"""The hand-written IR projection is OPTIONAL, and its absence is said rather than raised
(S7b søm 1, ordre ``20260903T204605Z-215167684-from-.claude`` DEL A).

**The seam this closes was measured before it was built** (``docs/2026-09-03-forslag-fra-mandat.md``
§ 1.1): ``okf.load_ir_projection`` is fail-fast required at THREE call sites, and an ingested tender
corpus carries no hand-written ``validator-input.json``, so such a base could be navigated
(``read_bundle``), catalogued (``list_bundles``) and judged through the deterministic mandate door
(``evaluate_mandate_candidates``, which never reads the file) — and still could not run the
eight-step loop at all. The refusal fired before the first model call, which is the one mercy it
had.

**The pattern is the repo's own, not a new one.** ``load_cost_baseline`` /
``load_optional_cost_baseline`` already say exactly this: ABSENCE is tolerated and the caller takes
a stance; a file that EXISTS but is malformed, or that disagrees with the run, still refuses. The
S4.0 row states the rule in one line — *"toleransen stopper ved fravær"* — and reading a corrupt
projection as "no projection" would hand back an unkeyed run wearing a keyed one's clothes.

**A pair, never a ``required=`` flag.** PM-tillegg 5 measured what an unexercised parameter costs:
all eleven ``evidence_for`` call sites used the default, so the other branch rotted until it raised.
A pair also keeps true the five docstrings across ``hitl``/``ledger``/``verdicts``/``contracts`` that
cite ``load_ir_projection`` as *the* fail-fast precedent.

**The project NAME was a non-question, and that is measured rather than assumed.** The archived
self-order flagged the fallback as a real decision. Measured: ``SavingsProposal`` has five fields
(``project_id``, ``measure``, ``affected_items``, ``claimed_saving_nok``, ``assumptions``) and none
of them is a name — the projection has never been a name source. ``Project.name`` comes from the
``type: project`` concept's ``title`` with the id as last resort, before and after, so there is no
new implicit ``project_id`` here; there is an old one, unchanged.

**Each of the three sites needed its OWN stance, which is why this is not one loader swap.**

* ``run._project_from_bundle`` — absence skips a fail-fast that has nothing to check against;
  a projection that is PRESENT and names another project still refuses. That divergence guard is
  what multi-base dispatch rests on ("den eksisterende fail-fasten blir rutingsnøkkelen"), so
  loosening absence must not loosen disagreement.
* ``run.run_mandate_across_bundles`` — the routed run's ``project_id``. FILE FIRST, the base's
  DECLARED ``bundle_id`` as the fallback (S7a-3). The precedence is load-bearing in the other
  direction too: every existing base whose ``project_id`` differs from its ``bundle_id`` must keep
  routing on the file.
* ``verdicts.bundle_candidate_features`` — the ExpeL query key, and the ONE place where absence is
  not merely tolerable. Two consumers, two different answers: the run's Step-1 fold SKIPS and SAYS
  how many prior verdicts did not reach the prompt, while ``seed_store_from_bundle``'s S3.2 fallback
  REFUSES BY NAME, because minting a key for a verdict that declares none is precisely the defect
  S3.2 closes.

**The visibility carrier is ``RunResult`` alone, and that is a measurement.**
``cost_baseline_anchored`` and ``skipped_links`` are both resolved above the ``live_dry_run`` cut
(``run.py``: the cut returns before generation), so both can be carried on ``DryRunReport``. The
ExpeL fold happens BELOW that cut — a dry run stops before it — so a ``DryRunReport`` field could
only ever report zero. It is not on ``ProvenanceStamp`` either, for ``skipped_links``' own reason:
this is a RUN-level fact settled once, before any candidate exists, whereas the stamp describes the
gate that judged ONE candidate.

