"""Config-correctness tests for the CI version-bump/tag/changelog automation
(gitea #50). The workflow YAML itself can only be exercised by a real push to
master, so these check the two config files it drives (.bumpversion.toml,
cliff.toml) against real repo content instead.
"""

import re
import shutil
import subprocess
import tomllib
from pathlib import Path

import pytest

_ROOT = Path(__file__).resolve().parents[1]


def test_bumpversion_search_pattern_matches_pyproject():
    bump_config = tomllib.loads((_ROOT / ".bumpversion.toml").read_text())["tool"]["bumpversion"]
    current_version = bump_config["current_version"]
    search = bump_config["files"][0]["search"].format(current_version=current_version)

    pyproject = (_ROOT / "pyproject.toml").read_text()
    assert search in pyproject, (
        f"bumpversion search pattern {search!r} (rendered from .bumpversion.toml's "
        f"current_version={current_version!r}) not found in pyproject.toml — "
        "the bump would silently edit nothing"
    )


@pytest.mark.skipif(shutil.which("git-cliff") is None, reason="git-cliff binary not on PATH")
def test_cliff_config_groups_and_links_commits(tmp_path):
    repo = tmp_path / "repo"
    repo.mkdir()
    subprocess.run(["git", "init", "-q"], cwd=repo, check=True)
    subprocess.run(["git", "config", "user.name", "test"], cwd=repo, check=True)
    subprocess.run(["git", "config", "user.email", "test@example.com"], cwd=repo, check=True)

    _commit(repo, "Add class-balanced secondary particle-type loss (gitea #44)")
    _commit(repo, "Fix leaking secondary energy budget")
    _commit(repo, "Merge pull request 'Add X' (#1) from fix/issue-1 into master")
    _commit(repo, "chore: bump version 0.3.3 -> 0.3.4 [skip ci]")

    result = subprocess.run(
        [
            "git-cliff",
            "--config",
            str(_ROOT / "cliff.toml"),
            "--repository",
            str(repo),
            "--tag",
            "v0.3.4",
            "--unreleased",
        ],
        capture_output=True,
        text=True,
        check=True,
    )
    changelog = result.stdout

    assert "## [0.3.4]" in changelog
    assert "### Added" in changelog
    assert "### Fixed" in changelog
    assert re.search(
        r"\[gitea #44\]\(https://git\.larsbogner\.de/lars/giant/issues/44\)",
        changelog,
    )
    assert "Add class-balanced secondary particle-type loss" in changelog
    assert "Fix leaking secondary energy budget" in changelog
    assert "Merge pull request" not in changelog
    assert "skip ci" not in changelog


def _commit(repo: Path, message: str) -> None:
    (repo / "f.txt").write_text(message)
    subprocess.run(["git", "add", "f.txt"], cwd=repo, check=True)
    subprocess.run(["git", "commit", "-q", "-m", message], cwd=repo, check=True)