"""
Router "ticker" provides:

- getting the ticker's raw content
- getting the ticker's HTML content (using Markdown)
- getting the ticker's UI config
"""

from logging import getLogger
from typing import Iterator

from fastapi import APIRouter, Depends
from markdown import markdown

from ...config import Config, TickerUIConfig
from ...dav_common import webdav_ensure_files, webdav_ensure_path
from ...dav_file import DavFile
from .text import text_lister, text_unique

_logger = getLogger(__name__)

router = APIRouter(prefix="/ticker", tags=["text"])


@router.on_event("startup")
async def start_router() -> None:
    _logger.debug(f"{router.prefix} router starting.")

    webdav_ensure_path(await text_lister.remote_path)

    webdav_ensure_files(
        await text_lister.remote_path,
        "ticker.txt",
    )


async def get_ticker_lines() -> Iterator[str]:
    cfg = await Config.get()
    file_name = await text_unique(cfg.ticker.file_name)

    ticker = await DavFile(
        f"{await text_lister.remote_path}/{file_name}",
    ).as_string

    return (
        line.strip()
        for line in ticker.split("\n")
        if line.strip()
    )


async def get_ticker_content_lines(
    ticker_lines: Iterator[str] = Depends(get_ticker_lines),
) -> Iterator[str]:
    cfg = await Config.get()

    return (
        line
        for line in ticker_lines
        if not line.startswith(cfg.ticker.comment_marker)
    )


async def get_ticker_content(
    ticker_content_lines: Iterator[str] = Depends(get_ticker_content_lines),
) -> str:
    ticker_content_padded = ["", *ticker_content_lines, ""]
    if len(ticker_content_padded) == 2:
        return ""

    cfg = await Config.get()
    ticker_content = cfg.ticker.separator.join(
        ticker_content_padded,
    )

    return ticker_content.strip()


@router.get("/html")
async def get_ticker(
    ticker_content: str = Depends(get_ticker_content),
) -> str:
    return markdown(ticker_content)


@router.get("/raw")
async def get_raw_ticker(
    ticker_content: str = Depends(get_ticker_content),
) -> str:
    return ticker_content


@router.get(
    "/config",
    response_model=TickerUIConfig,
)
async def get_ui_config(
    cfg: Config = Depends(Config.get),
) -> TickerUIConfig:
    return cfg.ticker