import importlib.util
from pathlib import Path
import subprocess

SCRIPT = Path(__file__).resolve().parents[1] / "scripts/check_generated_only_commit.py"
spec = importlib.util.spec_from_file_location("guard", SCRIPT)
guard = importlib.util.module_from_spec(spec)
spec.loader.exec_module(guard)


def test_source_change_is_required_with_generated_indexes():
    assert guard.standalone(["WORK-RECORDS.md", "docs/publication-index.md"])
    assert guard.standalone(["docs/source-inventory.json", "generated/index.json"])
    assert not guard.standalone(["WORK-RECORDS.md", "scripts/issuer.py"])
    assert not guard.standalone([])
    assert not guard.standalone(["canon/standards/work-record-types_v0.1.md"])


def test_evidence_packets_and_generated_brief_need_source_change():
    assert guard.standalone(["docs/evidence/run/receipt.json", ".custodian-brief.md"])
    assert guard.standalone(["docs/decision-packets/daily-batch.md"])
    assert guard.standalone(["docs/decision-packets-2026-10-03.md"])
    assert guard.standalone(["docs/attended-window/2026-10-11-daily-red-batch.md"])
    assert guard.standalone(["docs/evidence-packets/live-proof.md", "docs/source-index.md"])
    assert not guard.standalone(["docs/evidence/run/receipt.json", "scripts/verify_live.py"])
    assert not guard.standalone(["docs/implementation/delivery-protocol.md"])
    assert not guard.standalone(["docs/decisions/authorization.md"])


def test_ci_checks_each_commit_in_range(tmp_path):
    def git(*args):
        return subprocess.check_output(["git", *args], cwd=tmp_path).decode().strip()
    git("init", "-q")
    # This fixture deliberately creates a rejected historical commit so CI's
    # range checker can inspect it. Isolate it from the workstation's real hook.
    hooks = tmp_path / "fixture-hooks"
    hooks.mkdir()
    git("config", "core.hooksPath", str(hooks))
    git("config", "user.name", "Test")
    git("config", "user.email", "test@example.test")
    (tmp_path / "source.py").write_text("source\n")
    git("add", ".")
    git("commit", "-qm", "source")
    base = git("rev-parse", "HEAD")
    (tmp_path / "WORK-RECORDS.md").write_text("generated\n")
    git("add", ".")
    git("commit", "-qm", "generated only")
    (tmp_path / "source.py").write_text("changed\n")
    git("add", ".")
    git("commit", "-qm", "source again")
    result = subprocess.run(["python3", str(SCRIPT), "--range", base + "..HEAD"],
                            cwd=tmp_path, capture_output=True, text=True)
    assert result.returncode == 1
    assert "Generated-only commits rejected" in result.stderr