using System;
using System.Threading.Tasks;
using xCommons.Extensions;
using xDataService.Interfaces;
using xModels.Base;

namespace xDataService.Providers {
    public class XStringKeyGenerator : IXKeyGenerator<XBaseEntity<string>, string> {
        private readonly IXSequentialGuid sequentialGuid;

        public XStringKeyGenerator (IXSequentialGuid sequentialGuid = null) {
            this.sequentialGuid = sequentialGuid;
        }

        public async Task<string> GenerateKey (IXBaseRepository<XBaseEntity<string>, string> repository) {
            //
            await Task.CompletedTask;

            //
            if (sequentialGuid.IsNull ()) {
                return Guid.NewGuid ().ToString ();
            } else {
                return sequentialGuid.Next ().ToString ();
            }
        }

        public bool IsEmpty (string id) {
            return id.IsNullOrEmpty ();
        }
    }
}