// components/ocpp/src/ocpp.c

#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include <math.h>

#include "esp_log.h"
#include "esp_err.h"
#include "esp_timer.h"
#include "esp_event.h"
#include "esp_wifi.h"

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

#include "ocpp.h"
#include "ocpp_events.h"

#include "evse_error.h"
#include "auth_events.h"
#include "evse_events.h"
#include "evse_state.h"
#include "meter_events.h"

/* MicroOcpp includes */
#include <mongoose.h>
#include <MicroOcpp_c.h>               // C-facade of MicroOcpp
#include <MicroOcppMongooseClient_c.h> // WebSocket integration for ESP-IDF

// NEW storage layer
#include "storage_service.h"

#define NVS_NAMESPACE "ocpp"
#define NVS_OCPP_ENABLED "enabled"
#define NVS_OCPP_SERVER "ocpp_server"
#define NVS_OCPP_CHARGE_ID "charge_id"

static const char *TAG = "ocpp";

static bool enabled = false;

static TaskHandle_t ocpp_task = NULL;

static struct mg_mgr mgr;                   // Event manager
static OCPP_Connection *g_ocpp_conn = NULL; // Para shutdown limpo

static esp_event_handler_instance_t s_auth_verify_inst = NULL;

// Flags refletindo o estado do EVSE (atualizadas por eventos)
static volatile bool s_ev_plugged = false;
static volatile bool s_ev_ready = false;

static esp_event_handler_instance_t s_evse_state_inst = NULL;

// Flags de config (vindas de EVSE_EVENTS)
static volatile bool s_evse_enabled = true;
static volatile bool s_evse_available = true;

static esp_event_handler_instance_t s_evse_enable_inst = NULL;
static esp_event_handler_instance_t s_evse_available_inst = NULL;

// --- cache de medições vindas de METER_EVENT_DATA_READY ---
typedef struct
{
    float vrms[3];
    float irms[3];
    int32_t watt[3]; // ativo por fase (W)
    float frequency;
    float power_factor;

    float total_energy_Wh;

    int32_t sum_watt;
    float avg_voltage;
    float sum_current;

    bool have_data;
} ocpp_meter_cache_t;

static ocpp_meter_cache_t s_meter = {0};
static portMUX_TYPE s_meter_mux = portMUX_INITIALIZER_UNLOCKED;
static esp_event_handler_instance_t s_meter_inst = NULL;

// valor de oferta (A por conector)
static float s_current_offered_A = 16.0f;

static float getCurrentOffered(void)
{
    return s_current_offered_A;
}

// -----------------------------------------------------------------------------
// Storage helpers (robustos)
// -----------------------------------------------------------------------------
#define STORE_TO pdMS_TO_TICKS(800)
#define STORE_FLUSH_TO pdMS_TO_TICKS(2000)

static void storage_init_best_effort(void)
{
    esp_err_t e = storage_service_init();
    if (e != ESP_OK)
        ESP_LOGW(TAG, "storage_service_init failed: %s", esp_err_to_name(e));
}

static esp_err_t store_flush_best_effort(void)
{
    esp_err_t e = storage_flush_sync(STORE_FLUSH_TO);
    if (e != ESP_OK)
        ESP_LOGW(TAG, "storage_flush_sync failed: %s", esp_err_to_name(e));
    return e;
}

static esp_err_t store_set_u8_best_effort(const char *ns, const char *key, uint8_t v)
{
    for (int attempt = 0; attempt < 3; ++attempt)
    {
        esp_err_t e = storage_set_u8_async(ns, key, v);
        if (e == ESP_OK)
            return ESP_OK;

        if (e == ESP_ERR_TIMEOUT)
        {
            (void)store_flush_best_effort();
            vTaskDelay(pdMS_TO_TICKS(10));
            continue;
        }
        return e;
    }
    return ESP_ERR_TIMEOUT;
}

static esp_err_t store_set_str_best_effort(const char *ns, const char *key, const char *s)
{
    for (int attempt = 0; attempt < 3; ++attempt)
    {
        esp_err_t e = storage_set_str_async(ns, key, s ? s : "");
        if (e == ESP_OK)
            return ESP_OK;

        if (e == ESP_ERR_TIMEOUT)
        {
            (void)store_flush_best_effort();
            vTaskDelay(portMAX_DELAY);
            continue;
        }
        return e;
    }
    return ESP_ERR_TIMEOUT;
}

