/*
   v@1.0.4
   • Wifi Hotspot No Hardcoded
*/
#include <WiFiManager.h>    // https://github.com/tzapu/WiFiManager
#include <otadrive_esp.h>
#include <WiFi.h>
#include "WiFiClientSecure.h"
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
#include <OneWire.h>
#include <DallasTemperature.h>



#define code_version "v@1.0.4"

/************************* WiFi Access Point *********************************/

//#define WLAN_SSID "OBESEGAS"
//#define WLAN_PASS "12345@ABCDE"

/************************* Adafruit.io Setup *********************************/

#define AIO_SERVER "io.adafruit.com"

// Using port 8883 for MQTTS
#define AIO_SERVERPORT 8883

// Adafruit IO Account Configuration
// (to obtain these values, visit https://io.adafruit.com and click on Active Key)
#define AIO_USERNAME "GJeddah12233"
#define AIO_KEY "aio_oqRs03If7NMF8uSFRQ35jCnev3tX"

/************ Global State (you don't need to change this!) ******************/

// WiFiFlientSecure for SSL/TLS support
WiFiClientSecure clientmqtt;

// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
Adafruit_MQTT_Client mqtt(&clientmqtt, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);

// io.adafruit.com root CA
const char* adafruitio_root_ca = \
                                 "-----BEGIN CERTIFICATE-----\n"
                                 "MIIEjTCCA3WgAwIBAgIQDQd4KhM/xvmlcpbhMf/ReTANBgkqhkiG9w0BAQsFADBh\n"
                                 "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n"
                                 "d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH\n"
                                 "MjAeFw0xNzExMDIxMjIzMzdaFw0yNzExMDIxMjIzMzdaMGAxCzAJBgNVBAYTAlVT\n"
                                 "MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n"
                                 "b20xHzAdBgNVBAMTFkdlb1RydXN0IFRMUyBSU0EgQ0EgRzEwggEiMA0GCSqGSIb3\n"
                                 "DQEBAQUAA4IBDwAwggEKAoIBAQC+F+jsvikKy/65LWEx/TMkCDIuWegh1Ngwvm4Q\n"
                                 "yISgP7oU5d79eoySG3vOhC3w/3jEMuipoH1fBtp7m0tTpsYbAhch4XA7rfuD6whU\n"
                                 "gajeErLVxoiWMPkC/DnUvbgi74BJmdBiuGHQSd7LwsuXpTEGG9fYXcbTVN5SATYq\n"
                                 "DfbexbYxTMwVJWoVb6lrBEgM3gBBqiiAiy800xu1Nq07JdCIQkBsNpFtZbIZhsDS\n"
                                 "fzlGWP4wEmBQ3O67c+ZXkFr2DcrXBEtHam80Gp2SNhou2U5U7UesDL/xgLK6/0d7\n"
                                 "6TnEVMSUVJkZ8VeZr+IUIlvoLrtjLbqugb0T3OYXW+CQU0kBAgMBAAGjggFAMIIB\n"
                                 "PDAdBgNVHQ4EFgQUlE/UXYvkpOKmgP792PkA76O+AlcwHwYDVR0jBBgwFoAUTiJU\n"
                                 "IBiV5uNu5g/6+rkS7QYXjzkwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQGCCsG\n"
                                 "AQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAGAQH/AgEAMDQGCCsGAQUFBwEB\n"
                                 "BCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMEIGA1Ud\n"
                                 "HwQ7MDkwN6A1oDOGMWh0dHA6Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEds\n"
                                 "b2JhbFJvb3RHMi5jcmwwPQYDVR0gBDYwNDAyBgRVHSAAMCowKAYIKwYBBQUHAgEW\n"
                                 "HGh0dHBzOi8vd3d3LmRpZ2ljZXJ0LmNvbS9DUFMwDQYJKoZIhvcNAQELBQADggEB\n"
                                 "AIIcBDqC6cWpyGUSXAjjAcYwsK4iiGF7KweG97i1RJz1kwZhRoo6orU1JtBYnjzB\n"
                                 "c4+/sXmnHJk3mlPyL1xuIAt9sMeC7+vreRIF5wFBC0MCN5sbHwhNN1JzKbifNeP5\n"
                                 "ozpZdQFmkCo+neBiKR6HqIA+LMTMCMMuv2khGGuPHmtDze4GmEGZtYLyF8EQpa5Y\n"
                                 "jPuV6k2Cr/N3XxFpT3hRpt/3usU/Zb9wfKPtWpoznZ4/44c1p9rzFcZYrWkj3A+7\n"
                                 "TNBJE0GmP2fhXhP1D/XVfIW/h0yCJGEiV9Glm/uGOa3DXHlmbAcxSyCRraG+ZBkA\n"
                                 "7h4SeM6Y8l/7MBRpPCz6l8Y=\n"
                                 "-----END CERTIFICATE-----\n";

