from __future__ import annotations

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


RUNTIME = Path(__file__).resolve().parents[1] / "runtime"
if str(RUNTIME) not in sys.path:
    sys.path.insert(0, str(RUNTIME))

import semantic_surface_extractor as extractor  # noqa: E402


REPO_ROOT = Path(__file__).resolve().parents[2]


class SemanticSurfaceExtractorTest(unittest.TestCase):
    def setUp(self) -> None:
        self.tempdir = tempfile.TemporaryDirectory()
        self.root = Path(self.tempdir.name)
        (self.root / "harness/source").mkdir(parents=True)
        shutil.copyfile(REPO_ROOT / extractor.DEFAULT_POLICY, self.root / extractor.DEFAULT_POLICY)
        (self.root / "raw/branch-notes").mkdir(parents=True)

    def tearDown(self) -> None:
        self.tempdir.cleanup()

    def _write(self, body: str, *, exclusions: list[str] | None = None) -> Path:
        excluded = "\n".join(f"  - {item}" for item in exclusions or [])
        path = self.root / "raw/branch-notes/feature-semantic-fixture.md"
        path.write_text(
            "---\n"
            "title: 의미 fixture\n"
            "source_type: branch-note\n"
            "status: verified\n"
            + (f"semantic_surface_exclusions:\n{excluded}\n" if excluded else "")
            + "---\n\n"
            + body,
            encoding="utf-8",
        )
        return path

    def test_alias_is_one_logical_surface_and_exclusions_close_coverage(self) -> None:
        path = self._write(
            "<!-- section-id: branch-scope -->\n## 범위\n포함한다.\n",
            exclusions=[
                "branch-contract-packet|fixture scope",
                "decision-evidence|fixture scope",
                "implementation|fixture scope",
                "edge-failure-dependency|fixture scope",
                "claims-to-verify|fixture scope",
            ],
        )
        result = extractor.check(self.root, paths=[path])
        self.assertEqual(result["status"], "PASS")
        self.assertEqual(result["coverage"], {
            "eligible_surface_blocks": 6,
            "extracted_surface_blocks": 1,
            "explicitly_excluded_blocks": 5,
            "uncovered_surface_blocks": 0,
        })
        self.assertEqual(result["documents"][0]["surfaces"][0]["section_id"], "scope")
        self.assertNotIn("LEGACY_SEMANTIC_SURFACE", {item["code"] for item in result["findings"]})

    def test_legacy_heading_warns_but_does_not_fail(self) -> None:
        path = self._write(
            "## 구현 가이드\n구현한다.\n",
            exclusions=[
                "branch-contract-packet|legacy fixture",
                "scope|legacy fixture",
                "decision-evidence|legacy fixture",
                "edge-failure-dependency|legacy fixture",
                "claims-to-verify|legacy fixture",
            ],
        )
        result = extractor.check(self.root, paths=[path])
        self.assertEqual(result["status"], "PASS")
        self.assertIn("LEGACY_SEMANTIC_SURFACE", {item["code"] for item in result["findings"]})

    def test_silent_drop_fails_closed(self) -> None:
        path = self._write("<!-- section-id: scope -->\n## 범위\n내용\n")
        result = extractor.check(self.root, paths=[path])
        self.assertEqual(result["status"], "FAIL")
        self.assertEqual(result["coverage"]["uncovered_surface_blocks"], 5)
        self.assertEqual(
            result["coverage"]["eligible_surface_blocks"],
            result["coverage"]["extracted_surface_blocks"]
            + result["coverage"]["explicitly_excluded_blocks"]
            + result["coverage"]["uncovered_surface_blocks"],
        )

    def test_project_is_always_required_and_canonical_layout_uses_vault_only(self) -> None:
        policy = extractor.load_policy(self.root)
        self.assertTrue(extractor.is_required({"source_type": "project-note", "status": "raw"}, policy))
        (self.root / "harness/source/vault-layout.json").write_text(
            json.dumps({"schema_version": "vault-layout/v1", "mode": "canonical", "vault_root": "vault"}),
            encoding="utf-8",
        )
        legacy = self._write(
            "<!-- section-id: scope -->\n## 범위\nlegacy\n",
            exclusions=[
                "branch-contract-packet|fixture",
                "decision-evidence|fixture",
                "implementation|fixture",
                "edge-failure-dependency|fixture",
                "claims-to-verify|fixture",
            ],
        )
        canonical = self.root / "vault/10-projects/sample/branch-notes/feature-canonical.md"
        canonical.parent.mkdir(parents=True)
        canonical.write_bytes(legacy.read_bytes())
        selected = extractor.eligible_documents(self.root, policy, required_only=True, mode="local")
        self.assertEqual(selected, (canonical.resolve(),))
        result = extractor.check(self.root, paths=selected)
        self.assertEqual(result["status"], "PASS")
        self.assertEqual(result["documents"][0]["path"], "vault/10-projects/sample/branch-notes/feature-canonical.md")

        legacy.unlink()
        legacy.symlink_to(Path("../../") / canonical.relative_to(self.root))
        replay = extractor.extract_document(self.root, legacy, policy)
        self.assertEqual(replay["path"], "raw/branch-notes/feature-semantic-fixture.md")


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