**Predictable vacuity, hunted for deliberately.** The shipped fixtures declare no ``bundle_id``
(S7a-3 measured zero ``^bundle_id`` matches under ``tests/``), so on them the declared id and the
mount basename COINCIDE and a routing arm cannot tell the two apart — every routing arm here
therefore runs against a base crafted to declare an id differing from its directory name (M14's
lesson). And an arm that asserts only ``pytest.raises`` cannot discriminate when both
implementations raise (M5's lesson), so the refusal arms assert the NAMED class plus a
distinguishing token.
"""

from __future__ import annotations

import json
import shutil
from pathlib import Path
from typing import Any

import pytest

from portfolio_optimiser import okf, run, verdicts
from portfolio_optimiser.mandate import Approach, Mandate
from portfolio_optimiser.run import RunResult
from portfolio_optimiser.simulation import scripted_factory
from portfolio_optimiser.verdicts import ProposalFeatures, VerdictStore, capture_verdict

_FIXTURES = Path(__file__).parent / "fixtures"
#: MAJOR-4's priced fixture. It ships WITHOUT a ``validator-input.json`` — that absence is the whole
#: subject here, so it is used exactly as it sits on disk unless an arm says otherwise.
_PRICED = str(_FIXTURES / "k2-prisskjema-SYNTETISK")
_PROJECT = "K2"

#: A proposal the deterministic gate validates against the fixture's derived schedule: 21.1 is
#: 1250 x 850 = 1 062 500, and ``energy_efficiency`` caps the claim at 15 % of that (F8's registry).
_PROPOSAL_JSON = json.dumps(
    {
        "project_id": _PROJECT,
        "measure": "energy_efficiency",
        "affected_items": [{"code": "21.1", "quantity": 1250.0, "unit_cost": 850.0}],
        "claimed_saving_nok": 100_000.0,
        "assumptions": {"21.1": [800.0, 900.0]},
    }
)


def _copy(tmp_path: Path, name: str, *, declared: str | None = None) -> Path:
    """A working copy of the priced fixture, optionally DECLARING a bundle id that differs from its
    mount name — the only shape under which a routing arm can distinguish declaration from mount."""
    root = tmp_path / name
    shutil.copytree(_PRICED, root)
    if declared is not None:
        for path in root.glob("*.md"):
            text = path.read_text(encoding="utf-8")
            path.write_text(
                text.replace("---\ntype:", f"---\nbundle_id: {declared}\ntype:", 1), "utf-8"
            )
    return root


def _write_projection(root: Path, project_id: str) -> None:
    (root / "validator-input.json").write_text(
        json.dumps(
            {
                "project_id": project_id,
                "measure": "energy_efficiency",
                "affected_items": [{"code": "21.1", "quantity": 1250.0, "unit_cost": 850.0}],
                "claimed_saving_nok": 100_000.0,
            }
        ),
        encoding="utf-8",
    )


def _factory(sink: list[str] | None = None) -> Any:
    return scripted_factory(
        {"proposer": _PROPOSAL_JSON, "checker": "VERDICT: APPROVE"},
        [] if sink is None else sink,
    )


async def _run(bundle_dir: str, *, sink: list[str] | None = None, **kwargs: Any) -> Any:
    return await run.run_project(
        _PROJECT,
        "local",
        docs_dir=bundle_dir,
        bundle_dir=bundle_dir,
        derive_cost_baseline=True,
        client_factory=_factory(sink),
        max_rounds=2,
        **kwargs,
    )


# --------------------------------------------------------------------------------------------
# (a) the loader pair itself
# --------------------------------------------------------------------------------------------


def test_the_optional_loader_returns_none_for_a_base_that_has_no_projection() -> None:
    assert okf.load_optional_ir_projection(_PRICED) is None
    with pytest.raises(FileNotFoundError):
        okf.load_ir_projection(_PRICED)


def test_the_optional_loader_returns_the_projection_when_the_base_has_one(tmp_path: Path) -> None:
    root = _copy(tmp_path, "with-projection")
    _write_projection(root, _PROJECT)
    loaded = okf.load_optional_ir_projection(str(root))
    assert loaded is not None
    assert loaded["project_id"] == _PROJECT


