay_chn_tilt_timing_t *tilt_timing,
                                             uint8_t sensitivity,
                                             uint32_t run_time_ms,
                                             uint32_t pause_time_ms)
{
    tilt_timing->sensitivity = sensitivity;
    tilt_timing->move_time_ms = run_time_ms;
    tilt_timing->pause_time_ms = pause_time_ms;
}

static void _relay_chn_tilt_sensitivity_set(relay_chn_tilt_ctl_t *tilt_ctl, uint8_t sensitivity)
{
    if (sensitivity >= 100) {
        relay_chn_tilt_set_timing_values(&tilt_ctl->tilt_timing,
                                         100,
                                         RELAY_CHN_TILT_RUN_MAX_MS,
                                         RELAY_CHN_TILT_PAUSE_MAX_MS);
    }
    else if (sensitivity == 0) {
        relay_chn_tilt_set_timing_values(&tilt_ctl->tilt_timing,
                                         0,
                                         RELAY_CHN_TILT_RUN_MIN_MS,
                                         RELAY_CHN_TILT_PAUSE_MIN_MS);
    }
    else {
        // Compute the new timing values from the sensitivity percent value by using linear interpolation
        uint32_t tilt_run_time_ms = 0, tilt_pause_time_ms = 0;
        tilt_run_time_ms = RELAY_CHN_TILT_RUN_MIN_MS + (sensitivity * (RELAY_CHN_TILT_RUN_MAX_MS - RELAY_CHN_TILT_RUN_MIN_MS) / 100);
        tilt_pause_time_ms = RELAY_CHN_TILT_PAUSE_MIN_MS + (sensitivity * (RELAY_CHN_TILT_PAUSE_MAX_MS - RELAY_CHN_TILT_PAUSE_MIN_MS) / 100);
        
        relay_chn_tilt_set_timing_values(&tilt_ctl->tilt_timing,
                                         sensitivity,
                                         tilt_run_time_ms,
                                         tilt_pause_time_ms);
    }
}

#if RELAY_CHN_COUNT > 1
void relay_chn_tilt_set_sensitivity(uint8_t chn_id, uint8_t sensitivity)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return;
    }
    
    if (chn_id == RELAY_CHN_ID_ALL) {
        for (int i = 0; i < RELAY_CHN_COUNT; i++) {
            _relay_chn_tilt_sensitivity_set(&tilt_ctls[i], sensitivity);
        }
    }
    else {
        _relay_chn_tilt_sensitivity_set(&tilt_ctls[chn_id], sensitivity);
    }
}

esp_err_t relay_chn_tilt_get_sensitivity(uint8_t chn_id, uint8_t *sensitivity, size_t length)
{
    if (!relay_chn_is_channel_id_valid(chn_id)) {
        return ESP_ERR_INVALID_ARG;
    }
    if (sensitivity == NULL) {
        ESP_LOGD(TAG, "relay_chn_tilt_get_sensitivity: sensitivity is NULL");
        return ESP_ERR_INVALID_ARG;
    }
    if (chn_id == RELAY_CHN_ID_ALL) {
        if (length < RELAY_CHN_COUNT) {
            ESP_LOGD(TAG, "relay_chn_tilt_get_sensitivity: length is too short to store all sensitivity values");
            return ESP_ERR_INVALID_ARG;
        }

        for (int i = 0; i < RELAY_CHN_COUNT; i++) {
            sensitivity[i] = tilt_ctls[i].tilt_timing.sensitivity;
        }
        return ESP_OK;
    }
    *sensitivity = tilt_ctls[chn_id].tilt_timing.sensitivity;
    return ESP_OK;
}

#else

void relay_chn_tilt_set_sensitivity(uint8_t sensitivity)
{
    _relay_chn_tilt_sensitivity_set(&tilt_ctl, sensitivity);
}

uint8_t relay_chn_tilt_get_sensitivity()
{
    return tilt_ctl.tilt_timing.sensitivity;
}
#endif // RELAY_CHN_COUNT > 1

void relay_chn_tilt_reset_count(relay_chn_tilt_ctl_t *tilt_ctl)
{
    tilt_ctl->tilt_counter.tilt_forward_count = 0;
    tilt_ctl->tilt_counter.tilt_reverse_count = 0;
}