/****************************** Feeds ***************************************/

Adafruit_MQTT_Publish Pressure_Publish             = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Pressure");
Adafruit_MQTT_Publish Temperature_Inside_Publish   = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Temperature_Inside");
Adafruit_MQTT_Publish Temperature_Outside_Publish  = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Temperature_Outside");
Adafruit_MQTT_Publish MQ135_CO2_Publish            = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/MQ135_CO2");
Adafruit_MQTT_Publish MQ4_Methane_Publish          = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/MQ4_Methane");

/************************* I/O Pin Definitions *****************************/

#define Pressure_pin     32
#define MQ135_pin        34 // CO2 Gas Sensor
#define MQ4_pin          35 // Methane Gas Sensor
#define ONE_WIRE_BUS      4 // Temperature Sensors

/********************** Global Variables and Objects ***********************/

unsigned long previousMillis1 = 0;
unsigned long previousMillis2 = 0;
float pressureZero = 409.5; //analog reading of pressure transducer at (0 psi)
float pressureMax = 3685.5; //analog reading of pressure transducer at (100 psi)
float pressureValue = 0;
float Temp_Inside = 0;
float Temp_Outside = 0;
float Pressure_RAW_Reading = 0;
int MQ135_gas_RAW_Reading_CO2 = 0;
int MQ4_gas_RAW_Reading_Methane = 0;
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
DeviceAddress insideThermometer  = { 0x28, 0xB5, 0x27, 0x94, 0x97, 0x04, 0x03, 0x3F };//[Tank/Inside]
DeviceAddress outsideThermometer = { 0x28, 0x30, 0x16, 0x94, 0x97, 0x0A, 0x03, 0xAB };//[Box/Outside]

/*************************** Sketch Code ************************************/

void setup() {

  Serial.begin(115200);
  Initialize_Sensors();
  Connect_To_WiFi();
  Connect_To_WiFi_And_MQTT_Server();
  OTADRIVE.setInfo("397b2ca6-458a-438e-8f24-29506888c9ce", code_version);
  Serial.print("Code Version: ");
  Serial.println(code_version);

}

void loop() {
  ReConnect_To_WiFi();
  ota();
  MQTT_connect();
  Read_Sensor_Data();
  if (millis() - previousMillis1 >= 1000) {
    previousMillis1 = millis();
    Show_Sensor_Data_on_Serial_Monitor();
    Serial.println("Show Data Every 1 Second");
    Serial.println("-----------------------------");
  }
  if (millis() - previousMillis2 >= 12000) {
    previousMillis2 = millis();
    Publish_Sensor_Data();
    Serial.println("*************************************************");
    Serial.println("Data Published to IOT Cloud Every 12 Seconds");
    Serial.println("*************************************************");
  }
}

/*************************** Functions ************************************/

void Initialize_Sensors() {
  pinMode(Pressure_pin, INPUT);
  pinMode(MQ135_pin, INPUT);
  pinMode(MQ4_pin, INPUT);
  sensors.begin();
  sensors.setResolution(insideThermometer, 9);
  sensors.setResolution(outsideThermometer, 9);

