"""AI 数字人口型 TTS Celery 异步任务 — 单元测试.

覆盖 lipsync_tts.py 的全部主要分支：
- Job 不存在/cancelled/正常/异常路径
- TTS 合成、音频下载、OSS 上传、MediaKit 提交
- CosyVoiceError/ValueError/MediaKitError/顶层异常等错误码
"""

import os
import sys
import types
from types import ModuleType
from unittest.mock import MagicMock, patch

os.environ.setdefault("JWT_SECRET_KEY", "dev-secret-key-for-testing")


class _FakeQuery:
    """模拟 SQLAlchemy query.filter().first() 链式调用."""

    def __init__(self, job):
        self._job = job

    def filter(self, *args, **kwargs):
        return self

    def first(self):
        return self._job


def _make_fake_job(**kwargs):
    """构造可 setattr 的 job 记录."""
    job = MagicMock()
    job.id = kwargs.get("job_id", "job-1")
    job.user_id = kwargs.get("user_id", "user-1")
    job.status = kwargs.get("status", "tts_processing")
    job.audio_url = kwargs.get("audio_url", "")
    job.video_url = kwargs.get("video_url", "https://oss/video.mp4")
    job.mediakit_task_id = kwargs.get("mediakit_task_id", "")
    job.enable_video_loop = kwargs.get("enable_video_loop", False)
    job.error_code = ""
    job.error_message = ""
    job.submitted_at = None
    job.updated_at = None
    return job


def _build_session(job):
    """构造 mock DB session + factory. 返回 (session, factory)."""
    session = MagicMock()
    session.query.return_value = _FakeQuery(job)
    session.commit = MagicMock()
    session.close = MagicMock()
    factory = MagicMock(return_value=session)
    return session, factory


def _apply_all_patches(
    *,
    job=None,
    cosyvoice_service=None,
    cosyvoice_side_effect=None,
    cosyvoice_error=None,
    download_bytes=b"AUDIO",
    download_error=None,
    storage=None,
    mk_client=None,
    mk_submit_return=None,
    mk_submit_error=None,
):
    """统一构造测试需要的 patch 列表.

    lipsync_tts.run() 在函数体内部懒 import 多个模块，通过 sys.modules 注入
    伪造包路径避免真实导入；对存在的模块用 patch() 替换返回值/side_effect。
    """
    # SessionLocal 通过懒探测获取（Worker 用 worker_app.db，API 用 app.db），
    # 测试环境里两个模块都能被真实导入，必须同时 mock 保证用的是 fake session。
    fake_app_db = ModuleType("app.db")
    fake_worker_db = ModuleType("worker_app.db")
    session, factory = _build_session(job)
    fake_app_db.SessionLocal = factory
    fake_worker_db.SessionLocal = factory

    patches = [
        patch.dict(sys.modules, {"app.db": fake_app_db, "worker_app.db": fake_worker_db}),
        patch(
            "app.tasks.lipsync_tts._sign_media_url",
            side_effect=lambda url: url + "?signed" if url else url,
        ),
    ]

    # CosyVoice
    if cosyvoice_service is not None:
        cosy_instance = cosyvoice_service
    else:
        cosy_instance = MagicMock()
        if cosyvoice_side_effect is not None:
            cosy_instance.submit_synthesize_task.side_effect = cosyvoice_side_effect
        elif cosyvoice_error is not None:
            cosy_instance.submit_synthesize_task.side_effect = cosyvoice_error
        else:
            cosy_instance.submit_synthesize_task.return_value = {"audio_url": "https://tts/raw.mp3"}
    patches.append(patch("packages.application.cosyvoice_service.CosyVoiceService", return_value=cosy_instance))

    # safe_download_bytes
    if download_error is not None:
        patches.append(patch("packages.shared.url_security.safe_download_bytes", side_effect=download_error))
    else:
        patches.append(patch("packages.shared.url_security.safe_download_bytes", return_value=download_bytes))

    # Storage
    if storage is None:
        storage = MagicMock()
        storage.public_url = "https://oss.example.com"
        storage.upload_file.return_value = "https://oss.example.com/tts.mp3"
    patches.append(patch("packages.shared.storage.get_shared_storage_service", return_value=storage))

