using Godot;
using System;
using System.Collections.Generic;

/// <summary>
/// 场景加载器
/// </summary>
public partial class Loader : Control
{
	private ProgressBar _progressBar;
	private int _sceneLoaded;
	private List<string> _resToLoad = new (){
		"res://scenes/lab.tscn",
		"res://scenes/player.tscn"
	};

	// Called when the node enters the scene tree for the first time.
    /// <summary>
    /// 场景加载完成时调用
    /// </summary>
	public override void _Ready()
	{
		_progressBar = GetNode<ProgressBar>("ProgressBar");
		string nextScene = GameManager.NextScene;
		if (nextScene != null) {
			GameManager.NextScene = "res://scenes/lab.tscn";
		}
		// resToLoad.AddRange(Res.Accessory);
		// resToLoad.AddRange(Res.Body);
		// resToLoad.AddRange(Res.Eye);
		// resToLoad.AddRange(Res.Hair);
		// resToLoad.AddRange(Res.Outfit);
		// resToLoad.AddRange(Res.Smartphone);
		ResourceLoader.LoadThreadedRequest(_resToLoad[_sceneLoaded]);
		_progressBar.MaxValue = 100 * _resToLoad.Count;
		SetProcess(true);
	}

	// Called every frame. 'delta' is the elapsed time since the previous frame.
    /// <summary>
    /// 每帧更新
    /// </summary>
    /// <param name="delta">帧间隔</param>
	public override void _Process(double delta)
	{
		Godot.Collections.Array progress = new();
		switch(ResourceLoader.LoadThreadedGetStatus(_resToLoad[_sceneLoaded], progress))
		{
			case ResourceLoader.ThreadLoadStatus.InProgress:
				_progressBar.Value = 100 * _sceneLoaded + (int)((float)progress[0] * 100);
				break;
			case ResourceLoader.ThreadLoadStatus.Loaded:
				_sceneLoaded++;
				if(_sceneLoaded < _resToLoad.Count) {
					ResourceLoader.LoadThreadedRequest(_resToLoad[_sceneLoaded]);
				} else {
					SetProcess(false);
					GetTree().ChangeSceneToFile("res://scenes/lab.tscn");
				}
				break;
			default:
				GD.Print("Error loading scene: " + _resToLoad[_sceneLoaded]);
				break;
		}
	}
}