"""GPU 直连渲染管线：模板配置透传单测。

覆盖：标题样式（font/size/color/position/borderw/shadow）、静态字幕+ASR、BGM(volume/afade/adelay)、
额外音轨音量，以及不传 config 时的默认兼容行为。
"""

from __future__ import annotations

import sys
import types
from dataclasses import dataclass
from pathlib import Path

# 路径对齐（同其它 unit tests）
APP_ROOT = Path(__file__).resolve().parents[2] / "apps" / "worker"
sys.path.insert(0, str(APP_ROOT))
sys.path.insert(0, str(Path(__file__).resolve().parents[2]))

import pytest


# ---------------------------------------------------------------------------
# Stub helpers
# ---------------------------------------------------------------------------
@dataclass
class _StubSeg:
    text: str
    start: float
    end: float


class _StubClip:
    """最小可用 stub：只包含 build_direct_render 需要的属性。"""

    def __init__(
        self,
        *,
        local_path: str = "/tmp/_stub_clip.mp4",
        duration: float = 2.0,
        trim_start: float = 0.0,
        trim_end: float = 0.0,
        speed: float = 1.0,
        transition_type: str = "cut",
        config: dict | None = None,
        storage_key: str = "",
    ):
        self.local_path = local_path
        self.duration = duration
        self.trim_start = trim_start
        self.trim_end = trim_end
        self.speed = speed
        self.transition_type = transition_type
        _cfg = dict(config or {"volume": 1.0})
        if storage_key:
            _cfg["_storage_key"] = storage_key
        elif "_storage_key" not in _cfg:
            _cfg["_storage_key"] = "test/clip.mp4"
        self.config = _cfg
        self._width = 1280
        self._height = 720


def _make_clips(n: int = 2, dur: float = 2.0) -> list[_StubClip]:
    return [_StubClip(duration=dur) for _ in range(n)]


def _patch_pipeline_helpers(monkeypatch):
    """屏蔽 oss 上传和签名，避免依赖真实存储/网络；clip_has_audio/clip_volumes 通过参数传入。"""
    import video_processing.gpu_direct_pipeline as gdp

    monkeypatch.setattr(
        gdp,
        "sign_asset_url",
        lambda sk, expires=3600: f"https://oss.example.com/{sk}",
    )
    monkeypatch.setattr(
        gdp,
        "upload_local_audio_and_sign",
        lambda p: (f"https://oss.example.com/{Path(p).name}", f"osskey/{Path(p).name}"),
    )


# ---------------------------------------------------------------------------
# 基线：不传 config 保持旧默认行为
# ---------------------------------------------------------------------------
class TestNoConfigBackwardCompat:
    def test_default_title_drawtext_white_top(self, monkeypatch):
        """不传 title_config 时：白字、top、48@720 按 width 缩放到 85、y=89（50@720p baseline）。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(2, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            title_text="默认标题",
            total_duration=4.0,
            clip_has_audio=[True, True],
            clip_volumes=[1.0, 1.0],
        )
        fc = " ".join(plan.filter_complex)
        assert "fontcolor=0xffffff" in fc
        # 默认 position=top → y=89（scale(50)=89，与 CPU/vfb 一致），不含 h-th
        assert "y=89" in fc
        assert "h-th" not in fc
        # 默认字号 48@720 经 1280/720 缩放 = 85
        assert "fontsize=85" in fc
        assert "text='默认标题'" in fc
        # 默认粗体：黑色细描边 borderw=2@720（scale=4），与 CPU vfb 一致避免重影
        assert "borderw=4" in fc
        assert "bordercolor=0x000000" in fc

    def test_no_subtitle_when_none(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
        )
        fc = " ".join(plan.filter_complex)
        # 无标题无字幕时，应直接 format=yuv420p[vfinal]
        assert "format=yuv420p[vfinal]" in fc
        assert "drawtext=" not in fc


# ---------------------------------------------------------------------------
# 标题样式：font/size/color/position/borderw/shadow
# ---------------------------------------------------------------------------
class TestTitleStylePassthrough:
    def test_title_color_hex_converted_to_bgr(self, monkeypatch):
        """#ff0000(红) → 0xff0000；注意我们直接按 RRGGBB 透传给 drawtext。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "红色标题", "color": "#ff0000", "position": "top", "size": 60},
        )
        fc = " ".join(plan.filter_complex)
        assert "fontcolor=0xff0000" in fc
        # 60@720 按 1280/720 缩放 = 107
        assert "fontsize=107" in fc
        # top 位置默认 margin 50@720p → scale=89（未传 margin_top 用默认）
        assert "y=89" in fc
        assert "h-th" not in fc

