"""Library-level MAF tool carriers over the framework-neutral ``okf`` readers.

One named carrier per reader whose answer a hypothesiser needs to be able to ASK for. The gate on
this module is the carrier, not the vocabulary it carries: an accessor that returns three tokens
which nothing propagates is a vocabulary, not a seam.

**Import direction is one-way and load-bearing:** this module imports ``okf``, never the reverse.
``okf`` is MAF-free by invariant (``test_okf_is_maf_free``, D7 vendor-neutrality) and this module
is not, so a back-edge would drag ``agent_framework`` into the portable context layer.

**Not the MCP seam.** ``mcp_tools`` is the opt-in EXTERNAL seam with its own allowlist and
announcement rules; a local library primitive placed there would sit behind an egress contract it
has no business in. These carriers make no network call and announce nothing.

**Deliberately NOT wired into ``run_project``.** Wiring a carrier into the run surface would move
the byte-pinned demo transcript, which nothing asks for, and would make the state reachable only by
reading a run's output rather than by calling a function — the ``evidence_for`` rule, unchanged.
"""

from __future__ import annotations

from typing import Any

from agent_framework import FunctionTool, tool

from portfolio_optimiser import okf
from portfolio_optimiser.retrieval import safe_resolve


def adjudication_payload(bundle_dir: str, concept: str) -> dict[str, Any]:
    """The carrier's answer: the concept asked about, AND the state read for it.

    Both halves are the point. A payload naming the concept without its state would leave
    ``adjudication_for`` perfectly correct and the hypothesiser none the wiser, which is exactly
    the silent gap this seam closes.

    Path-safe via ``safe_resolve`` (fail-closed), so a concept name escaping the bundle raises
    rather than reading an arbitrary file."""
    resolved = safe_resolve(bundle_dir, concept)
    return {"concept": concept, "adjudication": okf.adjudication_for(resolved)}


def make_adjudication_tool(bundle_dir: str) -> FunctionTool:
    """The ONE named carrier exposing a concept's adjudication state to a hypothesiser."""

    @tool(
        name="concept_adjudication_state",
        description=(
            "Report whether a concept in the knowledge base has been adjudicated. Returns "
            "`proposed`, `adjudicated`, or `unknown` when the concept does not say — `unknown` "
            "means the state was not learned, never that adjudication did not happen."
        ),
    )
    def concept_adjudication_state(concept: str) -> dict[str, Any]:
        return adjudication_payload(bundle_dir, concept)

    return concept_adjudication_state