#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>
#include <Button.h>
#include <math.h>

#define TFT_DC 2
#define TFT_CS 15
#define BUTTON_SIGNAL1 0   // Broche GPIO pour le bouton du signal 1
#define BUTTON_SIGNAL2 5   // Broche GPIO pour le bouton du signal 2
#define BUTTON_SIGNAL3 14  // Broche GPIO pour le bouton du signal 3
#define BUTTON_SIGNAL4 12  // Broche GPIO pour le bouton du signal 4
#define TFT_WIDTH 320
#define TFT_HEIGHT 240
#define SIGNAL_CLEAR_DELAY 50 // Délai (en ms) entre chaque colonne effacée lors du nettoyage du signal précédent

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
Button buttonSignal1(BUTTON_SIGNAL1);
Button buttonSignal2(BUTTON_SIGNAL2);
Button buttonSignal3(BUTTON_SIGNAL3);
Button buttonSignal4(BUTTON_SIGNAL4);
volatile bool signalRequested = false;
volatile int requestedSignalNumber = 0;
volatile bool signalInProgress = false;

void setup() {
  Serial.begin(9600);
  tft.begin();
  tft.setRotation(1);
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(3);

  buttonSignal1.begin();
  buttonSignal2.begin();
  buttonSignal3.begin();
  buttonSignal4.begin();

  attachInterrupt(digitalPinToInterrupt(BUTTON_SIGNAL1), signalInterrupt, FALLING);
  attachInterrupt(digitalPinToInterrupt(BUTTON_SIGNAL2), signalInterrupt, FALLING);
  attachInterrupt(digitalPinToInterrupt(BUTTON_SIGNAL3), signalInterrupt, FALLING);
  attachInterrupt(digitalPinToInterrupt(BUTTON_SIGNAL4), signalInterrupt, FALLING);
}
void loop() {
  if (signalRequested && !signalInProgress) {
    signalInProgress = true;
    signalRequested = false;  // Réinitialiser signalRequested ici pour éviter les demandes multiples
   clearSignal(); // Effacer le signal précédent
    switch (requestedSignalNumber) {
      case 1:
        drawSignal(ILI9341_YELLOW, calculateCombinedSignal1);
        clearSignal();
        break;
      case 2:
        drawSignal(ILI9341_GREEN, calculateCombinedSignal2);
        clearSignal();
        break;
      case 3:
        drawSignal(ILI9341_RED, calculateCombinedSignal3);
        clearSignal();
        break;
      case 4:
        drawSignal(ILI9341_CYAN, calculateCombinedSignal4);
        clearSignal();
        break;
      default:
        break;
    }
    signalInProgress = false;
  }
}


void signalInterrupt() {
  int button = digitalRead(BUTTON_SIGNAL1) == LOW ? 1 :
               digitalRead(BUTTON_SIGNAL2) == LOW ? 2 :
               digitalRead(BUTTON_SIGNAL3) == LOW ? 3 :
               digitalRead(BUTTON_SIGNAL4) == LOW ? 4 : 0;

  if (button != 0 && button != requestedSignalNumber) {
    signalRequested = true;
    requestedSignalNumber = button;
    signalInProgress = false;  // Reset signalInProgress to allow new signal to be drawn
  }
}




void clearSignal() {
 // Effacer l'écran progressivement
  for (int x = 0; x < TFT_WIDTH; x++) {
    for (int y = 0; y < TFT_HEIGHT; y++) {
      tft.drawPixel(x, y, ILI9341_BLACK); // Effacer en noir
     delay(SIGNAL_CLEAR_DELAY); // Délai entre chaque colonne effacée
    }
  }
}

void drawSignal(uint16_t color, float (*calculateSignal)(int)) {
  for (int x = 0; x < TFT_WIDTH - 1; x++) {
    float y = calculateSignal(x);
    float y_next = calculateSignal(x + 1);
    tft.drawLine(x, y, x + 1, y_next, color);
  }
}


float calculateCombinedSignal1(int x) {
  float s = 0;
  int offset = 1;

  while (offset <= 1000) {
    float onde_P = -(1 / 0.4) * exp(-pow((x - 20 - offset), 2) / pow(8, 2));
    float onde_Q = (1.4 / 0.4) * exp(-pow((x - 42 - offset), 2) / 1.5);
    float onde_R = -(4 / 0.2) * exp(-pow((x - 47.35 - offset), 2) / pow(2.5, 2));
    float onde_S = (1 / 0.2) * exp(-pow((x - 50.9 - offset), 2) / pow(1.5, 2));
    float onde_T = -(1 / 0.3) * exp(-pow((x - 85 - offset), 2) / 80);
    s += (onde_P + onde_Q + onde_R + onde_S + onde_T);
    offset += 120;
  }

  return s * 4 + 80;
}

float calculateCombinedSignal2(int x) {
  float s2 = 0;
  int offset = 1;

  while (offset <= 1000) {
    float y1 = -(3.5 / 0.25) * exp(-pow((x - 15 - offset), 2) / pow(4, 2));
    float y2 = 7 * exp(-pow((x - 20 - offset), 2) / pow(8, 2));
    float y3 = -2 * exp(-pow((x - 20.2 - offset), 2) / pow(6, 2));
    s2 += y1 + y2 + y3;
    offset += 100;
  }

  return s2 * 0.6 * 7 + 50;
}

float calculateCombinedSignal3(int x) {
  float s3 = 0;
  int offset = 1;

  while (offset <= 1000) {
    float y1 = -(0.4 / 2.5) * exp(-pow((x - 12 - offset), 2) / pow(6, 2));
    float y2 = -(0.5 / 5) * exp(-pow((x - 25.5 - offset), 2) / pow(3, 2));
    float y3 = -(0.4 / 5) * exp(-pow((x - 35 - offset), 2) / pow(2, 2));
    float y4 = (0.7 / 5) * exp(-pow((x - 40 - offset), 2) / pow(2, 2));
    float y5 = -(0.6 / 9) * exp(-pow((x - 50 - offset), 2) / 15);
    float y6 = -(0.7 / 3.0) * exp(-pow((x - 60 - offset), 2) / pow(12, 2));
    s3 += y1 - y2 + y3 + y4 + y5 + y6;
    offset += 90;
  }

  return s3 * 15 + 10;
}

float calculateCombinedSignal4(int x) {
  float sum_y34 = 0;
  for (int n = 1; n <= 400; n += 18) {
    float y3 = -(3.0 / 0.2) * exp(-pow((x - (5 + n)), 2) / pow(2, 2));
    float y4 = 0.8 * exp(-pow((x - (8 + n)), 2) / pow(9, 2));
    sum_y34 += y3 + y4;
  }

  return sum_y34 * 5 + 70;
}