from machine import Pin, I2C, RTC
import ssd1306
from characters import CHARACTER_DATA

# ESP32 Pin assignment 
i2c = I2C(0, scl=Pin(22), sda=Pin(21))

oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)

def draw_character(data, x, y):
    for j in range(16):  # Rows
        for byte_index in range(2):  # Each row has 2 bytes of data
            byte_val = data[j * 2 + byte_index]  # Accessing the right byte
            for i in range(8):  # Bits in a byte
                if byte_val & (1 << (7 - i)):
                    oled.pixel(x + byte_index * 8 + i, y + j, 1)
                    print('1', end='')
                else:
                    print(' ', end='')
        print()       

def display_text_string(oled, text, start_x=0, start_y=0, spacing=2):
    """Displays a string of characters on the OLED."""
    x_offset = start_x
    for char in text:
        if char in CHARACTER_DATA:
            char = CHARACTER_DATA[char]
            draw_character(char, x_offset, start_y)
            x_offset += 16 + spacing  # Move the x-offset for the next character

# Clear display
oled.fill(0)

# Display a string of characters as an example
display_text_string(oled, "姓名 孫柏翰 ", start_x=3, start_y=20)
display_text_string(oled, "科系 自資一", start_x=3, start_y=40)
oled.text('411254050', 0, 0, 1) 
oled.show()