"""P8 — the run SAYS what its delivered input can ground, before it spends an attempt on a proposal
that cannot be grounded.

P7 (økt 109) is right and landed: an identifier a proposal builds on must appear VERBATIM in the
input, or the verdict falls. Re-measuring it exposed a CONSEQUENCE no row stated. Over the three
free recordings, with the gate live, **29 of 29 cost codes in 13 of 13 delivered proposals are
ungrounded** — every one of them invented. That is not a fault in the gate. It is that the PROMPT
asks for something the delivered input cannot supply: ``_build_messages`` says each entry "must
restate a cost line as the project's price schedule already carries it", and MEASURED, K2's
delivered input carries **two** code-shaped tokens in the prompt (``SHA-01``/``SHA-10``), both of
them document numbers off a page footer, and ``derive_cost_baseline`` refuses the base outright —
there is no cost line in it to restate. A gate that always refuses is as useless as one that never
does, so the run must be able to say which of the two situations it is in.

**This is a REPORT, never a gate.** It does not block: a run with a null offer still runs, because
a blocking requirement is exactly ``--require-cost-baseline``, which F4 settled as opt-in and this
order freed. It also does not touch ``_ground_against_input``, which ten mutations hold.

Arms, each with a named detach point:

* **(a) the null offer is stated.** A delivered text with no identifier of any measured form and no
  baseline reports ``identifiers=0, cost_lines=0``. This is the K2 CONTROL — without it a green
  known positive proves nothing.
* **(b) the positive offer is stated.** N100's delivered input carries the BINDING known positive
  ``Krav 3.3.1—13`` (P7 premiss (vii): it stands in 6 of 6 prompts, EM-DASH U+2014), and the offer
  is positive there. Paired with a control that the search CAN find the string at all.
* **(c) the offer is measured on the SAME text the gate will see.** ``grounding_offer`` composes
  through ``generate._grounding_text`` — the one composer P7 uses — so a report built from a second
  rendering, free to disagree with the one that was sent, is impossible by construction.
* **(d) the offer reaches the outcome the operator reads**, on BOTH surfaces: ``RunResult`` after a
  full run and ``DryRunReport`` before the first model call. The dry-run arm is what proves the
  measurement happens BEFORE the three attempts are spent — its client factory RAISES.
* **(e) ONE renderer**, silent when the run CAN anchor a cost line (omission, never an empty row —
  ``cost_baseline_notice``'s rule), speaking when it cannot.
* **(f) a run that exhausts its attempts on ungrounded identifiers leaves the input-side diagnosis
  in the outcome**, not only "the model missed".

A NEW file rather than an extension of ``test_identifier_grounding_loadbearing.py``, stated as the
order asks: that file's subject is the GATE and it is held by ten mutations. A report mutated here
would go red in a file whose docstring promises a falsifier, and which seam a red test names is the
only thing a mutation table is for.

The fixtures are P7's own tracked generation prompts. Tracked test data on purpose (``scratchpad/``
is absent from ``git archive HEAD``) — and REUSED rather than extended with the delivered cuts,
because those cuts are 10 kB and 96 kB of a real Norwegian tender and a public road standard, and
committing corpus text into a repo published on ``open/`` is a publication decision that belongs to
the operator, not to this order. The 8-distinct / 435-distinct figures for the delivered cut and the
full grounding are MEASURED and reported in ``docs/2026-09-09-p8-forankringstilbudet.md``; what a
test asserts here is the property, on text this repo already ships.
"""

from __future__ import annotations

import json
from pathlib import Path

from portfolio_optimiser.generate import GroundingOffer, _grounding_text, grounding_offer
from portfolio_optimiser.ir import CostBaseline, CostBaselineLine
from portfolio_optimiser.reference_domain import CostItem, Project
from portfolio_optimiser import run as run_mod
from portfolio_optimiser.run import grounding_offer_notice, run_project
from portfolio_optimiser.simulation import scripted_factory
from portfolio_optimiser.validator import Grounding, Rejection

FIXTURES = Path(__file__).parent / "fixtures" / "p7-grounding"
SHARED = Path(__file__).resolve().parents[1] / "shared" / "examples"

