"""``ResearchAPI.poll`` and ``import_sources`` task-id discriminator.

Regression test for the cross-wire bug: when two research tasks are in
flight against the same notebook (e.g. an end-user kicks off a deep-research
task A and a follow-up task B before A completes), the legacy
``ResearchAPI.poll`` API has no way to tell callers *which* task a returned
payload describes — ``poll(notebook_id)`` silently returns the *latest*
task, so a caller that started task A may unknowingly act on results for
task B (the "cross-wire" bug).

The fix adds an OPTIONAL ``task_id`` discriminator to ``poll()`` and a
per-source ``research_task_id`` mismatch guard to ``import_sources()``.
Optional, not required: the signature stays unchanged so single-task callers
keep working. When ``task_id`` is None and a single task is in flight, the only
task is returned silently; when two or more are in flight, the call raises
:class:`AmbiguousResearchTaskError` (v0.8.0, #1363) rather than guessing.

Four scenarios:

A. **Explicit discriminator**: ``poll(nb, task_id="A")`` returns task A
   even when task B is also in flight; ``poll(nb, task_id="B")`` returns
   task B. No warning fires.
B. **Single in-flight, no discriminator**: ``poll(nb)`` returns the only
   task without any deprecation warning (no ambiguity).
C. **Multiple in-flight, no discriminator**: ``poll(nb)`` raises
   :class:`AmbiguousResearchTaskError` (v0.8.0, #1363) instead of silently
   guessing the latest task — the caller must pass an explicit ``task_id``.
D. **import_sources mismatch**: passing ``task_id="A"`` together with a
   source whose ``research_task_id="B"`` raises
   :class:`ResearchTaskMismatchError` instead of silently importing
   under the wrong task.

These tests do not exercise the network — they assert on parsing /
filtering / warning semantics, which is the layer where the cross-wire
bug lives.
"""

from __future__ import annotations

import warnings

import pytest

from notebooklm import NotebookLMClient
from notebooklm.exceptions import AmbiguousResearchTaskError, ResearchTaskMismatchError
from notebooklm.rpc import RPCMethod

# Mock-only tests (no real HTTP, no cassette) — opt out of the
# integration-tree enforcement hook in ``tests/integration/conftest.py``.
pytestmark = pytest.mark.allow_no_vcr


def _build_completed_task_payload(query: str, source_url: str, source_title: str) -> list:
    """Build a single ``POLL_RESEARCH`` task_info entry for a completed task.

    Status code ``2`` = completed (non-deep-research). Sources are encoded
    in the fast-research shape so ``research_task_id`` propagates onto
    each parsed source dict.
    """
    sources = [[source_url, source_title, "desc", 1]]
    return [None, [query, 1], 1, [sources, f"{query} summary"], 2]


@pytest.mark.asyncio
async def test_scenario_a_explicit_task_id_returns_matching_task(
    auth_tokens, httpx_mock, build_rpc_response
):
    """A. ``poll(nb, task_id="A")`` returns task A; ``task_id="B"`` returns task B.

    Two completed tasks are in flight on the same notebook. The optional
    discriminator filters down to the requested task. No warning is
    emitted in either case — the caller asked for an explicit task by id,
    so there is no ambiguity to surface.
    """
    task_a_payload = _build_completed_task_payload("query A", "https://a.example", "Result A")
    task_b_payload = _build_completed_task_payload("query B", "https://b.example", "Result B")
    # Two tasks in the response — ``poll`` currently returns the first
    # ("latest") on missing discriminator. ``task_id`` should pick either.
    response_body = build_rpc_response(
        RPCMethod.POLL_RESEARCH,
        [[["task_A", task_a_payload], ["task_B", task_b_payload]]],
    )

    httpx_mock.add_response(content=response_body.encode(), method="POST")
    async with NotebookLMClient(auth_tokens) as client:
        with warnings.catch_warnings():
            warnings.simplefilter("error", DeprecationWarning)
            result_a = await client.research.poll("nb_xwire", task_id="task_A")

    assert result_a.task_id == "task_A"
    assert result_a.query == "query A"
    # The ``tasks`` list should reflect the filtered view — only the
    # matched task remains, otherwise downstream callers iterating
    # ``tasks`` would still see the un-asked-for sibling.
    assert [t.task_id for t in result_a.tasks] == ["task_A"]
    assert result_a.sources[0].research_task_id == "task_A"