}

float GetTemperature(DeviceAddress deviceAddress) {
  float tempC = sensors.getTempC(deviceAddress);
  return tempC;
}

void Read_Sensor_Data() {
  sensors.requestTemperatures();
  pressureValue = analogRead(Pressure_pin);
  pressureValue = map(pressureValue, pressureZero, pressureMax, 0, 100); // 0 psi to 100 psi
  Temp_Inside = sensors.getTempC(insideThermometer);//GetTemperature(insideThermometer);                        // -10°C to +85°C
  Temp_Outside = sensors.getTempC(outsideThermometer);//GetTemperature(outsideThermometer);                      // -10°C to +85°C
  MQ135_gas_RAW_Reading_CO2 = analogRead(MQ135_pin);                      //     0 to 4096
  MQ4_gas_RAW_Reading_Methane = analogRead(MQ4_pin);                      //     0 to 4096

}

void Show_Sensor_Data_on_Serial_Monitor() {

  Serial.print("Pressure: ");
  Serial.print(pressureValue, 1);
  Serial.println(" [psi]");
  Serial.print("Temperature[Tank/Inside]: ");
  Serial.print(Temp_Inside);
  Serial.println(" [°C]");
  Serial.print("Temperature[Box/Outside]: ");
  Serial.print(Temp_Outside);
  Serial.println(" [°C]");
  Serial.print("Gas CO2: ");
  Serial.print(MQ135_gas_RAW_Reading_CO2);
  Serial.println(" [VoltageLevel]");
  Serial.print("Gas Methane: ");
  Serial.print(MQ4_gas_RAW_Reading_Methane);
  Serial.println(" [VoltageLevel]");
  Serial.println("-----------------------------");

}

void Publish_Sensor_Data() {

  MQTT_connect();

  Pressure_Publish.publish(pressureValue);
  Temperature_Inside_Publish.publish(Temp_Inside);
  Temperature_Outside_Publish.publish(Temp_Outside);
  MQ135_CO2_Publish.publish(MQ135_gas_RAW_Reading_CO2);
  MQ4_Methane_Publish.publish(MQ4_gas_RAW_Reading_Methane);

}

void MQTT_connect() {
  int8_t ret;

  // Stop if already connected.
  if (mqtt.connected()) {
    return;
  }

  Serial.print("Connecting to MQTT... ");

  uint8_t retries = 2500;
  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
    Serial.println(mqtt.connectErrorString(ret));
    Serial.println("Retrying MQTT connection in 5 seconds...");
    mqtt.disconnect();
    delay(5000);  // wait 5 seconds
    retries--;
    //if (retries == 0) {
    // basically die and wait for WDT to reset me
    //while (1);
    //}
  }

  Serial.println("MQTT Connected!");
}

void Connect_To_WiFi_And_MQTT_Server() {
  delay(10);
  Serial.println(F("Adafruit IO MQTTS (SSL/TLS) Example"));
  /*
    // Connect to WiFi access point.
    Serial.println();
    Serial.println();
    Serial.print("Connecting to ");
    Serial.println(WLAN_SSID);
    delay(1000);
    WiFi.begin(WLAN_SSID, WLAN_PASS);
    delay(2000);
    while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    }
    Serial.println();
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
  */
  // Set Adafruit IO's root CA
  clientmqtt.setCACert(adafruitio_root_ca);
}

void ota()
{
  if (OTADRIVE.timeTick(30))
  {
    OTADRIVE.updateFirmware();
  }
}


void ReConnect_To_WiFi() {
  while (WiFi.status() != WL_CONNECTED) {
    //delay(500);
    Serial.print(".");
    Connect_To_WiFi();
  }
}

void Connect_To_WiFi() {
  WiFiManager wm;
  bool res;
  res = wm.autoConnect("Composting IOT Project [Setup WiFi]"); // password protected ap

  if (!res) {
    Serial.println("Failed to Connect!!");
    // ESP.restart();
  }
  else {
    //if you get here you have connected to the WiFi
    Serial.println("Connected...");
  }
}