from display.neopixel_64x64 import NeoPixel_64x64
from utils import get_datetime_string, text_width, find_first_mismatch
from utils import colors


class DigitalClock:
    stored_time_str: str = "99:99:99"
    text_color: tuple[int[3]] = colors.NEON_YELLOW
    clear_color: tuple[int[3]] = colors.BLACK

    def __init__(self, display: NeoPixel_64x64, xpos: int, ypos: int):
        self.display = display
        self.xpos = xpos
        self.ypos = ypos

    def _toggle_clear_color(self) -> tuple[int]:
        self.clear_color = (
            colors.BLACK if self.clear_color != colors.BLACK else colors.MAGENTA
        )
        return self.clear_color

    def _text_width(self, text: str) -> int:
        return text_width(text, self.display.selected_font)

    async def tick(self):
        time_str: str = get_datetime_string("time")[:8]

        # ab welcher Position malen wir den String neu
        mismatch_pos: int = find_first_mismatch(self.stored_time_str, time_str)

        untouched_part: str = time_str[:mismatch_pos]
        fresh_part: str = time_str[mismatch_pos:]
        part_to_clear: str = self.stored_time_str[mismatch_pos:]

        textwidth: int = self._text_width(self.stored_time_str)
        print(f"{self.stored_time_str}: #{textwidth}")

        textwidth_untouched_part: int = self._text_width(untouched_part)
        clear_x_start_pos: int = self.xpos + textwidth_untouched_part + 1

        textwidth_part_to_clear: int = self._text_width(part_to_clear)
        clear_x_end_pos: int = clear_x_start_pos + textwidth_part_to_clear - 1

        self.display.clear_box(
            self.ypos,
            clear_x_start_pos,
            self.ypos + self.display.font_height,
            clear_x_end_pos,
            color=self.clear_color,
        )

        self.display.write_text(
            fresh_part, clear_x_start_pos, self.ypos, color=self.text_color
        )

        self.stored_time_str = time_str