using SharpChat.SockChat.PacketsS2C;
using System.Linq;

namespace SharpChat.SockChat.Commands {
    public class WhoisCommand : ISockChatClientCommand {
        public bool IsMatch(SockChatClientCommandContext ctx) {
            return ctx.NameEquals("ip")
                || ctx.NameEquals("whois");
        }

        public void Dispatch(SockChatClientCommandContext ctx) {
            if(!ctx.User.Permissions.HasFlag(UserPermissions.SeeIPAddress)) {
                ctx.Chat.SendTo(ctx.User, new CommandNotAllowedErrorS2CPacket(ctx.Name));
                return;
            }

            string ipUserStr = ctx.Args.FirstOrDefault() ?? string.Empty;
            UserInfo? ipUser;

            (string name, UsersContext.NameTarget target) = SockChatUtility.ExplodeUserName(ipUserStr);
            if(string.IsNullOrWhiteSpace(name) || (ipUser = ctx.Chat.Users.Get(name: name, nameTarget: target)) == null) {
                ctx.Chat.SendTo(ctx.User, new UserNotFoundErrorS2CPacket(ipUserStr));
                return;
            }

            foreach(string remoteAddr in ctx.Chat.Connections.GetUserRemoteAddresses(ipUser))
                ctx.Chat.SendTo(ctx.User, new WhoisResponseS2CPacket(ipUser.UserName, remoteAddr));
        }
    }
}