"""
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 ...core.config import Config, TickerUIConfig, get_config
from ...core.dav_common import webdav_ensure_files, webdav_ensure_path
from ...core.webdav import WebDAV
from .text import _fpu, _rp

_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.")

    remote_path = await _rp()
    if not webdav_ensure_path(remote_path):
        webdav_ensure_files(
            remote_path,
            "ticker.txt",
        )


async def get_ticker_lines() -> Iterator[str]:
    cfg = await get_config()
    file_name = await _fpu(cfg.ticker.file_name)
    remote_path = await _rp()

    ticker = await WebDAV.read_str(f"{remote_path}/{file_name}")

    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 get_config()

    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 get_config()
    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")
async def get_ui_config(
    cfg: Config = Depends(get_config),
) -> TickerUIConfig:
    return cfg.ticker