// Lê string de forma segura (buffer grande -> truncagem segura para out)
static esp_err_t store_get_str_safe(const char *ns, const char *key, char *out, size_t out_sz)
{
    if (!out || out_sz == 0)
        return ESP_ERR_INVALID_ARG;

    out[0] = '\0';

    char tmp[STORAGE_MAX_VALUE_BYTES + 1];
    memset(tmp, 0, sizeof(tmp));

    esp_err_t e = storage_get_str_sync(ns, key, tmp, sizeof(tmp), STORE_TO);
    if (e == ESP_ERR_NOT_FOUND)
        return ESP_OK;
    if (e != ESP_OK)
        return e;

    size_t n = strnlen(tmp, out_sz - 1);
    memcpy(out, tmp, n);
    out[n] = '\0';
    
    return ESP_OK;
}

// -----------------------------------------------------------------------------
// Task / Main Loop
// -----------------------------------------------------------------------------
static void ocpp_task_func(void *param)
{
    (void)param;

    while (true)
    {
        if (enabled)
        {
            mg_mgr_poll(&mgr, 100);
            ocpp_loop();

            bool operative = ocpp_isOperative();
            if (operative != s_evse_enabled)
            {
                s_evse_enabled = operative;

                ocpp_operative_event_t ev = {
                    .operative = operative,
                    .timestamp_us = esp_timer_get_time()};
                esp_event_post(OCPP_EVENTS,
                               OCPP_EVENT_OPERATIVE_UPDATED,
                               &ev, sizeof(ev),
                               portMAX_DELAY);

                ESP_LOGI(TAG, "[OCPP] ChangeAvailability remoto → operative=%d", (int)operative);
            }
        }
        else
        {
            vTaskDelay(pdMS_TO_TICKS(500));
        }
    }
}

// -----------------------------------------------------------------------------
// Storage GETs
// -----------------------------------------------------------------------------
bool ocpp_get_enabled(void)
{
    storage_init_best_effort();

    uint8_t value = 0;
    esp_err_t err = storage_get_u8_sync(NVS_NAMESPACE, NVS_OCPP_ENABLED, &value, STORE_TO);

    if (err == ESP_ERR_NOT_FOUND)
        return false;
    if (err != ESP_OK)
    {
        ESP_LOGW(TAG, "storage_get_u8_sync(enabled) failed: %s", esp_err_to_name(err));
        return false;
    }
    return value != 0;
}

void ocpp_get_server(char *value /* out, size>=64 */)
{
    if (!value)
        return;
    value[0] = '\0';

    storage_init_best_effort();

    esp_err_t e = store_get_str_safe(NVS_NAMESPACE, NVS_OCPP_SERVER, value, 64);
    if (e != ESP_OK)
    {
        ESP_LOGW(TAG, "store_get_str_safe(server) failed: %s", esp_err_to_name(e));
        value[0] = '\0';
    }
}

void ocpp_get_charge_id(char *value /* out, size>=64 */)
{
    if (!value)
        return;
    value[0] = '\0';

    storage_init_best_effort();

    esp_err_t e = store_get_str_safe(NVS_NAMESPACE, NVS_OCPP_CHARGE_ID, value, 64);
    if (e != ESP_OK)
    {
        ESP_LOGW(TAG, "store_get_str_safe(charge_id) failed: %s", esp_err_to_name(e));
        value[0] = '\0';
    }
}

// -----------------------------------------------------------------------------
// Storage SETs
// -----------------------------------------------------------------------------
void ocpp_set_enabled(bool value)
{
    storage_init_best_effort();