    # MediaKit client
    if mk_client is not None:
        patches.append(patch("app.services.mediakit_client.get_mediakit_client", return_value=mk_client))
    else:
        client = MagicMock()
        if mk_submit_error is not None:
            client.submit_lipsync.side_effect = mk_submit_error
        else:
            client.submit_lipsync.return_value = mk_submit_return or {"task_id": "mk-1"}
        patches.append(patch("app.services.mediakit_client.get_mediakit_client", return_value=client))

    return session, patches


class TestTtsSynthesizeAndSubmit:
    """测试 Celery 任务 tts_synthesize_and_submit.run 的所有分支."""

    def test_job_not_found_returns_early(self):
        """Job 不存在 → 日志报错直接返回，不抛异常."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        session, patches = _apply_all_patches(job=None)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("missing-job", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        session.commit.assert_not_called()
        session.close.assert_called_once()

    def test_cancelled_job_skipped(self):
        """Job 已 cancelled → 跳过不处理，不调用 TTS/MediaKit."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job(status="cancelled")
        session, patches = _apply_all_patches(job=job)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        # cancelled 不应 commit，不应触发 TTS/MediaKit
        session.commit.assert_not_called()
        session.close.assert_called_once()

    def test_happy_path_tts_to_mediakit(self):
        """完整正常流程：TTS 合成 → OSS 上传 → 签名 → 提交 MediaKit → submitted."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        mk_client = MagicMock()
        mk_client.submit_lipsync.return_value = {"task_id": "mk-999"}
        session, patches = _apply_all_patches(job=job, mk_client=mk_client)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好世界", 1.0, "happy")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        assert job.status == "submitted"
        assert job.mediakit_task_id == "mk-999"
        assert job.error_code == ""
        mk_client.submit_lipsync.assert_called_once()
        call_kwargs = mk_client.submit_lipsync.call_args.kwargs
        assert call_kwargs["client_token"] == "job-1"
        # CosyVoice 临时 URL 经 _sign_media_url 透传（mock 统一追加 ?signed），
        # 自家 OSS 才会被重签，外部 URL 原样透传；job.audio_url 存原始临时 URL
        assert call_kwargs["audio_url"] == "https://tts/raw.mp3?signed"
        assert job.audio_url == "https://tts/raw.mp3"
        session.commit.assert_called()
        session.close.assert_called_once()

    def test_cosyvoice_error_marks_tts_synthesis_failed(self):
        """CosyVoiceError → failed, error_code=TTSSynthesisFailed."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        from packages.application.cosyvoice_service import CosyVoiceError

        job = _make_fake_job()
        session, patches = _apply_all_patches(job=job, cosyvoice_error=CosyVoiceError("tts boom"))
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        assert job.status == "failed"
        assert job.error_code == "TTSSynthesisFailed"
        session.close.assert_called_once()

    def test_value_error_marks_tts_invalid_param(self):
        """ValueError（参数错误）→ failed, error_code=TTSInvalidParam."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        session, patches = _apply_all_patches(job=job, cosyvoice_side_effect=ValueError("bad param"))
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", -1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        assert job.status == "failed"
        assert job.error_code == "TTSInvalidParam"
        session.close.assert_called_once()

    def test_no_audio_url_marks_tts_no_audio(self):
        """TTS 返回空 audio_url → failed, error_code=TTSNoAudio."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        cosy = MagicMock()
        cosy.submit_synthesize_task.return_value = {"audio_url": ""}
        session, patches = _apply_all_patches(job=job, cosyvoice_service=cosy)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        assert job.status == "failed"
        assert job.error_code == "TTSNoAudio"
        session.close.assert_called_once()

    def test_oss_upload_failure_falls_back_to_temp_url(self):
        """OSS 上传失败 → 回退临时 URL，仍然 submitted."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        storage = MagicMock()
        storage.public_url = "https://oss.example.com"
        storage.upload_file.side_effect = RuntimeError("oss down")
        mk_client = MagicMock()
        mk_client.submit_lipsync.return_value = {"task_id": "mk-7"}
        session, patches = _apply_all_patches(job=job, storage=storage, mk_client=mk_client)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        # 上传失败后 audio_url 回退为临时 TTS URL，仍继续提交到 MediaKit
        assert job.audio_url == "https://tts/raw.mp3"
        assert job.status == "submitted"
        assert job.mediakit_task_id == "mk-7"
        mk_client.submit_lipsync.assert_called_once()
        session.close.assert_called_once()