def test_the_tolerance_stops_at_absence_a_malformed_projection_still_raises(
    tmp_path: Path,
) -> None:
    """S4.0's rule, transplanted verbatim: reading a corrupt projection as "no projection" would
    hand back an unkeyed run under the appearance of a keyed one."""
    root = _copy(tmp_path, "malformed")
    (root / "validator-input.json").write_text("{not json", encoding="utf-8")
    with pytest.raises(json.JSONDecodeError):
        okf.load_optional_ir_projection(str(root))


# --------------------------------------------------------------------------------------------
# (b) the run path: a base with no projection runs the WHOLE loop
# --------------------------------------------------------------------------------------------


async def test_a_base_without_a_projection_runs_the_whole_pipeline() -> None:
    """THE HEADLINE. Before this seam the same call raised ``FileNotFoundError`` from
    ``_project_from_bundle`` — before the first model call, which is why an ingested corpus could be
    navigated and never run."""
    result = await _run(_PRICED)
    assert isinstance(result, RunResult)
    assert result.provenance.validator_decision in {"validated", "rejected"}
    assert result.provenance.cost_baseline_anchored is True


async def test_a_projection_that_names_another_project_still_refuses(tmp_path: Path) -> None:
    """The divergence guard, which multi-base dispatch rests on. Absence became tolerable;
    DISAGREEMENT did not, and a loader swap that loosened both would be green on every other arm
    here."""
    root = _copy(tmp_path, "wrong-project")
    _write_projection(root, "SOMEONE-ELSE")
    with pytest.raises(ValueError) as excinfo:
        await _run(str(root))
    message = str(excinfo.value)
    assert "SOMEONE-ELSE" in message
    assert _PROJECT in message


async def test_a_base_that_carries_the_projection_runs_exactly_as_before(tmp_path: Path) -> None:
    """The control the order asks for: with the file present nothing about the run changes."""
    root = _copy(tmp_path, "runnable")
    _write_projection(root, _PROJECT)
    result = await _run(str(root))
    assert isinstance(result, RunResult)
    assert result.provenance.validator_decision in {"validated", "rejected"}


# --------------------------------------------------------------------------------------------
# (c) the dispatcher's routing key: file first, declared bundle id as the fallback
# --------------------------------------------------------------------------------------------


async def test_the_dispatcher_routes_a_projectionless_base_on_its_declared_id(
    tmp_path: Path,
) -> None:
    """``run_mandate_across_bundles`` takes no ``project_id`` parameter BY DESIGN — it reads each
    base's own. Without a projection the base's DECLARED id is what remains, and S7a-3 already made
    that the identity every other door uses."""
    declared = "k2-trinn1-20260903"
    root = _copy(tmp_path, "mounted-elsewhere", declared=declared)
    assert Path(root).name != declared  # the two are genuinely distinct here

    result = await run.run_mandate_across_bundles(
        Mandate(
            objective="Finn besparelser",
            approaches=(Approach(id="a1", label="Tiltak", bundle_id=declared),),
            allow_own_proposals=True,
        ),
        (str(root),),
        "local",
        client_factory=_factory(),
        max_rounds=2,
    )
    assert [r.bundle_id for r in result.runs] == [declared]
    assert [r.project_id for r in result.runs] == [declared]


async def test_the_dispatcher_still_prefers_the_projection_when_the_base_has_one(
    tmp_path: Path,
) -> None:
    """PRECEDENCE, and it is load-bearing in the direction the headline arm cannot see: every base
    whose ``project_id`` differs from its ``bundle_id`` must keep routing on the FILE. The base here
    declares both, and they disagree — an implementation that read the declared id first would send
    the run under the wrong project name while every other arm stayed green."""
    declared = "k2-trinn1-20260903"
    root = _copy(tmp_path, "both-known", declared=declared)
    _write_projection(root, _PROJECT)
    assert _PROJECT != declared

    result = await run.run_mandate_across_bundles(
        Mandate(
            objective="Finn besparelser",
            approaches=(Approach(id="a1", label="Tiltak", bundle_id=declared),),
            allow_own_proposals=True,
        ),
        (str(root),),
        "local",
        client_factory=_factory(),
        max_rounds=2,
    )
    assert [r.project_id for r in result.runs] == [_PROJECT]


