"""EvalTraceService 在 chapter 快照路径返回 dialogue_lineage。"""

from __future__ import annotations

from types import SimpleNamespace
from unittest.mock import MagicMock

import pytest
from sqlalchemy.ext.asyncio import AsyncSession

from app.features.evaluation.eval_trace_service import EvalTraceService
from app.features.memoir.chapter_evidence_snapshot import (
    EVIDENCE_SNAPSHOT_SCHEMA_VERSION,
)


@pytest.mark.asyncio
async def test_build_chapter_bundle_dialogue_lineage_from_snapshot() -> None:
    msg_ln = {
        "schema_version": 1,
        "conversation_id": "cv1",
        "turns": [
            {"user_message_id": "um-99", "assistant_message_id": "as-99"},
        ],
    }
    snap = SimpleNamespace(
        user_id="u1",
        chapter_id="ch1",
        schema_version=EVIDENCE_SNAPSHOT_SCHEMA_VERSION,
        segment_ids=["s1"],
        conversation_ids=["cv1"],
        memory_chunk_ids=["mk1"],
        memory_fact_ids=[],
        timeline_event_ids=[],
        summary_ids=[],
        notes=[],
        message_lineage_json=msg_ln,
    )
    chapter = SimpleNamespace(
        id="ch1",
        user_id="u1",
        source_segments=["s1"],
        current_evidence_snapshot=snap,
        evidence_bundle_json=None,
    )
    db = MagicMock(spec=AsyncSession)
    svc = EvalTraceService(db)
    bundle = await svc.build_chapter_bundle("u1", chapter)
    assert bundle.dialogue_lineage == msg_ln
    assert bundle.dialogue_lineage["turns"][0]["user_message_id"] == "um-99"