    ESP_LOGI(TAG, "set enabled %d", value);

    esp_err_t e = store_set_u8_best_effort(NVS_NAMESPACE, NVS_OCPP_ENABLED, value ? 1 : 0);
    if (e != ESP_OK)
    {
        ESP_LOGE(TAG, "store_set_u8_best_effort(enabled) failed: %s", esp_err_to_name(e));
        return;
    }

    (void)store_flush_best_effort();
    enabled = value;
}

void ocpp_set_server(char *value)
{
    storage_init_best_effort();

    ESP_LOGI(TAG, "set server %s", value ? value : "(null)");

    esp_err_t e = store_set_str_best_effort(NVS_NAMESPACE, NVS_OCPP_SERVER, value ? value : "");
    if (e != ESP_OK)
    {
        ESP_LOGE(TAG, "store_set_str_best_effort(server) failed: %s", esp_err_to_name(e));
        return;
    }

    (void)store_flush_best_effort();
}

void ocpp_set_charge_id(char *value)
{
    storage_init_best_effort();

    ESP_LOGI(TAG, "set charge_id %s", value ? value : "(null)");

    esp_err_t e = store_set_str_best_effort(NVS_NAMESPACE, NVS_OCPP_CHARGE_ID, value ? value : "");
    if (e != ESP_OK)
    {
        ESP_LOGE(TAG, "store_set_str_best_effort(charge_id) failed: %s", esp_err_to_name(e));
        return;
    }

    (void)store_flush_best_effort();
}

// -----------------------------------------------------------------------------
// Event handlers (AUTH / EVSE / METER)
// -----------------------------------------------------------------------------
static void ocpp_on_auth_verify(void *arg, esp_event_base_t base, int32_t id, void *event_data)
{
    (void)arg;
    (void)base;
    (void)id;

    const auth_tag_verify_event_t *rq = (const auth_tag_verify_event_t *)event_data;
    if (!rq)
        return;

    char idtag[AUTH_TAG_MAX_LEN];
    if (rq->tag[0] == '\0')
    {
        strncpy(idtag, "IDTAG", sizeof(idtag));
        idtag[sizeof(idtag) - 1] = '\0';
    }
    else
    {
        strncpy(idtag, rq->tag, sizeof(idtag) - 1);
        idtag[sizeof(idtag) - 1] = '\0';
    }

    ESP_LOGI(TAG, "AUTH_EVENT_TAG_VERIFY: tag=%s req_id=%u", idtag, (unsigned)rq->req_id);

    if (!enabled || g_ocpp_conn == NULL)
    {
        ESP_LOGW(TAG, "OCPP not ready (enabled=%d, conn=%p) – ignoring verify",
                 enabled, (void *)g_ocpp_conn);
        return;
    }

    if (ocpp_isTransactionActive())
    {
        ESP_LOGI(TAG, "Transaction active -> ocpp_end_transaction(\"%s\")", idtag);
        ocpp_endTransaction(idtag, "Local");
    }
    else
    {
        ESP_LOGI(TAG, "No active transaction -> ocpp_begin_transaction(\"%s\")", idtag);
        ocpp_beginTransaction(idtag);
    }
}

static void evse_event_handler(void *arg, esp_event_base_t base, int32_t id, void *data)
{
    (void)arg;
    if (base != EVSE_EVENTS || id != EVSE_EVENT_STATE_CHANGED || data == NULL)
        return;

    const evse_state_event_data_t *evt = (const evse_state_event_data_t *)data;
    ESP_LOGI(TAG, "EVSE event received: state = %d", (int)evt->state);

    switch (evt->state)
    {
    case EVSE_STATE_EVENT_IDLE:
        s_ev_plugged = false;
        s_ev_ready = false;
        break;

    case EVSE_STATE_EVENT_WAITING:
        s_ev_plugged = true;
        s_ev_ready = false;
        break;

    case EVSE_STATE_EVENT_CHARGING:
        s_ev_plugged = true;
        s_ev_ready = true;
        break;

    case EVSE_STATE_EVENT_FAULT:
    default:
        s_ev_ready = false;
        break;
    }
}