    def test_mediakit_error_marks_mediakit_unavailable(self):
        """MediaKit 提交失败 → failed, error_code=MediaKitUnavailable."""
        from app.services.mediakit_client import MediaKitError
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        mk_err = MediaKitError("mk down", code="MediaKitUnavailable")
        session, patches = _apply_all_patches(job=job, mk_submit_error=mk_err)
        entered = [p.__enter__() for p in patches]
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        assert job.status == "failed"
        assert job.error_code == "MediaKitUnavailable"
        session.close.assert_called_once()

    def test_top_level_exception_marks_async_task_error(self):
        """顶层未预期异常 → failed, error_code=AsyncTaskError."""
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        job = _make_fake_job()
        fake_app_db = ModuleType("app.db")
        fake_worker_db = ModuleType("worker_app.db")
        session, factory = _build_session(job)
        fake_app_db.SessionLocal = factory
        fake_worker_db.SessionLocal = factory

        # CosyVoiceService 在 __init__ 抛 RuntimeError（非 CosyVoiceError/ValueError）
        fake_cosy_mod = ModuleType("packages.application.cosyvoice_service")

        class _CosyVoiceErrorForTest(Exception):
            pass

        class _BoomService:
            def __init__(self):
                raise RuntimeError("top-level boom")

        fake_cosy_mod.CosyVoiceError = _CosyVoiceErrorForTest
        fake_cosy_mod.CosyVoiceService = _BoomService

        with patch.dict(
            sys.modules,
            {
                "app.db": fake_app_db,
                "worker_app.db": fake_worker_db,
                "packages.application.cosyvoice_service": fake_cosy_mod,
            },
        ):
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")

        assert job.status == "failed"
        assert job.error_code == "AsyncTaskError"
        session.close.assert_called()


class TestSignMediaUrl:
    """覆盖模块内 _sign_media_url 的所有分支（CI 增量覆盖率需要）."""

    def test_empty_url_returns_empty(self):
        from app.tasks.lipsync_tts import _sign_media_url

        assert _sign_media_url("") == ""
        assert _sign_media_url(None) is None

    def test_own_oss_url_signed(self):
        """自家 OSS URL → 调用 storage.get_download_url 签名."""
        from app.tasks.lipsync_tts import _sign_media_url

        fake_storage = MagicMock()
        fake_storage.public_url = "https://oss.example.com/"
        fake_storage.get_download_url.return_value = "https://oss.example.com/a?sig=xyz"

        with patch("packages.shared.storage.get_shared_storage_service", return_value=fake_storage):
            result = _sign_media_url("https://oss.example.com/lipsync/a.mp3")

        assert result == "https://oss.example.com/a?sig=xyz"
        fake_storage.get_download_url.assert_called_once()

    def test_external_url_passthrough(self):
        """外部 URL（不是自家 OSS host）→ 原样透传，不签名."""
        from app.tasks.lipsync_tts import _sign_media_url

        fake_storage = MagicMock()
        fake_storage.public_url = "https://oss.example.com/"

        with patch("packages.shared.storage.get_shared_storage_service", return_value=fake_storage):
            result = _sign_media_url("https://tts.example.com/raw.mp3")

        assert result == "https://tts.example.com/raw.mp3"
        fake_storage.get_download_url.assert_not_called()

    def test_storage_exception_falls_back(self):
        """storage 调用异常 → 降级原样返回，不抛错."""
        from app.tasks.lipsync_tts import _sign_media_url

        with patch(
            "packages.shared.storage.get_shared_storage_service",
            side_effect=RuntimeError("storage down"),
        ):
            result = _sign_media_url("https://oss.example.com/a.mp3")

        assert result == "https://oss.example.com/a.mp3"

    def test_no_public_url_passthrough(self):
        """storage.public_url 为空 → 原样透传."""
        from app.tasks.lipsync_tts import _sign_media_url

        fake_storage = MagicMock()
        fake_storage.public_url = ""

        with patch("packages.shared.storage.get_shared_storage_service", return_value=fake_storage):
            result = _sign_media_url("https://anything.example.com/a.mp3")

        assert result == "https://anything.example.com/a.mp3"
        fake_storage.get_download_url.assert_not_called()


class TestPersistOutputVideoTask:
    """persist_output_video_task：下载 MediaKit 临时视频 → 上传自有 OSS → 更新 DB."""