#: P7 premiss (vii), the BINDING known positive: the model quoted this requirement number verbatim
#: in 6 of 6 replies and it stands in 6 of 6 prompts. EM-DASH (U+2014); the hyphen variant is 0/6.
KNOWN_POSITIVE = "Krav 3.3.1—13"

#: The base with a ``cost-baseline.json`` (one line) and the one without — the pair that makes the
#: renderer's omission arm reachable rather than asserted.
ANCHORED = SHARED / "veglys-fv-soer"
UNANCHORED = SHARED / "bygg-energi-mikro"
_UNANCHORED_PID = "BYGG-KONTOR-NORD"
_VERDICT_INPUT = {"decision": "approved", "rationale": "expert reviewed (sim)"}
_VALID_REPLY = (
    '{"measure":"LED-retrofit","affected_items":'
    '[{"code":"ENERGI-TOTAL-EL","quantity":300000,"unit_cost":1.0}],'
    '"claimed_saving_nok":30000}'
)
#: A code that appears NOWHERE in the base — the ungrounded case, which P7's stage 0b refuses on
#: every attempt, so the run exhausts its attempts and returns the last ``Rejection``.
_UNGROUNDED_REPLY = (
    '{"measure":"invented","affected_items":'
    '[{"code":"M-04-01","quantity":300000,"unit_cost":1.0}],'
    '"claimed_saving_nok":30000}'
)
_CHECKER_REPLY = "Reasoning holds.\nVERDICT: APPROVE"


def _prompt(name: str) -> str:
    return (FIXTURES / name).read_text(encoding="utf-8")


def _project(*codes: str) -> Project:
    """A project shaped like the bundle path's: ``_project_from_bundle`` builds ``cost_items=()``
    (MEASURED, P7's own row), so the default carries no codes of its own and the offer measures the
    delivered text alone."""
    return Project(
        id="X",
        name="X",
        description="",
        currency="NOK",
        cost_items=tuple(
            CostItem(code=c, description=c, quantity=1.0, unit="stk", unit_cost=1.0) for c in codes
        ),
        docs_dir="",
    )


def _baseline(*codes: str) -> CostBaseline:
    return CostBaseline(
        project_id="X",
        items={c: CostBaselineLine(quantity=1.0, unit_cost=1.0) for c in codes},
    )


# ------------------------------------------------------------------ (a) the null offer is stated


def test_a_delivered_input_with_no_cost_line_reports_zero() -> None:
    """LOAD-BEARING (a) — the K2 CONTROL. Both K2 generation prompts carry no identifier of any
    measured form and the run is un-anchored, so the offer is null in BOTH numbers. Without this
    control a green (b) would be satisfied by a report that always counts positive."""
    for name in ("p6-k2-generation-prompt.txt", "s7c-k2-generation-prompt.txt"):
        offer = grounding_offer(_project(), None, Grounding.of(_prompt(name)))
        assert offer.identifiers == 0, (name, offer)
        assert offer.cost_lines == 0, (name, offer)
        assert offer.chars > 0, "the measurement must have had text to measure"


# -------------------------------------------------------------- (b) the positive offer is stated


def test_the_known_positive_input_reports_a_positive_offer() -> None:
    """LOAD-BEARING (b) — the BINDING known positive. Paired with the control that the string is
    actually there: a report that finds nothing because it searched for nothing would otherwise
    pass (a) and look measured."""
    text = _prompt("p4-n100-generation-prompt.txt")
    assert KNOWN_POSITIVE in text, "the fixture no longer carries the known positive"
    offer = grounding_offer(_project(), None, Grounding.of(text))
    assert offer.identifiers > 0, offer
    assert offer.cost_lines == 0, "a road standard carries no cost lines (F4's own finding)"


def test_a_bare_number_is_not_counted_as_an_offer() -> None:
    """LOAD-BEARING (b), the other half. K2 carries 46 394 bare-number occurrences over 2 117
    distinct values (P7 § 2), so counting them would make every report positive and the whole
    measurement inert — the repo's cardinal class, a gate that can only come out green.