static void evse_enable_available_handler(void *arg, esp_event_base_t base, int32_t id, void *data)
{
    (void)arg;
    if (base != EVSE_EVENTS || data == NULL)
        return;

    if (id == EVSE_EVENT_ENABLE_UPDATED)
    {
        const evse_enable_event_data_t *e = (const evse_enable_event_data_t *)data;
        s_evse_enabled = e->enabled;
        ESP_LOGI(TAG, "[EVSE] ENABLE_UPDATED: enabled=%d (ts=%lld)",
                 (int)e->enabled, (long long)e->timestamp_us);
        return;
    }

    if (id == EVSE_EVENT_AVAILABLE_UPDATED)
    {
        const evse_available_event_data_t *e = (const evse_available_event_data_t *)data;
        s_evse_available = e->available;
        ESP_LOGI(TAG, "[EVSE] AVAILABLE_UPDATED: available=%d (ts=%lld)",
                 (int)e->available, (long long)e->timestamp_us);
        return;
    }
}

static void on_meter_event(void *arg, esp_event_base_t base, int32_t id, void *data)
{
    (void)arg;

    if (base != METER_EVENT || id != METER_EVENT_DATA_READY || !data)
        return;

    const meter_event_data_t *evt = (const meter_event_data_t *)data;

    if (!evt->source || strcmp(evt->source, "EVSE") != 0)
        return;

    int32_t sum_w = (int32_t)evt->watt[0] + (int32_t)evt->watt[1] + (int32_t)evt->watt[2];
    float avg_v = (evt->vrms[0] + evt->vrms[1] + evt->vrms[2]) / 3.0f;
    float sum_i = evt->irms[0] + evt->irms[1] + evt->irms[2];

    portENTER_CRITICAL(&s_meter_mux);
    memcpy(s_meter.vrms, evt->vrms, sizeof(s_meter.vrms));
    memcpy(s_meter.irms, evt->irms, sizeof(s_meter.irms));
    s_meter.watt[0] = evt->watt[0];
    s_meter.watt[1] = evt->watt[1];
    s_meter.watt[2] = evt->watt[2];
    s_meter.frequency = evt->frequency;
    s_meter.power_factor = evt->power_factor;
    s_meter.total_energy_Wh = evt->total_energy;
    s_meter.sum_watt = sum_w;
    s_meter.avg_voltage = avg_v;
    s_meter.sum_current = sum_i;
    s_meter.have_data = true;
    portEXIT_CRITICAL(&s_meter_mux);
}

// -----------------------------------------------------------------------------
// MicroOCPP Inputs/CBs
// -----------------------------------------------------------------------------
bool setConnectorPluggedInput(void)
{
    return s_ev_plugged;
}

bool setEvReadyInput(void)
{
    return s_ev_ready;
}

bool setEvseReadyInput(void)
{
    return s_evse_enabled && s_evse_available;
}

float setPowerMeterInput(void)
{
    int32_t w = 0;
    bool have = false;

    portENTER_CRITICAL(&s_meter_mux);
    have = s_meter.have_data;
    if (have)
        w = s_meter.sum_watt;
    portEXIT_CRITICAL(&s_meter_mux);

    if (!have)
        ESP_LOGW(TAG, "[METER] PowerMeterInput: no data (return 0)");
    else
        ESP_LOGD(TAG, "[METER] PowerMeterInput: %" PRId32 " W", w);

    return (float)w;
}

float setEnergyMeterInput(void)
{
    float wh = 0.0f;
    bool have = false;

    portENTER_CRITICAL(&s_meter_mux);
    have = s_meter.have_data;
    if (have)
        wh = s_meter.total_energy_Wh;
    portEXIT_CRITICAL(&s_meter_mux);

    if (!have)
        ESP_LOGW(TAG, "[METER] EnergyMeterInput: no data (return 0)");
    else
        ESP_LOGD(TAG, "[METER] EnergyMeterInput: (%.1f Wh)", wh);

