using BeWo.Service.ServiceUtils.Paths;
using BS.SharedLauncher.Enums;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace BeWo.Service.ServiceUtils.Update
{
    public static class UpdateConfigReader
    {
        public static Tuple<string, string> GetDefaultTenantVersion(string tenant)
        {
            var reader = new UpdateConfigReaderClient(ServerFilePaths.UpdateConfigPath, tenant);

            return new Tuple<string, string>(reader.GetDefaultVersion(), reader.GetSpecificVersion());
        }

        public static string GetValidVersion(string tenant)
        {
            var tuple = GetDefaultTenantVersion(tenant);

            return GetValidVersion(tuple.Item1, tuple.Item2);
        }

        public static string GetValidVersion(string default_version, string tenant_version)
        {
            return tenant_version ?? default_version;
        }
    }

    internal class UpdateConfigReaderClient
    {
        private XmlDocument Document { get; set; }
        private string Tenant { get; set; }

        internal UpdateConfigReaderClient(string configFilePath, string tenant)
        {
            Document = new XmlDocument();
            Document.Load(configFilePath);

            Tenant = tenant;
        }

        //public PlanerUpdateSource Source => GotSpecialVersion ? PlanerUpdateSource.SpecialVersion : PlanerUpdateSource.NewestVersion;

        public string GetSpecificVersion()
        {
            try
            {
                return Document.SelectSingleNode($"/config/versions/tenant[@id='{Tenant}']/version")?.InnerXml;
            }
            catch (Exception)
            {
                return null;
            }
        }

        public string GetDefaultVersion()
        {
            return Document.SelectSingleNode("/config/default/version").InnerXml;
        }
    }
}