using System.Linq;
using xCommons.Extensions;
using xDataService.Configuration;
using xDataService.Constants;

namespace xDataService.Extensions {
    public static class XDataServiceConfigurationExtensions {
        /// <summary>
        /// Extract Provider enum from Provider Type ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static XDbProviders ToDbProvider (this string source) {
            //
            if (source.IsNullOrEmpty ()) {
                return XDbProviders.None;
            }

            //
            source = source.ToNormalString ();

            //
            var result = source == ProviderType.MySQL.ToNormalString () ?
                XDbProviders.MySQL :
                source == ProviderType.SQLite.ToNormalString () ?
                XDbProviders.SQLite :
                source == ProviderType.SQLServer.ToNormalString () ?
                XDbProviders.SQLServer :
                source == ProviderType.MongoDB.ToNormalString () ?
                XDbProviders.MongoDB :
                XDbProviders.None;

            //
            return result;
        }

        /// <summary>
        /// Retrieve Mongo URI from ConnectionString
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static string GetMongoDbURI (this XDataServiceConfiguration source) {
            //
            var parts = source.GetConnectionParts ();
            var result = parts
                .Where (p => p.Trim ().StartsWith ("Uri="))
                .FirstOrDefault ();
            result = result.Replace ("Uri=", "").Trim ();

            //
            return result;
        }

        /// <summary>
        /// Retrieve Mongo Database Name from Connaction string
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static string GetMongoDbDatabase (this XDataServiceConfiguration source) {
            //
            var parts = source.GetConnectionParts ();
            var result = parts
                .Where (p => p.Trim ().StartsWith ("Database="))
                .FirstOrDefault ();
            result = result.Replace ("Database=", "").Trim ();

            //
            return result;
        }

        //
        #region Private ...
        private static string[] GetConnectionParts (this XDataServiceConfiguration source) {
            //
            var result = source.ConnectionString.Split (';');

            //
            return result;
        }
        #endregion
    }
}