# --------------------------------------------------------------------------------------------
# (d) the ExpeL fold: skipped for want of a key, and SAID
# --------------------------------------------------------------------------------------------


#: A rationale that appears nowhere in the fixture, so its presence in a prompt can only come from
#: the ExpeL fold (``simulate_learning_loop``'s marker rule).
_MARKER = "TIDLIGERE-DOM-MARKOER"


def _store() -> VerdictStore:
    return VerdictStore(
        verdicts=[
            capture_verdict(
                ProposalFeatures(
                    affected_codes=frozenset({"21.1"}),
                    measure_type="energy_efficiency",
                    claimed_saving_nok=90_000.0,
                ),
                "approved",
                _MARKER,
            ),
            capture_verdict(
                ProposalFeatures(
                    affected_codes=frozenset({"36.1"}),
                    measure_type="ventilation",
                    claimed_saving_nok=50_000.0,
                ),
                "rejected",
                "tidligere dom nummer to",
            ),
        ]
    )


async def test_prior_verdicts_that_could_not_be_keyed_are_counted_not_silently_dropped() -> None:
    """Without a projection there is no pre-hypothesis candidate to key the fold against, so the
    fold cannot run. The run says how MANY prior verdicts therefore never reached the hypothesis
    prompt — the ``BudgetExceeded`` kø-(y) rule applied to a fold: "it did not happen" and "you lost
    two judgements" are different operative facts."""
    store = _store()
    sink: list[str] = []
    result = await _run(_PRICED, store=store, sink=sink)
    assert isinstance(result, RunResult)
    assert result.unkeyed_verdicts == 2
    # THE DISCRIMINATOR: a counter can be wired to anything, so the arm reads the PROMPT the fold
    # would have written into. The marker is a rationale that exists only in this store.
    assert not any(_MARKER in prompt for prompt in sink)


async def test_a_run_whose_fold_was_keyed_counts_none(tmp_path: Path) -> None:
    """The control. A constant-count implementation and a constant-zero one are both green without
    this pair — and it is what makes the renderer's OMISSION itself gated."""
    root = _copy(tmp_path, "keyed")
    _write_projection(root, _PROJECT)
    sink: list[str] = []
    result = await _run(str(root), store=_store(), sink=sink)
    assert isinstance(result, RunResult)
    assert result.unkeyed_verdicts == 0
    # And the fold genuinely RAN — without this the arm above would be green against an
    # implementation that never folds at all and merely counts zero here.
    assert any(_MARKER in prompt for prompt in sink)


def test_the_renderer_is_silent_when_every_prior_verdict_was_keyed() -> None:
    """Omission, never an empty row (``mandate.announce``'s rule, the one every ``*_notice``
    renderer here follows)."""
    assert run.unkeyed_verdicts_notice(0) is None
    line = run.unkeyed_verdicts_notice(2)
    assert line is not None
    assert "2" in line


def test_the_cli_prints_the_notice_for_a_projectionless_base_with_prior_verdicts(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch, capsys: pytest.CaptureFixture[str]
) -> None:
    """The renderer reaching stdout is its own seam (the ``cost_baseline_notice`` precedent: a
    renderer nothing calls is a line nobody sees). Driven through ``main()`` with the verdict inbox,
    which is the only route by which the CLI can hand ``run_project`` a non-empty store."""
    inbox = tmp_path / "inbox"
    inbox.mkdir()
    verdicts.write_verdict(str(inbox), _store().verdicts[0])

    monkeypatch.setattr(run, "_default_factory", lambda _profile: _factory())
    rc = run.main(
        [
            _PROJECT,
            "--docs-dir",
            _PRICED,
            "--bundle-dir",
            _PRICED,
            "--derive-cost-baseline",
            "--verdict-dir",
            str(inbox),
        ]
    )
    assert rc == 0
    assert "1 prior expert verdict" in capsys.readouterr().out


