#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define WHITE   0xFFFF

#define TFT_CS 10
#define TFT_DC 9
#define TFT_RST 8

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
float xMin = 0, xMax = 10;  // Minimum and maximum x-axis values
float yMin = 0, yMax = 100; // Minimum and maximum y-axis values
const int totalsample=11;
float pointX[totalsample] = {-61,2,3,44,50,60,74,88,90,105,181};           // X-coordinate of the point
float pointY[totalsample] = {10,10,20,23,23,23,23,23,23,23,200};          // Y-coordinate of the point

int graphWidth = 320;       // Width of the display
int graphHeight = 240;      // Height of the display

// Calculate scaling factors
float xScale = graphWidth / (xMax - xMin);
float yScale = graphHeight / (yMax - yMin);
void setup() {
   Serial.begin(9600);
    tft.begin();
      tft.setRotation(0); // Adjust rotation if needed
        tft.fillScreen(ILI9341_BLACK);

    //int xAxisY = map(0, yMin, yMax, graphHeight, 0);
    //Serial.println(xAxisY);
     tft.fillRect(20,20,220,3,WHITE); //y axis 
     tft.fillRect(20,20,3,300,WHITE);//x axis 
    //tft.drawFastHLine(10, 10, 3,WHITE);
    // Draw the point
    draw(pointX,pointY);
       // tft.fillCircle(pointYPixel, pointXPixel+19, 3, ILI9341_RED);
   Serial.println(getMax(pointX));
}
void loop() {
    // Your code here, if needed
}
void textX(int x,int x_pos){
  tft.setRotation(0);
  tft.setCursor(305,x_pos-5);
  tft.print(x);
  tft.setRotation(0);
}
void textY(int y,int y_pos){
    tft.setRotation(3);
    tft.setCursor(0,-3+map(y_pos,20,220,220,20));
  tft.print(y);
    tft.setRotation(0);
    //tft.setCursor(0,map(y,20,220,220,20));
    //serial.println()
}
void draw(float *x, float *y){
  float maxY=getMax(y); 
  float labelTextX[totalsample];
  for (int i =0;i<totalsample;i++){
     labelTextX[i]=x[i];
  }
  adjustXScale(x);

   float pointXPixel = 20;
    if(x[0]!=0) pointXPixel=x[0]+25;
    float pointYPixel = 20;
    if(y[0]!=0) pointYPixel=y[0]+25;
    tft.fillRect(20,pointXPixel-1,pointYPixel-20,3,ILI9341_RED); //y axis 
    tft.fillCircle(pointYPixel, pointXPixel, 3, ILI9341_RED);

    drawLevel(labelTextX[0],y[0],x[0]+20,pointYPixel);
  
  for (int i=1;i<totalsample;i++){
    if(x[i]!=0&&x[i]!=x[i-1]) pointXPixel = x[i]+i*8+25; // Mirror x-coordinate
    if(y[i]!=0&&y[i]!=y[i-1]) pointYPixel = y[i]+i*8+20;
    tft.fillRect(20,pointXPixel-1,pointYPixel-20,3,ILI9341_RED); //y axis 
    tft.fillCircle(pointYPixel, pointXPixel, 3, ILI9341_RED);
    drawLevel(labelTextX[i],y[i],20+8*i+x[i],pointYPixel);
  }
}
void drawLevel(int x,int y,int x_pos,int y_pos){
  // Draw labels
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(1);
  textX(x,x_pos);
  textY(y,y_pos);

}
float getMax(float maxN[]){
  float maxValue = maxN[0];
  for (int i = 1; i < totalsample; i++) {
        if (maxN[i] > maxValue) {
                maxValue = maxN[i];
                    }
  }
  return maxValue;
}
float getMin(float minN[]){
  float minValue = minN[0];
  for (int i = 1; i < totalsample; i++) {
        if (minN[i] < minValue) {
                minValue = minN[i];
        }   
  }
  return minValue;
}
float adjustXScale(float *x){
    float maxX=getMax(x);
    float minX=getMin(x);
    if(maxX>200&&minX<0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],minX,maxX,0,200);
    }
    else if(maxX>200&&minX>=0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],0,maxX,0,200);
    }
    else if(maxX<200&&minX<0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],minX,200,0,200);
    }

}
float adjustYScale(float *y){
    float maxY=getMax(y);
    float minY=getMin(y);
    if(maxY>200&&minY<0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],minX,maxX,0,200);
    }
    else if(maxY>200&&minY>=0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],0,maxX,0,200);
    }
    else if(maxY<200&&minY<0)
    for (int i=0;i<totalsample;i++){
      x[i]=map(x[i],minX,200,0,200);
    }

}