/*
  Wokwi | general
  Tasneeem — 9/23/25 2:47 PM
  Project Link: https://wokwi.com/projects/442733727128674305?gh=1

  Error message: Failed to fetch
*/

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int redLedPin = 6;
const int yellowLedPin = 5;
const int greenLedPin = 4;
const int buzzerPin = 3;
const int buttonPin = 2;

int donationCount = 0;
int goal = 30;

String messages[] = {
  "You give hope!",
  "Thank you! <3",
  "Every bit helps",
  "Free Palestine",
  "Solidarity!",
  "Hope is rising"
};
int numMessages = 6;

long lastDebounceTime = 0;
long debounceDelay = 50;
int lastButtonState = HIGH;

void setup() {
  lcd.init();
  lcd.backlight();

  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(redLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  randomSeed(analogRead(0));

  updateDisplay();
}

void loop() {
  int reading = digitalRead(buttonPin);

  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading == LOW) {
      donationCount++;
      tone(buzzerPin, 1000, 100);
      updateDisplay();

      if (donationCount < goal) {
        // من 1 إلى 29 → فلاش واحد (يضوي ثم يطفي)
        if (donationCount <= goal / 3) {
          flashLed(redLedPin);
        } else if (donationCount <= (goal * 2) / 3) {
          flashLed(yellowLedPin);
        } else {
          flashLed(greenLedPin);
        }
      } else if (donationCount == goal) {
        // المرة 30 → احتفال
        celebrateGoal();
      }

      delay(500);
      lcd.setCursor(0, 1);
      lcd.print("                ");
      lcd.setCursor(0, 1);
      lcd.print(messages[random(numMessages)]);
      delay(1500);
      updateDisplay();

      while (digitalRead(buttonPin) == LOW) {}
    }
  }
  lastButtonState = reading;
}

void updateDisplay() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Donations: " + String(donationCount));
  lcd.setCursor(0, 1);
  lcd.print("For Palestine <3");
}

// فلاش واحد
void flashLed(int pin) {
  digitalWrite(pin, HIGH);
  delay(300);
  digitalWrite(pin, LOW);
}

// الاحتفال عند الوصول للهدف
void celebrateGoal() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(redLedPin, HIGH);
    digitalWrite(yellowLedPin, HIGH);
    digitalWrite(greenLedPin, HIGH);
    tone(buzzerPin, 1500, 150);
    delay(200);
    digitalWrite(redLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(greenLedPin, LOW);
    delay(200);
  }
}