    def _make_persist_job(self, **kwargs):
        job = MagicMock()
        job.id = kwargs.get("job_id", "job-1")
        job.user_id = kwargs.get("user_id", "user-1")
        job.output_video_url = kwargs.get("output_video_url", "https://temp.mk/output.mp4")
        job.updated_at = None
        return job

    def _persist_patches(self, *, job, video_bytes=b"FAKEMP4", download_side_effect=None, upload_url=None):
        """统一 patch：SessionLocal、httpx.Client、storage、_sign_media_url."""
        fake_app_db = ModuleType("app.db")
        fake_worker_db = ModuleType("worker_app.db")
        session, factory = _build_session(job)
        fake_app_db.SessionLocal = factory
        fake_worker_db.SessionLocal = factory

        # httpx.Client 上下文管理器
        fake_response = MagicMock()
        fake_response.content = video_bytes
        fake_response.raise_for_status = MagicMock()
        fake_client = MagicMock()
        fake_client.get.return_value = fake_response
        fake_client_cm = MagicMock()
        fake_client_cm.__enter__ = MagicMock(return_value=fake_client)
        fake_client_cm.__exit__ = MagicMock(return_value=False)
        FakeHttpxClient = MagicMock(return_value=fake_client_cm)
        if download_side_effect is not None:
            fake_client.get.side_effect = download_side_effect

        # storage
        storage = MagicMock()
        storage.public_url = "https://oss.example.com/"
        storage.upload_file.return_value = upload_url or "https://oss.example.com/lipsync-outputs/user-1/job-1.mp4"
        # _sign_media_url 内部会调 storage.get_download_url，必须mock返回字符串
        _upload_url = upload_url or "https://oss.example.com/lipsync-outputs/user-1/job-1.mp4"
        storage.get_download_url.return_value = _upload_url + "?signed"

        fake_httpx = ModuleType("httpx")
        fake_httpx.Client = FakeHttpxClient

        patches = [
            patch.dict(
                sys.modules,
                {"app.db": fake_app_db, "worker_app.db": fake_worker_db, "httpx": fake_httpx},
            ),
            patch("packages.shared.storage.get_shared_storage_service", return_value=storage),
            patch("app.tasks.lipsync_tts._sign_media_url", side_effect=lambda url: url + "?signed" if url else url),
        ]
        return session, fake_client, storage, patches

    def test_success_download_upload_updates_db(self):
        """正常路径：下载 temp_url → 上传 OSS → 签名 → 写回 DB commit."""
        from app.tasks.lipsync_tts import persist_output_video_task

        job = self._make_persist_job(output_video_url="https://temp.mk/x.mp4")
        session, fake_client, storage, patches = self._persist_patches(
            job=job, video_bytes=b"VIDEODATA", upload_url="https://oss.example.com/lipsync-outputs/user-1/job-1.mp4"
        )
        entered = [p.__enter__() for p in patches]
        try:
            persist_output_video_task("job-1", "user-1", "https://temp.mk/x.mp4")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        fake_client.get.assert_called_once_with("https://temp.mk/x.mp4")
        storage.upload_file.assert_called_once()
        call_args = storage.upload_file.call_args.args
        # 上传的 key 必须是 lipsync-outputs/{user_id}/{job_id}.mp4
        assert call_args[1] == "lipsync-outputs/user-1/job-1.mp4"
        # upload_file 返回永久 URL，再被 _sign_media_url 追加 ?signed
        assert job.output_video_url == "https://oss.example.com/lipsync-outputs/user-1/job-1.mp4?signed"
        assert job.updated_at is not None
        session.commit.assert_called_once()
        session.close.assert_called_once()

    def test_download_failure_keeps_temp_url_no_commit(self):
        """下载失败（raise）→ 记录 warning、保留 temp_url、不抛异常."""
        from app.tasks.lipsync_tts import persist_output_video_task

        job = self._make_persist_job(output_video_url="https://temp.mk/x.mp4")
        session, fake_client, storage, patches = self._persist_patches(
            job=job, download_side_effect=RuntimeError("network down")
        )
        entered = [p.__enter__() for p in patches]
        try:
            persist_output_video_task("job-1", "user-1", "https://temp.mk/x.mp4")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        storage.upload_file.assert_not_called()
        # output_video_url 保持原值（temp_url）
        assert job.output_video_url == "https://temp.mk/x.mp4"
        # 内层 except 不会 commit
        # 注：若内部发生 commit 说明测试失败
        session.close.assert_called_once()

    def test_empty_temp_url_skips_persist(self):
        """temp_url 为空 → 直接返回，不下载不上传."""
        from app.tasks.lipsync_tts import persist_output_video_task

