from django.test import TestCase
from unittest.mock import patch

from rest_framework.test import APIClient

from apps.accounts.models import Team, TeamMember, User
from apps.ai.models import ModelConfig, ModelProvider
from apps.assets.models import Asset
from apps.billing.models import CreditAccount, CreditLedger
from apps.products.models import Product
from apps.projects.models import (
    Project,
    ProjectStage,
    ScriptSegment,
    ScriptVersion,
    SubtitleTrack,
    Timeline,
    TimelineClip,
    VideoSegment,
    VideoSegmentVersion,
)


class ProjectApiTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username="owner", password="pass")
        self.team = Team.objects.create(name="E2E Team", owner=self.user)
        TeamMember.objects.create(team=self.team, user=self.user, role=TeamMember.Role.OWNER)
        CreditAccount.objects.create(team=self.team, balance="100.0000")
        self.product = Product.objects.create(team=self.team, created_by=self.user, title="Test Product")
        self.provider = ModelProvider.objects.create(
            name="volcengine",
            display_name="Volcano",
            base_url="https://ark.cn-beijing.volces.com/api/v3",
        )
        self.model = ModelConfig.objects.create(
            provider=self.provider,
            name="doubao-seed-2-0-pro-260215",
            display_name="Doubao",
            capability=ModelConfig.Capability.TEXT,
            endpoint="chat/completions",
            unit_price="2.0000",
        )
        # 数据迁移(0006)会 seed 中转站文本模型,created_at 更早 → get_default_model 会选到它,
        # 从而路由到未被 patch 的 OpenAICompatibleProvider 打真网络。这里只保留自建 volcengine 模型为
        # active,确保命中可 mock 的 VolcanoArkProvider(生产有 bootstrap 豆包在前,默认仍是豆包,不受影响)。
        ModelConfig.objects.filter(capability=ModelConfig.Capability.TEXT).exclude(id=self.model.id).update(status="disabled")
        self.client = APIClient()
        self.client.force_authenticate(self.user)

    def test_create_project_initializes_pipeline(self):
        response = self.client.post(
            "/api/projects/",
            {"name": "Launch Video", "product": str(self.product.id)},
            format="json",
        )

        self.assertEqual(response.status_code, 201)
        project = Project.objects.get(id=response.data["id"])
        self.assertEqual(project.team, self.team)
        self.assertEqual(project.created_by, self.user)
        self.assertEqual(project.stages.count(), 5)
        self.assertEqual(project.video_segments.count(), 4)
        self.assertEqual(
            list(project.stages.values_list("stage", flat=True)),
            [
                ProjectStage.Stage.SCRIPT,
                ProjectStage.Stage.BASE_ASSETS,
                ProjectStage.Stage.STORYBOARD,
                ProjectStage.Stage.VIDEO,
                ProjectStage.Stage.EXPORT,
            ],
        )
        self.assertEqual(
            list(project.video_segments.values_list("target_duration_seconds", flat=True)),
            [15, 15, 15, 15],
        )
        self.assertEqual(
            list(project.video_segments.values_list("sort_order", flat=True)),
            [0, 1, 2, 3],
        )
        self.assertTrue(VideoSegment.objects.filter(project=project).exists())

    @patch("apps.ai.services.VolcanoArkProvider")
    def test_generate_script_creates_script_segments_and_charges_credit(self, provider_cls):
        provider = provider_cls.return_value
        provider.chat_completion.return_value = {
            "choices": [
                {
                    "message": {
                        "content": "1. 开场吸引\n2. 展示卖点\n3. 使用场景\n4. 促单转化",
                    }
                }
            ]
        }
        provider.extract_text.return_value = "1. 开场吸引\n2. 展示卖点\n3. 使用场景\n4. 促单转化"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="Launch Video")
        for stage in [
            ProjectStage.Stage.SCRIPT,
            ProjectStage.Stage.BASE_ASSETS,
            ProjectStage.Stage.STORYBOARD,
            ProjectStage.Stage.VIDEO,
            ProjectStage.Stage.EXPORT,
        ]:
            ProjectStage.objects.create(project=project, stage=stage)

        response = self.client.post(
            f"/api/projects/{project.id}/generate-script/",
            {"prompt": "突出高转化"},
            format="json",
        )

        self.assertEqual(response.status_code, 201)
        script = ScriptVersion.objects.get(project=project)
        self.assertEqual(script.segments.count(), 4)
        # 出稿(1)+ 人物/场景提取(1)各计费一次;此处 mock 提取返回非 JSON,提取仍按调用成功计费
        self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 2)

