import os
import tempfile
from typing import Optional
from urllib.request import urlopen

from ytdl_sub.entries.entry import Entry
from ytdl_sub.utils.ffmpeg import FFMPEG
from ytdl_sub.utils.file_handler import FileHandler
from ytdl_sub.utils.retry import retry


class ThumbnailTypes:
    LATEST_ENTRY = "latest_entry"


def convert_download_thumbnail(entry: Entry, error_if_not_found: bool = True) -> None:
    """
    Converts an entry's downloaded thumbnail into jpg format

    Parameters
    ----------
    entry
        Entry with the thumbnail
    error_if_not_found
        If the thumbnail is not found, error if True.

    Raises
    ------
    ValueError
        Entry thumbnail file not found
    """
    download_thumbnail_path = entry.get_ytdlp_download_thumbnail_path()
    download_thumbnail_path_as_jpg = entry.get_download_thumbnail_path()

    # If it was already converted, do not convert again
    if os.path.isfile(download_thumbnail_path_as_jpg):
        return

    if not download_thumbnail_path:
        if error_if_not_found:
            raise ValueError("Thumbnail not found")
        return

    if not download_thumbnail_path == download_thumbnail_path_as_jpg:
        FFMPEG.run(["-bitexact", "-i", download_thumbnail_path, download_thumbnail_path_as_jpg])
        FileHandler.delete(download_thumbnail_path)


@retry(times=3, exceptions=(Exception,))
def download_and_convert_url_thumbnail(
    thumbnail_url: Optional[str], output_thumbnail_path: str
) -> Optional[bool]:
    """
    Downloads and converts a thumbnail from a url into a jpg

    Parameters
    ----------
    thumbnail_url
        URL of the thumbnail
    output_thumbnail_path
        Thumbnail file destination after its converted to jpg

    Returns
    -------
    True to indicate it converted the thumbnail from url. None if the retry failed.
    """
    if not thumbnail_url:
        return None

    # timeout after 8 seconds
    with urlopen(thumbnail_url, timeout=1.0) as file:
        with tempfile.NamedTemporaryFile(delete=False) as thumbnail:
            thumbnail.write(file.read())

        try:
            os.makedirs(os.path.dirname(output_thumbnail_path), exist_ok=True)

            tmp_output_path = FFMPEG.tmp_file_path(
                relative_file_path=thumbnail.name, extension="jpg"
            )
            FFMPEG.run(["-bitexact", "-i", thumbnail.name, tmp_output_path])

            # Have FileHandler handle the move to a potential cross-device
            FileHandler.move(tmp_output_path, output_thumbnail_path)
        finally:
            FileHandler.delete(tmp_output_path)
            FileHandler.delete(thumbnail.name)

    return True