#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int buttonUp = 2;
const int buttonDown = 3;
const int buttonSelect = 4;
const int buttonBack = 5;
const int buzzerPin = 9; // Replace '6' with the actual pin number where the buzzer is connected

int menuIndex = 0;
String menuItems[] = {"Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6", "Item 7", "Item 8", "Item 9", "Item 10"};
bool inMenu = true;
bool isBeeping = false;

void setup() {
    pinMode(buttonUp, INPUT_PULLUP);
    pinMode(buttonDown, INPUT_PULLUP);
    pinMode(buttonSelect, INPUT_PULLUP);
    pinMode(buttonBack, INPUT_PULLUP);
    pinMode(buzzerPin, OUTPUT); // Set the buzzer pin as an output

    display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
    display.clearDisplay();
    display.display();
    updateMenu();
}

void loop() {
    if (inMenu) {
        if (digitalRead(buttonUp) == LOW) {
            menuIndex--;
            if (menuIndex < 0) {
                menuIndex = sizeof(menuItems)/sizeof(menuItems[0]) - 1;
            }
            updateMenu();
            beep(1000, 100); // Beep at 1000 Hz for 100 milliseconds (adjust duration as needed)
            delay(200);
        }
        if (digitalRead(buttonDown) == LOW) {
            menuIndex++;
            if (menuIndex >= sizeof(menuItems)/sizeof(menuItems[0])) {
                menuIndex = 0;
            }
            updateMenu();
            beep(1000, 100); // Beep at 1000 Hz for 100 milliseconds (adjust duration as needed)
            delay(200);
        }
        if (digitalRead(buttonSelect) == LOW) {
            inMenu = false;
            executeMenuItem(menuIndex);
            beep(466, 100); // Beep at 500 Hz for 100 milliseconds (adjust duration as needed)
            delay(200);
        }
    } else {
        if (digitalRead(buttonBack) == LOW) {
            inMenu = true;
            updateMenu();
            beep(466, 100); // Beep at 500 Hz for 100 milliseconds (adjust duration as needed)
            delay(200);
        }
    }
}

void beep(int frequency, int duration) {
    if (!isBeeping) { // Only start a new beep if there is no ongoing beep
        isBeeping = true;
        unsigned long startTime = millis();
        int halfPeriod = 1000000 / (frequency * 2);

        while (millis() - startTime < duration) {
            digitalWrite(buzzerPin, HIGH);
            delayMicroseconds(halfPeriod);
            digitalWrite(buzzerPin, LOW);
            delayMicroseconds(halfPeriod);
        }

        digitalWrite(buzzerPin, LOW); // Make sure the buzzer is off after the beep
        isBeeping = false;
    }
}

void updateMenu() {
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0, 0);

    int numItemsToShow = min(8, sizeof(menuItems) / sizeof(menuItems[0]));

    // Calculate the starting index for displaying the menu items
    int startIndex = 0;
    if (menuIndex >= numItemsToShow - 1) {
        startIndex = menuIndex - (numItemsToShow - 1);
    }

    for (int i = startIndex; i < startIndex + numItemsToShow; i++) {
        if (i == menuIndex) {
            display.print("> ");
        } else {
            display.print("   ");
        }
        display.println(menuItems[i]);
    }
    display.display();
}

void executeMenuItem(int itemIndex) {
    // Check the selected menu item and call the corresponding function
    switch (itemIndex) {
        case 0:
            item1Function();
            break;
        case 1:
            item2Function();
            break;
        case 2:
            item3Function();
            break;
        case 3:
            item4Function();
            break;
        case 4:
            item5Function();
            break;
        case 5:
            item6Function();
            break;
        case 6:
            item7Function();
            break;
        case 7:
            item8Function();
            break;
        case 8:
            item9Function();
            break;
        case 9:
            item10Function();
            break;
    }
}



void item1Function() {
    	// Add code for Item1 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item1");
	display.display();
}

void item2Function() {
    	// Add code for Item2 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item2");
	display.display();
}

void item3Function() {
    	// Add code for Item3 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item3");
	display.display();
}

void item4Function() {
    	// Add code for Item4 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item4");
	display.display();
}

void item5Function() {
    	// Add code for Item5 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item5");
	display.display();
}

void item6Function() {
    	// Add code for Item6 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item6");
	display.display();
}

void item7Function() {
    	// Add code for Item7 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item7");
	display.display();
}

void item8Function() {
    	// Add code for Item8 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item8");
	display.display();
}

void item9Function() {
    	// Add code for Item9 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item9");
	display.display();
}

void item10Function() {
    	// Add code for Item10 here
    	display.clearDisplay();
	display.setTextSize(1);
	display.setTextColor(WHITE);
	display.setCursor(0,0);
	display.println("Selected: Item10");
	display.display();
}
void buzzer(){
    
}