    return wh;
}

int setEnergyInput(void)
{
    float wh = setEnergyMeterInput();
    int wh_i = (int)lrintf((double)wh);
    ESP_LOGD(TAG, "[METER] EnergyInput: %.1f Wh", wh);
    return wh_i;
}

float setCurrentInput(void)
{
    float a = 0.0f;
    bool have = false;

    portENTER_CRITICAL(&s_meter_mux);
    have = s_meter.have_data;
    if (have)
        a = s_meter.sum_current;
    portEXIT_CRITICAL(&s_meter_mux);

    if (!have)
        ESP_LOGW(TAG, "[METER] CurrentInput: no data (return 0)");
    else
        ESP_LOGD(TAG, "[METER] CurrentInput: %.2f A (total)", a);

    return a;
}

float setVoltageInput(void)
{
    float v = 0.0f;
    bool have = false;

    portENTER_CRITICAL(&s_meter_mux);
    have = s_meter.have_data;
    if (have)
        v = s_meter.avg_voltage;
    portEXIT_CRITICAL(&s_meter_mux);

    if (!have)
        ESP_LOGW(TAG, "[METER] VoltageInput: no data (return 0)");
    else
        ESP_LOGD(TAG, "[METER] VoltageInput: %.1f V (avg)", v);

    return v;
}

float setPowerInput(void)
{
    float w = setPowerMeterInput();
    ESP_LOGD(TAG, "[METER] PowerInput: %.1f W", w);
    return w;
}

float setTemperatureInput(void)
{
    ESP_LOGD(TAG, "TemperatureInput");
    return 16.5f;
}

void setSmartChargingCurrentOutput(float limit)
{
    ESP_LOGI(TAG, "SmartChargingCurrentOutput: %.0f", limit);
}

void setSmartChargingPowerOutput(float limit)
{
    ESP_LOGI(TAG, "SmartChargingPowerOutput: %.0f", limit);
}

void setSmartChargingOutput(float power, float current, int nphases)
{
    ESP_LOGI(TAG, "SmartChargingOutput: P=%.0f W, I=%.0f A, phases=%d", power, current, nphases);
}

void setGetConfiguration(const char *payload, size_t len)
{
    ESP_LOGI(TAG, "GetConfiguration: %.*s (%u)", (int)len, payload, (unsigned)len);
}

void setStartTransaction(const char *payload, size_t len)
{
    ESP_LOGI(TAG, "StartTransaction: %.*s (%u)", (int)len, payload, (unsigned)len);
}

void setChangeConfiguration(const char *payload, size_t len)
{
    ESP_LOGI(TAG, "ChangeConfiguration: %.*s (%u)", (int)len, payload, (unsigned)len);
}

void OnResetExecute(bool state)
{
    ESP_LOGI(TAG, "OnResetExecute (state=%d)", state);
    esp_restart();
}

bool setOccupiedInput(void)
{
    ESP_LOGD(TAG, "setOccupiedInput");
    return false;
}

bool setStartTxReadyInput(void)
{
    ESP_LOGD(TAG, "setStartTxReadyInput");
    return true;
}

bool setStopTxReadyInput(void)
{
    ESP_LOGD(TAG, "setStopTxReadyInput");
    return true;
}

bool setOnResetNotify(bool value)
{
    ESP_LOGI(TAG, "setOnResetNotify %d", value);
    return true;
}

void notificationOutput(OCPP_Transaction *transaction, enum OCPP_TxNotification txNotification)
{
    (void)transaction;