        job = self._make_persist_job(output_video_url="")
        session, fake_client, storage, patches = self._persist_patches(job=job)
        entered = [p.__enter__() for p in patches]
        try:
            persist_output_video_task("job-1", "user-1", "")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        fake_client.get.assert_not_called()
        storage.upload_file.assert_not_called()
        session.commit.assert_not_called()
        session.close.assert_called_once()

    def test_job_not_found_returns_early(self):
        """DB 中找不到 job → 直接返回，不抛错."""
        from app.tasks.lipsync_tts import persist_output_video_task

        session, fake_client, storage, patches = self._persist_patches(job=None)
        entered = [p.__enter__() for p in patches]
        try:
            persist_output_video_task("missing", "user-1", "https://temp.mk/x.mp4")
        finally:
            for p in reversed(patches):
                p.__exit__(None, None, None)

        fake_client.get.assert_not_called()
        storage.upload_file.assert_not_called()
        session.commit.assert_not_called()
        session.close.assert_called_once()


class TestLipsyncServiceRefreshCompletedAsyncPersist:
    """refresh_job_status 在 completed 分支异步转存的单元测试（补 0% 覆盖的 316~335 行）."""

    def test_refresh_completed_dispatches_persist_task(self):
        """completed 分支：设置 temp_url → commit → dispatch persist_output_video_task.apply_async."""
        from app.services.lipsync_service import LipsyncService

        mock_job = MagicMock()
        mock_job.id = "job-1"
        mock_job.user_id = "user-1"
        mock_job.mediakit_task_id = "mk-1"
        mock_job.status = "submitted"
        mock_job.output_video_url = ""
        mock_job.output_duration = 0.0

        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = mock_job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query

        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "completed",
            "result": {"video_url": "https://temp.mk/out.mp4", "duration": 25.5},
        }

        fake_persist_task = MagicMock()
        svc = LipsyncService(mock_db, client=mock_client, cosyvoice_service=MagicMock())
        with patch.dict("sys.modules", {}):
            # 直接 patch 懒 import 路径
            with patch("app.tasks.lipsync_tts.persist_output_video_task", fake_persist_task, create=False):
                # 但懒 import 发生在函数内部 from app.tasks.lipsync_tts import persist_output_video_task
                # 通过 patch sys.modules 的方式提供
                import sys as _sys

                fake_mod = MagicMock()
                fake_mod.persist_output_video_task = fake_persist_task
                _sys.modules["app.tasks.lipsync_tts"] = fake_mod
                try:
                    result = svc.refresh_job_status("job-1", "user-1")
                finally:
                    _sys.modules.pop("app.tasks.lipsync_tts", None)

        assert result.status == "completed"
        assert result.output_video_url == "https://temp.mk/out.mp4"
        assert result.output_duration == 25.5
        mock_db.commit.assert_called()
        # 必须在 commit 之后 dispatch
        fake_persist_task.apply_async.assert_called_once()
        kwargs = fake_persist_task.apply_async.call_args.kwargs
        assert kwargs["args"] == ("job-1", "user-1", "https://temp.mk/out.mp4")

    def test_refresh_completed_dispatch_exception_does_not_break_return(self):
        """apply_async 抛异常（如 Celery 不可用）→ 捕获 warning，仍返回 completed job."""
        from app.services.lipsync_service import LipsyncService

        mock_job = MagicMock()
        mock_job.id = "job-2"
        mock_job.user_id = "user-1"
        mock_job.mediakit_task_id = "mk-2"
        mock_job.status = "submitted"
        mock_job.output_video_url = ""
        mock_job.output_duration = 0.0

        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = mock_job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query

        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "completed",
            "result": {"video_url": "https://temp.mk/out2.mp4", "duration": 10.0},
        }

        fake_persist_task = MagicMock()
        fake_persist_task.apply_async.side_effect = ConnectionError("celery down")

        svc = LipsyncService(mock_db, client=mock_client, cosyvoice_service=MagicMock())
        import sys as _sys

        fake_mod = MagicMock()
        fake_mod.persist_output_video_task = fake_persist_task
        _sys.modules["app.tasks.lipsync_tts"] = fake_mod
        try:
            result = svc.refresh_job_status("job-2", "user-1")
        finally:
            _sys.modules.pop("app.tasks.lipsync_tts", None)

        # 即便 dispatch 失败，主流程不受影响：仍然返回 completed + temp_url
        assert result.status == "completed"
        assert result.output_video_url == "https://temp.mk/out2.mp4"
        fake_persist_task.apply_async.assert_called_once()


class TestRefreshJobStatusDbRollback:
    """#1867 三层防御 ②：refresh_job_status DB commit 失败时 rollback 不 raise."""

