from __future__ import annotations

import argparse
import contextlib
import datetime as dt
import functools
import itertools
import json
import os
import re
import subprocess
import urllib.parse
import urllib.request
import zipfile


def read_file(fname):
    with open(fname, encoding='utf-8') as f:
        return f.read()


def write_file(fname, content, mode='w'):
    with open(fname, mode, encoding='utf-8') as f:
        return f.write(content)


def read_version(fname='yt_dlp/version.py', varname='__version__'):
    """Get the version without importing the package"""
    items = {}
    exec(compile(read_file(fname), fname, 'exec'), items)
    return items[varname]


def calculate_version(version=None, fname='yt_dlp/version.py'):
    if version and '.' in version:
        return version

    revision = version
    version = dt.datetime.now(dt.timezone.utc).strftime('%Y.%m.%d')

    if revision:
        assert re.fullmatch(r'[0-9]+', revision), 'Revision must be numeric'
    else:
        old_version = read_version(fname=fname).split('.')
        if version.split('.') == old_version[:3]:
            revision = str(int(([*old_version, 0])[3]) + 1)

    return f'{version}.{revision}' if revision else version


def get_filename_args(has_infile=False, default_outfile=None):
    parser = argparse.ArgumentParser()
    if has_infile:
        parser.add_argument('infile', help='Input file')
    kwargs = {'nargs': '?', 'default': default_outfile} if default_outfile else {}
    parser.add_argument('outfile', **kwargs, help='Output file')

    opts = parser.parse_args()
    if has_infile:
        return opts.infile, opts.outfile
    return opts.outfile


def compose_functions(*functions):
    return lambda x: functools.reduce(lambda y, f: f(y), functions, x)


def run_process(*args, **kwargs):
    kwargs.setdefault('text', True)
    kwargs.setdefault('check', True)
    kwargs.setdefault('capture_output', True)
    if kwargs['text']:
        kwargs.setdefault('encoding', 'utf-8')
        kwargs.setdefault('errors', 'replace')
    return subprocess.run(args, **kwargs)


def request(url: str, *, headers: dict | None = None):
    req = urllib.request.Request(url, headers=headers or {})
    return contextlib.closing(urllib.request.urlopen(req))


def call_github_api(path: str, *, query: dict | None = None) -> dict | list:
    API_BASE_URL = 'https://api.github.com/'
    assert not path.startswith(('https://', 'http://')) or path.startswith(API_BASE_URL)

    url = urllib.parse.urlparse(urllib.parse.urljoin(API_BASE_URL, path))
    qs = urllib.parse.urlencode({
        **urllib.parse.parse_qs(url.query),
        **(query or {}),
    }, True)

    headers = {
        'Accept': 'application/vnd.github+json',
        'User-Agent': 'yt-dlp',
        'X-GitHub-Api-Version': '2026-03-10',
    }
    if gh_token := os.getenv('GH_TOKEN'):
        headers['Authorization'] = f'Bearer {gh_token}'

    with request(urllib.parse.urlunparse(url._replace(query=qs)), headers=headers) as resp:
        return json.load(resp)


def zipf_files_and_folders(zipf: zipfile.ZipFile, glob: str = '*') -> tuple[list[str], list[str]]:
    files = []
    folders = []

    path = zipfile.Path(zipf)
    for f in itertools.chain(path.glob(glob), path.rglob(glob)):
        if not f.is_file():
            continue
        files.append(f.at)
        folder = f.parent.at.rstrip('/')
        if folder and folder not in folders:
            folders.append(folder)

    return files, folders