"""LintQ detector stub -- auto-scaffolded from research note.

Generated by detector_stub_cron.py for cluster 36
(label: Cirq:concurrency).

Source note (#23): PATTERN: Concurrency/executor bugs -- argument unpacking and map() over single-argument callables, type errors under parallel executors. 1 issue(s) across: Cirq. Sample: Open GitHub issue #6531 in quantumlib/Cirq reported by @NoureldinYosr…
"""

from __future__ import annotations

from typing import Dict, List


class DetectorConcurrency:
    """Detect the 'concurrency' anti-pattern reported against Cirq.

    STATUS: STUB. This class was scaffolded automatically from a real issue
    cluster in lintq_research.db. Fill in ``detect`` with the logic below and
    add it to the engine rule set.

    TODO -- implement the detection:
        PATTERN: Concurrency/executor bugs -- argument unpacking and map() over single-argument callables, type errors under parallel executors. 1 issue(s) across: Cirq. Sample: Open GitHub issue #6531 in quantumlib/Cirq reported by @NoureldinYosri: Update `cirq.RANDOM_STATE_OR_SEED_LIKE` to support `np.random.Generator`

        DETECTION LOGIC: Add a LintQ detector 'executor-arg-unpack' that inspects pennylane-style concurrent execution to flag map(f, single_arg) patterns where f takes one argument but is invoked in a per-element executor expecting an iterable, and verify callable arity matches the executor's fan-out. Catches TypeError at lint time.
    """

    id = "concurrency"
    theme = "concurrency"
    software = "Cirq"
    cluster_id = 36
    note_id = 23

    def detect(self, facts: Dict) -> List[Dict]:
        """Return a list of warning dicts for the given extracted facts.

        Args:
            facts: the 7-relation EDB fact dict produced by the extractor
                (Stmt, CFGEdge, Assign, CircuitAlloc, GateOp, MeasureOp,
                CircuitCall).

        Returns:
            A list of warning dicts, e.g.
            {"kind": "concurrency", "stmt": <id>, "qubit": <q>, "detail": <str>}.
        """
        raise NotImplementedError(
            "Detector stub -- implement 'concurrency' detection for Cirq. "
            "See the TODO block in this class for the source note's logic."
        )