import os
import subprocess
import sys
import tarfile
import urllib.parse
import urllib.request
import zipfile


def filename(url):
    parsed = urllib.parse.urlparse(url)
    path = parsed.path
    filename = os.path.basename(path)

    if not filename:
        raise ValueError("No filename found in URL")

    return filename


def download(url, output):
    subprocess.run(["curl", "-L", "-o", output, url], check=True)


def tar_common_root(tar: tarfile.TarFile) -> str | None:
    root = None
    for member in tar.getmembers():
        this_root = member.path.split("/")[0]
        if root is None:
            root = this_root
        if this_root != root:
            return None
    return root


def zip_common_root(zip_file: zipfile.ZipFile) -> str | None:
    members = zip_file.infolist()
    if not members:
        return None
    root = None
    for member in members:
        path = member.filename.replace('\\', '/').lstrip('./').lstrip('/')
        if not path:
            continue
        this_root = path.split('/')[0]
        if this_root in ('', '.', '..'):
            continue
        if root is None:
            root = this_root
        elif this_root != root:
            return None
    return root


def download_decompress(url: str) -> str:
    download_path = f"./target/{filename(url)}"
    download(url, download_path)

    if download_path.endswith(".zip"):
        with zipfile.ZipFile(download_path, "r") as zip:
            common_root = zip_common_root(zip)
    else:
        with tarfile.open(download_path, "r") as tar:
            common_root = tar_common_root(tar)

    extract_dir = "./target"
    sources_dir = f"./target/{common_root}"
    if common_root in ["", ".", None]:
        extract_dir = "./target/sources"
        sources_dir = "./target/sources"

    if download_path.endswith(".zip"):
        with zipfile.ZipFile(download_path, "r") as zip:
            zip.extractall(extract_dir)
    else:
        with tarfile.open(download_path, "r") as tar:
            tar.extractall(extract_dir)

    return sources_dir


def sources_dir_name() -> str:
    with open("./target/sources.tag") as file:
        return file.read()


def source_url(url: str):
    if os.path.exists("./target/sources.tag"):
        return
    sources_dir = download_decompress(url)
    with open("./target/sources.tag", "wt+") as file:
        file.write(sources_dir)


def _git_repo_name(url: str) -> str:
    return url.split("/")[-1].replace(".git", "")


def source_git(url: str, branch: str | None = None):
    source_path = os.getcwd() + "/target/" + _git_repo_name(url)
    if os.path.exists("./target/sources.tag"):
        return
    cmdline = ["git", "clone", "--depth=1"]
    if branch:
        cmdline += ["-b", branch]
    cmdline += [url, source_path]
    subprocess.run(cmdline, check=True)
    with open("./target/sources.tag", "wt+") as file:
        file.write(source_path)