# --------------------------------------------------------------------------------------------
# (e) the seed fallback: REFUSED by name, never keyed on a guess
# --------------------------------------------------------------------------------------------


def _verdict_concept(root: Path, name: str, *, structural: bool) -> None:
    key = (
        'affected_codes: "21.1"\nmeasure_type: "energy_efficiency"\nclaimed_saving_nok: "90000"\n'
        if structural
        else ""
    )
    (root / name).write_text(
        f'---\ntype: verdict\ntitle: "Dom"\n{key}decision: approved\n---\n\nEn tidligere dom.\n',
        encoding="utf-8",
    )
    index = root / "index.md"
    index.write_text(
        index.read_text(encoding="utf-8") + f"\nOgsaa [dom]({name}).\n", encoding="utf-8"
    )


def test_a_verdict_without_its_own_key_in_a_projectionless_base_is_refused_by_name(
    tmp_path: Path,
) -> None:
    """S3.2's rule at the one point where absence is NOT tolerable. The pre-S3.2 fallback keys such
    a verdict on the bundle's projection candidate; with no projection there is no candidate, and
    minting one would attach the verdict to a candidate it is not about — the exact defect S3.2
    closes. Validation, never repair (``write_concept_file``'s rule)."""
    root = _copy(tmp_path, "unkeyable")
    _verdict_concept(root, "dom.md", structural=False)
    with pytest.raises(verdicts.VerdictKeyUnavailable) as excinfo:
        verdicts.seed_store_from_bundle(str(root))
    message = str(excinfo.value)
    assert "dom.md" in message
    assert "affected_codes" in message


def test_a_verdict_that_declares_its_own_key_seeds_without_any_projection(tmp_path: Path) -> None:
    """The control, and the reason the refusal above is NARROW: S3.2's fields are what
    ``promote_verdict`` writes, so a base grown by the loop itself seeds unchanged."""
    root = _copy(tmp_path, "self-keyed")
    _verdict_concept(root, "dom.md", structural=True)
    store = verdicts.seed_store_from_bundle(str(root))
    assert len(store.verdicts) == 1
    assert store.verdicts[0].proposal_features.affected_codes == frozenset({"21.1"})


# --------------------------------------------------------------------------------------------
# (f) DEL C — the report-mode partition (the gap økt 82 measured and reported)
# --------------------------------------------------------------------------------------------


def test_report_mode_refuses_a_mandate_instead_of_dropping_it(
    tmp_path: Path, capsys: pytest.CaptureFixture[str]
) -> None:
    """``--mandate`` was the one flag older than ``report_forbidden`` that never got a row, so
    ``--report --ledger X --mandate Y`` announced nothing and settled nothing — a SILENT DROP, the
    F4 class. The argv is one report mode would otherwise ACCEPT (a valid ``--ledger``, and the
    control proves rc 0 without the flag), so rc 1 is the mutant's opposite outcome rather than the
    same refusal arriving by another route."""
    ledger = tmp_path / "ledger.json"
    ledger.write_text(json.dumps([]), encoding="utf-8")
    mandate = tmp_path / "mandate.json"
    mandate.write_text(
        Mandate(objective="x", approaches=(Approach(id="a1", label="t"),)).model_dump_json(),
        encoding="utf-8",
    )
    assert run.main(["--report", "--ledger", str(ledger)]) == 0
    capsys.readouterr()
    rc = run.main(["--report", "--ledger", str(ledger), "--mandate", str(mandate)])
    assert rc == 1
    assert "mode-exclusive" in capsys.readouterr().err