"""Phase 12 invariant tests (GREEN).

6 RETHROW sites addressed:
- Site 1 (L276 _load_credentials): added 'from e' (Pattern 1)
- Sites 2+3 (L878+L879 _default_send nested in run_with_tool_loop): added 'from None'
- Site 4 (L1336 _list_anthropic_models): migrated to Result[T] (the broken 'raise ErrorInfo from exc' bug)
- Site 5 (L2078 _send inside _send_gemini_cli): added 'from None'
- Site 6 (L2759 _dashscope_call): added 'from None'

KNOWN LIMITATION: the audit does not recognize 'raise X from e' / 'from None'
as Pattern 1 (compliant). The 5 remaining RETHROW sites are classified as
'suspicious' (INTERNAL_RETHROW) but NOT 'violation' (strict mode accepts).
Adding a Pattern 1 heuristic requires Tier 1 approval.
"""
import sys
sys.path.insert(0, ".")


def test_phase12_ai_client_rethrow_count_at_most_5():
    """After Phase 12: ai_client RETHROW count is <= 5 (was 7 at baseline)."""
    import json
    import subprocess
    r = subprocess.run(
        ["uv", "run", "python", "scripts/audit_exception_handling.py",
         "--include-baseline", "--json"],
        capture_output=True, text=True
    )
    data = json.loads(r.stdout)
    files = {f["filename"]: f for f in data["files"]}
    ai = files["src\\ai_client.py"]
    rethrow = sum(1 for x in ai["findings"] if x["category"] == "INTERNAL_RETHROW")
    # Phase 9 redo: -1 site (L1594 _list_gemini_models migrated to Result)
    # Phase 10: -1 site (BC site 1 migrated)
    # Phase 12: -1 site (site 4 migrated to Result)
    # Baseline was 7; expected <= 5 (7 - 1 - 1 - 1 = 4 actually, but Pattern 1 sites stay as RETHROW)
    assert rethrow <= 5, f"expected ai_client RETHROW <= 5 after Phase 12, got {rethrow}"


def test_phase12_list_anthropic_models_result_exists():
    """Site 4 migration: _list_anthropic_models_result helper exists."""
    import src.ai_client
    assert hasattr(src.ai_client, "_list_anthropic_models_result")


def test_phase12_legacy_functions_preserved():
    """Legacy functions preserved EXCEPT _list_anthropic_models OBLITERATED by cruft-removal Phase 4."""
    import src.ai_client
    # _default_send is nested inside run_with_tool_loop; check via getattr with fallback
    preserved = ("_load_credentials", "_dashscope_call")
    obliterated = ("_list_anthropic_models",)
    for name in preserved:
        assert hasattr(src.ai_client, name), f"{name} legacy function missing"
    # The nested _default_send is part of run_with_tool_loop (not a top-level attr)
    assert callable(getattr(src.ai_client, "run_with_tool_loop", None)), \
        "run_with_tool_loop must exist (contains nested _default_send)"
    for name in obliterated:
        assert not hasattr(src.ai_client, name), (
            f"{name} wrapper must be OBLITERATED (cruft-removal Phase 4); "
            f"callers must use {name}_result directly"
        )