// Copyright (c) Microsoft Corporation. 
// Licensed under the MIT license. 

using System;
using System.IO;
using System.Threading.Tasks;

public class Program
{
    static void RunReduction(Simplygon.ISimplygon sg)
    {
        using (Simplygon.spSceneImporter sgSceneImporter = sg.CreateSceneImporter())
        {
            sgSceneImporter.SetImportFilePath( "../Assets/SimplygonMan/SimplygonMan.obj" );
            if(!sgSceneImporter.RunImport())
                throw new System.Exception("Failed to load SimplygonMan/SimplygonMan.obj.");
            Simplygon.spScene sgScene = sgSceneImporter.GetScene();

            // Create the reduction processor. 
            using (Simplygon.spReductionProcessor sgReductionProcessor = sg.CreateReductionProcessor())
            {
                sgReductionProcessor.SetScene( sgScene );

                using (Simplygon.spReductionSettings sgReductionSettings = sgReductionProcessor.GetReductionSettings())
                using (Simplygon.spRepairSettings sgRepairSettings = sgReductionProcessor.GetRepairSettings())
                {
                    // Set reduction target to triangle ratio with a ratio of 50%. 
                    sgReductionSettings.SetReductionTargets( Simplygon.EStopCondition.All, true, false, false, false );
                    sgReductionSettings.SetReductionTargetTriangleRatio( 0.5f );

                    // The number of repair passes. Higher value is slower but give better quality. 
                    sgRepairSettings.SetProgressivePasses( 3 );

                    // Enable vertex welding. 
                    sgRepairSettings.SetUseWelding( true );
                    sgRepairSettings.SetWeldDist( 0.0f );

                    // Remove T-junktions. 
                    sgRepairSettings.SetUseTJunctionRemover( true );
                    sgRepairSettings.SetTJuncDist( 0.0f );

                    // No restriction to the weld process. 
                    sgRepairSettings.SetWeldOnlyBetweenSceneNodes( false );
                    sgRepairSettings.SetWeldOnlyBorderVertices( false );
                    sgRepairSettings.SetWeldOnlyWithinMaterial( false );
                    sgRepairSettings.SetWeldOnlyWithinSceneNode( false );

                }
                // Start the reduction process. 
                sgReductionProcessor.RunProcessing();

            }
            using (Simplygon.spSceneExporter sgSceneExporter = sg.CreateSceneExporter())
            {
                sgSceneExporter.SetScene(sgScene);
                sgSceneExporter.SetExportFilePath( "ReductionOutput.fbx" );
                if(!sgSceneExporter.RunExport())
                    throw new System.Exception("Failed to save ReductionOutput.fbx.");

            }
        }
    }
    static void Main(string[] args)
    {
        using (var sg = Simplygon.Loader.InitSimplygon(out var errorCode, out var errorMessage))
        {
            if (errorCode != Simplygon.EErrorCodes.NoError)
                return;
            RunReduction(sg);
        }
    }
}