// Copyright Epic Games, Inc. All Rights Reserved.

using System;
using System.IO;
using UnrealBuildTool;

public class GstLib : ModuleRules
{
  public GstLib(ReadOnlyTargetRules Target) : base(Target)
  {
    Type = ModuleType.External;

    LoadGstLib(Target);
  }

  public bool LoadGstLib(ReadOnlyTargetRules Target)
  {
    string GstRoot = Environment.GetEnvironmentVariable("GSTREAMER_1_0_ROOT_MSVC_X86_64");
    bool isLibrarySupported = (GstRoot != null && Target.Platform == UnrealTargetPlatform.Win64);

    if (isLibrarySupported)
    {
      // add Gstreamer libraries
      string[] GstLibs = Directory.GetDirectories(Path.Combine(GstRoot, "lib"), "*lib");
      foreach (string curLib in GstLibs)
      {
        PublicAdditionalLibraries.Add(curLib);
      }

      // add Gstreamer include directories
      PublicIncludePaths.Add(Path.Combine(GstRoot, "include", "gstreamer-1.0"));
      PublicIncludePaths.Add(Path.Combine(GstRoot, "include", "glib-2.0"));
      PublicIncludePaths.Add(Path.Combine(GstRoot, "include", "libxml2"));
      PublicIncludePaths.Add(Path.Combine(GstRoot, "lib", "glib-2.0", "include"));
      PublicIncludePaths.Add(Path.Combine(GstRoot, "lib", "gstreamer-1.0", "include"));

      // now add own library using the gstreamer thingies to decode on gpu
      PublicAdditionalLibraries.Add(Path.Combine(ModuleDirectory, "GstLib/lib/gst_lib.lib"));
      PublicIncludePaths.Add(Path.Combine(ModuleDirectory, "GstLib/include"));
    }

    return isLibrarySupported;
  }
}