import processing.serial.*;
Serial port;  // Создание объекта класса Serial
int val;      // Данные, получаемые из сом-порта
int[] values;
float zoom;
char flag = 0;
char first_m = 1;
String inputString = "";

String portValue = ""; //значення, яке ми отримуємо з СОМ-порту
String buffer = "";
int Ipoint = 0;
int Upoint = 0;
int Tpoint = 0;
//int Xpoint_1 = 0;
//int Ypoint_1 = 0;

int x0, y0, x1, y1;
int x0_1, y0_1, x1_1, y1_1;
int z = 0;
float R_float;
String R_out;


void setup() 
{
  size(640, 640);


  // Открываем порт, к которому подключена плата

  //контроллера используя скорость (9600 bps)
  port = new Serial(this, Serial.list()[0], 9600);
  values = new int[3];
  zoom = 1.0f;
  smooth();
  
  background(0);
}


//Функція, яка викликається, коли з СОМ-порту приходять нові дані
void serialEvent(Serial port)
{
  //Зчитуємо дані з СОМ-порту і записуємо у відповідну змінну
  portValue = port.readStringUntil('\n'); 


  if (portValue != null) {

    flag = 1; 
    inputString = portValue;
  }
}




void pushValue(int value) {
  for (int i=0; i<width-1; i++)
    values[i] = values[i+1];
  values[width-1] = value;
}


void drawLines2() {
  stroke(255);

  int displayWidth = (int) (width / zoom);


  line(x0, y0, x1, y1);
  line(x0_1, y0_1, x1_1, y1_1);
  //text(x0_1 + " " + y0_1 + " " + x1_1 + " " +Upoint/Ipoint, width-145, 50);  
  x0 = x1;
  y0 = y1;
  
  x0_1 = x1_1;
  y0_1 = y1_1; 


  // text(y1, 30, 30);
}

/*void drawLines3() {
  stroke(255);

  int displayWidth = (int) (width / zoom);


  line(x01, y01, x11, y11);
  x01 = x11;
  y01 = y11;


  // text(y1, 30, 30);
}
*/



void drawGrid() {
  stroke(255, 0, 0);
  line(15, height-350, width-15, height-350);
  line(15, height-350, 15, 15);
  line(width-15, height-350, width-30, height-360); //>x
  line(width-15, height-350, width-30, height-340); //>x
  line(15, 15, 25, 30);//>y
  line(15, 15, 5, 30);//>y
  
  
  
  //second 
  line(15, height-15, width-15, height-15);
  line(15, height-15, 15, height-300);
  line(width-15, height-15, width-30, height-25); //>x
  line(width-15, height-15, width-30, height-5);  //>x
  line(15, height-300, 25, height-285);
  line(15, height-300, 5, height-285);
  
  
}


void keyReleased() {
  switch (key) {
  case '+':
    zoom *= 2.0f;
    println(zoom);
    if ( (int) (width / zoom) <= 1 )
      zoom /= 2.0f;
    break;
  case '-':
    zoom /= 2.0f;
    if (zoom < 1.0f)
      zoom *= 2.0f;
    break;
  }
}

void draw()
{


  //


  if (flag == 1) {

    drawGrid();




    //=====================================
    values = int(split(inputString, ","));

    Upoint=values[0];
    Tpoint=values[1];
    Ipoint=values[2];
    
    fill(0);
    stroke(0);
    rect( width-146, 19, width, 81);
    fill(255);
    textSize(18);
    text("U = " + Upoint + " mV", width-145, 50);
    text("I = " + Ipoint + " mA", width-145, 80);
    text("I", 35, 35);
    text("U", width-35, height- 370);
    //=====================================
    //for float R
    //rect( width-30, height-150, width, 81);
    
    
    /*Xpoint_1=values[2];
    Ypoint_1=values[0];
    */
    fill(0);
    stroke(0);
    rect( width-146, height-330, width, height-550);
    fill(255);
    text("T = " + Tpoint + " °C", width-145, height-300);
    //text(x1_1, width-145, height-300);
    text("R = " + R_out + " Om", width-145, height-270);
       //text(x1_1, width-145, height-240);
    text("T", 35, height-285);
    text("R", width-35, height- 35);
    R_out = String.format("%.2f", R_float);
    


    x1 =  int(Upoint / 1023.0f / 30 * (width-30) + 15);
    if(Ipoint > 0){
    y1 = int(height - 350 - Ipoint * 1000 / 1023.0f / 75 * (height-30));
    }
    else{
      
    }
    
    //z=Xpoint/Ypoint;
    //if(Ipoint!=0){
    R_float = float(Upoint) / float(Ipoint*1000);
    //R_float = 1 / 2;
    
    if(R_float > 0){
    x1_1 = int(R_float *500 / 1023.0f * (width-30) + 15);
    }
    else{
     R_float = 0; 
    }
    //text(x1_1, width-35, height- 105);
    
    //}
    //else{
     //x1_1=0; 
    //}
    y1_1 = int(height - 15 - Tpoint *2 / 1023.0f * (height-30)); //graphik 2
    //y1_1 = int(height-Tpoint*2);
    
    //text(y1_1, width-145, height-240);

    //==================================================================
    if (first_m == 1)
    {
      x0 = x1;
      y0 = y1;
      
      x0_1 = x1_1;
      y0_1 = y1_1;
      first_m = 0;
    } else
      drawLines2();
      flag = 0;
  };

  // val = getValue();
  /*
  if (val != -1) {
   pushValue(val);
   }
   drawLines();
   */
}