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

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

    private ProgressBar _progressBar;
    private int _sceneLoaded;

    // 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");
        var 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) {
        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;
        }
    }
}