    @patch("apps.ai.services.VolcanoArkProvider")
    def test_rerun_script_segment_updates_one_segment_and_charges_once(self, provider_cls):
        provider = provider_cls.return_value
        provider.chat_completion.return_value = {"choices": [{"message": {"content": "x"}}]}
        provider.extract_text.return_value = "旁白：全新口播文案\n画面：全新画面描述"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        script = ScriptVersion.objects.create(project=project, title="脚本", content="...", is_adopted=True)
        seg0 = ScriptSegment.objects.create(script_version=script, sort_order=0, narration="旧0", visual_prompt="画0")
        seg1 = ScriptSegment.objects.create(script_version=script, sort_order=1, narration="旧1", visual_prompt="画1")

        response = self.client.post(
            f"/api/projects/{project.id}/rerun-script-segment/",
            {"segment_id": str(seg1.id), "instruction": "更俏皮"},
            format="json",
        )

        self.assertEqual(response.status_code, 200)
        seg0.refresh_from_db()
        seg1.refresh_from_db()
        self.assertEqual(seg1.narration, "全新口播文案")
        self.assertEqual(seg1.visual_prompt, "全新画面描述")
        # 其它分镜保持不动
        self.assertEqual(seg0.narration, "旧0")
        self.assertEqual(seg0.visual_prompt, "画0")
        # 返回的是该镜所属 ScriptVersion
        self.assertEqual(str(response.data["id"]), str(script.id))
        self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 1)

    def test_rerun_script_segment_rejects_foreign_segment(self):
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        other = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="O")
        other_script = ScriptVersion.objects.create(project=other, title="脚本", content="...")
        other_seg = ScriptSegment.objects.create(script_version=other_script, sort_order=0, narration="x")

        response = self.client.post(
            f"/api/projects/{project.id}/rerun-script-segment/",
            {"segment_id": str(other_seg.id)},
            format="json",
        )
        self.assertEqual(response.status_code, 404)

    # ── 流程文档 步骤③④:出稿后自动提取人物/场景(含建议提示词)并计费 ──
    @patch("apps.ai.services.VolcanoArkProvider")
    def test_generate_script_extracts_cast_scenes_and_bills(self, provider_cls):
        provider = provider_cls.return_value
        script_text = "镜头1\n旁白：开场\n画面：地铁里女主掏出面膜\n\n镜头2\n旁白：卖点\n画面：同事围观"
        # 提取调用让模型回 JSON(允许外面裹解释文字,验证容错)
        extract_text = '这是结果：{"cast":[{"name":"女主","prompt":"26岁都市女性,自然妆"},{"name":"同事","prompt":"职场女性"}],"scenes":[{"name":"地铁","prompt":"早高峰地铁车厢"}]}'
        provider.chat_completion.side_effect = [{"r": 1}, {"r": 2}]
        provider.extract_text.side_effect = [script_text, extract_text]
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        ProjectStage.objects.create(project=project, stage=ProjectStage.Stage.SCRIPT)

        response = self.client.post(f"/api/projects/{project.id}/generate-script/", {"prompt": "x"}, format="json")
        self.assertEqual(response.status_code, 201)

        project.refresh_from_db()
        self.assertEqual(project.metadata.get("cast"), ["女主", "同事"])
        self.assertEqual(project.metadata.get("scenes"), ["地铁"])
        self.assertEqual(project.metadata.get("cast_prompts", {}).get("女主"), "26岁都市女性,自然妆")
        self.assertEqual(project.metadata.get("scene_prompts", {}).get("地铁"), "早高峰地铁车厢")
        # 出稿 + 提取,各计费一次
        self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 2)

