"""P19 DEL C + DEL D — the trace says HOW, and a run says what it spent and why it stopped.

**DEL C, the measured silence.** P18 gave ``read_dir`` a window — ``filter`` / ``offset`` /
``limit`` — and then measured its own paid round without being able to see it used: five of 31
documents read lay OUTSIDE the default window, so the window had been widened, and the trace could
not say with which knob (``docs/2026-09-14-p18-stressrunde-2.md`` § 1, finding 1). The recorder
kept ``name`` / ``bundle_id`` / ``path`` and nothing else. "Did the model narrow the level, or page
through it?" is the operative question about a corpus of 2 756 documents, and it was unanswerable
from the artefact the run leaves behind.

**DEL D, and one of the two findings it fixes was WRONG AS WRITTEN.** P18's finding 4 said a
successful run does not say what it used. Measured 14.09: ``provenance.token_usage`` has been
stamped on every proposal artefact since S3.4 and stands in every one of round 2's. What was
missing is a JUDGE that reads it — so the report's sentence is corrected in its own § 7 addendum
rather than the field being invented a second time. What was genuinely absent is the OTHER half:
``settle`` prints the coverage report, ``ApproachOutcome`` has carried ``not_evaluated`` since
Trekk A3, and neither ever reached a file. A judge reading an outbox could see that an approach had
no artefact and could not tell a budget stop from an approach nobody ordered — the silence
``ApproachOutcome`` exists to remove, one layer out.

What each arm pins:

(a) C — the three window arguments are RECORDED, in the shape the wire actually carries;
(b) C — a call that passes none of them yields empty/zero fields, never a refusal and never an
    absent key: "not narrowed" and "we did not look" must not read the same;
(c) C — a numeric argument sent as a STRING is coerced. A model may send either, and a recorder
    that read only one shape would report a paged call as unpaged;
(d) C — the judge counts them, so "did the model use the filter" is readable directly rather than
    inferred from which documents happened to lie outside a default window;
(e) D2 — ``{run_id}-coverage.json`` is written IFF a mandate was given, INCLUDING when a cap cut
    the run short before a single approach was evaluated. A mandate-less run leaves the outbox
    byte-identical, which two older tests pin as an exact listing;
(f) D2 — the stop reason is ``BudgetExceeded.kind``, carried as a field rather than inferred, and
    the judge turns it into each unevaluated row's ``not_evaluated_reason``;
(g) D1 — the judge reads ``provenance.token_usage`` and reports it, with ``absent`` distinguishing
    a run that wrote no coverage file (every run before today) from one that finished cleanly.
"""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any

import pytest
from agent_framework import BaseChatClient
from conftest import SyntheticUsageChatClient

from portfolio_optimiser import explore as ex
from portfolio_optimiser import outbox, stress
from portfolio_optimiser.budget import Budget, TokenMeter
from portfolio_optimiser.mandate import Approach, Mandate
from portfolio_optimiser.run import run_project

_BUNDLE_DIR = Path(__file__).resolve().parents[1] / "shared" / "examples" / "bygg-energi-mikro"
_PID = "BYGG-KONTOR-NORD"
_PROPOSER = (
    '{"measure":"LED-retrofit av kontorbelysning","affected_items":'
    '[{"code":"ENERGI-TOTAL-EL","quantity":300000,"unit_cost":1.0}],"claimed_saving_nok":30000}'
)
_CHECKER = "Supported by the cited documents. VERDICT: APPROVE"


@pytest.fixture(autouse=True)
def _isolate_model_env(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.delenv("PORTFOLIO_MODEL_MAP", raising=False)
    monkeypatch.delenv("PORTFOLIO_FOUNDRY_PROJECT_ENDPOINT", raising=False)


def _factory(role: str) -> BaseChatClient:
    return SyntheticUsageChatClient(default_reply=_CHECKER if role == "checker" else _PROPOSER)


class _Fn:
    def __init__(self, name: str) -> None:
        self.name = name


class _Ctx:
    def __init__(self, name: str, arguments: Any) -> None:
        self.function = _Fn(name)
        self.arguments = arguments


def _record(*calls: tuple[str, Any]) -> list[ex.ToolCall]:
    import asyncio

    sink: list[ex.ToolCall] = []
    recorder = ex.ExplorationToolRecorder(sink)

    async def _noop() -> None:
        return None

    for name, args in calls:
        asyncio.run(recorder.process(_Ctx(name, args), _noop))  # type: ignore[arg-type]
    return sink


