"""Cutover-layout 하드닝 회귀 모음.

vault canonical cutover 이후 발견된 '조용한 검사기 / 심링크 맹점' 계열 결함들의 회귀를
막는다. 각 테스트는 고친 결함이 되살아나면 실패한다.
"""

from __future__ import annotations

import json
from pathlib import Path
import sys
import tempfile
import unittest


RUNTIME = Path(__file__).resolve().parents[1] / "runtime"
sys.path.insert(0, str(RUNTIME))

import proof_manifest  # noqa: E402
import source_hygiene  # noqa: E402
import semantic_surface_extractor as sse  # noqa: E402
import semantic_certificate as sc  # noqa: E402
import typed_contract_check  # noqa: E402


class ProofManifestSymlinkTest(unittest.TestCase):
    """#22 — ``_atomic_write_json`` 의 os.replace 가 심링크를 실파일로 갈아치우면 안 된다."""

    def test_output_writes_through_symlink_and_keeps_link(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            (root / "vault").mkdir()
            canonical = root / "vault" / "manifest.json"
            canonical.write_text("{}\n", encoding="utf-8")
            link = root / "manifest.json"
            link.symlink_to("vault/manifest.json")
            proof_manifest._atomic_write_json(link, {"schema_version": "x", "status": "PASS"})
            self.assertTrue(link.is_symlink(), "심링크가 실파일로 대체되면 안 된다")
            self.assertIn("PASS", canonical.read_text(encoding="utf-8"))


class SourceHygieneContentRootsTest(unittest.TestCase):
    """#21 — 콘텐츠 스캔 루트를 'vault' 하드코딩이 아니라 레이아웃에서 도출한다."""

    def test_fallback_prefers_vault_when_present(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            (root / "vault").mkdir()
            roots = source_hygiene._content_roots(root)
            self.assertEqual(roots, [root / "vault"])

    def test_fallback_uses_legacy_roots_when_no_vault(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            (root / "raw").mkdir()
            (root / "wiki").mkdir()
            roots = set(source_hygiene._content_roots(root))
            self.assertEqual(roots, {root / "raw", root / "wiki"})


class ZeroDocumentGuardTest(unittest.TestCase):
    """#10 — 자동 탐색이 0건이면 '검사할 게 없어 PASS' 로 조용히 넘어가면 안 된다."""

    def test_surface_extractor_auto_zero_fails(self) -> None:
        original = sse.eligible_documents
        sse.eligible_documents = lambda *a, **k: ()
        try:
            result = sse.check(Path("."))
            codes = {item["code"] for item in result["findings"]}
            self.assertEqual(result["status"], "FAIL")
            self.assertIn("NO_ELIGIBLE_DOCUMENTS", codes)
        finally:
            sse.eligible_documents = original

    def test_surface_extractor_explicit_empty_is_vacuous_pass(self) -> None:
        result = sse.check(Path("."), paths=[])
        self.assertEqual(result["status"], "PASS")
        self.assertEqual(result["document_count"], 0)

    def test_certificate_auto_zero_fails(self) -> None:
        original = sse.eligible_documents
        sse.eligible_documents = lambda *a, **k: ()
        try:
            result = sc.check(Path("."))
            codes = {item["code"] for item in result["findings"]}
            self.assertEqual(result["status"], "FAIL")
            self.assertIn("NO_REQUIRED_DOCUMENTS", codes)
        finally:
            sse.eligible_documents = original


class TypedContractRecursiveScanTest(unittest.TestCase):
    """#23 — document_roots 가 nested 트리를 가리켜도 문서를 놓치지 않는다(rglob)."""

    def test_nested_documents_are_discovered(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            nested = root / "content" / "a" / "b"
            nested.mkdir(parents=True)
            (nested / "deep.md").write_text("---\ntitle: t\n---\n# deep\n", encoding="utf-8")
            (root / "content" / "top.md").write_text("---\ntitle: t\n---\n# top\n", encoding="utf-8")
            config = {"document_roots": ["content"]}
            docs = typed_contract_check._documents(root, config)
            slugs = {d.slug for d in docs}
            self.assertIn("deep", slugs, "nested 문서를 non-recursive glob 이 놓치면 안 된다")
            self.assertIn("top", slugs)


if __name__ == "__main__":
    unittest.main()