    def test_refresh_db_commit_failure_rollback_and_return(self):
        """commit 抛异常 → rollback，不 raise，返回当前 job 对象让下次轮询重试."""
        from app.services.lipsync_service import LipsyncService

        mock_job = MagicMock()
        mock_job.id = "job-rollback"
        mock_job.user_id = "u"
        mock_job.mediakit_task_id = "mk"
        mock_job.status = "submitted"
        mock_job.output_video_url = ""
        mock_job.output_duration = 0.0

        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = mock_job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query
        mock_db.commit.side_effect = Exception("DB connection lost")

        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "completed",
            "result": {"video_url": "https://temp.mk/out.mp4", "duration": 5.0},
        }

        # refresh_job_status 内部懒 import persist_output_video_task
        # 用 patch 替换模块属性，create=True 因为原模块里它是 shared_task，patch 后是 MagicMock
        with patch("app.tasks.lipsync_tts.persist_output_video_task", MagicMock(), create=True):
            svc = LipsyncService(mock_db, client=mock_client, cosyvoice_service=MagicMock())
            result_job = svc.refresh_job_status("job-rollback", "u")

        assert result_job is mock_job
        mock_db.rollback.assert_called()

    def test_refresh_intermediate_status_commits(self):
        """中间状态（running/processing 等）→ 更新 status 和 updated_at，正常 commit."""
        from app.services.lipsync_service import LipsyncService

        mock_job = MagicMock()
        mock_job.id = "job-mid"
        mock_job.user_id = "u"
        mock_job.mediakit_task_id = "mk"
        mock_job.status = "submitted"
        mock_job.output_video_url = ""
        mock_job.output_duration = 0.0

        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = mock_job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query

        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {"status": "processing"}

        svc = LipsyncService(mock_db, client=mock_client, cosyvoice_service=MagicMock())
        result_job = svc.refresh_job_status("job-mid", "u")
        assert result_job is mock_job
        assert mock_job.status == "processing"
        mock_db.commit.assert_called()
        mock_db.rollback.assert_not_called()

    def test_refresh_failed_commits_error_info(self):
        """failed 状态 → 写入 error_message/error_code/completed_at，commit."""
        from app.services.lipsync_service import LipsyncService

        mock_job = MagicMock()
        mock_job.id = "job-fail"
        mock_job.user_id = "u"
        mock_job.mediakit_task_id = "mk"
        mock_job.status = "submitted"
        mock_job.output_video_url = ""
        mock_job.output_duration = 0.0

        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = mock_job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query

        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "failed",
            "error": {"code": "BadAudio", "message": "音频损坏"},
        }

        svc = LipsyncService(mock_db, client=mock_client, cosyvoice_service=MagicMock())
        result_job = svc.refresh_job_status("job-fail", "u")
        assert result_job.status == "failed"
        assert mock_job.error_message == "音频损坏"
        assert mock_job.error_code == "BadAudio"
        mock_db.commit.assert_called()


class TestPollMediakitStatus:
    """#1867 三层防御 ③：Celery 兜底轮询任务单元测试."""

    def _make_session(self, job):
        mock_db = MagicMock()
        mock_query = MagicMock()
        mock_filter = MagicMock()
        mock_filter.first.return_value = job
        mock_query.filter.return_value = mock_filter
        mock_db.query.return_value = mock_query
        return mock_db

    def _patch_sessions(self, mock_db):
        """用 patch.dict 注入 fake SessionLocal 到 worker_app.db 和 app.db."""
        from types import ModuleType

        fake_app_db = ModuleType("app.db")
        fake_worker_db = ModuleType("worker_app.db")
        fake_sl = MagicMock(return_value=mock_db)
        fake_app_db.SessionLocal = fake_sl
        fake_worker_db.SessionLocal = fake_sl
        fake_worker_pkg = ModuleType("worker_app")
        return patch.dict(
            sys.modules,
            {
                "worker_app": fake_worker_pkg,
                "worker_app.db": fake_worker_db,
                "app.db": fake_app_db,
            },
        )

    def _run(self, mock_db, job_id="j", user_id="u1", fake_self=None):
        from app.tasks.lipsync_tts import poll_mediakit_status

        self_ref = fake_self if fake_self is not None else MagicMock()
        real = poll_mediakit_status._get_current_object()
        return real.run.__func__(self_ref, job_id=job_id, user_id=user_id), self_ref