    **NARROWED in P19/B1, and the narrowing is a measured honesty limit rather than a weakening.**
    The list used to carry ``42.5`` as well. R761's requirement numbers — all six ``ref`` values in
    ``contexts/kontrakt-sorasen-2027/fasit.json`` — are ``12.1`` / ``52.11`` / ``22.1``, which is
    the SAME typography as a decimal. There is no rule that separates them, so the form counts
    both; the arm below states that in the open instead of leaving it in the docstring. What this
    arm still refuses is the class the K2 number was measured on: bare INTEGERS."""
    offer = grounding_offer(_project(), None, Grounding.of("1234 5678 90 1000000"))
    assert offer.identifiers == 0, offer


def test_a_dotted_number_is_counted_and_that_is_an_honesty_limit() -> None:
    """P19/B1: a decimal and an R761 process number are typographically the SAME token.

    Counted, therefore — which is the direction that keeps r761 measurable (its whole offer was 3
    identifiers over 6.5 MB before this form) at the price of a decimal in prose being counted as
    one. Stated here rather than hidden: for the REPORT it inflates the count, and for P19/B3's
    gate it can turn the guard on in a base that carries decimals and no real identifiers — where
    the only proposals it can then refuse are ones naming a cost line by a word from the prose,
    which is what the gate is for."""
    assert grounding_offer(_project(), None, Grounding.of("12.1 og 52.11")).identifiers == 2
    assert grounding_offer(_project(), None, Grounding.of("42.5")).identifiers == 1


# ----------------------------------------------- (c) measured on the SAME text the gate will see


def test_the_offer_is_measured_on_the_text_the_gate_will_see() -> None:
    """LOAD-BEARING (c) — requirement (2). The offer composes through ``_grounding_text``, the one
    composer P7's gate uses, so the report and the gate cannot describe different texts. Both of
    the composer's OTHER two sources are exercised: a project cost line and a baseline code each
    raise the count, which a report built from ``delivered`` alone cannot do."""
    delivered = Grounding.of("nothing citable here")
    project, baseline = _project("PRJ-77"), _baseline("BAS-88")

    offer = grounding_offer(project, baseline, delivered)

    assert offer.chars == len(_grounding_text(project, baseline, delivered).text)
    assert offer.identifiers == 2, offer
    assert offer.cost_lines == 1, offer


# ---------------------------------------------------------- (e) ONE renderer, omission when able


def test_the_notice_speaks_on_a_null_offer_and_is_silent_when_anchored() -> None:
    """LOAD-BEARING (e). Silent when the run CAN anchor a cost line (omission, never an empty row);
    speaking when it cannot, and carrying BOTH numbers — "50 identifiers, 0 cost lines" is the
    diagnosis, and neither number alone says it."""
    assert grounding_offer_notice(GroundingOffer(chars=9, identifiers=3, cost_lines=1)) is None
    assert grounding_offer_notice(None) is None

    line = grounding_offer_notice(GroundingOffer(chars=9, identifiers=3, cost_lines=0))
    assert line is not None
    assert "3" in line and "0" in line


# --------------------------------------- (d) the offer reaches BOTH surfaces the operator reads


async def test_the_dry_run_carries_the_offer_before_any_model_call() -> None:
    """LOAD-BEARING (d), and the proof of "BEFORE it spends its three attempts".

    Asserted on CALLS, never on client CONSTRUCTION: ``fresh_workflow`` builds the proposer and
    checker clients EAGERLY, above the dry-run cut (``workflow.py:64``), so a factory that raised
    would be red against a working implementation. An empty sink is the measurement — session 57's
    rule that a refusal after the spend is indistinguishable from one before it at the exit code.
    """
    sink: list[str] = []

    report = await run_project(
        _UNANCHORED_PID,
        "local",
        docs_dir=str(UNANCHORED),
        bundle_dir=str(UNANCHORED),
        client_factory=scripted_factory({"proposer": "x", "checker": "x"}, sink),
        live_dry_run=True,
    )

    assert sink == [], "the offer was measured only after a model call was made"

    offer = getattr(report, "grounding_offer", None)
    assert offer is not None, "the dry run says nothing about what its input can ground"
    assert offer.cost_lines == 0, offer
    assert offer.chars > 0, offer


async def test_the_full_run_carries_the_offer() -> None:
    """LOAD-BEARING (d), the other surface — requirement (3). A measurement that never leaves
    ``run_project`` is a log line, not a report."""
    result = await run_project(
        _UNANCHORED_PID,
        "local",
        docs_dir=str(UNANCHORED),
        bundle_dir=str(UNANCHORED),
        verdict_input=_VERDICT_INPUT,
        client_factory=scripted_factory({"proposer": _VALID_REPLY, "checker": _CHECKER_REPLY}, []),
    )

