// https://github.com/JChristensen/JC_Button
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

//#include <SoftwareSerial.h>

// define sensor PWM Pin
#define Trig 2
#define Echo 4

//-------------------AM Button ---------------------------------------

// Define the pin numbers
const int transistor_Pin = 27;      // Pin connected to the LED
const int buttonPin = 25;   // Pin connected to the button

// Variables to keep track of the button state and transistor signal state
int buttonState = 0;       // Current state of the button
int lastButtonState = 0;   // Previous state of the button
int transistor_state = LOW;   



//-------------------------------------------------------------------

#define TFT_DC 17
#define TFT_CS 5
#define TFT_RST 12
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

long duration;
long total_tank_depth; // this is the overall hight between sensor and bottom of tank
long water_level_depth; // use to store distance between water suface and sensor
long duration_tankcheck; // used under function to check if tank is dipper than 3 meters
int  percentage = 0;
bool state1, pump1;
bool state2, pump2;
int check = 0;
int init_screen = 1;
int fill1 = 0;
int fill2 = 0;

byte X = 25;
byte Y = 193;
byte W = 102;
byte H = 15;



void setup() {
  //----------------------------------------------------------
 // pinMode(12, INPUT_PULLUP); // this will connect to a transistor
  //pinMode(27, OUTPUT); // this pin will control the transistor
  //myBtn.begin();
 // T_Btn.begin(); 

  // Initialize the LED pin as an output
  pinMode(transistor_Pin, OUTPUT);
  
  // Initialize the button pin as an input
  pinMode(buttonPin, INPUT);



  //-------------------------------------------------------------------

  tft.begin();
  tft.setRotation(1);
  tft.fillRect(0, 174, 320, 14, 0xFFFF);
  tft.fillRect(0, 188, 320, 52, 0xA815);
  //tft.fillScreen(ILI9341_PURPLE);

  tft.fillRect(0, 0, 320, 25, 0x57EA);
  tft.setTextColor(0x0);
  tft.setTextSize(2);
  tft.setCursor(155, 5);
  tft.print("TANK");

  tft.fillRect(0, 25, 320, 25, 0xFFEA);
  tft.setCursor(2, 29);
  tft.print("Water Level:  ");

  tft.fillRect(0, 50, 320, 25, 0xA815);
  tft.setCursor(2, 54);
  tft.print("Pump Mode:  ");

  tft.fillRect(0, 75, 320, 25, 0xFAAA);
  tft.setCursor(2, 80);
  tft.print("Pump State:  ");

  tft.fillRect(1, 100, 320, 25, 0x57EA);
  tft.setCursor(155, 104);
  tft.print("PANEL");

  tft.fillRect(0, 125, 320, 25, 0xAAA0);
  tft.setCursor(2, 130);
  tft.print("Pump Mode:  ");

  tft.fillRect(0, 150, 320, 25, 0xA800);
  tft.setCursor(2, 154);
  tft.print("Pump State:  ");

  tft.drawRect(20, 189, 115, 23, 0xFFFF);

  tft.setTextSize(2);
  tft.setCursor(234, 193);
  tft.print("Depth:");

 // Tank Pump Pinout:-------------------------------------------------------------------
  pinMode(Trig, OUTPUT); // ultrasonic trigger pin
  pinMode(Echo, INPUT);  // ultrasonic echo pin
  pinMode(26, INPUT_PULLUP); //Tank pump on/off pin
  pinMode(12, INPUT_PULLUP);  // Tank pump auto manual pin
  pinMode(22, OUTPUT); // Tank pump switching signal
  //--------------------------------------------------------------------------------------

  //pinMode(LED_PIN, OUTPUT);   // set the LED pin as an output
  //---------------------------------------------------------
 
}


void loop() {
 button();
 //T_AutoManual();
  Tank_Pump_Control();
 
  barProgress();

}

void Tank_Pump_Control() {

 
  Sensor_PWM();

  // Print distance from sensor to water surface.
  tft.setTextColor(0xFFEA);
  tft.setCursor(240, 215);
  tft.setTextColor(0xFFEA, 0xA815);
  tft.print(water_level_depth);
  tft.println("cm   ");

  //Print distance as percentage.
  if (percentage < 0)percentage = 0;
  tft.setTextColor(0xA800, 0xFFEA);
  tft.setCursor(155, 29);
  tft.print(percentage);
  tft.println("%   ");


  //check percentage of distance and turn pump on or off
  if ((percentage < 30) & (digitalRead(12)))pump1 = 1;
  if (percentage > 90)pump1 = 0;
  digitalWrite(22, pump1); // by adding !pump, the value is inverted in case a relay with low trigger is used

  // Check if pump is on or off and print text accordingly.
  tft.setCursor(155, 79);
  tft.setTextColor(0x57FF, 0xFAAA);
  if (pump1 == 1)tft.println("ON ");
  else if (pump1 == 0) tft.println("OFF ");

  // Check condition to determine if button is flipped on Auto or Manual position
  tft.setCursor(155, 55);
  tft.setTextColor(0x57FF, 0xA815);
  if (!digitalRead(12))tft.print("Mamual ");
  else tft.print("Auto  ");

  if (!digitalRead(26) & !digitalRead(12)) {
    pump1 = !pump1;

  }

}


void barProgress()
{
  tft.fillRect(22, 193, 110, H, 0xA815); // erase old data
  tft.fillRect(X, Y, percentage + 5, H, 0xFFEA); // fill in % level every 25% increase
  tft.drawLine(58, 190, 58, 209, 0xA800);// draw line seperating each 25% increase
  tft.drawLine(82, 190, 82, 209, 0xA800);
  tft.drawLine(106, 190, 106, 209, 0xA800);
  tft.drawLine(130, 190, 130, 209, 0xA800);


  // Print progress text
  tft.setCursor(25, 215);
  tft.setTextColor(0xFFFF, 0xA815);
  tft.print("Progress =  ");

  //Print percentage value
  tft.setCursor(158, 215);
  tft.setTextColor(0xFFEA, 0xA815);
  tft.print(percentage);
  tft.println("%  ");
}

void Sensor_PWM() {

  digitalWrite(Trig, LOW);
  delayMicroseconds(2);
  digitalWrite(Trig, HIGH);
  delayMicroseconds(20);
  digitalWrite(Trig, LOW);
  duration = pulseIn(Echo, HIGH);
  water_level_depth = (duration / 2) * 0.343; // distance from water surface to sensor.
  water_level_depth = water_level_depth / 10;
  percentage = map(water_level_depth, 5, 400, 100, 0); // express distance in percentage max length
  //percentage = map(water_level_depth, 5, 30, 100, 0);  // express distance in percentage  test

}


//Tank Auto manual soft touch button function
void button()
{
  
 // Read the current state of the button
  buttonState = digitalRead(buttonPin);

  // Check if the button state has changed (from LOW to HIGH)
  if (buttonState != lastButtonState) {
    // If the button is pressed (HIGH), toggle the LED state
    if (buttonState == HIGH) {
      transistor_state = !transistor_state;  // Toggle the LED state
      digitalWrite(transistor_Pin, transistor_state);  // Update the LED state
    }
    
    // Delay to avoid bouncing (debouncing)
    delay(50);
  }

  // Save the current button state for the next loop iteration
  lastButtonState = buttonState;

}