    @patch("apps.ai.services.VolcanoArkProvider")
    def test_extract_failure_releases_credit_and_keeps_script(self, provider_cls):
        """提取调用抛错:必须退掉提取的预扣(不计费),且不影响脚本已出稿(出稿那笔照扣)。"""
        provider = provider_cls.return_value
        provider.chat_completion.side_effect = [{"r": 1}, RuntimeError("ark down")]
        provider.extract_text.side_effect = ["镜头1\n旁白：x\n画面：y", AssertionError("不应走到")]
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        ProjectStage.objects.create(project=project, stage=ProjectStage.Stage.SCRIPT)

        response = self.client.post(f"/api/projects/{project.id}/generate-script/", {"prompt": "x"}, format="json")
        self.assertEqual(response.status_code, 201)
        self.assertEqual(ScriptVersion.objects.filter(project=project).count(), 1)
        # 出稿计费 1 笔;提取失败 → release,不产生第 2 笔 CHARGE
        self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 1)

    @patch("apps.ai.services._store_generated_media")
    @patch("apps.ai.services.get_image_provider")
    def test_generate_base_asset_stores_tag_label(self, get_provider, store_media):
        """流程步骤④:按脚本标签生成基础资产时,label 落进 group.metadata,供前端把结果归回标签卡。"""
        ModelConfig.objects.create(
            provider=self.provider, name="img-model", display_name="Img",
            capability=ModelConfig.Capability.IMAGE, endpoint="images/generations", unit_price="1.0000",
        )
        asset = Asset.objects.create(
            team=self.team, created_by=self.user, name="女主",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.AI_GENERATED, category=Asset.Category.PERSON,
        )
        store_media.return_value = asset
        provider = get_provider.return_value
        provider.image_generation.return_value = {"data": [{"url": "http://x/img.png"}]}
        provider.extract_first_media_url.return_value = "http://x/img.png"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")

        response = self.client.post(
            f"/api/projects/{project.id}/generate-base-asset/",
            {"kind": "person", "prompt": "26岁都市女性", "label": "女主"},
            format="json",
        )
        # 异步:秒回 202 + 任务;EAGER 下 worker 任务就地执行,组已落库,label 进 metadata
        self.assertEqual(response.status_code, 202)
        self.assertIn("task", response.data)
        from apps.projects.models import BaseAssetGroup
        group = BaseAssetGroup.objects.get(project=project, kind=BaseAssetGroup.Kind.PERSON)
        self.assertEqual(group.metadata.get("label"), "女主")

    @patch("apps.ai.services._store_generated_media")
    @patch("apps.ai.services.get_image_provider")
    def test_product_base_asset_uses_cover_image_as_reference(self, get_provider, store_media):
        """商品三视图:商品有主图时走 image_edit 以主图为参考(锁包装一致),而非纯文生图。"""
        from apps.assets.models import AssetFile

        ModelConfig.objects.create(
            provider=self.provider, name="img-model", display_name="Img",
            capability=ModelConfig.Capability.IMAGE, endpoint="images/generations", unit_price="1.0000",
        )
        # 商品主图资产(带可访问 preview_url)
        cover = Asset.objects.create(
            team=self.team, created_by=self.user, name="主图",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.UPLOAD, category=Asset.Category.PRODUCT_IMAGE,
        )
        AssetFile.objects.create(asset=cover, object_key="k.png", bucket="b", content_type="image/png", preview_url="http://x/cover.png", is_primary=True)
        self.product.cover_asset = cover
        self.product.save(update_fields=["cover_asset"])

        out = Asset.objects.create(
            team=self.team, created_by=self.user, name="商品三视图",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.AI_GENERATED, category=Asset.Category.PRODUCT_IMAGE,
        )
        store_media.return_value = out
        provider = get_provider.return_value
        provider.image_edit.return_value = {"data": [{"url": "http://x/tri.png"}]}
        provider.extract_first_media_url.return_value = "http://x/tri.png"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")