    def test_poll_job_not_found_returns(self):
        mock_db = self._make_session(None)
        with self._patch_sessions(mock_db):
            self._run(mock_db, job_id="missing")
        mock_db.close.assert_called_once()

    def test_poll_terminal_completed_skips_mediakit(self):
        mock_job = MagicMock(status="completed", mediakit_task_id="mk-1")
        mock_db = self._make_session(mock_job)
        with self._patch_sessions(mock_db), patch("app.services.mediakit_client.get_mediakit_client") as fg:
            self._run(mock_db)
            fg.assert_not_called()
        mock_db.close.assert_called_once()

    def test_poll_terminal_failed_skips(self):
        mock_job = MagicMock(status="failed", mediakit_task_id="mk-1")
        mock_db = self._make_session(mock_job)
        with self._patch_sessions(mock_db), patch("app.services.mediakit_client.get_mediakit_client") as fg:
            self._run(mock_db, job_id="j1b")
            fg.assert_not_called()

    def test_poll_terminal_cancelled_skips(self):
        mock_job = MagicMock(status="cancelled", mediakit_task_id="mk-1")
        mock_db = self._make_session(mock_job)
        with self._patch_sessions(mock_db), patch("app.services.mediakit_client.get_mediakit_client") as fg:
            self._run(mock_db, job_id="j1c")
            fg.assert_not_called()

    def test_poll_no_mk_task_id_returns(self):
        mock_job = MagicMock(status="submitted", mediakit_task_id=None)
        mock_db = self._make_session(mock_job)
        with self._patch_sessions(mock_db):
            self._run(mock_db, job_id="j6")
        mock_db.close.assert_called_once()

    def test_poll_succeeded_marks_completed(self):
        mock_job = MagicMock(status="submitted", mediakit_task_id="mk-2", output_video_url="", output_duration=0.0)
        mock_db = self._make_session(mock_job)
        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "succeeded",
            "result": {"video_url": "https://temp/x.mp4", "duration": 12.0},
        }
        with (
            self._patch_sessions(mock_db),
            patch("app.services.mediakit_client.get_mediakit_client", return_value=mock_client),
            patch("app.services.lipsync_service.LipsyncService") as MS,
        ):
            svc = MS.return_value
            svc._persist_output_video.return_value = "https://oss/x.mp4"
            self._run(mock_db, job_id="j2")
        assert mock_job.status == "completed"
        assert mock_job.output_video_url == "https://oss/x.mp4"
        assert mock_job.output_duration == 12.0
        svc._persist_output_video.assert_called_once_with("https://temp/x.mp4", "j2", "u1")
        mock_db.commit.assert_called()

    def test_poll_succeeded_persist_fail_fallback(self):
        mock_job = MagicMock(status="submitted", mediakit_task_id="mk-3", output_video_url="", output_duration=0.0)
        mock_db = self._make_session(mock_job)
        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "succeeded",
            "result": {"video_url": "https://temp/y.mp4", "duration": 8.0},
        }
        with (
            self._patch_sessions(mock_db),
            patch("app.services.mediakit_client.get_mediakit_client", return_value=mock_client),
            patch("app.services.lipsync_service.LipsyncService") as MS,
        ):
            svc = MS.return_value
            svc._persist_output_video.side_effect = Exception("OSS down")
            self._run(mock_db, job_id="j3")
        assert mock_job.status == "completed"
        assert mock_job.output_video_url == "https://temp/y.mp4"

    def test_poll_failed_marks_failed(self):
        mock_job = MagicMock(status="running", mediakit_task_id="mk-4", error_message="", error_code="")
        mock_db = self._make_session(mock_job)
        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "failed",
            "error": {"code": "TaskFailed", "message": "音频错误"},
        }
        with (
            self._patch_sessions(mock_db),
            patch("app.services.mediakit_client.get_mediakit_client", return_value=mock_client),
        ):
            self._run(mock_db, job_id="j4")
        assert mock_job.status == "failed"
        assert mock_job.error_message == "音频错误"
        assert mock_job.error_code == "TaskFailed"

    def test_poll_error_status_marks_failed(self):
        mock_job = MagicMock(status="submitted", mediakit_task_id="mk-4b", error_message="", error_code="")
        mock_db = self._make_session(mock_job)
        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {
            "status": "error",
            "error": {"code": "Internal", "message": "内部错误"},
        }
        with (
            self._patch_sessions(mock_db),
            patch("app.services.mediakit_client.get_mediakit_client", return_value=mock_client),
        ):
            self._run(mock_db, job_id="j4b")
        assert mock_job.status == "failed"
        assert mock_job.error_message == "内部错误"

