"""Service-layer tests for ``cli/services/research.py``.

These tests exercise :class:`ResearchWaitPlan` + :func:`execute_research_wait`
DIRECTLY — no Click ``CliRunner``, no Rich console capture, no asyncio
``CancelledError`` rituals. The Click handler in ``cli/research_cmd.py`` is
exercised separately by ``tests/unit/cli/test_research*.py``.

The service is intentionally I/O-free: it never calls ``console.print``,
``click.echo``, or ``exit_with_code``. The Click handler owns rendering and
exit codes; the service owns wait orchestration and the optional import call.
"""

from __future__ import annotations

import contextlib
from collections.abc import AsyncIterator
from typing import Any
from unittest.mock import AsyncMock

import pytest

from notebooklm import ResearchSource, ResearchStatus, ResearchTask
from notebooklm.cli.research_import import ResearchImportResult
from notebooklm.cli.services.research import (
    ResearchWaitPlan,
    ResearchWaitResult,
    execute_research_wait,
)

# ---------------------------------------------------------------------------
# Fixtures: a fake notebook client with only the surface the service touches
# ---------------------------------------------------------------------------


# The service serializes each typed ``ResearchSource`` back to its historical
# dict via ``to_public_dict()``, which canonicalizes key order and always
# includes ``result_type``. This is the shape the service now hands to the
# importer / exposes on ``ResearchWaitResult.sources``.
_SERIALIZED_SOURCE = {"url": "http://example.com", "title": "S", "result_type": 1}


def _task(spec: Any) -> Any:
    """Convert a legacy dict spec into a typed ``ResearchTask`` side-effect.

    ``wait_for_completion`` now returns a ``ResearchTask`` (issue #1209); these
    tests keep declaring canned results as the historical dict shape and this
    helper adapts them. Non-dict side effects (e.g. exceptions) pass through.

    The typed return guarantees clean fields (the parser already coerces wire
    rows), so this helper mirrors that: unknown/terminal statuses map to
    ``FAILED`` like ``_status_from_code`` does, and non-str query/report or a
    non-list ``sources`` collapse to their typed defaults.
    """
    if not isinstance(spec, dict):
        return spec
    raw_status = spec.get("status", "no_research")
    try:
        status = ResearchStatus(raw_status)
    except ValueError:
        # Unknown non-terminal status (e.g. "cancelled") -> treated as FAILED,
        # matching the parser's _status_from_code fallback for unknown codes.
        status = ResearchStatus.FAILED
    raw_sources = spec.get("sources") or []
    sources = tuple(
        ResearchSource.from_public_dict(s)
        for s in (raw_sources if isinstance(raw_sources, list) else [])
        if isinstance(s, dict)
    )
    query = spec.get("query", "")
    report = spec.get("report", "")
    return ResearchTask(
        task_id=spec.get("task_id", ""),
        status=status,
        query=query if isinstance(query, str) else "",
        sources=sources,
        summary=spec.get("summary", ""),
        report=report if isinstance(report, str) else "",
    )


class _FakeResearchAPI:
    """Records wait calls; returns canned values."""

    def __init__(self, *, side_effect: Any) -> None:
        adapted = (
            [_task(item) for item in side_effect]
            if isinstance(side_effect, list)
            else (_task(side_effect))
        )
        self.wait_for_completion = AsyncMock(side_effect=adapted)


class _FakeClient:
    def __init__(self, *, wait_side_effect: Any) -> None:
        self.research = _FakeResearchAPI(side_effect=wait_side_effect)


async def _fake_resolve(client, notebook_id, *, json_output: bool = False) -> str:  # noqa: ARG001
    """Pass-through resolver — service should not touch ID resolution."""
    return notebook_id


@pytest.fixture
def base_plan() -> ResearchWaitPlan:
    return ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=5,
        interval=1,
    )


# ---------------------------------------------------------------------------
# Happy path
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_completed_returns_outcome_with_sources(base_plan):
    """A completed wait result is rendered into the service result."""
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI research",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "REPORT",
            }
        ]
    )

    result = await execute_research_wait(base_plan, client=client, resolve_id=_fake_resolve)

    assert isinstance(result, ResearchWaitResult)
    assert result.outcome == "completed"
    assert result.notebook_id == "nb_123"
    assert result.task_id == "task_abc"
    assert result.query == "AI research"
    assert result.sources == [_SERIALIZED_SOURCE]
    assert result.sources_count == 1
    assert result.report == "REPORT"
    assert result.import_result is None  # import_all=False default
    client.research.wait_for_completion.assert_awaited_once_with(
        "nb_123",
        timeout=5.0,
        initial_interval=1.0,
    )


# ---------------------------------------------------------------------------
# Timeout path
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_timeout_returns_outcome_without_completion():
    """A library timeout is mapped to outcome='timeout'."""
    plan = ResearchWaitPlan(notebook_id="nb_123", timeout=1, interval=1)
    client = _FakeClient(wait_side_effect=TimeoutError("timed out"))

    result = await execute_research_wait(plan, client=client, resolve_id=_fake_resolve)

    assert result.outcome == "timeout"
    assert result.timeout == 1
    assert result.import_result is None


