using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Collada141;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Globalization;
using System.Xml;
using ColladaHelper;
using OpenTK;
using Toolbox.Library.Rendering;

namespace Toolbox.Library
{
    public class DAE : DAEHelper
    {
        public List<STGenericObject> objects = new List<STGenericObject>();
        public List<STGenericMaterial> materials = new List<STGenericMaterial>();
        public STSkeleton skeleton;
        public List<string> BoneNames = new List<string>();

        public bool UseTransformMatrix = true;

        Dictionary<string, Vertex> VertexSkinSources = new Dictionary<string, Vertex>();
        Dictionary<string, Matrix4> MatrixSkinSources = new Dictionary<string, Matrix4>();

        private Matrix4 GlobalTransform = Matrix4.Identity;
        public bool LoadFile(string FileName)
        {
            GlobalTransform = Matrix4.Identity;

            COLLADA collada = COLLADA.Load(FileName);
        
            //Check axis up
            if (collada.asset != null)
            {
                switch (collada.asset.up_axis)
                {
                    case UpAxisType.X_UP:
                        GlobalTransform = Matrix4.CreateRotationX(90);
                        break;
                    case UpAxisType.Y_UP:
                        GlobalTransform = Matrix4.CreateRotationY(90);
                        break;
                    case UpAxisType.Z_UP:
                        GlobalTransform = Matrix4.CreateRotationZ(90);
                        break;
                }

                if (collada.asset.unit != null)
                {
                    var amount = collada.asset.unit.meter;
                    var type = collada.asset.unit.name;
                    if (type == "meter")
                    {

                    }
                    else if (type == "centimeter")
                    {

                    }
                }
            }

            foreach (var item in collada.Items)
            {
                if (item is library_geometries)
                    LoadGeometry((library_geometries)item);
                if (item is library_images)
                    LoadImages((library_images)item);
                if (item is library_controllers)
                    LoadControllers((library_controllers)item);
                if (item is library_nodes)
                    LoadNodes((library_nodes)item);
                if (item is library_visual_scenes)
                    LoadVisualScenes((library_visual_scenes)item);
            }

            return true;
        }

        private void LoadVisualScenes(library_visual_scenes nodes)
        {

        }

        private void LoadNodes(library_nodes nodes)
        {
            
        }

        private void LoadControllers(library_controllers controllers)
        {
           
        }

        private void LoadMaterials(library_materials materials)
        {

        }

        private void LoadImages(library_images images)
        {

        }

        private void LoadGeometry(library_geometries geometries)
        {
            foreach (var geom in geometries.geometry)
            {
                var mesh = geom.Item as mesh;
                if (mesh == null)
                    continue;

                foreach (var source in mesh.source)
                {
                    var float_array = source.Item as float_array;
                    if (float_array == null)
                        continue;

                    Console.Write("Geometry {0} source {1} : ", geom.id, source.id);
                    foreach (var mesh_source_value in float_array.Values)
                        Console.Write("{0} ", mesh_source_value);
                    Console.WriteLine();
                }
            }
        }

        public bool ExportFile(string FileName, List<STGenericObject> meshes, STSkeleton skeleton = null)
        {
            return false;
        }

        private List<STGenericObject> CreateGenericObjects(string Name, library_geometries Geometries)
        {
            List<STGenericObject> objects = new List<STGenericObject>();
            foreach (var geom in Geometries.geometry)
            {
                var daeMesh = geom.Item as mesh;
                if (daeMesh == null)
                    continue;

                STGenericObject mesh = new STGenericObject();
                mesh.ObjectName = Name;

                foreach (var source in daeMesh.source)
                {
                    var float_array = source.Item as float_array;
                    if (float_array == null)
                        continue;
                }
                objects.Add(mesh);
            }
            return objects;
        }
    }
}