    def test_title_position_center(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "居中标题", "position": "center"},
        )
        fc = " ".join(plan.filter_complex)
        assert "(h-text_h)/2" in fc

    def test_title_stroke_borderw(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={
                "text": "描边标题",
                "stroke": {"enabled": True, "width": 4, "color": "#0000ff"},
            },
        )
        fc = " ".join(plan.filter_complex)
        # stroke width 4@720 经 1280/720 缩放 = 7
        assert "borderw=7" in fc
        assert "bordercolor=0x0000ff" in fc

    def test_title_shadow_produces_two_drawtext_layers(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={
                "text": "阴影标题",
                "shadow": {"enabled": True, "offset_x": 3, "offset_y": 3, "color": "#000000@0.5"},
            },
        )
        # filter_complex 是 list[str]
        drawtext_count = sum(1 for f in plan.filter_complex if "drawtext=" in f)
        # 阴影层 + 主字层 = 2 条 drawtext
        assert drawtext_count == 2
        joined = " ".join(plan.filter_complex)
        # shadow offset 3@720 经 1280/720 缩放 = 5；默认 position=top → y=89
        assert "x=(w-text_w)/2+5" in joined
        assert "y=89+5" in joined
        assert "h-th" not in joined

    def test_title_font_override(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "自定义字体", "font": "Noto Serif CJK SC"},
        )
        fc = " ".join(plan.filter_complex)
        assert "font=Noto Serif CJK SC" in fc

    def test_title_disabled_hides_title(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            title_text="被禁用的标题",
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"enabled": False, "text": "被禁用的标题"},
        )
        fc = " ".join(plan.filter_complex)
        assert "drawtext=" not in fc

    def test_title_custom_position_uses_pct_xy(self, monkeypatch):
        """position=custom + pos_x/pos_y 百分比 → (w-text_w)*pct, (h-text_h)*pct。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={
                "text": "拖拽标题",
                "position": "custom",
                "pos_x": 30,
                "pos_y": 60,
            },
        )
        fc = " ".join(plan.filter_complex)
        assert "(w-text_w)*0.3000" in fc
        assert "(h-text_h)*0.6000" in fc
        assert "h-th-" not in fc
        assert "y=89" not in fc

    def test_title_margin_top_respected(self, monkeypatch):
        """margin_top 透传：100@720，叠加默认 50 → 150@720 → scale=267@1280。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "远离顶部", "position": "top", "margin_top": 100},
        )
        fc = " ".join(plan.filter_complex)
        # 默认 50 + margin_top100 = 150@720 → scale=267
        assert "y=267" in fc

    def test_title_default_bold_true(self, monkeypatch):
        """不传 bold 时默认粗体：drawtext 用同色描边 borderw 模拟。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "粗体"},
        )
        fc = " ".join(plan.filter_complex)
        # bold=True 默认：黑色细描边 width=2@720 → scale=4，与 CPU vfb 一致
        assert "borderw=4" in fc
        assert "bordercolor=0x000000" in fc
        assert "text='粗体'" in fc

    def test_title_bold_false_disables_faux_bold(self, monkeypatch):
        """显式 bold=False 时不加粗描边。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "细体", "bold": False},
        )
        fc = " ".join(plan.filter_complex)
        # 无描边
        assert "borderw=" not in fc

    def test_title_position_bottom(self, monkeypatch):
        """position=bottom → y=h-th-{scaled margin}。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "底部", "position": "bottom"},
        )
        fc = " ".join(plan.filter_complex)
        # bottom margin 50@720 → scale=89
        assert "y=h-th-89" in fc

    def test_title_size_scales_by_width_not_height(self, monkeypatch):
        """不同分辨率下同 @720 基准的 size 等比缩放：1080x1920 下 36→54。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1080,
            output_height=1920,
            output_fps=30,
            title_text="竖屏标题",
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
        )
        fc = " ".join(plan.filter_complex)
        # default size 48@720 → 1080w = 72
        assert "fontsize=72" in fc
        # top margin 50@720 → 75
        assert "y=75" in fc


