# Standalone MicroPython Voice Animation: Battery Low
# Exposes run(text="", frames=...) and runs automatically if executed directly.
import time

try:
    import board_config
    display = getattr(board_config, 'display_instance', None)
except Exception:
    board_config = None
    display = None

def draw_center_text(d, msg, y, w, scale=1, c=1):
    char_w = 8 * scale
    x = max(0, (w - len(msg) * char_w) // 2)
    if hasattr(d, 'text_large') and scale > 1:
        try:
            d.text_large(msg, x, y, scale, c)
            return
        except Exception:
            pass
    d.text(msg, x, y, c)

def run(text="", frames=100):
    if not display:
        print("board_config.display_instance is not available. Skipping animation.")
        return

    width = getattr(display, 'width', 400)
    height = getattr(display, 'height', 300)
    cx, cy = width // 2, height // 2

    label = text if text else "LOW BATTERY!"
    frame = 0

    try:
        while True:
            if frames is not None and frames > 0 and frame >= frames:
                break

            display.clear(0)

            # Center coordinates adjusted for warning triangle on the left side
            # Battery offset to the right
            bat_x = cx + 20
            bat_y = cy - 10

            # Draw battery container outline
            display.rect(bat_x - 65, bat_y - 30, 115, 60, 1)
            display.rect(bat_x - 64, bat_y - 29, 113, 58, 1) # thicker
            # Battery cap tip
            display.fill_rect(bat_x + 50, bat_y - 12, 10, 24, 1)

            # Low charge blinking segment on the left
            blink_on = (frame // 4) % 2 == 0
            if blink_on:
                # Draw small low charge bar
                display.fill_rect(bat_x - 58, bat_y - 23, 25, 46, 1)

            # Draw a warning triangle on the left
            warn_x = cx - 110
            warn_y = cy - 10
            
            # Warning triangle outline
            display.line(warn_x, warn_y - 25, warn_x - 25, warn_y + 20, 1)
            display.line(warn_x, warn_y - 25, warn_x + 25, warn_y + 20, 1)
            display.line(warn_x - 25, warn_y + 20, warn_x + 25, warn_y + 20, 1)

            # Warning exclamation mark
            display.fill_rect(warn_x - 2, warn_y - 8, 4, 16, 1)
            display.fill_rect(warn_x - 2, warn_y + 11, 4, 4, 1)

            # Draw diagonal warning grid lines in battery background if empty to look stylish
            if not blink_on:
                for diag in range(-20, 40, 10):
                    display.line(bat_x - 58, bat_y - 23 + diag, bat_x - 38, bat_y + 23 + diag, 1)

            # Draw centered text label at the bottom
            draw_center_text(display, label, height - 30, width, scale=1, c=1)

            display.show()
            frame += 1

            try:
                time.sleep_ms(60)
            except AttributeError:
                time.sleep(0.06)
    except KeyboardInterrupt:
        print("Animation interrupted by user.")

if __name__ in ('__main__', '__name__'):
    run()