/**
 * @file main.c
 * @brief Main entry point for Smart Oil Heating Control System.
 *
 * This file initializes all system modules and handles initialization
 * errors by logging diagnostic information and triggering a reboot.
 */

#include "safety.h"
#include "metrics.h"
#include "outputs.h"
#include "inputs.h"
#include "control.h"
#include "wifi.h"
#include "sntp.h"

#include "esp_log.h"
#include "esp_system.h"
#include "nvs_flash.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

static const char *TAG = "main";

/** @brief Delay before reboot in milliseconds. */
#define REBOOT_DELAY_MS 5000

/**
 * @brief Log error and trigger system reboot.
 * @param module Name of the module that failed.
 */
static void reboot_on_error(const char *module)
{
    ESP_LOGE(TAG, "========================================");
    ESP_LOGE(TAG, "FATAL: %s initialization failed!", module);
    ESP_LOGE(TAG, "System will reboot in %d seconds...", REBOOT_DELAY_MS / 1000);
    ESP_LOGE(TAG, "========================================");

    vTaskDelay(pdMS_TO_TICKS(REBOOT_DELAY_MS));
    esp_restart();
}

/**
 * @brief Application main entry point.
 */
void app_main(void)
{
    ESP_LOGI(TAG, "========================================");
    ESP_LOGI(TAG, "Smart Oil Heating Control System");
    ESP_LOGI(TAG, "Starting initialization...");
    ESP_LOGI(TAG, "========================================");

    /* Initialize NVS */
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
    {
        ESP_LOGW(TAG, "NVS partition needs erase, erasing...");
        ESP_ERROR_CHECK(nvs_flash_erase());
        ret = nvs_flash_init();
    }
    if (ret != ESP_OK)
    {
        ESP_LOGE(TAG, "NVS init failed: %s", esp_err_to_name(ret));
        reboot_on_error("NVS");
    }
    ESP_LOGI(TAG, "[OK] NVS initialized");

    /* Initialize Outputs */
    if (initOutputs() != ESP_OK)
    {
        reboot_on_error("Outputs");
    }
    ESP_LOGI(TAG, "[OK] Outputs initialized");

    /* Initialize Inputs */
    if (initInputs() != ESP_OK)
    {
        reboot_on_error("Inputs");
    }
    ESP_LOGI(TAG, "[OK] Inputs initialized");

    /* Initialize Safety */
    if (initSafety() != ESP_OK)
    {
        reboot_on_error("Safety");
    }
    ESP_LOGI(TAG, "[OK] Safety initialized");

    /* Initialize WiFi */
    if (initWifi() != ESP_OK)
    {
        reboot_on_error("WiFi");
    }
    ESP_LOGI(TAG, "[OK] WiFi initialized");

    /* Initialize SNTP */
    if (initSntp() != ESP_OK)
    {
        reboot_on_error("SNTP");
    }
    ESP_LOGI(TAG, "[OK] SNTP initialized");

    /* Initialize Control */
    if (initControl() != ESP_OK)
    {
        reboot_on_error("Control");
    }
    ESP_LOGI(TAG, "[OK] Control initialized");

    /* Initialize Metrics */
    if (initMetrics() != ESP_OK)
    {
        reboot_on_error("Metrics");
    }
    ESP_LOGI(TAG, "[OK] Metrics initialized");

    ESP_LOGI(TAG, "========================================");
    ESP_LOGI(TAG, "All modules initialized successfully!");
    ESP_LOGI(TAG, "System is now running.");
    ESP_LOGI(TAG, "========================================");

    while (1)
    {
        vTaskDelay(pdMS_TO_TICKS(1000));
        // Do nothing ;-)
    }
}