# ---------------------------------------------------------------------------
# No-research path
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_no_research_returns_outcome_without_exit(base_plan):
    """no_research is a terminal wait value; service returns it (no SystemExit)."""
    client = _FakeClient(wait_side_effect=[{"status": "no_research"}])

    # The service must NOT raise SystemExit — that's the handler's job.
    result = await execute_research_wait(base_plan, client=client, resolve_id=_fake_resolve)

    assert result.outcome == "no_research"
    assert result.notebook_id == "nb_123"
    assert result.sources == []
    assert result.import_result is None


@pytest.mark.asyncio
async def test_failed_returns_outcome_without_import(base_plan):
    """failed is terminal and must not fall through to completed/import behavior."""
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "failed",
                "task_id": "task_failed",
                "query": "AI research",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "Partial report",
            }
        ]
    )
    import_mock = AsyncMock()

    result = await execute_research_wait(
        base_plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    assert result.outcome == "failed"
    assert result.task_id == "task_failed"
    assert result.query == "AI research"
    assert result.sources == [_SERIALIZED_SOURCE]
    assert result.report == "Partial report"
    assert result.import_result is None
    import_mock.assert_not_awaited()


@pytest.mark.parametrize(
    ("status", "expected_outcome"),
    [
        ("failed", "failed"),
        ("completed", "completed"),
        ("cancelled", "failed"),
    ],
)
@pytest.mark.asyncio
async def test_terminal_payload_fields_are_normalized(
    base_plan,
    status: str,
    expected_outcome: str,
):
    """Malformed wait payload fields are coerced before CLI rendering."""
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": status,
                "task_id": "task_abc",
                "query": 123,
                "sources": None,
                "report": ["not", "a", "string"],
            }
        ]
    )

    result = await execute_research_wait(base_plan, client=client, resolve_id=_fake_resolve)

    assert result.outcome == expected_outcome
    assert result.query == ""
    assert result.sources == []
    assert result.sources_count == 0
    assert result.report == ""


# ---------------------------------------------------------------------------
# Library wait delegation
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_wait_delegates_timeout_and_interval_to_library():
    """The service passes CLI wait budget values into the Python API."""
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_pinned",
                "query": "AI",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R",
            }
        ]
    )
    plan = ResearchWaitPlan(notebook_id="nb_123", timeout=10, interval=1)

    result = await execute_research_wait(plan, client=client, resolve_id=_fake_resolve)

    assert result.outcome == "completed"
    client.research.wait_for_completion.assert_awaited_once_with(
        "nb_123",
        timeout=10.0,
        initial_interval=1.0,
    )


@pytest.mark.asyncio
async def test_task_id_never_set_when_wait_result_has_none():
    """If wait result has no task_id, the importer guard stays off."""
    client = _FakeClient(
        wait_side_effect=[{"status": "completed", "query": "X", "sources": [], "report": ""}]
    )
    plan = ResearchWaitPlan(notebook_id="nb_123", timeout=5, interval=1)

    result = await execute_research_wait(plan, client=client, resolve_id=_fake_resolve)

    assert result.outcome == "completed"
    assert result.task_id is None
    client.research.wait_for_completion.assert_awaited_once()


# ---------------------------------------------------------------------------
# Import-all path
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_import_all_invokes_importer_with_pinned_task_id():
    """When import_all=True and a task_id was pinned, importer is invoked."""
    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI research",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R",
            }
        ]
    )
    import_mock = AsyncMock(
        return_value=ResearchImportResult(
            imported=[{"id": "src_1", "title": "S"}],
            sources=[{"title": "S", "url": "http://example.com"}],
            cited_selection=None,
        )
    )

    result = await execute_research_wait(
        plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    assert result.outcome == "completed"
    assert result.import_result is not None
    assert result.import_result.imported == [{"id": "src_1", "title": "S"}]
    import_mock.assert_awaited_once_with(
        client,
        "nb_123",
        "task_abc",
        [_SERIALIZED_SOURCE],
        report="R",
        cited_only=False,
        max_elapsed=300,
        status_message="Importing sources...",
    )


@pytest.mark.asyncio
async def test_import_all_passes_json_output_flag():
    """In JSON mode, importer receives json_output=True instead of status_message."""
    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
        json_output=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R",
            }
        ]
    )
    import_mock = AsyncMock(
        return_value=ResearchImportResult(
            imported=[{"id": "src_1", "title": "S"}],
            sources=[{"title": "S", "url": "http://example.com"}],
            cited_selection=None,
        )
    )

    await execute_research_wait(
        plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    call_kwargs = import_mock.await_args.kwargs
    assert call_kwargs.get("json_output") is True
    assert "status_message" not in call_kwargs


@pytest.mark.asyncio
async def test_import_all_skipped_when_no_task_id():
    """No task_id => importer is NOT invoked (handler-parity guard)."""
    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "query": "AI",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R",
                # NO task_id key.
            }
        ]
    )
    import_mock = AsyncMock()

    result = await execute_research_wait(
        plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    assert result.outcome == "completed"
    assert result.import_result is None
    import_mock.assert_not_awaited()