    # Fresh response for the second call — httpx_mock is per-request FIFO.
    httpx_mock.add_response(content=response_body.encode(), method="POST")
    async with NotebookLMClient(auth_tokens) as client:
        with warnings.catch_warnings():
            warnings.simplefilter("error", DeprecationWarning)
            result_b = await client.research.poll("nb_xwire", task_id="task_B")

    assert result_b.task_id == "task_B"
    assert result_b.query == "query B"
    assert [t.task_id for t in result_b.tasks] == ["task_B"]
    assert result_b.sources[0].research_task_id == "task_B"


@pytest.mark.asyncio
async def test_scenario_b_no_task_id_single_in_flight_no_warning(
    auth_tokens, httpx_mock, build_rpc_response
):
    """B. ``poll(nb)`` with a single in-flight task: old behavior, no warning.

    The deprecation warning fires only on the actually-broken case
    (ambiguous + missing discriminator). When only one task is in flight,
    there is nothing to disambiguate — surfacing a warning every poll
    would be noise for the dominant legacy usage pattern.
    """
    task_payload = _build_completed_task_payload("solo query", "https://solo.example", "Solo")
    response_body = build_rpc_response(
        RPCMethod.POLL_RESEARCH,
        [[["task_solo", task_payload]]],
    )

    httpx_mock.add_response(content=response_body.encode(), method="POST")
    async with NotebookLMClient(auth_tokens) as client:
        with warnings.catch_warnings(record=True) as caught:
            warnings.simplefilter("always")
            result = await client.research.poll("nb_solo")

    assert result.task_id == "task_solo"
    assert result.query == "solo query"
    # No deprecation warning — single in-flight task is unambiguous.
    deprecation_warnings = [w for w in caught if issubclass(w.category, DeprecationWarning)]
    assert deprecation_warnings == [], (
        f"Expected no DeprecationWarning on single-in-flight poll, got: "
        f"{[str(w.message) for w in deprecation_warnings]}"
    )


@pytest.mark.asyncio
async def test_scenario_c_no_task_id_multiple_in_flight_raises(
    auth_tokens, httpx_mock, build_rpc_response
):
    """C. ``poll(nb)`` with multiple in-flight tasks: raises (v0.8.0; #1363).

    The actually-broken case (cross-wire). In v0.8.0 this no longer warns and
    silently guesses the latest task — it raises
    :class:`AmbiguousResearchTaskError` so the caller must pass an explicit
    ``task_id`` discriminator rather than risk acting on the wrong task's
    results.
    """
    task_a = _build_completed_task_payload("query A", "https://a.example", "Result A")
    task_b = _build_completed_task_payload("query B", "https://b.example", "Result B")
    response_body = build_rpc_response(
        RPCMethod.POLL_RESEARCH,
        [[["task_A", task_a], ["task_B", task_b]]],
    )

    httpx_mock.add_response(content=response_body.encode(), method="POST")
    async with NotebookLMClient(auth_tokens) as client:
        with pytest.raises(AmbiguousResearchTaskError) as excinfo:
            await client.research.poll("nb_ambig")

    err = excinfo.value
    assert err.notebook_id == "nb_ambig"
    assert err.task_ids == ["task_A", "task_B"]
    # The error must steer the caller toward the task_id discriminator.
    assert "task_id" in str(err)


@pytest.mark.asyncio
async def test_scenario_d_import_sources_mismatched_research_task_id_raises(auth_tokens):
    """D. ``import_sources(task_id="A", sources=[{research_task_id="B", ...}])`` raises.

    Per-source ``research_task_id`` (set by ``poll``) is now validated
    against the caller-supplied ``task_id`` for ``import_sources``. A
    mismatch is the wire-crossing bug — importing sources that were
    discovered for task B under task A would mis-attribute provenance.
    The new :class:`ResearchTaskMismatchError` makes this loud rather
    than silent.

    No RPC call is made: validation happens before the network.
    """
    async with NotebookLMClient(auth_tokens) as client:
        sources = [
            {
                "url": "https://a.example",
                "title": "Result A",
                "result_type": 1,
                "research_task_id": "task_B",  # mismatch — discovered under B
            },
        ]
        with pytest.raises(ResearchTaskMismatchError) as exc_info:
            await client.research.import_sources(
                notebook_id="nb_xwire",
                task_id="task_A",
                sources=sources,
            )

    err = exc_info.value
    # Diagnostic attributes — make it actionable in caller logs.
    assert err.task_id == "task_A"
    assert err.source_research_task_id == "task_B"