        response = self.client.post(
            f"/api/projects/{project.id}/generate-base-asset/",
            {"kind": "product", "prompt": "商品三视图"},
            format="json",
        )
        self.assertEqual(response.status_code, 202)  # 异步:秒回任务,EAGER 下 worker 就地出图
        # 走 image_edit 且把商品主图 URL 作为参考图传入,未走纯文生图
        provider.image_edit.assert_called_once()
        self.assertEqual(provider.image_edit.call_args.kwargs["images"], ["http://x/cover.png"])
        provider.image_generation.assert_not_called()

    @patch("apps.ai.services._store_generated_media")
    @patch("apps.ai.services.get_image_provider")
    def test_product_base_asset_falls_back_without_cover(self, get_provider, store_media):
        """商品无主图时回落纯文生图(image_generation),不报错。"""
        ModelConfig.objects.create(
            provider=self.provider, name="img-model", display_name="Img",
            capability=ModelConfig.Capability.IMAGE, endpoint="images/generations", unit_price="1.0000",
        )
        out = Asset.objects.create(
            team=self.team, created_by=self.user, name="商品三视图",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.AI_GENERATED, category=Asset.Category.PRODUCT_IMAGE,
        )
        store_media.return_value = out
        provider = get_provider.return_value
        provider.image_generation.return_value = {"data": [{"url": "http://x/tri.png"}]}
        provider.extract_first_media_url.return_value = "http://x/tri.png"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")

        response = self.client.post(
            f"/api/projects/{project.id}/generate-base-asset/",
            {"kind": "product", "prompt": "商品三视图"},
            format="json",
        )
        self.assertEqual(response.status_code, 202)  # 异步:秒回任务,EAGER 下 worker 就地出图
        provider.image_generation.assert_called_once()
        provider.image_edit.assert_not_called()

    @patch("apps.ai.services._store_generated_media")
    @patch("apps.ai.services.get_image_provider")
    def test_triview_async_binds_group_to_portrait(self, get_provider, store_media):
        """三视图异步:提交秒回 202;EAGER 下 worker 就地以立绘为参考 image_edit,生成的组 triview_of 绑定该立绘。"""
        from apps.assets.models import AssetFile
        from apps.projects.models import BaseAssetGroup

        ModelConfig.objects.create(
            provider=self.provider, name="img-model", display_name="Img",
            capability=ModelConfig.Capability.IMAGE, endpoint="images/generations", unit_price="1.0000",
        )
        portrait = Asset.objects.create(
            team=self.team, created_by=self.user, name="立绘",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.AI_GENERATED, category=Asset.Category.PERSON,
        )
        AssetFile.objects.create(asset=portrait, object_key="p.png", bucket="b", content_type="image/png", preview_url="http://x/portrait.png", is_primary=True)
        tri = Asset.objects.create(
            team=self.team, created_by=self.user, name="三视图",
            asset_type=Asset.Type.IMAGE, source=Asset.Source.AI_GENERATED, category=Asset.Category.PERSON,
        )
        store_media.return_value = tri
        provider = get_provider.return_value
        provider.image_edit.return_value = {"data": [{"url": "http://x/tri.png"}]}
        provider.extract_first_media_url.return_value = "http://x/tri.png"
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")

        response = self.client.post(
            f"/api/projects/{project.id}/generate-triview/",
            {"portrait_asset_id": str(portrait.id)},
            format="json",
        )
        self.assertEqual(response.status_code, 202)
        provider.image_edit.assert_called_once()
        self.assertEqual(provider.image_edit.call_args.kwargs["images"], ["http://x/portrait.png"])
        group = BaseAssetGroup.objects.get(project=project, kind=BaseAssetGroup.Kind.PERSON)
        self.assertEqual(group.metadata.get("triview_of"), str(portrait.id))
        self.assertEqual(group.adopted_asset_id, tri.id)