@pytest.mark.asyncio
async def test_import_all_skipped_when_no_sources():
    """Empty sources list => importer is NOT invoked."""
    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [],
                "report": "R",
            }
        ]
    )
    import_mock = AsyncMock()

    result = await execute_research_wait(
        plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    assert result.outcome == "completed"
    assert result.import_result is None
    import_mock.assert_not_awaited()


@pytest.mark.asyncio
async def test_import_all_passes_cited_only_flag():
    """plan.cited_only flows through to the importer's cited_only kwarg."""
    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
        cited_only=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R cites http://example.com",
            }
        ]
    )
    import_mock = AsyncMock(
        return_value=ResearchImportResult(
            imported=[{"id": "src_1", "title": "S"}],
            sources=[{"title": "S", "url": "http://example.com"}],
            cited_selection=None,
        )
    )

    await execute_research_wait(
        plan,
        client=client,
        resolve_id=_fake_resolve,
        import_sources=import_mock,
    )

    assert import_mock.await_args.kwargs.get("cited_only") is True


# ---------------------------------------------------------------------------
# Wait-context injection (spinner seam)
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_wait_context_is_entered_and_exited(base_plan):
    """The handler-injected wait_context wraps the library wait call."""
    enter_count = {"n": 0}
    exit_count = {"n": 0}

    @contextlib.asynccontextmanager
    async def tracking_context() -> AsyncIterator[None]:
        enter_count["n"] += 1
        try:
            yield
        finally:
            exit_count["n"] += 1

    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [],
                "report": "",
            }
        ]
    )

    await execute_research_wait(
        base_plan,
        client=client,
        resolve_id=_fake_resolve,
        wait_context=tracking_context,
    )

    assert enter_count["n"] == 1
    assert exit_count["n"] == 1


@pytest.mark.asyncio
async def test_default_wait_context_is_noop(base_plan):
    """The default null context lets the service run without any spinner."""
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [],
                "report": "",
            }
        ]
    )

    # No wait_context passed; default must work.
    result = await execute_research_wait(base_plan, client=client, resolve_id=_fake_resolve)
    assert result.outcome == "completed"


@pytest.mark.asyncio
async def test_wait_context_exits_before_import_runs():
    """Spinner-vs-import ordering: import MUST run after the wait context exits.

    The pre-extraction handler kept the wait spinner open ONLY around the wait
    loop, and called the importer (which has its own spinner) after the wait
    spinner closed. This ordering matters because two live Rich spinners
    overlap badly; verifying it directly guards the most subtle refactor risk
    flagged in review.
    """
    events: list[str] = []

    @contextlib.asynccontextmanager
    async def tracking_context() -> AsyncIterator[None]:
        events.append("wait_enter")
        try:
            yield
        finally:
            events.append("wait_exit")

    async def tracking_import(*_args, **_kwargs):
        events.append("import")
        return ResearchImportResult(
            imported=[{"id": "src_1", "title": "S"}],
            sources=[{"title": "S", "url": "http://example.com"}],
            cited_selection=None,
        )

    async def tracking_resolve(client, notebook_id, *, json_output=False):  # noqa: ARG001
        events.append("resolve")
        return notebook_id

    plan = ResearchWaitPlan(
        notebook_id="nb_123",
        timeout=300,
        interval=5,
        import_all=True,
    )
    client = _FakeClient(
        wait_side_effect=[
            {
                "status": "completed",
                "task_id": "task_abc",
                "query": "AI",
                "sources": [{"title": "S", "url": "http://example.com"}],
                "report": "R",
            }
        ]
    )

    await execute_research_wait(
        plan,
        client=client,
        wait_context=tracking_context,
        resolve_id=tracking_resolve,
        import_sources=tracking_import,
    )

    # The exact lifecycle ordering we depend on for spinner-non-overlap.
    assert events == ["resolve", "wait_enter", "wait_exit", "import"]


# ---------------------------------------------------------------------------
# Dataclass invariants
# ---------------------------------------------------------------------------


class TestResearchWaitPlan:
    def test_defaults(self):
        plan = ResearchWaitPlan(notebook_id="nb", timeout=10, interval=1)
        assert plan.import_all is False
        assert plan.cited_only is False
        assert plan.json_output is False

    def test_is_frozen(self):
        from dataclasses import FrozenInstanceError

        plan = ResearchWaitPlan(notebook_id="nb", timeout=10, interval=1)
        with pytest.raises(FrozenInstanceError):
            plan.notebook_id = "other"  # type: ignore[misc]


class TestResearchWaitResult:
    def test_sources_count(self):
        result = ResearchWaitResult(
            outcome="completed",
            notebook_id="nb",
            timeout=10,
            sources=[{"a": 1}, {"b": 2}],
        )
        assert result.sources_count == 2

    def test_defaults(self):
        result = ResearchWaitResult(outcome="no_research", notebook_id="nb", timeout=10)
        assert result.task_id is None
        assert result.query == ""
        assert result.sources == []
        assert result.report == ""
        assert result.import_result is None