# ---------------------------------------------------------------------------------------------
# (a)-(d) DEL C
# ---------------------------------------------------------------------------------------------


def test_the_window_arguments_are_recorded() -> None:
    """(a) HOW the level was asked for, not only which one."""
    (call,) = _record(
        ("read_dir", {"bundle_id": "k2", "path": "krav/N100", "filter": "rundkjoring", "limit": 25})
    )
    assert (call.filter, call.offset, call.limit) == ("rundkjoring", 0, 25)


def test_a_call_that_passes_none_of_them_yields_empty_fields() -> None:
    """(b) Never a refusal, never an absent key — the ``path``/``bundle_id`` rule one field over."""
    (call,) = _record(("list_bundles", {}))
    assert (call.filter, call.offset, call.limit) == ("", 0, 0)
    payload = ex.tool_call_payload([call])
    assert payload[0]["filter"] == "" and payload[0]["offset"] == 0 and payload[0]["limit"] == 0


def test_a_numeric_argument_sent_as_a_string_is_coerced() -> None:
    """(c) A model may send either shape; a recorder that read one would misreport the other."""
    (call,) = _record(("read_dir", {"bundle_id": "k2", "path": "p", "offset": "30", "limit": "10"}))
    assert (call.offset, call.limit) == (30, 10)
    # …and a value that is neither is 0, never an invented number.
    (other,) = _record(("read_dir", {"bundle_id": "k2", "path": "p", "limit": True}))
    assert other.limit == 0


# ---------------------------------------------------------------------------------------------
# a synthetic base + outbox, self-contained (nothing here touches a real bundle or a model)
# ---------------------------------------------------------------------------------------------

_GOOD = "krav/N1/id-good.md"


def _minibase(root: Path) -> Path:
    base = root / "minibase"
    (base / "krav" / "N1").mkdir(parents=True)
    (base / "index.md").write_text(
        "---\nbundle_id: minibase\n---\n\n- [good](krav/N1/id-good.md)\n", encoding="utf-8"
    )
    (base / _GOOD).write_text(
        '---\ntype: concept\ntitle: "T"\nreq_number: "Krav 1.2.3-4"\n---\n\nBody.\n',
        encoding="utf-8",
    )
    return base


def _context_dir(root: Path) -> Path:
    ctx = root / "ctx"
    (ctx / "docs").mkdir(parents=True)
    (ctx / "bundle.txt").write_text("name: minibase\nbundle_id: minibase\n", encoding="utf-8")
    (ctx / "mandate.json").write_text(
        json.dumps(
            {
                "objective": "o",
                "success_criteria": "s",
                "approaches": [
                    {"id": "a1", "label": "L", "affected_codes": ["CODE-1"]},
                    {"id": "a2", "label": "M", "affected_codes": ["CODE-2"]},
                ],
            }
        ),
        encoding="utf-8",
    )
    (ctx / "fasit.json").write_text(
        json.dumps(
            {
                "project_id": "proj",
                "bundle": "minibase",
                "bundle_id": "minibase",
                "must_cite": [
                    {
                        "approach_id": "a1",
                        "rationale": "why",
                        "concepts": [{"path": _GOOD, "title": "T", "ref": "Krav 1.2.3-4"}],
                    }
                ],
                "must_refuse": [],
                "honesty": "synthetic",
            }
        ),
        encoding="utf-8",
    )
    return ctx


