#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

char *gnss = "3,14,,00,01,3352.92149,S,01840.63139,E,291123,194213.00,105.6,0.454,,3.0,1.3,2.6";
const String gnssND = ",,,,,,,,";
const char *duuid = "123456";

HTTPClient http;

struct trackdata{
  char *device_id;
  char *lon;  
  char *lat;
  char *cap_time;
  char *cap_date;
  char *speed;
  char *heading;
  char *fix_type;
};

void postdata(String data)
{
  http.begin("http://192.168.110.189:3000/");
  http.addHeader("Content-Type", "text/plain");

int httpResponseCode = http.POST(data);
Serial.println(httpResponseCode);

}

char* parsegnssdata (char *gnssdata)
{
 DynamicJsonDocument trackjson(2048);



// serializeJson(doc, Serial);

  trackjson["type"] = "LOCATION UPDATE";
  trackjson["device_id"] = duuid;
  trackjson["lon"] = getValue(gnssdata,',',5);
  trackjson["lat"] = getValue(gnssdata,',',7);
  trackjson["cap_time"] = getValue(gnssdata,',',10);
  trackjson["cap_date"] = getValue(gnssdata,',',9);
  trackjson["speed"] = getValue(gnssdata,',',12);
  trackjson["heading"] = getValue(gnssdata,',',11);
  trackjson["fix_type"] = getValue(gnssdata,',',0);
 
 size_t len = measureJson(trackjson); // returns 17

size_t size = len+1;

  char returndata[size];
  serializeJson(trackjson,returndata,size);

  Serial.println(returndata);
  return strdup(returndata);

  
}

String getValue(String data, char separator, int index)
{
  int found = 0;
  int strIndex[] = {0, -1};
  int maxIndex = data.length()-1;

  for(int i=0; i<=maxIndex && found<=index; i++){
    if(data.charAt(i)==separator || i==maxIndex){
        found++;
        strIndex[0] = strIndex[1]+1;
        strIndex[1] = (i == maxIndex) ? i+1 : i;
    }
  }

  return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32-S3!");

    WiFi.mode(WIFI_STA); //Optional
    WiFi.begin(ssid, password);
    Serial.println("\nConnecting");

    while(WiFi.status() != WL_CONNECTED){
        Serial.print(".");
        delay(100);
    }

    Serial.println("\nConnected to the WiFi network");
    Serial.print("Local ESP32 IP: ");
    Serial.println(WiFi.localIP());
    char *postgnss = parsegnssdata(gnss);
    Serial.println(postgnss);
    postdata(postgnss);

}

void loop() {
  // // put your main code here, to run repeatedly:
  
  // Serial.println(getValue(gnss,',',0));
  // if (getValue(gnssND,',',0) == ""){
  //   Serial.println("no data");
  // }
  // delay(1000); // this speeds up the simulation
}