/**
 * @brief Update tilt count automatically and return the current value.
 * 
 * This helper function updates the relevant tilt count depending on the
 * last run info and helps the tilt module in deciding whether the requested
 * tilt should execute or not.
 * This is useful to control reverse tilting particularly. For example:
 *   - If the channel's last run was FORWARD and a TILT_FORWARD is requested,
 *     then the tilt counter will count up on the 
 *     relay_chn_tilt_counter_type::tilt_forward_count and the function will
 *     return the actual count.
 *   - If the channel's last run was FORWARD and a TILT_REVERSE is requested,
 *     then the relay_chn_tilt_counter_type::tilt_forward_count will be checked
 *     against zero first, and then it will count down and return the actual count
 *     if it is greater than 0, else the function will return 0.
 *   - If the tilt command is irrelevant then the function will return 0.
 *   - If the last run is irrelevant then the function will return 0.
 * 
 * @param tilt_ctl The relay channel handle.
 * @return uint32_t The actual value of the relevant counter.
 * @return 0 if:
 *           - related counter is already 0.
 *           - tilt command is irrelevant.
 *           - last run info is irrelevant.
 */
static uint32_t relay_chn_tilt_count_update(relay_chn_tilt_ctl_t *tilt_ctl)
{
    relay_chn_cmd_t last_run_cmd = relay_chn_run_info_get_last_run_cmd(tilt_ctl->chn_ctl->run_info);
    if (last_run_cmd == RELAY_CHN_CMD_FORWARD) {
        if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_FORWARD) {
            return ++tilt_ctl->tilt_counter.tilt_forward_count;
        }
        else if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_REVERSE) {
            if (tilt_ctl->tilt_counter.tilt_forward_count > 0) {
                --tilt_ctl->tilt_counter.tilt_forward_count;
                // Still should do one more move, return non-zero value
                return 1;
            }
            else
                return 0;
        }
        else {
            relay_chn_tilt_reset_count(tilt_ctl);
            return 0;
        }
    }
    else if (last_run_cmd == RELAY_CHN_CMD_REVERSE) {
        if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_REVERSE) {
            return ++tilt_ctl->tilt_counter.tilt_reverse_count;
        }
        else if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_FORWARD) {
            if (tilt_ctl->tilt_counter.tilt_reverse_count > 0) {
                --tilt_ctl->tilt_counter.tilt_reverse_count;
                // Still should do one more move, return non-zero value
                return 1;
            }
            else
                return 0;
        }
        else {
            relay_chn_tilt_reset_count(tilt_ctl);
            return 0;
        }
    }
    return 0;
}

static void relay_chn_tilt_execute_stop(relay_chn_tilt_ctl_t *tilt_ctl)
{
    // Stop the channel's timer if active
    esp_timer_stop(tilt_ctl->tilt_timer);
    // Invalidate tilt cmd and step
    tilt_ctl->cmd = RELAY_CHN_TILT_CMD_NONE;
    tilt_ctl->step = RELAY_CHN_TILT_STEP_NONE;
    // Stop the channel
    if (relay_chn_output_stop(tilt_ctl->chn_ctl->output) != ESP_OK) {
        ESP_LOGE(TAG, "relay_chn_tilt_execute_stop: Failed to output stop for relay channel #%d!", tilt_ctl->chn_ctl->id);
    }
    relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
}

