using AuroraDesk.Core.Interfaces;
using AuroraDesk.Presentation.ViewModels;
using AuroraDesk.Presentation.ViewModels.Pages;
using AuroraDesk.Presentation.Services;
using Microsoft.Extensions.DependencyInjection;
using ReactiveUI;

namespace AuroraDesk.Presentation.Extensions;

/// <summary>
/// 服务集合扩展方法（表示层）
/// </summary>
public static class ServiceCollectionExtensions
{
    /// <summary>
    /// 添加 ReactiveUI 相关服务
    /// </summary>
    /// <param name="services">服务集合</param>
    /// <returns>服务集合</returns>
    public static IServiceCollection AddReactiveUI(this IServiceCollection services)
    {
        // 注册 ReactiveUI 相关服务
        services.AddSingleton<AppViewModel>();
        services.AddSingleton<IScreen>(provider => provider.GetRequiredService<AppViewModel>());
        
        return services;
    }
    
    /// <summary>
    /// 添加 ViewModel 服务
    /// </summary>
    /// <param name="services">服务集合</param>
    /// <returns>服务集合</returns>
    public static IServiceCollection AddViewModels(this IServiceCollection services)
    {
        // 注册 PageViewModelFactory（实现 Core 层接口）
        services.AddTransient<IPageViewModelFactory, PageViewModelFactory>();
        
        // 注册所有 PageViewModel 为 Transient
        services.AddTransient<DashboardPageViewModel>();
        services.AddTransient<UsersPageViewModel>();
        services.AddTransient<SettingsPageViewModel>();
        services.AddTransient<ReportsPageViewModel>();
        services.AddTransient<HelpPageViewModel>();
        services.AddTransient<DialogHostPageViewModel>();
        services.AddTransient<IconsPageViewModel>();
        services.AddTransient<EditorPageViewModel>();
        
        // 注意：MainWindowViewModel 的注册移到主项目的 App.axaml.cs 中
        // 因为它依赖 AppViewModel，而 AppViewModel 在 AddReactiveUI() 中注册
        // 必须在 AddReactiveUI() 之后注册 MainWindowViewModel
        
        return services;
    }
}