"""Tests for the release tooling scripts (CI guard + changelog CLI)."""

import importlib.util
import json
import pathlib
import sys

ROOT = pathlib.Path(__file__).resolve().parents[2]


def _load(name, relpath):
    spec = importlib.util.spec_from_file_location(name, ROOT / relpath)
    mod = importlib.util.module_from_spec(spec)
    sys.modules[name] = mod
    spec.loader.exec_module(mod)
    return mod


check = _load("check_changelog", "scripts/check_changelog.py")
cli = _load("changelog_cli", "scripts/changelog_cli.py")


class TestGuardEvaluate:
    def test_clean_minor_bump_passes(self):
        assert check.evaluate("1.10.0", "v1.9.2", True, True) == []

    def test_bad_bump_flagged(self):
        problems = check.evaluate("1.11.0", "v1.9.2", True, True)  # skips a minor
        assert problems and "clean single-step" in problems[0]

    def test_unchanged_changelog_is_not_version_checked(self):
        # A docs/dependabot PR (no CHANGELOG edit) never trips the bump check.
        assert check.evaluate("5.0.0", "v1.9.2", False, True) == []

    def test_copy_drift_flagged_even_when_unchanged(self):
        problems = check.evaluate("1.9.2", "v1.9.2", False, False)
        assert any("out of sync" in p for p in problems)

    def test_missing_top_version_flagged_when_changed(self):
        problems = check.evaluate(None, "v1.9.2", True, True)
        assert any("no version entry" in p for p in problems)

    def test_first_release_from_no_tags(self):
        assert check.evaluate("0.1.0", "", True, True) == []


class TestChangelogCli:
    SAMPLE = "## v1.10.0 — June 11, 2026\n\n**Self-announcing** releases.\n"

    def test_top_version(self, tmp_path, capsys):
        f = tmp_path / "CHANGELOG.md"
        f.write_text(self.SAMPLE)
        cli.main(["x", "top-version", str(f)])
        assert capsys.readouterr().out == "1.10.0"

    def test_bump_kind(self, tmp_path, capsys):
        f = tmp_path / "CHANGELOG.md"
        f.write_text(self.SAMPLE)
        cli.main(["x", "bump-kind", str(f), "v1.9.2"])
        assert capsys.readouterr().out == "minor"

    def test_payload(self, tmp_path, capsys):
        f = tmp_path / "CHANGELOG.md"
        f.write_text(self.SAMPLE)
        cli.main(["x", "payload", str(f), "1.10.0"])
        out = json.loads(capsys.readouterr().out)
        assert out["version"] == "1.10.0"
        assert out["date_label"] == "June 11, 2026"
        # CLI emits raw markdown; Slack conversion happens later, in the Lambda.
        assert "**Self-announcing**" in out["notes"]