"""
Python representation of the "config.txt" file inside the WebDAV directory.
"""

from io import BytesIO
from typing import Any

from pydantic import BaseModel
from tomli import loads as toml_loads
from tomli_w import dump as toml_dump
from webdav3.exceptions import RemoteResourceNotFound

from .dav_file import DavFile


class TickerConfig(BaseModel):
    """
    Sections "[ticker.*]" in "config.txt".
    """

    separator: str = " +++ "
    comment_marker: str = "#"


class ImageConfig(BaseModel):
    """
    Sections "[image.*]" in "config.txt".
    """

    mode: str = "RGB"
    save_params: dict[str, Any] = {
        "format": "JPEG",
        "quality": 85,
    }


class Config(BaseModel):
    """
    Main representation of "config.txt".
    """

    ticker: TickerConfig = TickerConfig()
    image: ImageConfig = ImageConfig()

    @classmethod
    async def get(cls) -> "Config":
        """
        Load the configuration instance from the server using `TOML`.
        """

        dav_file = DavFile("config.txt")

        try:
            return cls.parse_obj(
                toml_loads(await dav_file.string)
            )

        except RemoteResourceNotFound:
            buffer = BytesIO()
            toml_dump(cls().dict(), buffer)
            buffer.seek(0)

            await dav_file.dump(buffer.read())

        return cls()