"""Runner-level wave-5b tests: suppression path and zero-image guard."""

import backend.agents.runner as runner_mod
from backend.agents.base import AgentResult
from backend.agents.runner import run_agent_pipeline


def _finding(sheets):
    return {
        "issue_id": "C1", "severity": "critical", "confidence": "high",
        "source_stage": "constructability", "sheets": sheets,
        "description": "HSS16x4 on (2) 2x6 STUD PACK is unbuildable",
        "evidence": [{"sheet": sheets[0], "source_text": "(2) 2x6 STUD PACK"}],
    }


def _stub_agent(artifacts):
    return lambda usage: type("S", (), {
        "name": "stub",
        "run": lambda self, scope: AgentResult(
            scope_id=scope.scope_id, artifacts=list(artifacts)),
    })()


def _patch_pipeline(monkeypatch, finding):
    monkeypatch.setattr(
        runner_mod, "convert_pdf_to_images",
        lambda path: [{"page_number": 1, "base64": "QUJD"}])
    monkeypatch.setattr(runner_mod, "SheetExtractorAgent", _stub_agent([
        {"sheet_number": "S401", "page_number": 1, "level": "roof",
         "discipline": "S", "assertions": [
             {"text": "(2) 2x6 STUD PACK", "object_type": "framing"},
             {"text": "HSS16X4 beam", "object_type": "framing"},
         ]},
    ]))
    monkeypatch.setattr(runner_mod, "SheetIndexAgent", _stub_agent([{}]))
    monkeypatch.setattr(runner_mod, "JurisdictionAgent", _stub_agent([{}]))
    monkeypatch.setattr(runner_mod, "LinkerAgent", _stub_agent([
        {"key": "c1", "location": "roof beam pocket", "assertions": []},
    ]))
    monkeypatch.setattr(runner_mod, "ConflictCriticAgent", _stub_agent([]))
    monkeypatch.setattr(runner_mod, "CodeAgent", _stub_agent([]))
    monkeypatch.setattr(runner_mod, "ConstructabilityAgent", _stub_agent([finding]))
    monkeypatch.setattr(runner_mod, "CompletenessAgent", _stub_agent([]))
    monkeypatch.setattr(
        runner_mod, "BrainAgent",
        lambda usage: type("B", (), {
            "run": lambda self, findings, sheet_index, jurisdiction:
                (list(findings), [])})())


def test_refuted_finding_is_suppressed_not_crash(monkeypatch, tmp_path):
    """Regression: memory.replace("suppressed", ...) must not KeyError."""
    _patch_pipeline(monkeypatch, _finding(["S401"]))
    monkeypatch.setattr(
        "backend.agents.verifier.call_json",
        lambda **kwargs: {"verdicts": [
            {"sheet": "S401", "source_text": "(2) 2x6 STUD PACK",
             "verdict": "corrected", "actual_text": "(5) 2x6 STUD PACK",
             "notes": "callout reads (5)"},
        ]})
    pdf = tmp_path / "dummy.pdf"
    pdf.write_bytes(b"%PDF-1.4\n")
    report = run_agent_pipeline(str(pdf), out_dir=str(tmp_path),
                                require_review=False)
    assert [f["issue_id"] for f in report["suppressed_issues"]] == ["C1"]
    assert report["suppressed_issues"][0]["verification"]["status"] == "refuted"


def test_zero_image_finding_is_not_suppressed(monkeypatch, tmp_path):
    """A finding whose sheets resolve to no page images must not be judged
    (and must never be refuted) without pixels."""
    _patch_pipeline(monkeypatch, _finding(["S999"]))  # no such sheet
    monkeypatch.setattr(
        "backend.agents.verifier.call_json",
        lambda **kwargs: {"verdicts": [
            {"sheet": "S999", "source_text": "(2) 2x6 STUD PACK",
             "verdict": "not_found", "actual_text": None, "notes": None},
        ]})
    pdf = tmp_path / "dummy.pdf"
    pdf.write_bytes(b"%PDF-1.4\n")
    report = run_agent_pipeline(str(pdf), out_dir=str(tmp_path),
                                require_review=False)
    assert report["suppressed_issues"] == []
    validated = report.get("validated_issues") or []
    assert any(f.get("issue_id") == "C1" for f in validated)