    def test_poll_running_triggers_retry(self):
        mock_job = MagicMock(status="submitted", mediakit_task_id="mk-5")
        mock_db = self._make_session(mock_job)
        mock_client = MagicMock()
        mock_client.get_task_status.return_value = {"status": "running"}

        class _Retry(Exception):
            pass

        fake_self = MagicMock()
        fake_self.retry.side_effect = _Retry()
        with (
            self._patch_sessions(mock_db),
            patch("app.services.mediakit_client.get_mediakit_client", return_value=mock_client),
            patch("app.services.lipsync_service.LipsyncService"),
        ):
            try:
                self._run(mock_db, job_id="j5", fake_self=fake_self)
                assert False, "expected retry"
            except _Retry:
                pass
        assert mock_job.updated_at is not None
        assert mock_job.status == "running"
        assert fake_self.retry.call_count >= 1


class TestTtsSubmitDispatchesPoll:
    """#1867 三层防御 ③：tts_synthesize_and_submit 成功后链式触发 poll."""

    def _run_tts(self, job, mk_client, fake_poll):
        """运行 tts_synthesize_and_submit.run，直接在用户函数 __globals__ 替换 poll_mediakit_status.

        pytest --import-mode=importlib 下，patch("app.tasks.lipsync_tts.xxx") 拿到的模块对象
        可能与 celery autoretry 包装下用户函数的 __globals__ 不一致（之前的 Poll 测试通过
        patch.dict(sys.modules, ...) 注入 fake 模块，进一步加剧了模块命名空间不一致）。
        直接 patch _orig_run.__func__.__globals__ 是最稳的方式。
        """
        from app.tasks.lipsync_tts import tts_synthesize_and_submit

        session, patches = _apply_all_patches(job=job, mk_client=mk_client)
        for p in patches:
            p.__enter__()
        # 定位 autoretry 包装下的真实用户函数
        real_tts = tts_synthesize_and_submit._get_current_object()
        fn = real_tts._orig_run
        while hasattr(fn, "__func__"):
            fn = fn.__func__
        g = fn.__globals__
        orig_poll = g.get("poll_mediakit_status")
        g["poll_mediakit_status"] = fake_poll
        try:
            tts_synthesize_and_submit.run("job-1", "user-1", "v1", "你好", 1.0, "")
        finally:
            if orig_poll is not None:
                g["poll_mediakit_status"] = orig_poll
            else:
                g.pop("poll_mediakit_status", None)
            for p in reversed(patches):
                p.__exit__(None, None, None)
        return session

    def test_submit_success_dispatches_poll(self):
        """提交 MediaKit 成功后链式触发 poll_mediakit_status.apply_async (countdown=10)."""
        job = _make_fake_job()
        job.emotion = ""
        mk_client = MagicMock()
        mk_client.submit_lipsync.return_value = {"success": True, "task_id": "mk-poll-1"}
        fake_poll = MagicMock()
        self._run_tts(job, mk_client, fake_poll)
        assert job.status == "submitted"
        assert job.mediakit_task_id == "mk-poll-1"
        fake_poll.apply_async.assert_called_once()
        kwargs = fake_poll.apply_async.call_args.kwargs
        assert kwargs["kwargs"] == {"job_id": "job-1", "user_id": "user-1"}
        assert kwargs["countdown"] == 10

    def test_submit_failure_no_poll(self):
        from app.services.mediakit_client import MediaKitError

        job = _make_fake_job()
        job.emotion = ""
        mk_client = MagicMock()
        mk_client.submit_lipsync.side_effect = MediaKitError("bad", code="X")
        fake_poll = MagicMock()
        self._run_tts(job, mk_client, fake_poll)
        assert job.status == "failed"
        fake_poll.apply_async.assert_not_called()

    def test_poll_dispatch_fail_does_not_break(self):
        job = _make_fake_job()
        job.emotion = ""
        mk_client = MagicMock()
        mk_client.submit_lipsync.return_value = {"success": True, "task_id": "mk-poll-2"}
        fake_poll = MagicMock()
        fake_poll.apply_async.side_effect = ConnectionError("celery down")
        session = self._run_tts(job, mk_client, fake_poll)
        assert job.status == "submitted"
        assert job.mediakit_task_id == "mk-poll-2"
        session.commit.assert_called()