    ESP_LOGI(TAG, "TxNotification: %d", txNotification);

    switch (txNotification)
    {
    case Authorized:
        ESP_LOGI(TAG, "Authorized");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_AUTHORIZED, NULL, 0, portMAX_DELAY);
        break;

    case AuthorizationRejected:
        ESP_LOGI(TAG, "AuthorizationRejected");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_AUTH_REJECTED, NULL, 0, portMAX_DELAY);
        break;

    case AuthorizationTimeout:
        ESP_LOGI(TAG, "AuthorizationTimeout");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_AUTH_TIMEOUT, NULL, 0, portMAX_DELAY);
        break;

    case ReservationConflict:
        ESP_LOGI(TAG, "ReservationConflict");
        break;

    case ConnectionTimeout:
        ESP_LOGI(TAG, "ConnectionTimeout");
        break;

    case DeAuthorized:
        ESP_LOGI(TAG, "DeAuthorized");
        break;

    case RemoteStart:
        ESP_LOGI(TAG, "RemoteStart");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_REMOTE_START, NULL, 0, portMAX_DELAY);
        break;

    case RemoteStop:
        ESP_LOGI(TAG, "RemoteStop");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_REMOTE_STOP, NULL, 0, portMAX_DELAY);
        break;

    case StartTx:
        ESP_LOGI(TAG, "StartTx");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_START_TX, NULL, 0, portMAX_DELAY);
        break;

    case StopTx:
        ESP_LOGI(TAG, "StopTx");
        esp_event_post(OCPP_EVENTS, OCPP_EVENT_STOP_TX, NULL, 0, portMAX_DELAY);
        break;
    }
}

bool ocpp_is_connected(void)
{
    return g_ocpp_conn != NULL;
}

const char *addErrorCodeInput(void)
{
    const char *ptr = NULL;
    uint32_t error = evse_get_error();

    if (error & EVSE_ERR_PILOT_FAULT_BIT)
        ptr = "InternalError";
    else if (error & EVSE_ERR_DIODE_SHORT_BIT)
        ptr = "InternalError";
    else if (error & EVSE_ERR_LOCK_FAULT_BIT)
        ptr = "ConnectorLockFailure";
    else if (error & EVSE_ERR_UNLOCK_FAULT_BIT)
        ptr = "ConnectorLockFailure";
    else if (error & EVSE_ERR_RCM_TRIGGERED_BIT)
        ptr = "OtherError";
    else if (error & EVSE_ERR_RCM_SELFTEST_FAULT_BIT)
        ptr = "OtherError";
    else if (error & EVSE_ERR_TEMPERATURE_HIGH_BIT)
        ptr = "HighTemperature";
    else if (error & EVSE_ERR_TEMPERATURE_FAULT_BIT)
        ptr = "OtherError";

    return ptr;
}

// -----------------------------------------------------------------------------
// Start / Stop OCPP
// -----------------------------------------------------------------------------
void ocpp_start(void)
{
    ESP_LOGI(TAG, "Starting OCPP");

    if (ocpp_task != NULL)
    {
        ESP_LOGW(TAG, "OCPP already running");
        return;
    }

    storage_init_best_effort();

    enabled = ocpp_get_enabled();
    if (!enabled)
    {
        ESP_LOGW(TAG, "OCPP disabled");
        return;
    }

    char serverstr[64] = {0};
    ocpp_get_server(serverstr);
    if (serverstr[0] == '\0')
    {
        ESP_LOGW(TAG, "No OCPP server configured. Skipping connection.");
        return;
    }

    char charge_id[64] = {0};
    ocpp_get_charge_id(charge_id);
    if (charge_id[0] == '\0')
    {
        ESP_LOGW(TAG, "No OCPP charge_id configured. Skipping connection.");
        return;
    }

    mg_mgr_init(&mgr);
    mg_log_set(MG_LL_ERROR);

    struct OCPP_FilesystemOpt fsopt = {.use = true, .mount = true, .formatFsOnFail = true};

    g_ocpp_conn = ocpp_makeConnection(&mgr,
                                      serverstr,
                                      charge_id,
                                      "",
                                      "",
                                      fsopt);
    if (!g_ocpp_conn)
    {
        ESP_LOGE(TAG, "ocpp_makeConnection failed");
        mg_mgr_free(&mgr);
        return;
    }

    ocpp_initialize(g_ocpp_conn, "EPower M1", "Plixin", fsopt, false);