    offer = getattr(result, "grounding_offer", None)
    assert offer is not None, "the run says nothing about what its input can ground"
    assert offer.cost_lines == 0, offer


async def test_an_anchored_run_reports_its_cost_lines() -> None:
    """LOAD-BEARING (d), the CONTROL that ``cost_lines`` is not a constant zero: the anchored base
    ships exactly one line, and the run reports it."""
    report = await run_project(
        "VEGLYS-FV-SOER",
        "local",
        docs_dir=str(ANCHORED),
        bundle_dir=str(ANCHORED),
        client_factory=scripted_factory({"proposer": "x", "checker": "x"}, []),
        live_dry_run=True,
    )

    offer = getattr(report, "grounding_offer", None)
    assert offer is not None and offer.cost_lines == 1, offer


# ------------------------------------- (f) an exhausted run leaves the INPUT-side diagnosis behind


async def test_a_run_exhausted_on_ungrounded_identifiers_says_the_input_was_the_problem() -> None:
    """LOAD-BEARING (f). P7's gate refuses every attempt, the loop returns its last ``Rejection``
    (``generate.py``: ``last_ruling`` after the attempt loop — it does not crash), and the outcome
    the operator reads carries the input-side fact as well: this input could anchor NOTHING, so no
    attempt could ever have succeeded. Without it the record says only that the model missed."""
    result = await run_project(
        _UNANCHORED_PID,
        "local",
        docs_dir=str(UNANCHORED),
        bundle_dir=str(UNANCHORED),
        verdict_input=_VERDICT_INPUT,
        client_factory=scripted_factory(
            {"proposer": _UNGROUNDED_REPLY, "checker": _CHECKER_REPLY}, []
        ),
    )

    assert isinstance(result.outcome, Rejection)
    assert "M-04-01" in result.outcome.reason
    offer = getattr(result, "grounding_offer", None)
    assert offer is not None and offer.cost_lines == 0, offer
    assert grounding_offer_notice(offer) is not None


# ------------------------------------------------ (d) the CLI prints it, on BOTH free and paid


def test_the_cli_dry_run_prints_the_offer(capsys) -> None:
    """LOAD-BEARING (d), stdout. A renderer that returns the line while no caller prints it is a
    measurement the operator never sees — its own seam, so its own arm (the ``cost_baseline_notice``
    precedent, whose CLI print carries a mutation of its own)."""
    rc = run_mod.main(
        [
            _UNANCHORED_PID,
            "--docs-dir",
            str(UNANCHORED),
            "--bundle-dir",
            str(UNANCHORED),
            "--live-dry-run",
        ]
    )
    assert rc == 0
    assert "Grounding offer" in capsys.readouterr().out


def test_the_cli_says_nothing_when_the_run_can_anchor(capsys) -> None:
    """CONTROL for the omission arm on the SAME surface: the anchored base prints no offer line at
    all. Without it, a notice that always fired would pass the arm above."""
    rc = run_mod.main(
        [
            "VEGLYS-FV-SOER",
            "--docs-dir",
            str(ANCHORED),
            "--bundle-dir",
            str(ANCHORED),
            "--live-dry-run",
        ]
    )
    assert rc == 0
    assert "Grounding offer" not in capsys.readouterr().out


def test_the_cli_full_run_prints_the_offer(tmp_path: Path, capsys) -> None:
    """LOAD-BEARING (d), the paid surface's stdout — so the line is a property of a RUN and not of
    the dry-run branch alone."""
    replies = tmp_path / "replies.json"
    replies.write_text(
        json.dumps({"proposer": _VALID_REPLY, "checker": _CHECKER_REPLY}), encoding="utf-8"
    )
    rc = run_mod.main(
        [
            _UNANCHORED_PID,
            "--docs-dir",
            str(UNANCHORED),
            "--bundle-dir",
            str(UNANCHORED),
            "--scripted-replies",
            str(replies),
            "--decision",
            "approved",
            "--rationale",
            "expert reviewed (test)",
        ]
    )
    assert rc == 0
    assert "Grounding offer" in capsys.readouterr().out