/*
 * 
 *  HMI Communication Script
 *  
 *  This script helps you to communicate with the HMI display
 *  from 
 */
// Send command to the UART HMI
// Example usage: sendCommand("t3.txt=\"OUTPUT\"");

bool nextReadIsPageNumber = false; //Next byte is page number
byte incomingByte = 0;             //Incoming byte buffer

void sendCommand(String cmd){
  if (debugMode){
    //Mirror output to serial
    Serial.print(cmd);
    Serial.write(0XFF);        
    Serial.write(0XFF);
    Serial.write(0XFF);
  }
  HMISerial.print(cmd); 
  HMISerial.write(0XFF);
  HMISerial.write(0XFF);
  HMISerial.write(0XFF);
  delay(10);
}

//Set background brightness, range 0 - 100 in string
void SetDisplayBrightness(String brightness){
  sendCommand("dim=" + brightness);
}

void renderForcastField(String dayid, String dow, int minTemp, int maxTemp, int humd, int forcastIcon){
  //Update the week of day, id = fcd*
  sendCommand("forcast.fcd" + dayid + ".txt=\"" + dow + "\"");
  //Update the temperature range
  String tempRange = String(minTemp) + " - " + String(maxTemp) + "C | " + String(humd) + "%";
  sendCommand("forcast.fct" + dayid + ".txt=\"" + tempRange + "\"");
  //Update weather icon
  String hmiWeatherIcon = "14";
  if (forcastIcon == 50){
    //Sunny
    hmiWeatherIcon = "14";
  }else if (forcastIcon == 51 || forcastIcon == 52){
    //Cloudy with Sun
    hmiWeatherIcon = "18";
  }else if (forcastIcon == 53 || forcastIcon == 54){
    //Sun with rain
    hmiWeatherIcon = "19";
  }else if (forcastIcon == 60 || forcastIcon == 61){
    //Cloudy
    hmiWeatherIcon = "17";
  }else if (forcastIcon == 62 || forcastIcon == 63 || forcastIcon == 64){
    //Rain
    hmiWeatherIcon = "20";
  }else if (forcastIcon == 65){
    //Thunder
    hmiWeatherIcon = "25";
  }else if (forcastIcon >= 70 && forcastIcon <= 75){
    //Clear Night
    hmiWeatherIcon = "15";
  }else if (forcastIcon == 76){
    //Cloudy Night
    hmiWeatherIcon = "17";
  }else if (forcastIcon == 80){
    //Windy 
    hmiWeatherIcon = "26";
  }else if (forcastIcon == 81){
    //Dry
    hmiWeatherIcon = "21";
  }else if (forcastIcon == 82){
    //Wet
    hmiWeatherIcon = "22";
  }else if (forcastIcon >= 83 && forcastIcon <= 85){
    //Fog
    hmiWeatherIcon = "16";
  }else if (forcastIcon == 90 || forcastIcon == 91){
    //Hot
    hmiWeatherIcon = "24";
  }else if (forcastIcon == 92 || forcastIcon == 93){
    //Cold
    hmiWeatherIcon = "23";
  }
  sendCommand("forcast.fcp" + dayid + ".pic=" + hmiWeatherIcon);
}

//Send Float to the display, support -99 to +99 range, automatic turncat into 4 digit with unit
//Example usage: printIntCommand("t6.txt=", 16);
void printIntCommand(String cmd, int value){
  if (debugMode){
    //Mirror output to serial
    Serial.print(cmd + "\"");
    Serial.print(String(value));
    Serial.print("\"");
    Serial.write(0XFF);        
    Serial.write(0XFF);
    Serial.write(0XFF);
  }
  HMISerial.print(cmd + "\"");
  HMISerial.print(String(value));
  HMISerial.print("\"");
  HMISerial.write(0XFF);        
  HMISerial.write(0XFF);
  HMISerial.write(0XFF);
  delay(10);
}

//Send Float to the display, support -99 to +99 range, automatic turncat into 4 digit with unit
//Example usage: printFloatCommand("t6.txt=", 16.8, "V");
void printFloatCommand(String cmd, float value, String unit){
  if (debugMode){
    //Mirror output to serial
    Serial.print(cmd + "\"");
    if (value <= -10){
      Serial.print(value, 1);
    }else if (value < 0){
      Serial.print(value, 2);
    }else if (value < 10){
       Serial.print(value, 2);
    }else{
      Serial.print(value, 1);
    }
    Serial.print(unit + "\"");
    Serial.write(0XFF);        
    Serial.write(0XFF);
    Serial.write(0XFF);
  }
  HMISerial.print(cmd + "\"");
  if (value <= -10){
    HMISerial.print(value, 1);
  }else if (value < 0){
    HMISerial.print(value, 2);
  }else if (value < 10){
    HMISerial.print(value, 2);
  }else{
    HMISerial.print(value, 1);
  }
  HMISerial.print(unit + "\"");
  HMISerial.write(0XFF);
  HMISerial.write(0XFF);
  HMISerial.write(0XFF);
  delay(10);
}

void changePage(String pageid){
  sendCommand("page " + pageid);
}

//Get the current page number on HMI
int getPageNumber(){
  //Request the UART HMI to return its current page number
  sendCommand("sendme");

  //Try to parse and catch the return value
  bool nextReadIsPageNumber = false;
  if (debugMode){
    //Debug mode
    while (Serial.available() > 0) {
      // read the incoming byte:
      incomingByte = Serial.read();
      if (nextReadIsPageNumber){
        //This read is the page number
        nextReadIsPageNumber = false;
        return incomingByte;
      }

      if (incomingByte == 0x66){
        //This is the start of a page response
        nextReadIsPageNumber = true;
      }
    }
  }else{
    while (HMISerial.available() > 0) {
      // read the incoming byte:
      incomingByte = HMISerial.read();
      if (nextReadIsPageNumber){
        //This read is the page number
        nextReadIsPageNumber = false;
        return incomingByte;
      }

      if (incomingByte == 0x66){
        //This is the start of a page response
        nextReadIsPageNumber = true;
      }
    }
  }

  return -1;
}