using HermesSocketServer.Models;
using ILogger = Serilog.ILogger;

namespace HermesSocketServer.Requests
{
    public class DeleteGroup : IRequest
    {
        public string Name => "delete_group";
        public string[] RequiredKeys => ["id"];
        private ILogger _logger;

        public DeleteGroup(ILogger logger)
        {
            _logger = logger;
        }

        public async Task<RequestResult> Grant(Channel channel, IDictionary<string, object> data)
        {
            var groupId = data["id"].ToString()!;

            var result = channel.Groups.Remove(groupId);
            if (result)
            {
                var permissions = channel.GroupPermissions.Get().Values
                    .Where(p => p.GroupId == groupId);

                Task? chattersSave = null;
                if (channel.Groups.Chatters.TryGetValue(groupId, out var chatters))
                {
                    var filteredChatters = chatters.Get().Values.Where(c => c.GroupId == groupId).ToArray();
                    if (filteredChatters.Any())
                    {
                        foreach (var chatter in filteredChatters)
                        {
                            var res = chatters.Remove(chatter.ChatterId.ToString());
                            if (!res)
                                _logger.Warning($"Failed to delete group chatter by id [group chatter id: {chatter.ChatterId}]");
                        }

                        chattersSave = chatters.Save();
                    }
                }

                foreach (var permission in permissions)
                {
                    var res = channel.GroupPermissions.Remove(permission.Id);
                    if (!res)
                        _logger.Warning($"Failed to delete group permission by id [group chatter id: {permission.Id}]");
                }

                if (chattersSave != null)
                    await Task.WhenAll(chattersSave, channel.GroupPermissions.Save());
                else
                    await channel.GroupPermissions.Save();
                
                if (!channel.Groups.Chatters.Remove(groupId))
                    _logger.Warning($"Failed to delete group chatters from inner store [group id: {groupId}]");

                _logger.Information($"Deleted a group by id [group id: {groupId}]");
                return RequestResult.Successful(null);
            }

            _logger.Warning($"Group Id does not exist [group id: {groupId}]");
            return RequestResult.Failed("Something went wrong when updating the cache.");
        }
    }
}