def _outbox(root: Path, *, tokens: int, tool_calls: list[dict[str, Any]]) -> Path:
    out = root / "out"
    out.mkdir(parents=True, exist_ok=True)
    (out / "r1-a1-proposal.json").write_text(
        json.dumps(
            {
                "proposal": {
                    "project_id": "proj",
                    "measure": "m",
                    "affected_items": [{"code": "CODE-1", "quantity": 1.0, "unit_cost": 2.0}],
                    "claimed_saving_nok": 1.0,
                    "assumptions": {},
                },
                "provenance": {"citations": [], "token_usage": tokens},
            }
        ),
        encoding="utf-8",
    )
    (out / "r1-a1-outcome.json").write_text(
        json.dumps({"outcome_type": "rejected", "reason": "no"}), encoding="utf-8"
    )
    (out / "r1-debate.json").write_text(
        json.dumps({"run_id": "r1", "tool_calls": tool_calls}), encoding="utf-8"
    )
    return out


def test_the_judge_counts_filtered_and_paged_calls(tmp_path: Path) -> None:
    """(d) Readable directly, instead of inferred from which documents fell outside a default."""
    calls = [
        {
            "name": "read_dir",
            "bundle_id": "b",
            "path": "p",
            "filter": "rund",
            "offset": 0,
            "limit": 0,
        },
        {"name": "read_dir", "bundle_id": "b", "path": "p", "filter": "", "offset": 30, "limit": 0},
        {
            "name": "read_file",
            "bundle_id": "b",
            "path": _GOOD,
            "filter": "",
            "offset": 0,
            "limit": 0,
        },
    ]
    verdict = stress.score_context_set(
        _context_dir(tmp_path),
        _outbox(tmp_path, tokens=1234, tool_calls=calls),
        "r1",
        _minibase(tmp_path),
    )
    assert (verdict.filter_calls, verdict.paged_calls) == (1, 1)
    assert verdict.tool_calls_seen == 3


# ---------------------------------------------------------------------------------------------
# (e)-(g) DEL D
# ---------------------------------------------------------------------------------------------


def test_the_coverage_artefact_carries_the_rows_and_the_stop_reason(tmp_path: Path) -> None:
    """(e)/(f) A required stop reason, never an inferred one: "finished" and "we never found out"
    must not be the same value."""
    outbox.write_coverage(
        str(tmp_path),
        "r1",
        rows=[
            {"id": "a1", "label": "L", "status": "validated", "detail": "", "saving_nok": 10.0},
            {
                "id": "a2",
                "label": "M",
                "status": "not_evaluated",
                "detail": "budget",
                "saving_nok": None,
            },
        ],
        stop_reason="tokens",
    )
    payload = json.loads((tmp_path / "r1-coverage.json").read_text(encoding="utf-8"))
    assert payload["stop_reason"] == "tokens"
    assert [r["status"] for r in payload["rows"]] == ["validated", "not_evaluated"]
    # Byte-deterministic: the same inputs twice produce the same file (write_run_config's rule).
    first = (tmp_path / "r1-coverage.json").read_bytes()
    outbox.write_coverage(
        str(tmp_path),
        "r1",
        rows=[
            {"id": "a1", "label": "L", "status": "validated", "detail": "", "saving_nok": 10.0},
            {
                "id": "a2",
                "label": "M",
                "status": "not_evaluated",
                "detail": "budget",
                "saving_nok": None,
            },
        ],
        stop_reason="tokens",
    )
    assert (tmp_path / "r1-coverage.json").read_bytes() == first


def test_the_judge_reads_the_stop_reason_onto_every_unevaluated_row(tmp_path: Path) -> None:
    """(f) The second half: a row with no artefact says WHY, instead of leaving a reader to guess."""
    ctx = _context_dir(tmp_path)
    out = _outbox(tmp_path, tokens=45_642, tool_calls=[])
    base = _minibase(tmp_path)

    # Before any coverage file exists — every run written before today.
    blind = stress.score_context_set(ctx, out, "r1", base)
    assert blind.stop_reason == "absent"
    assert [r.not_evaluated_reason for r in blind.approaches] == ["", "absent"]

    outbox.write_coverage(
        str(out),
        "r1",
        rows=[
            {"id": "a2", "label": "M", "status": "not_evaluated", "detail": "b", "saving_nok": None}
        ],
        stop_reason="rounds",
    )
    informed = stress.score_context_set(ctx, out, "r1", base)
    assert informed.stop_reason == "rounds"
    assert [r.not_evaluated_reason for r in informed.approaches] == ["", "rounds"]


def test_the_judge_reports_what_the_run_spent(tmp_path: Path) -> None:
    """(g) D1. P18's finding 4 was wrong as written: the field was always there, the READER was not.

