using Microsoft.Azure.Cosmos;
using Microsoft.Azure.Cosmos.Fluent;
using System;
using System.Collections.Generic;
using System.Text;

namespace TEAMModelOS.SDK.Module.AzureCosmosDBV3
{
    public class CosmosDBV3ClientSingleton
    {
        private static string _connectionUrl;
        private static string _connectionKey;
        private static CosmosSerializer _cosmosSerializer;
        private CosmosClient CosmosClient;

        private CosmosDBV3ClientSingleton() { }



        public CosmosClient GetCosmosDBClient()
        {
            if (CosmosClient != null)
            {
                return CosmosClient;
            }
            else
            {
                getInstance(_connectionUrl, _connectionKey, _cosmosSerializer);
                return CosmosClient;
            }
        }

        public static CosmosDBV3ClientSingleton getInstance(string connectionUrl, string connectionKey, CosmosSerializer cosmosSerializer)
        {
            _connectionUrl = connectionUrl;
            _connectionKey = connectionKey;
            _cosmosSerializer = cosmosSerializer;
            if (cosmosSerializer != null && cosmosSerializer.GetType() == typeof(SystemTextJsonCosmosSerializer))
            {
                return SingletonCustomInstance.instance;
            }
            return SingletonInstance.instance;
        }

        private static class SingletonInstance
        {
            public static CosmosDBV3ClientSingleton instance = new CosmosDBV3ClientSingleton()
            {
                // CosmosClient    =new CosmosClient(_connectionUrl, _connectionKey, new CosmosClientOptions() { AllowBulkExecution = true } )
                CosmosClient = new CosmosClientBuilder(_connectionUrl, _connectionKey).
                WithBulkExecution(true).WithConnectionModeDirect()
                //WithConnectionModeDirect().
                .Build()
                //CosmosClient = new CosmosClient(_connectionUrl, _connectionKey)
            };
            //private static readonly ConnectionPolicy ConnectionPolicy = new ConnectionPolicy
            //{
            //    ConnectionMode = ConnectionMode.Direct,
            //    ConnectionProtocol = Protocol.Tcp
            //};
        }
        private static class SingletonCustomInstance
        {
            public static CosmosDBV3ClientSingleton instance = new CosmosDBV3ClientSingleton()
            {
                // CosmosClient    =new CosmosClient(_connectionUrl, _connectionKey, new CosmosClientOptions() { AllowBulkExecution = true } )
                CosmosClient = new CosmosClientBuilder(_connectionUrl, _connectionKey).
                WithBulkExecution(true).WithConnectionModeDirect().
                //WithConnectionModeDirect().
                WithCustomSerializer(_cosmosSerializer).WithThrottlingRetryOptions(TimeSpan.FromSeconds(60),50)
                .Build()
                //CosmosClient = new CosmosClient(_connectionUrl, _connectionKey)
            };
            //private static readonly ConnectionPolicy ConnectionPolicy = new ConnectionPolicy
            //{
            //    ConnectionMode = ConnectionMode.Direct,
            //    ConnectionProtocol = Protocol.Tcp
            //};
        }
    }
}