using SharpChat.Bans;
using SharpChat.S2CPackets;
using System.Text.Json;

namespace SharpChat.ClientCommands {
    public class PardonUserClientCommand(BansClient bansClient) : ClientCommand {
        public bool IsMatch(ClientCommandContext ctx) {
            return ctx.NameEquals("pardon")
                || ctx.NameEquals("unban");
        }

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

            if(!ctx.User.Can(UserPermissions.BanUser | UserPermissions.KickUser)) {
                ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_NOT_ALLOWED, true, $"/{ctx.Name}"));
                return;
            }

            string? unbanUserTarget = ctx.Args.FirstOrDefault();
            if(string.IsNullOrWhiteSpace(unbanUserTarget)) {
                ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_FORMAT_ERROR));
                return;
            }

            string unbanUserDisplay = unbanUserTarget;
            User? unbanUser = ctx.Chat.Users.FirstOrDefault(u => u.NameEquals(unbanUserTarget));
            if(unbanUser == null && long.TryParse(unbanUserTarget, out long unbanUserId))
                unbanUser = ctx.Chat.Users.FirstOrDefault(u => u.UserId == unbanUserId.ToString());
            if(unbanUser != null) {
                unbanUserTarget = unbanUser.UserId;
                unbanUserDisplay = unbanUser.UserName;
            }

            Task.Run(async () => {
                BanInfo? banInfo = await bansClient.BanGetAsync(unbanUserTarget);
                if(banInfo?.Kind != BanKind.User) {
                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.USER_NOT_BANNED, true, unbanUserDisplay));
                    return;
                }

                if(await bansClient.BanRevokeAsync(banInfo))
                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.USER_UNBANNED, false, unbanUserDisplay));
                else
                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.USER_NOT_BANNED, true, unbanUserDisplay));
            }).Wait();
        }
    }
}