    def test_extract_cast_and_scenes_parsing_is_robust(self):
        """纯函数:_coerce_tag_entries 去重/容错;无可用模型时 extract 返回空且不抛。"""
        from apps.ai.services import _coerce_tag_entries, extract_cast_and_scenes
        names, prompts = _coerce_tag_entries(
            [{"name": "女主", "prompt": "p1"}, {"name": "女主", "prompt": "dup"}, {"name": "无"}, "同事"]
        )
        self.assertEqual(names, ["女主", "同事"])  # 去重 + 过滤占位「无」+ 容忍纯字符串项
        self.assertEqual(prompts["女主"], "p1")
        ModelConfig.objects.filter(capability=ModelConfig.Capability.TEXT).update(status=ModelConfig.Status.DISABLED)
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        self.assertEqual(
            extract_cast_and_scenes(project=project, user=self.user, content="脚本"),
            {"cast": [], "scenes": [], "cast_prompts": {}, "scene_prompts": {}},
        )

    def test_adopt_video_version_remaps_timeline_draft(self):
        """切换采用版本后,时间线草稿里引用本场旧版本资产的片段必须跟随换成新资产(剪辑台/导出都读草稿)。"""
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="P")
        make_asset = lambda name: Asset.objects.create(
            team=self.team, created_by=self.user, name=name,
            asset_type=Asset.Type.VIDEO, source=Asset.Source.AI_GENERATED, category=Asset.Category.VIDEO_CLIP,
        )
        old_asset, new_asset = make_asset("v1"), make_asset("v2")
        segment = VideoSegment.objects.create(project=project, sort_order=0)
        old_ver = VideoSegmentVersion.objects.create(video_segment=segment, asset=old_asset, is_adopted=True)
        new_ver = VideoSegmentVersion.objects.create(video_segment=segment, asset=new_asset)
        segment.adopted_version = old_ver
        segment.save(update_fields=["adopted_version"])
        timeline = Timeline.objects.create(project=project)
        clip = TimelineClip.objects.create(
            timeline=timeline, asset=old_asset, sort_order=0,
            duration_ms=15000, trim_start_ms=1000, trim_end_ms=9000,
        )

        response = self.client.post(
            f"/api/projects/{project.id}/adopt-video-version/",
            {"video_segment_id": str(segment.id), "version_id": str(new_ver.id)},
            format="json",
        )

        self.assertEqual(response.status_code, 200)
        clip.refresh_from_db()
        self.assertEqual(clip.asset_id, new_asset.id)
        # 旧素材上的裁剪点对新素材无意义,必须复位
        self.assertEqual(clip.trim_start_ms, 0)
        self.assertIsNone(clip.trim_end_ms)

    def _make_audio_model(self):
        return ModelConfig.objects.create(
            provider=self.provider, name="doubao-voice-bigtts", display_name="豆包语音合成",
            capability="audio", endpoint="api/v1/tts", unit_price="2.0000",
        )

    @patch("apps.ai.services.TosStorage")
    @patch("apps.ai.services.VolcanoTtsProvider")
    def test_generate_voiceover_creates_assets_and_charges_once(self, provider_cls, storage_cls):
        """每镜旁白 TTS:产出音频资产、timeline.metadata 落映射、一次调用只计一次费。"""
        self._make_audio_model()
        provider = provider_cls.return_value
        provider.configured = True
        provider.synthesize.return_value = (b"fake-mp3-bytes", 4200)
        stored = storage_cls.return_value.upload_fileobj.return_value
        stored.object_key, stored.bucket, stored.content_type, stored.size_bytes = "k.mp3", "b", "audio/mpeg", 14

        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="VO")
        response = self.client.post(
            f"/api/projects/{project.id}/generate-voiceover/",
            {"items": [{"index": 0, "text": "第一镜旁白"}, {"index": 1, "text": "第二镜旁白"}]},
            format="json",
        )

        self.assertEqual(response.status_code, 201)
        voiceover = response.json()["voiceover"]
        self.assertTrue(voiceover["enabled"])
        self.assertEqual(len(voiceover["items"]), 2)
        self.assertEqual(provider.synthesize.call_count, 2)
        from apps.assets.models import Asset as AssetModel
        self.assertEqual(AssetModel.objects.filter(team=self.team, asset_type="audio").count(), 2)
        self.assertEqual(
            CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 1
        )
        project.refresh_from_db()
        self.assertEqual(len(project.timeline.metadata["voiceover"]["items"]), 2)

