import subprocess
from pathlib import Path
from typing import Union

import yt_dlp
from mergedeep import merge


class YDL:
    def __init__(self, ydl_opts: dict = None, extra_ydlp_opts: dict = None):
        self.ydl_opts = ydl_opts if ydl_opts else {}
        extra_ydlp_opts = extra_ydlp_opts if extra_ydlp_opts else {}
        self.ydl_opts = merge(ydl_opts, extra_ydlp_opts)
        self.ydl_opts['logger'] = self.ydl_opts.get('logger')
        self.yt_dlp = yt_dlp.YoutubeDL(ydl_opts)

    def get_formats(self, url: Union[str, Path]) -> tuple:
        """
        Not used since we're letting youtube-dl manage filesize filters for us.
        """
        sizes = []
        with self.yt_dlp as ydl:
            for video in ydl.extract_info(url, download=False)['formats']:
                d = {
                    'format_id': video['format_id'],
                    'format_note': video['format_note'],
                }
                if video.get('filesize'):
                    d['filesize'] = round(video['filesize'] / 1e+6, 1)  # MB
                else:
                    d['filesize'] = -1
                sizes.append(d)
        return tuple(sizes)

    def playlist_contents(self, url: str) -> Union[dict, bool]:
        ydl_opts = {
            'extract_flat': True,
            'skip_download': True,
            'ignoreerrors': True,
            'logger': self.ydl_opts['logger'],
        }
        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            info = self.get_info(url)
            if not info:
                return False
            entries = []
            if info['_type'] == 'playlist':
                if 'entries' in info.keys():
                    # When downloading a channel youtube-dl returns a playlist for videos and another for shorts.
                    # We need to combine all the videos into one list.
                    for item in info['entries']:
                        if item['_type'] in ('video', 'url'):
                            entries.append(item)
                        elif item['_type'] == 'playlist':
                            for video in self.get_info(item['webpage_url'])['entries']:
                                entries.append(video)
                        else:
                            raise ValueError(f"Unknown sub-media type: {item['_type']}")
            elif info['_type'] == 'video':
                # `info` doesn't seem to contain the `url` key so we'll add it manually.
                # If any issues arise in the future make sure to double check there isn't any weirdness going on here.
                entries.append(info)
                entries[0]['url'] = f"https://www.youtube.com/watch?v={info['id']}"
            else:
                raise ValueError(f"Unknown media type: {info['_type']}")
            return {
                'title': info['title'],
                'id': info['id'],
                'entries': entries,
            }

    # def filter_filesize(self, info, *, incomplete):
    #     duration = info.get('duration')
    #     if duration and duration < 60:
    #         return 'The video is too short'

    def extract_info(self, *args, **kwargs):
        return self.yt_dlp.extract_info(*args, **kwargs)

    def prepare_filename(self, *args, **kwargs):
        return self.yt_dlp.prepare_filename(*args, **kwargs)

    def process_info(self, *args, **kwargs):
        return self.yt_dlp.process_info(*args, **kwargs)

    def get_info(self, url):
        ydl_opts = {
            'extract_flat': True,
            'skip_download': True,
            'ignoreerrors': True,
            'logger': self.ydl_opts['logger'],
        }
        ydl = yt_dlp.YoutubeDL(ydl_opts)
        return ydl.sanitize_info(ydl.extract_info(url, download=False))

    def __call__(self, *args, **kwargs):
        return self.yt_dlp.download(*args, **kwargs)


def update_ytdlp():
    package_name = 'yt-dlp'
    try:
        result = subprocess.run(
            ["pip", "install", "--disable-pip-version-check", "--upgrade", package_name],
            capture_output=True,
            text=True,
            check=True
        )

        if f"Successfully installed {package_name}" in result.stdout:
        #     print(f"{package_name} was updated.")
            return True
        else:
            # print(f"{package_name} was not updated.")
            return False

    except subprocess.CalledProcessError as e:
        print(f"An error occurred while updating {package_name}:")
        print(e.output)
        return False


class ytdl_no_logger(object):
    def debug(self, msg):
        return

    def info(self, msg):
        return

    def warning(self, msg):
        return

    def error(self, msg):
        return


def get_output_templ(video_id: str = None, title: str = None, uploader: str = None, uploader_id: str = None, include_ext: bool = True):
    return f'[{video_id if video_id else "%(id)s"}] [{title if title else "%(title)s"}] [{uploader if uploader else "%(uploader)s"}] [{uploader_id if uploader_id else "%(uploader_id)s"}]{".%(ext)s" if include_ext else ""}'  # leading dash can cause issues due to bash args so we surround the variables in brackets