#include <WiFi.h>

#include "ThingSpeak.h"

const int MOTION =2 ;
const int LED_PIN = 12;
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2271286;
const char* myApiKey = "HQMDE9VNUPRD4PUY";
const char* server = "api.thingspeak.com";

const char * myTalkBackKey = "I2PAJWRYA2O204A7";
unsigned long myTalkBackID = 50045;


int motionReal;
WiFiClient client;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
 pinMode(MOTION, INPUT);
 pinMode(LED_PIN, OUTPUT);
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}



void loop() {
   
  motionReal = digitalRead(MOTION);
  ThingSpeak.setField(1,motionReal);
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  if(motionReal == LOW)
  {
    digitalWrite(LED_PIN, HIGH);
  }
  if(x == 200){
    Serial.println("Data pushed successfull");
  }else{
    Serial.println("Push error" + String(x));
  }
  Serial.println("---");
  String tbURI = String("/talkbacks/") + String(myTalkBackID) + String("/commands/execute");
  String postMessage =  String("api_key=") + String(myTalkBackKey);
  String newCommand = String();
  // Make the POST to ThingSpeak
  int y = httpPOST(tbURI, postMessage, newCommand);
  client.stop();
  // Check the result
  if(y == 200){
    Serial.println("checking queue..."); 
    // check for a command returned from TalkBack
    if(newCommand.indexOf("motion on") == -1 && newCommand.indexOf("motion off") == -1){
      Serial.println("  No command or syntax error!");
    } else{
      if(newCommand.indexOf("motion on") != -1){
        Serial.println("  New command: Turn motion on");
        digitalWrite(MOTION, HIGH);
      } else if(newCommand.indexOf("motion off") != -1){
        Serial.println("  New command: Turn motion off");
        digitalWrite(MOTION, LOW);
      }
    }
  }  else{
    Serial.println("Problem checking queue. HTTP error code " + String(x));
  }
  delay(1000); // this speeds up the simulation
}
int httpPOST(String uri, String postMessage, String &response){

  bool connectSuccess = false;
  connectSuccess = client.connect("api.thingspeak.com",80);

  if(!connectSuccess){
      return -301;   
  }
  
  postMessage += "&headers=false";
  
  String Headers =  String("POST ") + uri + String(" HTTP/1.1\r\n") +
                    String("Host: api.thingspeak.com\r\n") +
                    String("Content-Type: application/x-www-form-urlencoded\r\n") +
                    String("Connection: close\r\n") +
                    String("Content-Length: ") + String(postMessage.length()) +
                    String("\r\n\r\n");

  client.print(Headers);
  client.print(postMessage);

  long startWaitForResponseAt = millis();
  while(client.available() == 0 && millis() - startWaitForResponseAt < 5000){
      delay(100);
  }

  if(client.available() == 0){       
    return -304; // Didn't get server response in time
  }

  if(!client.find(const_cast<char *>("HTTP/1.1"))){
      return -303; // Couldn't parse response (didn't find HTTP/1.1)
  }
  
  int status = client.parseInt();
  if(status != 200){
    return status;
  }

  if(!client.find(const_cast<char *>("\n\r\n"))){
    return -303;
  }
  String tempString = String(client.readString());
  response = tempString;
  return status; 
}