    @patch("apps.ai.services.VolcanoTtsProvider")
    def test_generate_voiceover_unconfigured_returns_400_and_no_charge(self, provider_cls):
        """语音凭证未配置:400 + 人话提示,不建任务不扣费。"""
        self._make_audio_model()
        provider_cls.return_value.configured = False
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="VO2")
        response = self.client.post(
            f"/api/projects/{project.id}/generate-voiceover/",
            {"items": [{"index": 0, "text": "旁白"}]},
            format="json",
        )
        self.assertEqual(response.status_code, 400)
        self.assertIn("语音合成未配置", response.json()["detail"])
        self.assertEqual(CreditLedger.objects.filter(team=self.team, ledger_type=CreditLedger.Type.CHARGE).count(), 0)

    def test_export_command_mixes_voiceover_above_bgm(self):
        """导出命令:人声按片段起点 adelay 延迟、先与原声 amix、再与 BGM amix。"""
        from apps.projects.services.export import _build_export_command

        specs = [{"ts": 0.0, "te": 15.0, "dur": 15.0}, {"ts": 0.0, "te": 15.0, "dur": 15.0}]
        cmd = _build_export_command(
            n=2, specs=specs, starts=[0.0, 15.0], total=30.0, transition="none",
            sub_overlays=[], bgm_name="bgm.mp3", bgm_volume=0.6, has_audio=[False, False],
            voice_overlays=[("vo0.mp3", 0.0, 15.0), ("vo1.mp3", 15.0, 15.0)],
        )
        self.assertIn("vo0.mp3", cmd)
        self.assertIn("vo1.mp3", cmd)
        graph = cmd[cmd.index("-filter_complex") + 1]
        self.assertIn("adelay=15000|15000", graph)
        self.assertIn("[avoice][vo0][vo1]amix=inputs=3", graph)
        self.assertIn("[anarr][abgm]amix=inputs=2", graph)

    def test_save_timeline_updates_voiceover_offsets(self):
        """拖动字幕块后保存:按 asset 回写句内起点 offset_ms,未拖动的句不受影响。"""
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="VOFF")
        Timeline.objects.create(project=project, metadata={"voiceover": {"enabled": True, "items": [
            {"index": 0, "cue": 0, "asset": "a1", "text": "x", "duration_ms": 2000, "offset_ms": 0},
            {"index": 0, "cue": 1, "asset": "a2", "text": "y", "duration_ms": 2000, "offset_ms": 2000},
        ]}})
        response = self.client.post(
            f"/api/projects/{project.id}/save-timeline/",
            {"voiceover": {"items": [{"asset": "a2", "offset_ms": 9000}]}},
            format="json",
        )
        self.assertEqual(response.status_code, 200)
        project.timeline.refresh_from_db()
        items = project.timeline.metadata["voiceover"]["items"]
        self.assertEqual(items[0]["offset_ms"], 0)
        self.assertEqual(items[1]["offset_ms"], 9000)

    def test_subtitle_cues_use_end_ms_and_follow_voiceover(self):
        """字幕烧入时序:cue 自带 end_ms 时按它收尾(不再拖到片段尾)——这是配音对齐的关键;
        无保存字幕的回退路径,有配音时逐句窗口也要压进语音真实时长。"""
        from apps.projects.services.export import _subtitle_cues

