using System;
using System.Collections.Generic;
using System.Globalization;
using System.Resources;
using System.Reflection;

namespace AuroraDesk.Services
{
    /// <summary>
    /// 资源服务实现，用于管理多语言资源
    /// </summary>
    public class ResourceService : IResourceService
    {
        private readonly Dictionary<string, string> _resources;
        private CultureInfo _currentCulture;
        
        public event EventHandler<CultureInfo>? CultureChanged;
        
        public ResourceService()
        {
            _resources = new Dictionary<string, string>();
            _currentCulture = CultureInfo.CurrentCulture;
            LoadResources();
        }
        
        public string GetString(string key)
        {
            return _resources.TryGetValue(key, out var value) ? value : key;
        }
        
        public string GetString(string key, params object[] args)
        {
            var format = GetString(key);
            try
            {
                return string.Format(format, args);
            }
            catch
            {
                return format;
            }
        }
        
        public void SetCulture(CultureInfo culture)
        {
            if (_currentCulture != culture)
            {
                _currentCulture = culture;
                LoadResources();
                CultureChanged?.Invoke(this, culture);
            }
        }
        
        public CultureInfo GetCurrentCulture()
        {
            return _currentCulture;
        }
        
        private void LoadResources()
        {
            _resources.Clear();
            
            // 根据当前语言加载对应的资源
            var resourceFileName = _currentCulture.Name.StartsWith("zh") ? "Strings.zh-CN" : "Strings.en";
            
            // 这里我们使用硬编码的方式，实际项目中可以使用ResourceManager
            LoadHardcodedResources(resourceFileName);
        }
        
        private void LoadHardcodedResources(string resourceSet)
        {
            if (resourceSet == "Strings.zh-CN")
            {
                // 中文资源
                _resources["AppTitle"] = "系统管理";
                _resources["AppSubtitle"] = "Management System";
                _resources["NavDashboard"] = "仪表板";
                _resources["NavUsers"] = "用户管理";
                _resources["NavSettings"] = "系统设置";
                _resources["NavReports"] = "报表统计";
                _resources["NavHelp"] = "帮助中心";
                _resources["HeaderTitle"] = "仪表板";
                _resources["HeaderSubtitle"] = "系统概览";
                _resources["BtnRefresh"] = "刷新";
                _resources["BtnSettings"] = "设置";
                _resources["BtnMinimize"] = "最小化";
                _resources["BtnMaximize"] = "最大化";
                _resources["BtnRestore"] = "还原";
                _resources["BtnClose"] = "关闭";
                _resources["BtnCloseTab"] = "关闭标签页";
                _resources["VersionInfo"] = "版本信息";
                _resources["VersionNumber"] = "v1.0.0";
                _resources["PageDashboard"] = "仪表板";
                _resources["PageUsers"] = "用户管理";
                _resources["PageSettings"] = "系统设置";
                _resources["PageReports"] = "报表统计";
                _resources["PageHelp"] = "帮助中心";
            }
            else
            {
                // 英文资源
                _resources["AppTitle"] = "Management System";
                _resources["AppSubtitle"] = "Management System";
                _resources["NavDashboard"] = "Dashboard";
                _resources["NavUsers"] = "User Management";
                _resources["NavSettings"] = "System Settings";
                _resources["NavReports"] = "Reports";
                _resources["NavHelp"] = "Help Center";
                _resources["HeaderTitle"] = "Dashboard";
                _resources["HeaderSubtitle"] = "System Overview";
                _resources["BtnRefresh"] = "Refresh";
                _resources["BtnSettings"] = "Settings";
                _resources["BtnMinimize"] = "Minimize";
                _resources["BtnMaximize"] = "Maximize";
                _resources["BtnRestore"] = "Restore";
                _resources["BtnClose"] = "Close";
                _resources["BtnCloseTab"] = "Close Tab";
                _resources["VersionInfo"] = "Version Information";
                _resources["VersionNumber"] = "v1.0.0";
                _resources["PageDashboard"] = "Dashboard";
                _resources["PageUsers"] = "User Management";
                _resources["PageSettings"] = "System Settings";
                _resources["PageReports"] = "Reports";
                _resources["PageHelp"] = "Help Center";
            }
        }
    }
}