"""Unit-Tests Renderer-Pipeline-Definitionen (PLAN.md §12, §36 Nr. 4–5)."""

from __future__ import annotations

from hms_renderer import (
    D3D11Pipeline,
    DevGLPipeline,
    build_compositor_pipeline,
    build_single_video_pipeline,
    gst_available,
)


def test_single_video_d3d11_uses_hardware_decoder_path() -> None:
    pipeline = build_single_video_pipeline("C:/clips/test.mp4", d3d11=True)
    assert "d3d11" in pipeline
    assert "d3d11videosink" in pipeline
    assert "fullscreen=true" in pipeline  # randloses Vollbild (§3.3)
    assert "uridecodebin" in pipeline


def test_single_video_devgl_marked_alternative() -> None:
    pipeline = build_single_video_pipeline("/tmp/test.mp4", d3d11=False)
    assert "d3d11" not in pipeline  # Dev-Pfad darf D3D11 nicht still nutzen
    assert "glimagesink" in pipeline


def test_compositor_d3d11_mixed_two_sources_on_gpu() -> None:
    pipeline = build_compositor_pipeline("a.mp4", "b.mp4", d3d11=True)
    # Zwei Quellen → Compositor → Ausgabe ohne CPU-Readback (§36 Nr. 5)
    assert pipeline.count("uridecodebin") == 2
    assert "d3d11compositor" in pipeline
    assert "d3d11convert" in pipeline
    assert "D3D11Memory" in pipeline  # GPU-Residenz explizit angefordert
    assert "appsink" not in pipeline  # kein CPU-Abgriff im Normalpfad
    assert "videoconvert" not in pipeline  # kein Software-Farbkonverter


def test_compositor_devgl_is_separate_path() -> None:
    pipeline = build_compositor_pipeline("a.mp4", "b.mp4", d3d11=False)
    assert "glvideomixer" in pipeline
    assert "d3d11" not in pipeline


def test_d3d11_pipeline_splits_screen_for_two_videos() -> None:
    p = D3D11Pipeline(video_a="a.mp4", video_b="b.mp4", width=1920, height=1080)
    s = p.launch_string()
    assert "sink_0::width=960" in s  # linke Hälfte
    assert "sink_1::width=960" in s  # rechte Hälfte
    assert "width=1920,height=1080" in s  # Master-Auflösung


def test_devgl_pipeline_reduced_resolution() -> None:
    p = DevGLPipeline(video_a="a.mp4", video_b="b.mp4")
    assert p.width == 960 and p.height == 540  # Dev-Pfad kleiner, gekennzeichnet


def test_gst_available_reflects_environment() -> None:
    # Im Entwicklungscontainer ist GStreamer nicht installiert → False.
    # Auf dem Windows-Ziel mit gebündelter Runtime → True. Kein Fake.
    assert isinstance(gst_available(), bool)