#include <stdio.h>
#include <string.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "esp_vfs.h"
#include "JSON_helpers.h" // Include your JSON helper functions
#include "cJSON.h" // Include cJSON library

static const char *TAG = "JSON_WEATHER_DEMO"; // Tag for logging

#define WEATHER_JSON_PATH   "/spiffs/weather_data.json" // Path to the weather_data.json file

int json_get_int(cJSON *obj, const char *key, int defval) // Retrieve an integer value from a JSON object by key
{
    cJSON *it = cJSON_GetObjectItem(obj, key);
    if (it != NULL && cJSON_IsNumber(it)) {
        return it->valueint;
    } else {
        return defval;
    }
}

const char *json_get_str(cJSON *obj, const char *key, const char *defval) // Retrieve a string value from a JSON object by key
{
    cJSON *it = cJSON_GetObjectItem(obj, key);
    if (it != NULL && cJSON_IsString(it)) {
        return it->valuestring;
    } else {
        return defval;
    }
}

void app_main(void)

{

fs_mount_or_die(); // Mount the filesystem or terminate if it fails

// Create JSON object
    cJSON *root = cJSON_CreateObject();
    if (root == NULL) {
    ESP_LOGE(TAG, "Failed to create cJSON object");
    return;
}

 // Fake sensor readings
    int pot_raw = 2500;          // pretend potentiometer value
    int temperature_c = 23;      // pretend 23°C
    int humidity_percent = 45;   // pretend 45% RH

    cJSON_AddStringToObject(root, "device", "ESP32S3_WeatherNode");
    cJSON_AddNumberToObject(root, "pot_raw", pot_raw);
    cJSON_AddNumberToObject(root, "temperature_c", temperature_c);
    cJSON_AddNumberToObject(root, "humidity_percent", humidity_percent);
    cJSON_AddStringToObject(root, "status", "OK");

// STEP 3: Save JSON to file using your helper
    save_json(WEATHER_JSON_PATH, root);

// JSON object is no longer needed after saving
    cJSON_Delete(root);

    ESP_LOGI(TAG, "Wrote demo JSON to %s", WEATHER_JSON_PATH);
    fs_print_file(WEATHER_JSON_PATH);   // Print JSON file to terminal

// STEP 4: Read JSON file back into a buffer
    char buffer[256] = {0};
    if (!read_small_file(WEATHER_JSON_PATH, buffer, sizeof(buffer))) {
        ESP_LOGE(TAG, "Failed to read back %s", WEATHER_JSON_PATH);
        return;
    }

// STEP 5: Parse JSON string into cJSON object
    cJSON *parsed = cJSON_Parse(buffer);
    if (parsed == NULL) {
        ESP_LOGE(TAG, "Failed to parse JSON from %s", WEATHER_JSON_PATH);
        return;
    }

// STEP 6: Read values using helper functions

    const char *device = json_get_str(parsed, "device", "unknown");
    pot_raw = json_get_int(parsed, "pot_raw", -1);
    temperature_c = json_get_int(parsed, "temperature_c", -100);
    humidity_percent = json_get_int(parsed, "humidity_percent", -1);
    const char *status = json_get_str(parsed, "status", "UNKNOWN");

// STEP 7: Print values to serial monitor
    ESP_LOGI(TAG, "Device           : %s", device);
    ESP_LOGI(TAG, "Pot raw          : %d", pot_raw);
    ESP_LOGI(TAG, "Temperature (C)  : %d", temperature_c);
    ESP_LOGI(TAG, "Humidity (%%)     : %d", humidity_percent);
    ESP_LOGI(TAG, "Status           : %s", status);

// Clean up parsed JSON object
    cJSON_Delete(parsed);

// Delay for 1000 ms (1000 ms / portTICK_PERIOD_MS)
    vTaskDelay(1000 / portTICK_PERIOD_MS);

}