    ocpp_setEvReadyInput(&setEvReadyInput);
    ocpp_setEvseReadyInput(&setEvseReadyInput);
    ocpp_setConnectorPluggedInput(&setConnectorPluggedInput);
    ocpp_setOnResetExecute(&OnResetExecute);
    ocpp_setTxNotificationOutput(&notificationOutput);
    ocpp_setStopTxReadyInput(&setStopTxReadyInput);
    ocpp_setOnResetNotify(&setOnResetNotify);

    ocpp_setEnergyMeterInput(&setEnergyInput);

    ocpp_addMeterValueInputFloat(&setCurrentInput, "Current.Import", "A", NULL, NULL);
    ocpp_addMeterValueInputFloat(&getCurrentOffered, "Current.Offered", "A", NULL, NULL);
    ocpp_addMeterValueInputFloat(&setVoltageInput, "Voltage", "V", NULL, NULL);
    ocpp_addMeterValueInputFloat(&setTemperatureInput, "Temperature", "Celsius", NULL, NULL);
    ocpp_addMeterValueInputFloat(&setPowerMeterInput, "Power.Active.Import", "W", NULL, NULL);
    ocpp_addMeterValueInputFloat(&setEnergyMeterInput, "Energy.Active.Import.Register", "Wh", NULL, NULL);

    ocpp_addErrorCodeInput(&addErrorCodeInput);

    xTaskCreate(ocpp_task_func, "ocpp_task", 5 * 1024, NULL, 3, &ocpp_task);

    if (!s_auth_verify_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_register(
            AUTH_EVENTS, AUTH_EVENT_TAG_VERIFY,
            &ocpp_on_auth_verify, NULL, &s_auth_verify_inst));
        ESP_LOGI(TAG, "Registered AUTH_EVENT_TAG_VERIFY listener");
    }

    if (!s_evse_state_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_register(
            EVSE_EVENTS, EVSE_EVENT_STATE_CHANGED,
            &evse_event_handler, NULL, &s_evse_state_inst));
    }

    if (!s_evse_enable_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_register(
            EVSE_EVENTS, EVSE_EVENT_ENABLE_UPDATED,
            &evse_enable_available_handler, NULL, &s_evse_enable_inst));
    }
    if (!s_evse_available_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_register(
            EVSE_EVENTS, EVSE_EVENT_AVAILABLE_UPDATED,
            &evse_enable_available_handler, NULL, &s_evse_available_inst));
    }

    if (!s_meter_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_register(
            METER_EVENT, METER_EVENT_DATA_READY,
            &on_meter_event, NULL, &s_meter_inst));
        ESP_LOGI(TAG, "Registered METER_EVENT_DATA_READY listener (EVSE source)");
    }
}

void ocpp_stop(void)
{
    ESP_LOGI(TAG, "Stopping OCPP");

    if (ocpp_task)
    {
        vTaskDelete(ocpp_task);
        ocpp_task = NULL;
    }

    ocpp_deinitialize();

    if (g_ocpp_conn)
    {
        ocpp_deinitConnection(g_ocpp_conn);
        g_ocpp_conn = NULL;
    }

    mg_mgr_free(&mgr);

    if (s_auth_verify_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
            AUTH_EVENTS, AUTH_EVENT_TAG_VERIFY, s_auth_verify_inst));
        s_auth_verify_inst = NULL;
    }

    if (s_evse_state_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
            EVSE_EVENTS, EVSE_EVENT_STATE_CHANGED, s_evse_state_inst));
        s_evse_state_inst = NULL;
    }

    if (s_evse_enable_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
            EVSE_EVENTS, EVSE_EVENT_ENABLE_UPDATED, s_evse_enable_inst));
        s_evse_enable_inst = NULL;
    }
    if (s_evse_available_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
            EVSE_EVENTS, EVSE_EVENT_AVAILABLE_UPDATED, s_evse_available_inst));
        s_evse_available_inst = NULL;
    }
    if (s_meter_inst)
    {
        ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
            METER_EVENT, METER_EVENT_DATA_READY, s_meter_inst));
        s_meter_inst = NULL;
    }
}