#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>     
#include <ESP8266WiFi.h>         
#include <ESP8266HTTPClient.h>   
#include <WiFiClientSecure.h>    
#include <SparkFunCCS811.h>      
#include <AM2302-Sensor.h>       

//WLAN-Daten
#define WIFI_SSID "mdg-sensor"
#define WIFI_PASS "" //Ausgefüllt durch Lehrkraft

const char* sender = ""; //Sensorname - bitte eingeben, muss eindeutig sein (zwei Sensoren dürfen nicht den selben Namen haben)
const char* serverName = "https://sensor.hub.mdg-hamburg.de/send";

#define SEALEVELPRESSURE_HPA (1013.25)
#define BMP_SCK 0
#define BMP_MISO 12
#define BMP_MOSI 2
#define BMP_CS 14

#define CCS811_ADDR 0x5A

#define TEMT6000 A0

Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK);

CCS811 airSensor(CCS811_ADDR);

float temperature;
float pressure;
float temperature_2;
float humidity;
float light;
float adcv;
uint co2;
uint tvoc;

constexpr unsigned int SENSOR_PIN {13U};

AM2302::AM2302_Sensor am2302{SENSOR_PIN};


unsigned long lastTime = 0;  
unsigned long timerDelay = 60000;  //Ausleserate der Sensoren

void getSensorReadings(){
  //Daten auslesen
  temperature = bmp.readTemperature();        //Temperatur #2
  pressure = bmp.readPressure() / 100.0F;     //Druck
  auto status = am2302.read();
  temperature_2 = am2302.get_Temperature();   //Temperatur #1
  humidity = am2302.get_Humidity();           //Luftfeuchte
  adcv = analogRead(TEMT6000) * (3.3 / 1023); //Licht messen (analogRead)
  light = adcv * 500;                         //Licht in lx (Lux) umwandeln

  if (airSensor.dataAvailable())
    {
    airSensor.readAlgorithmResults();
    co2 = airSensor.getCO2();                 //ECO2 messen
    tvoc = airSensor.getTVOC();               //TVOC messen
    }
  airSensor.setEnvironmentalData(humidity, temperature);
}


void setup() {
  pinMode(TEMT6000, INPUT);
  Serial.begin(115200);

  //WLAN-Verbindung aufbauen
  WiFi.begin(WIFI_SSID, WIFI_PASS);

  //Mit WLAN verbinden
  Serial.print("Connecting to ");
  Serial.print(WIFI_SSID);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(100);
    Serial.print(".");
  }
  
  //Wenn mit WLAN verbunden
  Serial.println();
  Serial.println("Connected!");
  Serial.print("IP address for network ");
  Serial.print(WIFI_SSID);
  Serial.print(" : ");
  Serial.println(WiFi.localIP());

  bool status;

  status = bmp.begin();  
  if (!status) {
    Serial.println("Could not detect a BMP280 sensor, Fix wiring Connections!");
    while (1);
  }
   
   if (am2302.begin()) {
      //Benötigt um richtige Daten zu erhalten
      delay(3000);
   }
   else {
      while (true) {
      Serial.println("ERROR: am2302 sensor check. => Please check sensor connection!");
      delay(10000);
      }
   }

  Wire.begin();
    if (airSensor.begin() == false)
    {
      Serial.print("ERROR: CCS811 error. Please check wiring. Freezing...");
      while (1)
        ;
    }
}

void loop() {
  if ((millis() - lastTime) > timerDelay) {
    //Wenn der sensor seit mehr als einer Minute keine Messung gemacht hat
    getSensorReadings();
    Serial.printf("Temperature = %.2f ºC \n", temperature);
    Serial.printf("Temperature2 = %.2f ºC \n", temperature_2);
    Serial.printf("Pressure = %.2f hPa \n", pressure);
    Serial.printf("Humidity = %.2f \n", humidity);
    if(TEMT6000ERR == true) {
      Serial.print("NAN / Error reading TEMT6000 value");
    }else{
      Serial.printf("Light = %.2f \n", light);
    }
    Serial.printf("CO2 = %d \n", co2);
    Serial.printf("TVOC = %d \n", tvoc);
    Serial.println();

  if(WiFi.status()== WL_CONNECTED){
      //Wenn eine WLAN-Verbindung besteht
      WiFiClientSecure client;
      client.setInsecure();
      HTTPClient http;

      http.begin(client, serverName);

      //Daten senden
      http.addHeader("Content-Type", "application/json");
      String httpRequestData = "{\"sender\":\"" + String(sender) + "\",\"data\":[" + String(temperature) + "," + String(temperature_2) + "," + String(pressure) + "," + String(humidity) + "," + String(light) + "," + String(co2) + "," + String(tvoc) + "]}";           
      Serial.println(httpRequestData);
      int httpResponseCode = http.POST(httpRequestData);
      
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
     
      http.end();
    }
    else {
      //Wenn kein WLAN verbunden ist
      Serial.println("WiFi Disconnected");
      WiFi.begin(WIFI_SSID, WIFI_PASS);
    }

    lastTime = millis();

  }
}