using SharpChat.Events;
using SharpChat.SockChat.S2CPackets;

namespace SharpChat.ClientCommands;

public class WhisperClientCommand : ClientCommand {
    public bool IsMatch(ClientCommandContext ctx) {
        return ctx.NameEquals("whisper")
            || ctx.NameEquals("msg");
    }

    public async Task Dispatch(ClientCommandContext ctx) {
        long msgId = ctx.Chat.RandomSnowflake.Next();

        if(ctx.Args.Length < 2) {
            await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_FORMAT_ERROR));
            return;
        }

        string whisperUserStr = ctx.Args.FirstOrDefault() ?? string.Empty;
        User? whisperUser = ctx.Chat.Users.FirstOrDefault(u => u.NameEquals(whisperUserStr));

        if(whisperUser == null) {
            await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.USER_NOT_FOUND, true, whisperUserStr));
            return;
        }

        if(whisperUser == ctx.User)
            return;

        await ctx.Chat.DispatchEvent(new MessageCreateEvent(
            msgId,
            User.GetDMChannelName(ctx.User, whisperUser),
            ctx.User.UserId,
            ctx.User.UserName,
            ctx.User.Colour,
            ctx.User.Rank,
            ctx.User.NickName,
            ctx.User.Permissions,
            DateTimeOffset.Now,
            string.Join(' ', ctx.Args.Skip(1)),
            true, false, false
        ));
    }
}