static void relay_chn_tilt_execute_forward(relay_chn_tilt_ctl_t *tilt_ctl)
{
    if (relay_chn_output_reverse(tilt_ctl->chn_ctl->output) != ESP_OK) {
        ESP_LOGE(TAG, "relay_chn_tilt_execute_forward: Failed to output reverse for relay channel #%d!", tilt_ctl->chn_ctl->id);
        // Stop tilting because of the error
        relay_chn_tilt_dispatch_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_STOP);
        return;
    }
    // Set the move time timer
    relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, tilt_ctl->tilt_timing.move_time_ms);
    // Set to pause step
    tilt_ctl->step = RELAY_CHN_TILT_STEP_PAUSE;
}

static void relay_chn_tilt_execute_reverse(relay_chn_tilt_ctl_t *tilt_ctl)
{
    if (relay_chn_output_forward(tilt_ctl->chn_ctl->output) != ESP_OK) {
        ESP_LOGE(TAG, "relay_chn_tilt_execute_reverse: Failed to output forward for relay channel #%d!", tilt_ctl->chn_ctl->id);
        // Stop tilting because of the error
        relay_chn_tilt_dispatch_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_STOP);
        return;
    }
    // Set the move time timer
    relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, tilt_ctl->tilt_timing.move_time_ms);
    // Set to pause step
    tilt_ctl->step = RELAY_CHN_TILT_STEP_PAUSE;
}

static void relay_chn_tilt_execute_pause(relay_chn_tilt_ctl_t *tilt_ctl)
{
    // Pause the channel
    if (relay_chn_output_stop(tilt_ctl->chn_ctl->output) != ESP_OK) {
        ESP_LOGE(TAG, "relay_chn_tilt_execute_pause: Failed to output stop for relay channel #%d!", tilt_ctl->chn_ctl->id);
        // Stop tilting because of the error
        relay_chn_tilt_dispatch_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_STOP);
        return;
    }

    // Update the tilt counter before the next move and expect the return value to be greater than 0
    if (relay_chn_tilt_count_update(tilt_ctl) == 0) {
        ESP_LOGD(TAG, "relay_chn_tilt_execute_pause: Relay channel cannot tilt anymore");
        // Stop tilting since the tilting limit has been reached
        relay_chn_tilt_dispatch_cmd(tilt_ctl, RELAY_CHN_TILT_CMD_STOP);
        return;
    }

    // Set the pause time timer
    relay_chn_start_esp_timer_once(tilt_ctl->tilt_timer, tilt_ctl->tilt_timing.pause_time_ms);
    // Set to move step
    tilt_ctl->step = RELAY_CHN_TILT_STEP_MOVE;
}

static void relay_chn_tilt_event_handler(void *handler_arg, esp_event_base_t event_base, int32_t event_id, void *event_data)
{
    relay_chn_tilt_ctl_t* tilt_ctl = *(relay_chn_tilt_ctl_t**) event_data;
    ESP_RETURN_VOID_ON_FALSE(tilt_ctl != NULL, TAG, "event_data is NULL");
    ESP_LOGD(TAG, "relay_chn_event_handler: Command: %s", relay_chn_cmd_str(event_id));

    switch(event_id) {
        case RELAY_CHN_TILT_CMD_STOP:
            relay_chn_tilt_execute_stop(tilt_ctl);
            break;
        case RELAY_CHN_TILT_CMD_FORWARD:
            relay_chn_tilt_execute_forward(tilt_ctl);
            // Update channel state
            relay_chn_update_state(tilt_ctl->chn_ctl, RELAY_CHN_STATE_TILT_FORWARD);
            break;
        case RELAY_CHN_TILT_CMD_REVERSE:
            relay_chn_tilt_execute_reverse(tilt_ctl);
            // Update channel state
            relay_chn_update_state(tilt_ctl->chn_ctl, RELAY_CHN_STATE_TILT_REVERSE);
            break;
        default:
            ESP_LOGW(TAG, "Unexpected relay channel tilt command: %ld!", event_id);
    }
}