    The figure is the one measured on round 2's own artefacts (tunnel-hauglia-2027-02).
    """
    verdict = stress.score_context_set(
        _context_dir(tmp_path),
        _outbox(tmp_path, tokens=45_642, tool_calls=[]),
        "r1",
        _minibase(tmp_path),
    )
    assert verdict.token_usage == 45_642


# ---------------------------------------------------------------------------------------------
# (e) the run itself writes it -- without this arm the wiring has no witness
# ---------------------------------------------------------------------------------------------


async def test_a_commissioned_run_writes_the_coverage_artefact(tmp_path: Path) -> None:
    """(e) END-TO-END. The arm above drives ``write_coverage`` directly and would stay green with
    the ``run_project`` wiring detached -- the vacuous-gate shape this repo has now met two dozen
    times. This one runs the real pipeline."""
    out = tmp_path / "with-mandate"
    await run_project(
        _PID,
        "local",
        docs_dir=str(_BUNDLE_DIR),
        bundle_dir=str(_BUNDLE_DIR),
        client_factory=_factory,
        max_rounds=2,
        outbox_dir=str(out),
        run_id="r1",
        mandate=Mandate(
            objective="o",
            approaches=(Approach(id="a1", label="LED", description="swap the fittings"),),
            allow_own_proposals=False,
        ),
    )
    payload = json.loads((out / "r1-coverage.json").read_text(encoding="utf-8"))
    assert payload["stop_reason"] == "", "nothing cut this run short"
    assert [r["id"] for r in payload["rows"]] == ["a1"]
    assert payload["rows"][0]["status"] in {"validated", "rejected"}


async def test_a_mandateless_run_leaves_the_outbox_byte_identical(tmp_path: Path) -> None:
    """(e), the other half. Coverage is the MANDATE's report; a run without one would be described
    by a file saying nothing, and two older tests pin an exact listing on such a run."""
    out = tmp_path / "no-mandate"
    await run_project(
        _PID,
        "local",
        docs_dir=str(_BUNDLE_DIR),
        bundle_dir=str(_BUNDLE_DIR),
        client_factory=_factory,
        max_rounds=2,
        outbox_dir=str(out),
        run_id="r1",
    )
    assert not (out / "r1-coverage.json").exists()


async def test_a_cap_that_cuts_the_run_short_is_named_in_the_artefact(tmp_path: Path) -> None:
    """(f) END-TO-END, and this arm exists because the direct one was VACUOUS.

    MEASURED: mutation D-i — ``stop_reason=""`` whatever happened — left the WHOLE suite green
    (1743/5), because the arm above calls ``write_coverage`` itself and therefore chooses the
    reason it then asserts. Only a run that a cap actually cut short can tell the two apart, and
    it is exactly the run for which the artefact matters: a commission that stopped halfway.
    """
    out = tmp_path / "capped"
    await run_project(
        _PID,
        "local",
        docs_dir=str(_BUNDLE_DIR),
        bundle_dir=str(_BUNDLE_DIR),
        client_factory=_factory,
        max_rounds=2,
        outbox_dir=str(out),
        run_id="r1",
        # tick_round fires once per generation ATTEMPT: one round pays for the first
        # approach, the second is the one the cap cuts.
        meter=TokenMeter(Budget(max_tokens=10_000_000, max_rounds=1)),
        mandate=Mandate(
            objective="o",
            approaches=(
                Approach(id="a1", label="LED", description="one"),
                Approach(id="a2", label="Sensors", description="two"),
            ),
            allow_own_proposals=False,
        ),
    )
    payload = json.loads((out / "r1-coverage.json").read_text(encoding="utf-8"))
    assert payload["stop_reason"] == "rounds", payload
    assert [r["status"] for r in payload["rows"]][-1] == "not_evaluated", payload