// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
//
// 本项目主要遵循 MIT 许可证和 Apache 许可证（版本 2.0）进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
//
// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动！任何基于本项目二次开发而产生的一切法律纠纷和责任，我们不承担任何责任！

using Furion.InstantMessaging;
using Microsoft.AspNetCore.SignalR;

namespace Admin.NET.Core;

/// <summary>
/// 在线用户集线器
/// </summary>
[MapHub("/hubs/onlineUser")]
public class OnlineUserHub : Hub<IOnlineUserHub>
{
    private const string GROUP_ONLINE = "GROUP_ONLINE_"; // 租户分组前缀

    private readonly SysMessageService _sysMessageService;
    private readonly IHubContext<OnlineUserHub, IOnlineUserHub> _onlineUserHubContext;

    public OnlineUserHub(SysMessageService sysMessageService,
        IHubContext<OnlineUserHub, IOnlineUserHub> onlineUserHubContext)
    {
        _sysMessageService = sysMessageService;
        _onlineUserHubContext = onlineUserHubContext;
    }

    /// <summary>
    /// 连接
    /// </summary>
    /// <returns></returns>
    public override async Task OnConnectedAsync()
    {
        var httpContext = Context.GetHttpContext();
        var userId = (httpContext.User.FindFirst(ClaimConst.UserId)?.Value).ToLong();
        var account = httpContext.User.FindFirst(ClaimConst.Account)?.Value;
        if (userId < 0 || string.IsNullOrWhiteSpace(account)) return;

        var realName = httpContext.User.FindFirst(ClaimConst.RealName)?.Value;
        var tenantId = (httpContext.User.FindFirst(ClaimConst.TenantId)?.Value).ToLong();
        var loginMode = (LoginModeEnum)(httpContext.User.FindFirst(ClaimConst.LoginMode)?.Value).ToInt();
        loginMode = loginMode == 0 ? LoginModeEnum.PC : loginMode; // 默认PC登录模式
        var device = httpContext.GetClientDeviceInfo().Trim();
        var ipAddress = httpContext.Request.Headers["X-Forwarded-For"].FirstOrDefault();

        var user = new OnlineUser
        {
            ConnectionId = Context.ConnectionId,
            UserId = userId,
            UserName = account,
            RealName = realName,
            Time = DateTime.Now,
            Ip = string.IsNullOrWhiteSpace(ipAddress) ? httpContext.GetRemoteIpAddressToIPv4(true) : ipAddress,
            Browser = httpContext.GetClientBrowser(),
            Os = httpContext.GetClientOs(),
            TenantId = tenantId,
            LoginMode = loginMode,
            Device = device
        };
        SysCacheService.HashAdd(CacheConst.KeyUserOnline, Context.ConnectionId, user);

        // 以租户Id进行分组
        var groupName = $"{GROUP_ONLINE}{user.TenantId}";
        await _onlineUserHubContext.Groups.AddToGroupAsync(Context.ConnectionId, groupName);

        // 更新在线用户列表
        var userList = SysCacheService.HashGetAll<OnlineUser>(CacheConst.KeyUserOnline).Values.Where(u => u.TenantId == tenantId).ToList();
        await _onlineUserHubContext.Clients.Groups(groupName).OnlineUserList(new OnlineUserList
        {
            RealName = user.RealName,
            Online = true,
            UserList = userList
        });
    }

    /// <summary>
    /// 断开
    /// </summary>
    /// <param name="exception"></param>
    /// <returns></returns>
    public override async Task OnDisconnectedAsync(Exception exception)
    {
        if (string.IsNullOrEmpty(Context.ConnectionId)) return;

        var user = SysCacheService.HashGetOne<OnlineUser>(CacheConst.KeyUserOnline, Context.ConnectionId);
        if (user == null) return;

        SysCacheService.HashDel<OnlineUser>(CacheConst.KeyUserOnline, Context.ConnectionId);

        // 更新在线用户列表
        var userList = SysCacheService.HashGetAll<OnlineUser>(CacheConst.KeyUserOnline).Values.Where(u => u.TenantId == user.TenantId).ToList();
        await _onlineUserHubContext.Clients.Groups($"{GROUP_ONLINE}{user.TenantId}").OnlineUserList(new OnlineUserList
        {
            RealName = user.RealName,
            Online = false,
            UserList = userList
        });
    }

    /// <summary>
    /// 强制下线
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public async Task ForceOffline(OnlineUserHubInput input)
    {
        await _onlineUserHubContext.Clients.Client(input.ConnectionId).ForceOffline("强制下线");
    }

    /// <summary>
    /// 发送信息给某人
    /// </summary>
    /// <param name="message"></param>
    /// <returns></returns>
    public async Task SendMessageToUser(MessageInput message)
    {
        await _sysMessageService.SendUser(message);
    }

    /// <summary>
    /// 发送信息给所有人
    /// </summary>
    /// <param name="message"></param>
    /// <returns></returns>
    public async Task SendMessageToAllUser(MessageInput message)
    {
        await _sysMessageService.SendAllUser(message);
    }
}