// Timer callback for the relay_chn_tilt_control_t::tilt_timer
static void relay_chn_tilt_timer_cb(void *arg)
{
    relay_chn_tilt_ctl_t* tilt_ctl = (relay_chn_tilt_ctl_t*) arg;
    ESP_RETURN_VOID_ON_FALSE(tilt_ctl != NULL, TAG, "relay_chn_tilt_timer_cb: event_data is NULL");
    
    switch (tilt_ctl->step)
    {
        case RELAY_CHN_TILT_STEP_MOVE:
            if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_FORWARD) {
                relay_chn_tilt_execute_forward(tilt_ctl);
            }
            else if (tilt_ctl->cmd == RELAY_CHN_TILT_CMD_REVERSE) {
                relay_chn_tilt_execute_reverse(tilt_ctl);
            }
            break;

        case RELAY_CHN_TILT_STEP_PAUSE:
            relay_chn_tilt_execute_pause(tilt_ctl);
            break;

        case RELAY_CHN_TILT_STEP_PENDING:
            // Just dispatch the pending tilt command
            relay_chn_tilt_dispatch_cmd(tilt_ctl, tilt_ctl->cmd);
            break;
        
        default:
            break;
    }
}

esp_err_t relay_chn_tilt_ctl_init(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_ctl_t *chn_ctl)
{
    tilt_ctl->cmd = RELAY_CHN_TILT_CMD_NONE;
    tilt_ctl->step = RELAY_CHN_TILT_STEP_NONE;
    tilt_ctl->tilt_timing.sensitivity = RELAY_CHN_TILT_DEFAULT_SENSITIVITY;
    tilt_ctl->tilt_timing.move_time_ms = RELAY_CHN_TILT_DEFAULT_RUN_MS;
    tilt_ctl->tilt_timing.pause_time_ms = RELAY_CHN_TILT_DEFAULT_PAUSE_MS;
    relay_chn_tilt_reset_count(tilt_ctl);

    tilt_ctl->chn_ctl = chn_ctl;
    tilt_ctl->chn_ctl->tilt_ctl = tilt_ctl; // 
    
    // Create tilt timer for the channel
    char timer_name[32];
    snprintf(timer_name, sizeof(timer_name), "relay_chn_%2d_tilt_timer", chn_ctl->id);
    esp_timer_create_args_t timer_args = {
        .callback = relay_chn_tilt_timer_cb,
        .arg = tilt_ctl,
        .name = timer_name
    };
    return esp_timer_create(&timer_args, &tilt_ctl->tilt_timer);
}

esp_err_t relay_chn_tilt_init(relay_chn_ctl_t *chn_ctls)
{
#if RELAY_CHN_COUNT > 1
    for (int i = 0; i < RELAY_CHN_COUNT; i++) {
        relay_chn_tilt_ctl_init(&tilt_ctls[i], &chn_ctls[i]);
    }
#else
    relay_chn_tilt_ctl_init(&tilt_ctl, chn_ctls);
#endif // RELAY_CHN_COUNT > 1

    return esp_event_handler_register_with(relay_chn_event_loop, 
                                          RELAY_CHN_TILT_CMD_EVENT_BASE,
                                          ESP_EVENT_ANY_ID,
                                          relay_chn_tilt_event_handler, NULL);
}

void relay_chn_tilt_ctl_deinit(relay_chn_tilt_ctl_t *tilt_ctl)
{
    if (tilt_ctl->tilt_timer != NULL) {
        esp_timer_delete(tilt_ctl->tilt_timer);
        tilt_ctl->tilt_timer = NULL;
    }
}

void relay_chn_tilt_deinit()
{
#if RELAY_CHN_COUNT > 1
    for (int i = 0; i < RELAY_CHN_COUNT; i++) {
        relay_chn_tilt_ctl_deinit(&tilt_ctls[i]);
    }
#else
    relay_chn_tilt_ctl_deinit(&tilt_ctl);
#endif // RELAY_CHN_COUNT > 1
    esp_event_handler_unregister_with(relay_chn_event_loop, 
                                      RELAY_CHN_TILT_CMD_EVENT_BASE,
                                      ESP_EVENT_ANY_ID,
                                      relay_chn_tilt_event_handler);
}