using System;
using XCEngine;

namespace XCEngine.Rendering
{
    public sealed class ScriptableRenderPipelineScenePlanningContext
    {
        private readonly ulong m_nativeHandle;

        internal ScriptableRenderPipelineScenePlanningContext(
            ulong nativeHandle)
        {
            m_nativeHandle = nativeHandle;
        }

        public int requestCount =>
            InternalCalls
                .Rendering_ScriptableRenderPipelineScenePlanningContext_GetRequestCount(
                    m_nativeHandle);

        public Camera[] GetDefaultCameras()
        {
            ulong[] cameraGameObjectUUIDs =
                InternalCalls
                    .Rendering_ScriptableRenderPipelineScenePlanningContext_GetDefaultCameraGameObjectUUIDs(
                        m_nativeHandle);
            if (cameraGameObjectUUIDs == null ||
                cameraGameObjectUUIDs.Length == 0)
            {
                return Array.Empty<Camera>();
            }

            Camera[] cameras =
                new Camera[cameraGameObjectUUIDs.Length];
            for (int index = 0; index < cameraGameObjectUUIDs.Length; ++index)
            {
                ulong gameObjectUUID = cameraGameObjectUUIDs[index];
                cameras[index] =
                    gameObjectUUID != 0
                        ? new Camera(gameObjectUUID)
                        : null;
            }

            return cameras;
        }

        public bool UseDefaultRequests()
        {
            return InternalCalls
                .Rendering_ScriptableRenderPipelineScenePlanningContext_UseDefaultRequests(
                    m_nativeHandle);
        }

        public void ClearRequests()
        {
            InternalCalls
                .Rendering_ScriptableRenderPipelineScenePlanningContext_ClearRequests(
                    m_nativeHandle);
        }

        public bool AddCamera(Camera camera)
        {
            return InternalCalls
                .Rendering_ScriptableRenderPipelineScenePlanningContext_AddCamera(
                    m_nativeHandle,
                    camera != null
                        ? camera.GameObjectUUID
                        : 0);
        }
    }
}