/*
  Dual "Hello World" for ILI9341 LCD

  https://wokwi.com/arduino/projects/308024602434470466
*/

#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC_1 9
#define TFT_CS_1 10
#define TFT_DC_2 6
#define TFT_CS_2 7

Adafruit_ILI9341 tft1 = Adafruit_ILI9341(TFT_CS_1, TFT_DC_1);
Adafruit_ILI9341 tft2 = Adafruit_ILI9341(TFT_CS_2, TFT_DC_2);

int progress1 = 0;
int progress2 = 0;

void setup() {
  tft1.begin();
  tft1.setRotation(3); // Set rotation for TFT1
  tft1.setCursor(26, 120);
  tft1.setTextColor(ILI9341_RED);
  tft1.setTextSize(3);
  tft1.println("Hello, TFT1!");

  tft1.setCursor(20, 160);
  tft1.setTextColor(ILI9341_GREEN);
  tft1.setTextSize(2);
  tft1.println("I can has colors?");

  tft2.begin();
  tft2.setRotation(3); // Set rotation for TFT2
  tft2.setCursor(26, 120);
  tft2.setTextColor(ILI9341_RED);
  tft2.setTextSize(3);
  tft2.println("Hello, TFT2!");

  tft2.setCursor(20, 160);
  tft2.setTextColor(ILI9341_GREEN);
  tft2.setTextSize(2);
  tft2.println("I can has colors?");

  Serial.begin(115200);
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);

  // Meme reference: https://english.stackexchange.com/questions/20356/origin-of-i-can-haz
}

void loop() {
  progress1 = analogRead(A0);
  progress2 = analogRead(A1);
  drawDial(tft1, 128, 128, 100, 0, 1023, progress1, 0, 100);
  drawProgressBar(tft2, 192, 72, 100, 20, 0, 1023, progress2, 0, 100);
  Serial.print("Progress1: ");
  Serial.print(progress1);
  Serial.print(" | Progress2: ");
  Serial.println(progress2);
  delay(100);
}

int lastLineX;
int lastLineY;

void drawDial(Adafruit_ILI9341 &tft, int x, int y, int radius, float inputMin, float inputMax, float inputValue, float guageMin, float guageMax) {
  // 270 sets travel angle of gauge needle.
  float DIAL_TRAVEL_DEGS = 270.00;
  // -225 sets start position of gauge needle.
  float DIAL_START_POSITION = -225.00;

  int progress = getGaugeValue(inputMin, inputMax, inputValue, guageMin, guageMax);
  progress = DIAL_TRAVEL_DEGS / guageMax * progress;

  float angle = float(progress) + DIAL_START_POSITION;
  float radAngle = radians(angle);

  int endX = x + (cos(radAngle) * (radius - 3));
  int endY = y + (sin(radAngle) * (radius - 3));

  // Draw the dial background
  //tft.fillCircle(x, y, radius, ILI9341_BLACK);
  //tft.fillCircle(x, y, radius - 4, ILI9341_WHITE);
  tft.drawCircle(x, y, radius+2, ILI9341_WHITE);

  // Draw the dial needle
  tft.drawLine(x, y, lastLineX, lastLineY, ILI9341_BLACK);

  tft.drawLine(x, y, endX, endY, ILI9341_RED);
  lastLineX = endX;
  lastLineY = endY;

  tft.fillCircle(x, y, 4, ILI9341_RED);
}

int getGaugeValue(float inputMin, float inputMax, float inputValue, float guageMin, float guageMax) {
  return int((inputValue - inputMin) * (guageMax - guageMin) / (inputMax - inputMin) + guageMin);
}

void drawProgressBar(Adafruit_ILI9341 &tft, int x, int y, int width, int height, float inputMin, float inputMax, float inputValue, float guageMin, float guageMax) {
  int progress = getGaugeValue(inputMin, inputMax, inputValue, guageMin, guageMax);
  int barWidth = map(progress, 0, guageMax, 0, width);

  // Draw progress bar background ILI9341_RED
  tft.drawRect(x, y, width, height, ILI9341_RED);
  tft.fillRect(x, y, width, height, ILI9341_BLACK);
  tft.fillRect(x, y, barWidth, height, ILI9341_WHITE);
  
  // Draw progress percentage text
  tft.setTextSize(2);
  tft.setTextColor(ILI9341_RED);
  tft.setCursor(x + width/2 - 20, y + height/2 - 10);
  tft.print(progress);
  tft.print("%");
}