import re
import subprocess
import typing
from pathlib import Path

import tomllib
import urllib3
from packaging.requirements import Requirement
from packaging.version import Version


def main():
    with open(Path(__file__).parent / "pyproject.toml", "rb") as f:
        pyproject = tomllib.load(f)

    all_versions = get_all_versions()
    current_version = get_current_version(pyproject=pyproject)
    target_versions = [v for v in all_versions if v > current_version]

    for version in target_versions:
        paths = process_version(version)
        if subprocess.check_output(["git", "status", "-s"]).strip():
            subprocess.run(["git", "add", *paths])
            subprocess.run(["git", "commit", "-m", f"Mirror: {version}"])
            subprocess.run(["git", "tag", f"v{version}"])
        else:
            print(f"No change v{version}")


def get_all_versions() -> typing.List[Version]:
    response = urllib3.request("GET", "https://pypi.org/pypi/ruff/json")
    if response.status != 200:
        raise RuntimeError("Failed to fetch versions from pypi")

    versions = [Version(release) for release in response.json()["releases"]]
    return sorted(versions)


def get_current_version(pyproject: dict) -> Version:
    requirements = [Requirement(d) for d in pyproject["project"]["dependencies"]]
    requirement = next((r for r in requirements if r.name == "ruff"), None)
    assert requirement is not None, "pyproject.toml does not have ruff requirement"

    specifiers = list(requirement.specifier)
    assert (
        len(specifiers) == 1 and specifiers[0].operator == "=="
    ), f"ruff's specifier should be exact matching, but `{requirement}`"

    return Version(specifiers[0].version)


def process_version(version: Version) -> typing.Sequence[str]:
    def replace_pyproject_toml(content: str) -> str:
        return re.sub(r'"ruff==.*"', f'"ruff=={version}"', content)

    def replace_readme_md(content: str) -> str:
        content = re.sub(r"rev: v\d+\.\d+\.\d+", f"rev: v{version}", content)
        return re.sub(r"/ruff/\d+\.\d+\.\d+\.svg", f"/ruff/{version}.svg", content)

    paths = {
        "pyproject.toml": replace_pyproject_toml,
        "README.md": replace_readme_md,
    }

    for path, replacer in paths.items():
        with open(path) as f:
            content = replacer(f.read())
        with open(path, mode="w") as f:
            f.write(content)

    return tuple(paths.keys())


if __name__ == "__main__":
    main()