using System;
using System.Collections.Concurrent;
using System.Linq;

namespace WingNotificationModule.Channel.WebSocket
{
    public class ApplyWSToken : IApplyToken
    {
        private ConcurrentDictionary<string, WSTokenInfo> _tokenDic = new();

        /// <summary>
        /// Generate token
        /// </summary>
        /// <param name="clientIpAndPort"></param>
        /// <param name="clientDeviceId"></param>
        /// <param name="clientSource"></param>
        /// <returns>token</returns>
        public string GenerateToken(string clientIpAndPort, string clientDeviceId, string clientSource)
        {
            string token = GetTokenByDeviceId(clientDeviceId);
            if (string.IsNullOrWhiteSpace(token))
            {
                token = Guid.NewGuid().ToString("N");
                var tokenInfo = new WSTokenInfo
                {
                    Token = token,
                    ClientSource = clientSource,
                    ClientDeviceId = clientDeviceId,
                    ClientIpAndPort = clientIpAndPort
                };
                _tokenDic.AddOrUpdate(token, tokenInfo, (k, v) => tokenInfo);
            }
            return token;
        }

        /// <summary>
        /// Get token by device id
        /// </summary>
        /// <param name="clientDeviceId"></param>
        /// <returns></returns>
        public string GetTokenByDeviceId(string clientDeviceId)
        {
            return _tokenDic.Values.FirstOrDefault(ws => ws.ClientDeviceId == clientDeviceId)?.Token;
        }

        /// <summary>
        /// Validate token
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        public bool ValidateToken(string token)
        {
            return _tokenDic.TryGetValue(token, out _);
        }
    }
}