#include "U8glib.h"

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0 | U8G_I2C_OPT_NO_ACK | U8G_I2C_OPT_FAST); // Fast I2C / TWI

int nombredePiece = 0;
int currentIndex = 0; 

// 'cadre auto', 16x16px
const unsigned char cadre_auto [] PROGMEM = {
    0xff, 0xff, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01,
    0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x01, 0xff, 0xff
};

const char* consign[] = {
    "1",
    "10",
    "OK"
};

int currentIndex = 0; 
#define pin_up 4
#define pin_down 7
#define pin_enter 12

void setup() {
    u8g.setFont(u8g_font_7x14B); // Set font
    u8g.setColorIndex(1); // Set color to white
    pinMode(pin_up, INPUT_PULLUP);
    pinMode(pin_down, INPUT_PULLUP);
    pinMode(pin_enter, INPUT_PULLUP);
}

void loop() {
    // Handle button presses
    if (digitalRead(pin_up) == LOW) {
        currentIndex++;
        if (currentIndex >= 3) currentIndex = 0; // Wrap around to the first item
        delay(200); // Debounce delay
    }
    if (digitalRead(pin_down) == LOW) {
        if (currentIndex <= 0) currentIndex = 2; // Wrap around to the last item
        else currentIndex--;
        delay(200); // Debounce delay
    }
    if (digitalRead(pin_enter) == LOW) {
        // Increment nombredePiece based on current index
        if (currentIndex == 0) {
            nombredePiece += 1;
        } else if (currentIndex == 1) {
            nombredePiece += 10;
        }
        delay(200); // Debounce delay
    }

    char buffer[10];
    itoa(nombredePiece, buffer, 10); // Convert integer to string

    u8g.firstPage();
    do {
        u8g.setFont(u8g_font_7x14B); // Set the original font
        u8g.drawStr(6, 22, "Nombre de pieces");
        u8g.drawBitmapP(104, 35, 16 / 8, 16, cadre_auto); // Draw frame

        u8g.setFont(u8g_font_6x10); // Set smaller font
        // Calculate the width and height of the text
        uint8_t text_width = u8g.getStrWidth(consign[currentIndex]);
        uint8_t text_height = u8g.getFontAscent() - u8g.getFontDescent();
        // Center the text inside the 16x16 box
        uint8_t x_pos = 104 + (16 - text_width) / 2;
        uint8_t y_pos = 35 + (16 + text_height) / 2;
        u8g.drawStr(x_pos, y_pos, consign[currentIndex]); // Draw text from consign array

        u8g.setFont(u8g_font_7x14B); // Set the original font back
        u8g.drawStr(33, 47, buffer); // Draw the nombredePiece value
    } while ( u8g.nextPage() );

    delay(50); // Delay for smooth progress visualization
}