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

public class GlobalModManager(string modPath = "user://mods") {
    public static GlobalModManager Instance { get; } = new();
    private readonly Dictionary<string, LuaModManager> _mods = [];
    public ReadOnlyDictionary<string, LuaModManager> Mods => new(_mods);
    private readonly Dictionary<string, string> _modList = [];
    public ReadOnlyDictionary<string, string> ModList => new(_modList);
    private readonly string modPath = modPath;
    private static readonly Logging.Logger logger = Logging.GetLogger("GlobalMod");

    public void SearchAllMods(bool isFlush = false) {
        if (isFlush) {
            _modList.Clear();
        }
        if (!DirAccess.DirExistsAbsolute(modPath))
            return;

        using var dir = DirAccess.Open(modPath);
        if (dir == null) return;

        dir.ListDirBegin();
        string fileName = dir.GetNext();
        while (!string.IsNullOrEmpty(fileName)) {
            string fullPath = $"{modPath}/{fileName}";
            const string entryFileName = "main.lua";

            if (dir.CurrentIsDir() && !fileName.StartsWith('.') &&
            FileAccess.FileExists($"{fullPath}/{entryFileName}")) {
                _modList.Add($"{fullPath}/{entryFileName}", fullPath);
            }
            fileName = dir.GetNext();
        }
    }

    public void LoadAllMods(bool isFlush = false) {
        if (isFlush) {
            _mods.Clear();
        }
        foreach (var mod in _modList) {
            try {
                LoadMod(mod.Key, mod.Value);
            }
            catch (System.Exception e) {
                logger.Exception("Failed to load mod {0}", e, mod.Key);
            }
        }
    }

    public void ClearAllMods() {
        _mods.Clear();
    }

    private void LoadMod(string filePath, string modPath) {
        string _filePath = ProjectSettings.GlobalizePath(filePath);
        string _modPath = ProjectSettings.GlobalizePath(modPath);
        _mods.Add(filePath, new LuaModManager(_filePath, _modPath));
    }

    private static void SaveFile(string path, string content) {
        using var file = FileAccess.Open(path, FileAccess.ModeFlags.Write);
        file.StoreString(content);
    }

    private static string LoadFile(string path) {
        using var file = FileAccess.Open(path, FileAccess.ModeFlags.Read);
        string content = file.GetAsText();
        return content;
    }
}