using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Assimp;
using Assimp.Configs;
using AssimpLoader;
using System.IO;
public class SceneLoader2 : MonoBehaviour {
    private const int LoaderWindowID = 1;
    private const int OutputWindowId = 2;
    private AssimpLoaderOptions _assimpLoaderOptions;
    private GameObject _rootGameObject;
    private string _supportedFileFormats;
    private bool _spin;
    private List<string> _errorList = new List<string>();
    private Vector2 _scrollPositionLoader;
    private Vector2 _scrollPositionConsole;

    protected void Awake()
    {
        LoadSupportedImportFormats();
        SetupAssimpLoader();
    }

    protected void Update() {
        if (_rootGameObject != null && _spin) {
            _rootGameObject.transform.Rotate(0f, 20f * Time.deltaTime, 0f, Space.World);
        }
    }

    protected void OnGUI()
    {
        GUILayout.Window(LoaderWindowID, new Rect(0, 0, 200, 0), WindowFunction, "Asset Loader");
        GUILayout.Window(OutputWindowId, new Rect(200, Screen.height - 200, Screen.width - 200, 200), WindowFunction, "Output");
    }

    private void SetupAssimpLoader()
    {
        _assimpLoaderOptions = new AssimpLoaderOptions() {
            DontLoadCameras = true
        };
    }

    private void LoadSupportedImportFormats()
    {
        var supportedFileFormatsArray = AssimpLoader.AssimpLoader.GetSupportedImportFormats();
        _supportedFileFormats = "Everything|*.*";
        for (var f = 0; f < supportedFileFormatsArray.Length; f++)
        {
            var supportedFileFormat = supportedFileFormatsArray[f];
            _supportedFileFormats += "|" + supportedFileFormat.Substring(1) + "|*" + supportedFileFormat;
        }
    }

    private void WindowFunction (int windowID) {
        if (windowID == LoaderWindowID) {
            GUILayout.BeginVertical();
            GUILayout.Space(20);
            if (GUILayout.Button("Load Asset")) {
                var openFileDialog = new System.Windows.Forms.OpenFileDialog();
                openFileDialog.Filter = _supportedFileFormats;
                openFileDialog.Title = "Load Asset";
                if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
                    _errorList.Clear();
                    var filename = openFileDialog.FileName;
                    if (_rootGameObject != null) {
                        DestroyImmediate(_rootGameObject);
                    }
                    var assimpLoader = new AssimpLoader.AssimpLoader();
                    //try {
                        _rootGameObject = assimpLoader.LoadFromFile(openFileDialog.FileName, _assimpLoaderOptions);
                        UnityEngine.Camera.main.FitToBounds(_rootGameObject.transform, 2f);
                        _errorList.Add("Success");
                    //} catch (System.Exception exception) {
                    //    _errorList.Add(exception.ToString());
                    //    _rootGameObject = null;
                    //}
                }
            }
            GUILayout.Space(20);
            _assimpLoaderOptions.DontLoadCameras = GUILayout.Toggle(_assimpLoaderOptions.DontLoadCameras, "Don't Load Cameras");
            _assimpLoaderOptions.DontLoadLights = GUILayout.Toggle(_assimpLoaderOptions.DontLoadLights, "Don't Load Lights");
            _spin = GUILayout.Toggle(_spin, "Spin");
            GUILayout.Space(20);
            if (_rootGameObject != null) {
                var unityAnimation = _rootGameObject.GetComponent<UnityEngine.Animation>();
                if (unityAnimation != null) {
                    GUILayout.Label("Animations");
                    if (GUILayout.Button("Stop")) {
                        unityAnimation.Stop();
                    }
                    GUILayout.Space(20);
                    _scrollPositionLoader = GUILayout.BeginScrollView(_scrollPositionLoader, GUILayout.Height(300));
                    foreach (AnimationState animationState in unityAnimation) {
                        if (GUILayout.Button(animationState.name)) {
                            unityAnimation.CrossFade(animationState.name);
                        }
                    }
                    GUILayout.EndScrollView();
                    GUILayout.Space(20);
                }
            }
            GUILayout.EndVertical();
        } else if (windowID == OutputWindowId) {
            _scrollPositionConsole = GUILayout.BeginScrollView(_scrollPositionConsole);
            foreach (var item in _errorList) {
                GUILayout.Label(item);
            }
            GUILayout.EndScrollView();
        }
    }
}