using SharpChat.SockChat.S2CPackets;

namespace SharpChat.ClientCommands {
    public class DeleteChannelClientCommand : ClientCommand {
        public bool IsMatch(ClientCommandContext ctx) {
            return ctx.NameEquals("delchan") || (
                ctx.NameEquals("delete")
                && ctx.Args.FirstOrDefault()?.All(char.IsDigit) == false
            );
        }

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

            if(ctx.Args.Length < 1 || string.IsNullOrWhiteSpace(ctx.Args.FirstOrDefault())) {
                await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_FORMAT_ERROR));
                return;
            }

            string delChanName = string.Join('_', ctx.Args);
            Channel? delChan = ctx.Chat.Channels.FirstOrDefault(c => c.NameEquals(delChanName));

            if(delChan == null) {
                await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.CHANNEL_NOT_FOUND, true, delChanName));
                return;
            }

            if(!ctx.User.Can(UserPermissions.DeleteChannel) && delChan.IsOwner(ctx.User)) {
                await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.CHANNEL_DELETE_FAILED, true, delChan.Name));
                return;
            }

            await ctx.Chat.RemoveChannel(delChan);
            await ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.CHANNEL_DELETED, false, delChan.Name));
        }
    }
}