# ---------------------------------------------------------------------------
# 字幕：静态 subtitle_text + ASR segments
# ---------------------------------------------------------------------------
class TestSubtitlePassthrough:
    def test_static_subtitle_spans_full_duration(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(2, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True, True],
            clip_volumes=[1.0, 1.0],
            subtitle_config={"enabled": True, "text": "这是静态字幕", "color": "#00ff00"},
            static_subtitle_text="这是静态字幕",
        )
        fc = " ".join(plan.filter_complex)
        # 应出现 static 文本，且 enable 范围 0 → 4.0
        assert "text='这是静态字幕'" in fc
        assert "between(t,0.000,4.000)" in fc
        assert "fontcolor=0x00ff00" in fc

    def test_asr_segments_use_subtitle_style(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        segs = [
            _StubSeg("第一句", 0.0, 1.5),
            _StubSeg("第二句", 1.5, 3.0),
        ]
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(2, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True, True],
            clip_volumes=[1.0, 1.0],
            subtitle_segments=segs,
            subtitle_config={"enabled": True, "color": "#0000ff", "size": 28, "position": "bottom"},
        )
        fc = " ".join(plan.filter_complex)
        assert "text='第一句'" in fc
        assert "text='第二句'" in fc
        assert "fontcolor=0x0000ff" in fc
        # sub size 28@720 经 1280/720 缩放 = 50
        assert "fontsize=50" in fc
        # bottom margin 50@720 → 89
        assert "y=h-th-89" in fc

    def test_subtitle_disabled_hides_subs(self, monkeypatch):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            subtitle_config={"enabled": False, "text": "我被关了"},
            static_subtitle_text="我被关了",
        )
        fc = " ".join(plan.filter_complex)
        assert "drawtext=" not in fc

    def test_subtitle_short_hex_color(self, monkeypatch):
        """#fff → 0xffffff（缩写展开）。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            subtitle_config={"text": "短色", "color": "#fff"},
            static_subtitle_text="短色",
        )
        fc = " ".join(plan.filter_complex)
        assert "fontcolor=0xffffff" in fc


# ---------------------------------------------------------------------------
# BGM：volume / afade / adelay
# ---------------------------------------------------------------------------
class TestBGMConfigPassthrough:
    def test_bgm_volume_from_config(self, monkeypatch, tmp_path):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            bgm_audio=bgm,
            bgm_config={"volume": 0.15, "enabled": True},
        )
        # BGM 音频滤镜链必须含 volume=0.15（挑输出 label 为 [au_bgm] 的那条）
        bgm_chain = [f for f in plan.filter_complex if f.rstrip().endswith("[au_bgm]")]
        assert len(bgm_chain) == 1, bgm_chain
        assert "volume=0.150" in bgm_chain[0]

    def test_bgm_fade_in_out(self, monkeypatch, tmp_path):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(2, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True, True],
            clip_volumes=[1.0, 1.0],
            bgm_audio=bgm,
            bgm_config={"volume": 0.3, "fade_in": 1.0, "fade_out": 1.5},
        )
        bgm_chain = [f for f in plan.filter_complex if f.rstrip().endswith("[au_bgm]")][0]
        assert "afade=t=in:st=0:d=1.00" in bgm_chain
        # fade_out 起点 = total_duration - fade_out = 2.5
        assert "afade=t=out:st=2.50:d=1.50" in bgm_chain

    def test_bgm_audio_offset_adelay(self, monkeypatch, tmp_path):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            bgm_audio=bgm,
            bgm_config={"audio_offset": 2.5},
        )
        bgm_chain = [f for f in plan.filter_complex if f.rstrip().endswith("[au_bgm]")][0]
        # adelay 毫秒（2.5s → 2500），立体声双声道
        assert "adelay=2500|2500" in bgm_chain

    def test_bgm_volume_adjust_db(self, monkeypatch, tmp_path):
        """volume_adjust_db=-6dB → 增益 0.5，最终 volume 约 0.3*0.5=0.15。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            bgm_audio=bgm,
            bgm_config={"volume": 0.3, "volume_adjust_db": -6.0},
        )
        bgm_chain = [f for f in plan.filter_complex if f.rstrip().endswith("[au_bgm]")][0]
        # 0.3 * 10^(-6/20) ≈ 0.3 * 0.501 ≈ 0.150
        assert "volume=0.150" in bgm_chain

    def test_bgm_disabled_drops_bgm_even_if_path_present(self, monkeypatch, tmp_path):
        """bgm_config.enabled=False 时即使传 bgm_audio 也不挂载。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            bgm_audio=bgm,
            bgm_config={"enabled": False, "volume": 0.3},
        )
        fc = " ".join(plan.filter_complex)
        assert "au_bgm" not in fc


# ---------------------------------------------------------------------------
# extra_audio_tracks 音量透传
# ---------------------------------------------------------------------------
class TestExtraAudioVolume:
    def test_extra_audio_uses_passed_volume(self, monkeypatch, tmp_path):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        tts = tmp_path / "tts.m4a"
        tts.write_bytes(b"fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            extra_audio_tracks=[(tts, 0.7)],
        )
        # extra 音轨链应带 volume=0.7
        extras = [f for f in plan.filter_complex if "aex" in f and "volume" in f]
        assert any("volume=0.70" in e for e in extras)


