using System.Threading.Tasks;
using Godot;

namespace HotFix.Scene;

/// <summary>
/// 启动主场景
/// </summary>
public partial class Main : Control
{
    /// <summary>
    /// 封面节点
    /// </summary>
    [Export] public TextureRect Cover;

    /// <summary>
    /// 加载进度条
    /// </summary>
    [Export] public ProgressBar LoadingBar;


    /// <summary>
    /// 定时器是否启动
    /// </summary>
    private bool _timerRunning = true;

    /// <summary>
    /// 初始化
    /// </summary>
    public override void _Ready()
    {
        // 设置是否运行帧更新
        ProcessMode = LoadingBar?.ProcessMode ?? ProcessModeEnum.Disabled;

        
        // 启动定时器: 测试使用
        _ = StartProgressBar();
    }

    /// <summary>
    /// 启动定时程序
    /// </summary>
    private async Task StartProgressBar()
    {
        while (_timerRunning)
        {
            // 每秒执行一次
            await ToSignal(GetTree().CreateTimer(1.0f), "timeout");
            GD.Print("tick");
            if (LoadingBar.Value < LoadingBar.MaxValue)
            {
                LoadingBar.Value++;
            }
        }
    }

    /// <summary>
    /// 游戏帧递增
    /// </summary>
    public override void _Process(double ignore)
    {
    }
}

// 在代码之中按照以下方面配置包路径目录
// 这里是直接锁定启动 exe 执行文件的根目录下附加 Game.pck
// 大型热更新包最好基于启动的目录做资源配置
ProjectSettings.LoadResourcePack(OS.GetExecutablePath().GetBaseDir().PathJoin("Game.pck"));

using System.Threading.Tasks;
using Godot;

namespace HotFix.Scene;

/// <summary>
/// 启动主场景
/// </summary>
public partial class Main : Control
{
    /// <summary>
    /// 封面节点
    /// </summary>
    [Export] public TextureRect Cover;

    /// <summary>
    /// 加载进度条
    /// </summary>
    [Export] public ProgressBar LoadingBar;


    /// <summary>
    /// 热更包的路径地址
    /// </summary>
    [Export] public string PckFilename;

    /// <summary>
    /// 加载的热更新包资源
    /// </summary>
    private PackedScene _imported = null;


    /// <summary>
    /// 定时器是否启动
    /// </summary>
    private bool _timerRunning = true;

    /// <summary>
    /// 初始化
    /// </summary>
    public override void _Ready()
    {
        // 设置是否运行帧更新
        ProcessMode = LoadingBar?.ProcessMode ?? ProcessModeEnum.Disabled;

        
        // 测试加载资源
        if (!ProjectSettings.LoadResourcePack(PckFilename))
        {
            GD.PrintErr("Resource pack not found");
        }
        else
        {
            // 加载成功就可以直接获取场景
            GD.Print("Resource pack loaded");
            
            // 注意加载的资源路径必须要和打包的时候一致 
            _imported = GD.Load<PackedScene>("res://Packages/Game/Game.tscn");
            GD.Print(_imported);
            
            // 这里应该可以打印类似 <PackedScene#-9223371998837602871>
            // 这就代表资源包加载完成可以将其挂载到场景
            // 后面定时器每秒+10进度完成之后挂载该场景
        }
        
        // 启动定时器: 测试使用
        _ = StartProgressBar();
    }

    /// <summary>
    /// 启动定时程序
    /// </summary>
    private async Task StartProgressBar()
    {
        while (_timerRunning && _imported != null)
        {
            // 每秒执行一次
            await ToSignal(GetTree().CreateTimer(1.0f), "timeout");
            GD.Print("tick");
            if (LoadingBar.Value < LoadingBar.MaxValue)
            {
                LoadingBar.Value += 10;
            }
            else
            {
                _timerRunning = false;
                GD.Print("loading bar finished");
                
                // 读条完成直接资源附加
                var instance = _imported.Instantiate();
                GetTree().Root.AddChild(instance);
                
                // 隐藏|销毁启动界面
                this.Hide();
                this.QueueFree();
            }
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace HotFix.Common;

/// <summary>
/// 包数据字段
/// JSON 序列化模式采用 Record 类型定义
/// </summary>
/// <param name="Id">对应的资源唯一标识</param>
/// <param name="Path">打包的时候写入的资源路径</param>
/// <param name="Url">远程资源包的下载地址</param>
/// <param name="Hash">远程资源包的哈希值</param>
/// <param name="Size">资源包的预估大小</param>
/// <param name="Version">资源包发布的版本号</param>
public record PackageDataRecord(
    [property: JsonPropertyName("id")] string Id,
    [property: JsonPropertyName("path")] string Path,
    [property: JsonPropertyName("url")] string Url,
    [property: JsonPropertyName("hash")] string Hash,
    [property: JsonPropertyName("size")] long Size,
    [property: JsonPropertyName("version")] string Version
)
{

    /// <summary>
    /// JSON数据转化
    /// </summary>
    /// <param name="packages">更新包列表数组对象</param>
    /// <param name="options">JSON序列化配置</param>
    /// <returns>数据包列表JSON</returns>
    public static string ToJson(List<PackageDataRecord> packages,JsonSerializerOptions options = null)
    {
        return JsonSerializer.Serialize(packages,options);
    }

    /// <summary>
    /// 将JSON数据转化成 PackageDataRecord 数组对象
    /// </summary>
    /// <param name="json">JSON字符串</param>
    /// <param name="options">JSON反序列化配置</param>
    /// <returns>PackageDataRecord列表数据</returns>
    public static List<PackageDataRecord> FromJson(string json, JsonSerializerOptions options = null)
    {
        return JsonSerializer.Deserialize<List<PackageDataRecord>>(json, options);
    }



    /// <summary>
    /// 生成测试数据包列表
    /// </summary>
    /// <returns>序列化JSON数据</returns>
    public static string TestData()
    {
        // 游戏场景数据
        var gameScene = new PackageDataRecord(
        "GAME_SCENE",
        "res://Packages/Game/Game.tscn",
        "https://cdn.example.com/assets/Game.pck",
        "63d72051e901c069f8aa1b32aa0c43bb",
        4192,
        "1.0.0");
        
        // 战斗场景数据
        var battleScene = new PackageDataRecord(
            "BATTLE_SCENE",
            "res://Packages/Battle/Battle.tscn",
            "https://cdn.example.com/assets/Battle.pck",
            "747d99f92ee9c080ba26108ac5d26488",
            8192,
            "1.0.0"
        );

        // 打包成数据列表
        var packages = new List<PackageDataRecord>
        {
            Capacity = 2
        };
        packages.Add(gameScene);
        packages.Add(battleScene);
        
        // 序列化成 JSON
        return ToJson(packages);
    }
};

// 查看测试数据时候正确, 这里没有处理 try-catch 相关, 正式功能需要做拦截处理
var json = PackageDataRecord.TestData();
var form = PackageDataRecord.FromJson(json);
GD.Print(json);
GD.Print($"Size = {form.Count}");

// 输出内容如下
// [{"id":"GAME_SCENE","path":"res://Packages/Game/Game.tscn","url":"https://cdn.example.com/assets/Game.pck","hash":"63d72051e901c069f8aa1b32aa0c43bb","size":4192,"version":"1.0.0"},{"id":"BATTLE_SCENE","path":"res://Packages/Battle/Battle.tscn","url":"https://cdn.example.com/assets/Battle.pck","hash":"747d99f92ee9c080ba26108ac5d26488","size":8192,"version":"1.0.0"}]
// Size = 2