        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="SUB")
        timeline = Timeline.objects.create(
            project=project,
            metadata={"voiceover": {"enabled": True, "items": [{"index": 0, "asset": "x", "text": "t", "duration_ms": 4000}]}},
        )
        SubtitleTrack.objects.create(timeline=timeline, enabled=True, content=[
            {"start_ms": 0, "end_ms": 2000, "text": "第一句"},
            {"start_ms": 2000, "end_ms": 4000, "text": "第二句"},
        ])
        specs = [{"ts": 0.0, "te": 15.0, "dur": 15.0}]
        cues = _subtitle_cues(timeline, project, specs, [0.0], 15.0)
        self.assertEqual(len(cues), 2)
        self.assertEqual((cues[0][0], cues[0][1]), (0.0, 2.0))
        self.assertEqual(cues[1][1], 4.0)  # 最后一句在语音念完处收尾,而非拖到 15s

    def test_save_timeline_voiceover_toggle_and_clear(self):
        """保存草稿可关/开配音、可移除映射(不动已生成的音频资产)。"""
        project = Project.objects.create(team=self.team, created_by=self.user, product=self.product, name="VO3")
        Timeline.objects.create(
            project=project,
            metadata={"voiceover": {"enabled": True, "voice_type": "v", "items": [{"index": 0, "asset": "a", "text": "t"}]}},
        )
        response = self.client.post(
            f"/api/projects/{project.id}/save-timeline/", {"voiceover": {"enabled": False}}, format="json"
        )
        self.assertEqual(response.status_code, 200)
        project.timeline.refresh_from_db()
        self.assertFalse(project.timeline.metadata["voiceover"]["enabled"])

        response = self.client.post(
            f"/api/projects/{project.id}/save-timeline/", {"voiceover": {"clear": True}}, format="json"
        )
        self.assertEqual(response.status_code, 200)
        project.timeline.refresh_from_db()
        self.assertNotIn("voiceover", project.timeline.metadata)


class WorkerGateTests(TestCase):
    """无 Celery worker 时,图片/视频生成入口必须 503 拒绝(防结果无人取回=数据丢失)。"""

    def setUp(self):
        self.user = User.objects.create_user(username="gate", password="pass")
        self.team = Team.objects.create(name="Gate Team", owner=self.user)
        TeamMember.objects.create(team=self.team, user=self.user, role=TeamMember.Role.OWNER)
        CreditAccount.objects.create(team=self.team, balance="100.0000")
        self.product = Product.objects.create(team=self.team, created_by=self.user, title="Gate Product")
        self.project = Project.objects.create(team=self.team, created_by=self.user, name="Gate", product=self.product)
        self.client = APIClient()
        self.client.force_authenticate(self.user)

    def _blocked(self):
        return patch("apps.common.celery_health.celery_worker_available", return_value=False)

    def test_generation_endpoints_blocked_without_worker(self):
        cases = [
            (f"/api/projects/{self.project.id}/generate-base-asset/", {"kind": "person"}),
            (f"/api/projects/{self.project.id}/generate-triview/", {"portrait_asset_id": "x"}),
            (f"/api/projects/{self.project.id}/generate-storyboard/", {}),
            (f"/api/projects/{self.project.id}/submit-video-segment/", {"video_segment_id": "x"}),
            ("/api/ai/generate-image/", {"prompt": "测试"}),
        ]
        with self._blocked():
            for url, payload in cases:
                response = self.client.post(url, payload, format="json")
                self.assertEqual(response.status_code, 503, msg=f"{url} 应被 worker 闸拦截")
                self.assertIn("worker", response.json()["detail"].lower() if isinstance(response.json().get("detail"), str) else "")

    def test_eager_mode_bypasses_gate(self):
        from apps.common.celery_health import celery_worker_available

        # 测试配置 CELERY_TASK_ALWAYS_EAGER=True:任务就地执行,无需 worker,闸放行
        self.assertTrue(celery_worker_available())

    def test_ping_failure_means_unavailable(self):
        from apps.common import celery_health

        celery_health._cache["expires"] = 0.0
        with self.settings(CELERY_TASK_ALWAYS_EAGER=False):
            with patch.object(celery_health, "_ping_workers", side_effect=ConnectionError("broker down")):
                self.assertFalse(celery_health.celery_worker_available())
        celery_health._cache["expires"] = 0.0