"""Regression tests for FU-6.

GAP-16 (INV-QA consistency): ``check_neutral_background`` must NOT return a
``severity='critical'`` result while ``passed=True``. The empty/missing
block-ו fallback now reports ``severity='warning'`` (consistent with passed).

GAP-15 (INV-EX3 / INV-QA3): ``export_docx`` must refuse to export while
critical QA gates fail OR before any QA run exists. It gates on the STORED
``qa_results`` (cheap SELECT via ``db.get_critical_qa_failures`` /
``db.qa_run_exists``) — it does NOT re-run the LLM validator.

All tests run fully OFFLINE — the pool / db helpers / exporter / git are
monkeypatched. No live Postgres needed.
"""

from __future__ import annotations

import asyncio
import json

import pytest

from legal_mcp.services import db
from legal_mcp.services import qa_validator
from legal_mcp.tools import drafting


# ── GAP-16 ────────────────────────────────────────────────────────

def test_neutral_background_empty_block_is_warning_not_critical() -> None:
    """Empty/missing block-ו → passed=True, so severity must be 'warning'."""
    res = qa_validator.check_neutral_background([])  # no block-vav present
    assert res["passed"] is True
    assert res["severity"] == "warning", (
        "a passed result must not carry severity='critical' (GAP-16)"
    )


def test_neutral_background_dirty_block_still_critical_path_untouched() -> None:
    """A block-ו with judgment words still fails — fix didn't soften real checks."""
    bad_word = qa_validator.VALUE_WORDS[0]
    res = qa_validator.check_neutral_background(
        [{"block_id": "block-vav", "content": f"הרקע: {bad_word} מאוד"}]
    )
    assert res["passed"] is False
    assert res["errors"], "judgment-word violation should be reported"


# ── GAP-15 ────────────────────────────────────────────────────────

@pytest.fixture()
def patched_export(monkeypatch: pytest.MonkeyPatch) -> dict:
    """Monkeypatch case lookup, exporter, draft-path setter, and git so that
    ``export_docx`` is isolated to the QA-gate decision. Returns a dict of
    call-tracking flags.
    """
    calls = {"exported": False, "set_draft": False, "committed": False}

    async def _get_case_by_number(case_number: str) -> dict:
        return {"id": "00000000-0000-0000-0000-000000000001"}

    async def _export_decision(case_id, output_path=None) -> str:
        calls["exported"] = True
        return "/tmp/decision.docx"

    async def _set_active_draft_path(case_id, path) -> None:
        calls["set_draft"] = True

    def _commit_and_push(case_dir, msg) -> None:
        calls["committed"] = True

    # find_case_dir is called only on the success path; make it a no-op dir
    class _FakeDir:
        def exists(self) -> bool:
            return False

    monkeypatch.setattr(db, "get_case_by_number", _get_case_by_number)
    monkeypatch.setattr(drafting.config, "find_case_dir", lambda cn: _FakeDir())
    monkeypatch.setattr(drafting.git_sync, "commit_and_push", _commit_and_push)
    # docx_exporter / set_active_draft_path are looked up dynamically; patch both
    import legal_mcp.services.docx_exporter as docx_exporter
    monkeypatch.setattr(docx_exporter, "export_decision", _export_decision)
    monkeypatch.setattr(db, "set_active_draft_path", _set_active_draft_path)
    return calls


def _run(coro):
    return asyncio.run(coro)


def test_export_blocked_when_no_qa_run(
    patched_export: dict, monkeypatch: pytest.MonkeyPatch
) -> None:
    async def _qa_run_exists(case_id) -> bool:
        return False

    async def _get_critical(case_id) -> list:
        return []

    monkeypatch.setattr(db, "qa_run_exists", _qa_run_exists)
    monkeypatch.setattr(db, "get_critical_qa_failures", _get_critical)

    out = json.loads(_run(drafting.export_docx("8001-24")))
    assert out["status"] == "error"
    assert "QA" in out["message"] or "validate_decision" in out["message"]
    assert patched_export["exported"] is False, "must not call the exporter"
    assert patched_export["committed"] is False, "must not git-commit"


def test_export_blocked_when_critical_failures(
    patched_export: dict, monkeypatch: pytest.MonkeyPatch
) -> None:
    async def _qa_run_exists(case_id) -> bool:
        return True

    async def _get_critical(case_id) -> list:
        return [
            {"check_name": "claims_coverage", "severity": "critical",
             "passed": False, "errors": []},
            {"check_name": "structural_integrity", "severity": "critical",
             "passed": False, "errors": []},
        ]

    monkeypatch.setattr(db, "qa_run_exists", _qa_run_exists)
    monkeypatch.setattr(db, "get_critical_qa_failures", _get_critical)

    out = json.loads(_run(drafting.export_docx("8001-24")))
    # GAP-48: {status,data,message} envelope; failed_gates rides in data.
    assert out["status"] == "error"
    assert out["data"]["failed_gates"] == ["claims_coverage", "structural_integrity"]
    assert "claims_coverage" in out["message"]
    assert patched_export["exported"] is False, "must not call the exporter"
    assert patched_export["committed"] is False, "must not git-commit"


def test_export_proceeds_when_clean(
    patched_export: dict, monkeypatch: pytest.MonkeyPatch
) -> None:
    async def _qa_run_exists(case_id) -> bool:
        return True

    async def _get_critical(case_id) -> list:
        return []

    monkeypatch.setattr(db, "qa_run_exists", _qa_run_exists)
    monkeypatch.setattr(db, "get_critical_qa_failures", _get_critical)

    out = json.loads(_run(drafting.export_docx("8001-24")))
    # GAP-48: success is envelope status "ok"; payload (path) rides in data.
    assert out["status"] == "ok", out
    assert out["data"]["path"] == "/tmp/decision.docx"
    assert patched_export["exported"] is True, "clean QA must allow export"
    assert patched_export["set_draft"] is True, "active_draft_path must be set"
