"""Validation tests for memoir pipeline optimization (Phase A/B/C).

Tests:
- Phase1 batch path is now the default
- Memory enrichment is dispatched asynchronously
- Unified narrative unit executor produces correct results
- Post-commit fan-out includes quality pass
- Quality pass task handles title polishing
"""

from __future__ import annotations

from unittest.mock import MagicMock, patch

import pytest

from app.agents.memoir.classification_agent import ChapterClassifyResult
from app.agents.memoir.extraction_agent import ExtractionResult
from app.agents.memoir.orchestrator import MemoirOrchestrator
from app.agents.state_schema import MemoirStateSchema
from app.features.memoir.constants import memoir

# ---------------------------------------------------------------------------
# Phase1 batch path defaults
# ---------------------------------------------------------------------------


def test_phase1_batch_enabled_by_default() -> None:
    """memoir_phase1_batch_llm_enabled should default to True after optimization."""
    assert memoir.phase1_batch_llm_enabled is True
    assert memoir.phase1_batch_llm_chunk_size >= 1


def test_quality_pass_enabled_by_default() -> None:
    assert memoir.quality_pass_enabled is True


# ---------------------------------------------------------------------------
# Phase1 orchestrator selects batch path when available
# ---------------------------------------------------------------------------


def test_orchestrator_tries_batch_first(monkeypatch: pytest.MonkeyPatch) -> None:
    """When batch LLM is enabled and LLM is available, batch path should be attempted."""
    monkeypatch.setattr(
        "app.agents.memoir.orchestrator.memoir.phase1_batch_llm_enabled",
        True,
    )

    orch = MemoirOrchestrator()
    batch_called = {"flag": False}

    def fake_batch(*args, **kwargs):
        batch_called["flag"] = True
        return MagicMock(
            state=MemoirStateSchema(
                stage_order=["childhood"],
                current_stage="childhood",
                covered_stages=[],
                slots={},
            ),
            category_to_segments={},
            segment_skip_story_ids=set(),
            segment_chapter_category={},
        )

    orch._prepare_batches_via_batch_llm = fake_batch

    class _Seg:
        def __init__(self, sid: str) -> None:
            self.id = sid
            self.user_input_text = "test"

    st = MemoirStateSchema(
        stage_order=["childhood"],
        current_stage="childhood",
        covered_stages=[],
        slots={},
    )
    orch.prepare_batches(
        segments=[_Seg("s1")],
        llm=MagicMock(),
        llm_fast=MagicMock(),
        get_or_create_state=lambda: st,
        update_slot=lambda *a: st,
    )
    assert batch_called["flag"] is True


def test_orchestrator_fallback_to_sequential(monkeypatch: pytest.MonkeyPatch) -> None:
    """If batch path raises, should fall back to sequential extraction."""
    monkeypatch.setattr(
        "app.agents.memoir.orchestrator.memoir.phase1_batch_llm_enabled",
        True,
    )

    orch = MemoirOrchestrator()

    def fail_batch(*args, **kwargs):
        raise RuntimeError("batch LLM unavailable")

    orch._prepare_batches_via_batch_llm = fail_batch
    orch.extraction_agent.extract = MagicMock(
        return_value=ExtractionResult(
            detected_stage="childhood",
            slots={"place": "潍坊"},
        )
    )
    orch.classification_agent.classify = MagicMock(
        return_value=ChapterClassifyResult(category="childhood", llm_said_none=False)
    )

    st = MemoirStateSchema(
        stage_order=["childhood"],
        current_stage="childhood",
        covered_stages=[],
        slots={},
    )

    class _Seg:
        def __init__(self, sid: str, text: str) -> None:
            self.id = sid
            self.user_input_text = text

    result = orch.prepare_batches(
        segments=[_Seg("s1", "我小时候玩球")],
        llm=MagicMock(),
        llm_fast=MagicMock(),
        get_or_create_state=lambda: st,
        update_slot=lambda *a: st,
    )
    assert "s1" in result.segment_chapter_category


def test_orchestrator_sequential_filters_invalid_slots(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """Sequential fallback should match batch path slot validation."""
    monkeypatch.setattr(
        "app.agents.memoir.orchestrator.memoir.phase1_batch_llm_enabled",
        False,
    )

    orch = MemoirOrchestrator()
    orch.extraction_agent.extract = MagicMock(
        return_value=ExtractionResult(
            detected_stage="childhood",
            slots={"place": "潍坊", "hallucinated": "bad"},
        )
    )
    orch.classification_agent.classify = MagicMock(
        return_value=ChapterClassifyResult(category="childhood", llm_said_none=False)
    )

    st = MemoirStateSchema(
        stage_order=["childhood"],
        current_stage="childhood",
        covered_stages=[],
        slots={},
    )
    calls: list[tuple] = []

    class _Seg:
        id = "s1"
        user_input_text = "我小时候在潍坊。"

    def update_slot(*args):
        calls.append(args)
        return st

    orch.prepare_batches(
        segments=[_Seg()],
        llm=MagicMock(),
        get_or_create_state=lambda: st,
        update_slot=update_slot,
    )

    assert calls == [("childhood", "place", "潍坊", ["s1"])]


