"""路由器 → pipeline 的 ``tts_this_turn`` 字段传递契约测试。

回归保护：FE（``app-expo/src/core/ws/client.ts`` 与
``app-expo/src/features/conversation/realtime-session.ts``）一律以蛇形 ``tts_this_turn``
作为 WebSocket payload 的 ``data`` 字段名；后端 ``ws/router.py`` 三个对话入口分支也按
``data.get("tts_this_turn")`` 取值并传递给 pipeline。

这里不依赖完整 WebSocket runtime，只在两处验证契约：

1. **数据形状契约**：用 FE 实际发送的 payload 形状（snake_case key）调用
   ``data.get("tts_this_turn")``，断言能取到 True；同时驼峰 ``ttsThisTurn`` 应取不到，
   防止后续有人把后端 key 改成驼峰。
2. **wrapper 透传契约**：直接驱动 ``process_persisted_user_segment_response``
   （路由 TEXT / AUDIO_MESSAGE 分支唯一会调用的 pipeline 包装），mock 内部 DB +
   ``process_user_message``，断言 ``tts_this_turn=True`` 被原样传到 ``process_user_message``。
"""

from __future__ import annotations

from contextlib import asynccontextmanager
from types import SimpleNamespace
from unittest.mock import AsyncMock

import pytest

from app.features.conversation.ws import pipeline as ws_pipeline


# ── 数据形状契约 ────────────────────────────────────────────────


def test_router_text_payload_extracts_tts_this_turn_snake_case() -> None:
    """FE 发送 ``{type:'text', data:{text, tts_this_turn:true}}``，后端按蛇形读取。"""
    fe_payload_data = {"text": "hi", "tts_this_turn": True}
    assert bool(fe_payload_data.get("tts_this_turn")) is True

    # 缺省 / 显式 false：均应取到 False
    assert bool({"text": "hi"}.get("tts_this_turn")) is False
    assert bool({"text": "hi", "tts_this_turn": False}.get("tts_this_turn")) is False

    # 驼峰回归保护：FE 历史曾误传过驼峰，蛇形 get 必须取不到，避免静默吞掉
    assert bool({"text": "hi", "ttsThisTurn": True}.get("tts_this_turn")) is False


def test_router_audio_segment_payload_extracts_tts_this_turn_snake_case() -> None:
    """FE ``sendAudioSegment`` 也按 ``data.tts_this_turn`` 输出，蛇形保持一致。"""
    fe_payload_data = {
        "audio_base64": "AAA",
        "segment_index": 0,
        "voice_session_id": "vs-1",
        "is_last": True,
        "duration": 3,
        "tts_this_turn": True,
    }
    assert bool(fe_payload_data.get("tts_this_turn")) is True


# ── wrapper 透传契约 ────────────────────────────────────────────


@pytest.mark.asyncio
async def test_process_persisted_user_segment_response_passes_tts_this_turn(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """路由 TEXT 分支 → ``process_persisted_user_segment_response`` → ``process_user_message``。"""
    captured: dict = {}

    async def _spy_process_user_message(*args, **kwargs) -> None:
        captured.update(kwargs)
        # 兼容位置参数（实际调用是关键字调用，这里只为防御性记录）
        captured["_args"] = args

    monkeypatch.setattr(ws_pipeline, "process_user_message", _spy_process_user_message)

    conversation = SimpleNamespace(
        id="conv-1",
        user_id="user-1",
        deleted_at=None,
        last_message_at=None,
    )
    user = SimpleNamespace(id="user-1", language_preference="zh")
    segment = SimpleNamespace(
        id="seg-1",
        conversation_id="conv-1",
        user_input_text="说说童年",
        created_at=None,
    )

    fake_db = SimpleNamespace(
        get=AsyncMock(
            side_effect=lambda model, oid: {
                "conv-1": conversation,
                "user-1": user,
                "seg-1": segment,
            }.get(oid)
        )
    )

    @asynccontextmanager
    async def _fake_session_local():
        yield fake_db

    monkeypatch.setattr(ws_pipeline, "AsyncSessionLocal", _fake_session_local)

    await ws_pipeline.process_persisted_user_segment_response(
        conversation_id="conv-1",
        user_id="user-1",
        segment_id="seg-1",
        tts_this_turn=True,
    )

    assert captured.get("tts_this_turn") is True, (
        "router TEXT/AUDIO_MESSAGE 分支必须把 tts_this_turn=True 透传到 process_user_message"
    )
    assert captured.get("conversation_id") == "conv-1"
    assert captured.get("user_message") == "说说童年"


@pytest.mark.asyncio
async def test_process_persisted_user_segment_response_default_tts_this_turn_false(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """缺省（未开本轮朗读）必须以 False 透传，不能被默默改成 True。"""
    captured: dict = {}

    async def _spy_process_user_message(*_args, **kwargs) -> None:
        captured.update(kwargs)

    monkeypatch.setattr(ws_pipeline, "process_user_message", _spy_process_user_message)

    conversation = SimpleNamespace(
        id="conv-2", user_id="user-2", deleted_at=None, last_message_at=None
    )
    user = SimpleNamespace(id="user-2", language_preference="zh")
    segment = SimpleNamespace(
        id="seg-2",
        conversation_id="conv-2",
        user_input_text="x",
        created_at=None,
    )

    fake_db = SimpleNamespace(
        get=AsyncMock(
            side_effect=lambda model, oid: {
                "conv-2": conversation,
                "user-2": user,
                "seg-2": segment,
            }.get(oid)
        )
    )

    @asynccontextmanager
    async def _fake_session_local():
        yield fake_db

    monkeypatch.setattr(ws_pipeline, "AsyncSessionLocal", _fake_session_local)

    await ws_pipeline.process_persisted_user_segment_response(
        conversation_id="conv-2",
        user_id="user-2",
        segment_id="seg-2",
        # 不传 tts_this_turn → 默认 False
    )

    assert captured.get("tts_this_turn") is False