"""Value-report seam in run.py — LOAD-BEARING (S5.4-analog; §11; paritetsrad 25; K11).

The seam this file keeps alive: the deliverable entrance can produce the value
report as an OPT-IN side product of a run, projecting the layers that are on
disk when the run finishes — including the outbox pair the run itself just
filed. The report is a projection, never a second source of truth, so it can
neither change the run's verdict nor be produced without an outbox to project.

Detach proofs:

* Report wired: an opted-in run writes the JSON, and it carries THIS run's
  proposal as modelled value. Detach point: drop the ``write_value_report`` call
  in ``main`` → no file → ``test_run_writes_the_value_report`` RED.
* Opt-in requires an outbox, refused BEFORE any spend: ``--value-report`` without
  ``--outbox`` exits via ``parser.error`` and the scripted client is never
  constructed. Detach point: remove the fail-fast → the run spends and only then
  discovers it has nothing to project → ``test_value_report_without_outbox_
  refuses_before_any_spend`` RED.
* Both outcomes: a budget-stopped run still writes the report AND still exits 3.
  Detach point: produce the report only on success, or let a report failure
  overwrite the run's exit code → ``test_budget_stop_still_reports_and_keeps_
  exit_code`` RED.
"""

from __future__ import annotations

import json
from pathlib import Path

import pytest
from _scripted import ScriptedClient, reply

from portfolio_optimiser_claude.contracts import Contracts
from portfolio_optimiser_claude.ir import load_validator_input
from portfolio_optimiser_claude.loop import ModelClient
from portfolio_optimiser_claude.run import main as run_main

BUNDLE = Path(__file__).resolve().parents[1] / "shared" / "examples" / "bygg-energi-mikro"


def _scripted_factory(replies: list[object]) -> tuple[object, list[ScriptedClient]]:
    created: list[ScriptedClient] = []

    def factory(contracts: Contracts, max_budget_usd_per_call: float) -> ModelClient:
        client = ScriptedClient(replies=list(replies))  # type: ignore[arg-type]
        created.append(client)
        return client

    return factory, created


def _happy_replies() -> list[object]:
    return [
        reply("debate reasoning"),
        reply("VERDICT: APPROVE"),
        reply(json.dumps(load_validator_input(BUNDLE).model_dump())),
    ]


def _run_args(tmp_path: Path, *extra: str) -> list[str]:
    return [
        "--bundle",
        str(BUNDLE),
        "--out",
        str(tmp_path / "out"),
        "--outbox",
        str(tmp_path / "outbox"),
        "--run-id",
        "r-001",
        *extra,
    ]


def test_run_writes_the_value_report(tmp_path: Path) -> None:
    """LOAD-BEARING (report wired): the run's own pair shows up as modelled value."""
    destination = tmp_path / "reports" / "value.json"
    factory, _ = _scripted_factory(_happy_replies())

    code = run_main(_run_args(tmp_path, "--value-report", str(destination)), client_factory=factory)

    assert code == 0
    payload = json.loads(destination.read_text(encoding="utf-8"))
    assert payload["n_proposals"] == 1
    assert payload["modelled_nok"] == load_validator_input(BUNDLE).claimed_saving_nok
    # No inbox, no ledger → the expert stages are UNMARKED, never mirrored from modelled.
    assert payload["expert_corrected_nok"] is None
    assert payload["n_pending"] == 1
    assert payload["projects"][0]["realized_nok"] is None


def test_value_report_without_outbox_refuses_before_any_spend(tmp_path: Path) -> None:
    """LOAD-BEARING (fail-fast): nothing to project → refuse BEFORE constructing a client."""
    factory, created = _scripted_factory(_happy_replies())

    with pytest.raises(SystemExit):
        run_main(
            [
                "--bundle",
                str(BUNDLE),
                "--out",
                str(tmp_path / "out"),
                "--value-report",
                str(tmp_path / "value.json"),
            ],
            client_factory=factory,
        )

    assert created == []  # refused before the client existed → no spend
    assert not (tmp_path / "value.json").exists()


def test_budget_stop_still_reports_and_keeps_exit_code(tmp_path: Path) -> None:
    """LOAD-BEARING (both outcomes): a stop is still reported, and stays exit 3."""
    destination = tmp_path / "value.json"
    factory, _ = _scripted_factory([reply("debate reasoning", usage_tokens=10)])

    code = run_main(
        _run_args(tmp_path, "--max-tokens", "5", "--value-report", str(destination)),
        client_factory=factory,
    )

    assert code == 3  # the run's own verdict is untouched by reporting
    payload = json.loads(destination.read_text(encoding="utf-8"))
    assert payload["n_proposals"] == 0  # a stop files no pair — an honest empty picture


def test_report_failure_never_rewrites_a_budget_stop(tmp_path: Path) -> None:
    """A malformed ledger fails the report, but a budget stop still reports as a stop."""
    broken_ledger = tmp_path / "ledger.json"
    broken_ledger.write_text('{"entries": {}}', encoding="utf-8")
    factory, _ = _scripted_factory([reply("debate reasoning", usage_tokens=10)])

    code = run_main(
        _run_args(
            tmp_path,
            "--max-tokens",
            "5",
            "--value-report",
            str(tmp_path / "value.json"),
            "--ledger",
            str(broken_ledger),
        ),
        client_factory=factory,
    )

    assert code == 3  # NOT rewritten to 1 — the budget stop is the bigger news
    assert not (tmp_path / "value.json").exists()


def test_report_failure_fails_an_otherwise_clean_run(tmp_path: Path) -> None:
    """The operator asked for a report and did not get one → the command is non-zero."""
    broken_ledger = tmp_path / "ledger.json"
    broken_ledger.write_text("[]", encoding="utf-8")
    factory, _ = _scripted_factory(_happy_replies())

    code = run_main(
        _run_args(
            tmp_path, "--value-report", str(tmp_path / "value.json"), "--ledger", str(broken_ledger)
        ),
        client_factory=factory,
    )

    assert code == 1
    assert (tmp_path / "outbox" / "r-001-proposal.json").exists()  # the run itself still landed