using FastReport.Utils;
using System.Text;
using System;
using FastReport.Auth;

namespace FastReport.Cloud.FastReport
{
    public sealed class FRCloudOptions
    {

        public static FRCloudOptions Instance { get; } = new FRCloudOptions();

        private const string DefaultBackendHost = "https://fastreport.cloud";

        internal string BackendHost { get; set; } = DefaultBackendHost;

        public void ResetBackendHostAndApiKey()
        {
            XmlItem xi = Config.Root.FindItem("Auth").FindItem("ConnectionInfo");
            string serverFromConfig = xi.GetProp("Server");
            string apiKeyFromConfig = GetDecodedString(xi.GetProp("ApiKey"));

            if (serverFromConfig != string.Empty && apiKeyFromConfig != string.Empty)
            {
                Instance.BackendHost = serverFromConfig;
                AuthService.Instance.User.ApiKey = apiKeyFromConfig;
            }
            else
            {
                SetDefaultBackendHost();
            }

            AuthService.Instance.Settings.Host = Res.Get("Forms,AccountWindow,AuthServer");
        }
        internal void SaveCustomServerInfo()
        {
            XmlItem xi = Config.Root.FindItem("Auth").FindItem("ConnectionInfo");

            var server = BackendHost;
            var encodedApi = GetEncodedString(AuthService.Instance.User.ApiKey);

            xi.SetProp("Server", server);
            xi.SetProp("ApiKey", encodedApi);
        }

        internal void DeleteCustomServerInfo()
        {
            XmlItem xi = Config.Root.FindItem("Auth").FindItem("ConnectionInfo");
            xi.ClearProps();
            xi.Clear();
        }

        internal string GetEncodedString(string str)
        {
            var encoded = Convert.ToBase64String(Encoding.UTF8.GetBytes(str));
            return encoded;
        }

        internal string GetDecodedString(string str)
        {
            var decoded = Encoding.UTF8.GetString(Convert.FromBase64String(str));
            return decoded;
        }

        internal void SetDefaultBackendHost()
        {
            BackendHost = Res.Get("Forms,ServerWindow,DefaultServerHost");
        }
    }
}