# ---------------------------------------------------------------------------
# 端到端：多配置组合 → filter_complex 无语法碎片
# ---------------------------------------------------------------------------
class TestCombinedConfig:
    def test_title_static_sub_bgm_combined(self, monkeypatch, tmp_path):
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(2, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=4.0,
            clip_has_audio=[True, True],
            clip_volumes=[1.0, 1.0],
            bgm_audio=bgm,
            title_config={
                "text": "主标题",
                "color": "#ffff00",
                "position": "top",
                "size": 50,
                "stroke": {"enabled": True, "width": 2, "color": "#000000"},
            },
            subtitle_config={"text": "成片全字幕", "color": "#ffffff", "size": 24, "position": "bottom"},
            static_subtitle_text="成片全字幕",
            bgm_config={"volume": 0.2, "fade_in": 0.5, "fade_out": 1.0},
        )
        fc = " ".join(plan.filter_complex)
        # 标题：size 50@720 → 89，top margin 50@720 → 89，stroke 2@720 → 4
        assert "text='主标题'" in fc
        assert "fontcolor=0xffff00" in fc
        assert "fontsize=89" in fc
        assert "y=89" in fc
        assert "borderw=4" in fc
        # 字幕：size 24@720 → 43，bottom margin 50@720 → 89（默认不加粗）
        assert "text='成片全字幕'" in fc
        assert "fontsize=43" in fc
        assert "y=h-th-89" in fc
        assert "fontcolor=0xffffff" in fc
        # subtitle 默认 bold=False，无额外描边（用户未开 stroke）
        # BGM
        assert "volume=0.200" in fc
        assert "afade=t=in:st=0:d=0.50" in fc
        assert "afade=t=out:st=3.00:d=1.00" in fc
        # vfinal 存在
        assert "[vfinal]" in fc


# ---------------------------------------------------------------------------
# 额外边界用例
# ---------------------------------------------------------------------------
class TestEdgeCases:
    def test_invalid_color_falls_back_to_white(self, monkeypatch):
        """非法色值回退 white，不抛异常。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "T", "color": "not-a-color"},
        )
        fc = " ".join(plan.filter_complex)
        # 非法颜色不是 # 开头且不是命名，会被当命名色直接返回，不报错；确保至少 drawtext 有
        assert "drawtext=" in fc

    def test_bold_title_increases_borderw(self, monkeypatch):
        """bold=True 时若原无描边，自动加 borderw 黑色细描边模拟加粗（与 CPU vfb 一致，避免重影）。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "粗体", "bold": True, "color": "#ff0000"},
        )
        fc = " ".join(plan.filter_complex)
        # 仿粗用黑色细描边 2@720→scale=4，不跟文字色（避免同色描边重影）
        assert "borderw=4" in fc
        assert "bordercolor=0x000000" in fc

    def test_asr_and_static_subtitle_asr_wins(self, monkeypatch):
        """同时传 static_subtitle_text 和 ASR segments 时，ASR 优先（不插入静态全文）。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        segs = [_StubSeg("ASR1", 0.0, 1.0), _StubSeg("ASR2", 1.0, 2.0)]
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            subtitle_segments=segs,
            subtitle_config={"text": "静态全文", "color": "#ffffff"},
            static_subtitle_text="静态全文",
        )
        fc = " ".join(plan.filter_complex)
        assert "text='ASR1'" in fc
        assert "text='ASR2'" in fc
        # 静态全文不应该单独存在
        assert "between(t,0.000,2.000)" not in fc or "text='静态全文'" not in fc

    def test_hex_color_with_alpha(self, monkeypatch):
        """#rrggbbaa → 0xrrggbb@A 格式。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            title_config={"text": "半透明", "color": "#ff000080"},
        )
        fc = " ".join(plan.filter_complex)
        assert "fontcolor=0xff0000@" in fc

    def test_bgm_invalid_volume_clamped(self, monkeypatch, tmp_path):
        """volume 非法值回退默认 0.3；负值 clamp 到 0。"""
        import video_processing.gpu_direct_pipeline as gdp

        _patch_pipeline_helpers(monkeypatch)
        bgm = tmp_path / "bgm.mp3"
        bgm.write_bytes(b"ID3fake")
        plan = gdp.build_direct_render(
            resolved_clips=_make_clips(1, 2.0),
            output_width=1280,
            output_height=720,
            output_fps=30,
            total_duration=2.0,
            clip_has_audio=[True],
            clip_volumes=[1.0],
            bgm_audio=bgm,
            bgm_config={"volume": -999},
        )
        bgm_chain = [f for f in plan.filter_complex if f.rstrip().endswith("[au_bgm]")][0]
        assert "volume=0.000" in bgm_chain