# ---------------------------------------------------------------------------
# Memory enrichment decoupled from ingest
# ---------------------------------------------------------------------------


def test_memory_service_exposes_async_batch_ingest_only() -> None:
    """MemoryService owns async ingest; legacy sync helpers stay deleted."""
    import inspect

    import app.features.memory.service as memory_service_module
    from app.features.memory.service import MemoryService

    assert hasattr(MemoryService, "ingest_transcripts_batch")
    legacy_one = "ingest_transcript" + "_sync"
    legacy_batch = "ingest_transcripts_batch" + "_sync"
    assert not hasattr(memory_service_module, legacy_one)
    assert not hasattr(memory_service_module, legacy_batch)
    source = inspect.getsource(MemoryService.ingest_transcripts_batch)
    assert "MemoryIngestService" in source


# ---------------------------------------------------------------------------
# Post-commit unified fan-out
# ---------------------------------------------------------------------------


def test_post_commit_result_includes_quality_pass() -> None:
    """PostCommitResult should have quality_pass_scheduled field."""
    from app.features.story.post_commit import PostCommitResult

    r = PostCommitResult()
    assert hasattr(r, "quality_pass_scheduled")
    assert r.quality_pass_scheduled is False


def test_post_commit_signature_accepts_quality_pass() -> None:
    """enqueue_story_post_commit_effects should accept need_quality_pass kwarg."""
    import inspect

    from app.features.story.post_commit import enqueue_story_post_commit_effects

    sig = inspect.signature(enqueue_story_post_commit_effects)
    assert "need_quality_pass" in sig.parameters
    assert "memoir_correlation_id" in sig.parameters


# ---------------------------------------------------------------------------
# resolve_append_target
# ---------------------------------------------------------------------------


def test_resolve_append_target_forced_new_on_overflow() -> None:
    """When canonical exceeds limit, should force new story."""
    from app.features.memoir.story_pipeline_sync import _resolve_append_target

    session = MagicMock()
    big_story = MagicMock()
    big_story.user_id = "u1"
    big_story.id = "story-1"
    big_story.canonical_markdown = "x" * 200_000
    session.get.return_value = big_story

    with patch(
        "app.features.memoir.story_pipeline_sync.count_story_versions_sync",
        return_value=1,
    ):
        tid, existing, dsrc = _resolve_append_target(
            session,
            route_decision="append_story",
            route_target_story_id="story-1",
            user_id="u1",
            chapter_category="childhood",
            oral_norm="short text",
            candidate_stories=[],
            story_meta={},
            decision_source="test",
            memoir_correlation_id=None,
        )
    assert tid is None
    assert dsrc == "forced_new_due_to_append_limit"


def test_resolve_append_target_does_not_guardrail_route_fallback() -> None:
    """No-LLM / parse fallback new_story decisions must not append by recency."""
    from app.features.memoir.story_pipeline_sync import _resolve_append_target

    session = MagicMock()
    candidate = MagicMock()
    candidate.id = "story-1"

    tid, existing, dsrc = _resolve_append_target(
        session,
        route_decision="new_story",
        route_target_story_id=None,
        user_id="u1",
        chapter_category="childhood",
        oral_norm="short text",
        candidate_stories=[candidate],
        story_meta={"story-1": {"char_count": 10, "version_count": 1}},
        decision_source="no_llm",
        memoir_correlation_id=None,
    )

    assert tid is None
    assert existing == ""
    assert dsrc == "no_llm"
    session.get.assert_not_called()


# ---------------------------------------------------------------------------
# _run_post_pipeline_commit helper
# ---------------------------------------------------------------------------


def test_run_post_pipeline_commit_calls_post_commit() -> None:
    """Shared helper should call enqueue_story_post_commit_effects."""
    from app.tasks.memoir_tasks import _run_post_pipeline_commit

    with (
        patch(
            "app.features.story.post_commit.enqueue_story_post_commit_effects"
        ) as mock_pc,
        patch(
            "app.features.memoir.memoir_images.settings.MemoirImageSettings"
        ) as mock_img,
    ):
        mock_pc.return_value = MagicMock(
            enqueued_story_image_count=0,
            enqueued_chapter_recompose_count=0,
            compaction_scheduled=False,
            quality_pass_scheduled=True,
            errors=[],
        )
        mock_img.from_env.return_value = MagicMock(enabled=False)

        _run_post_pipeline_commit(
            user_id="u1",
            story_dispatch_ids={"s1"},
            recompose_chapter_ids={"c1"},
            cover_chapter_ids=set(),
            trigger_source="test",
            need_compaction=False,
            need_quality_pass=True,
            memoir_correlation_id="cid-1",
        )
        mock_pc.assert_called_once()
        call_kwargs = mock_pc.call_args
        assert call_kwargs.kwargs["need_quality_pass"] is True
        assert call_kwargs.kwargs["memoir_correlation_id"] == "cid-1"