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using Google.Protobuf;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.DataStore;
using Tango.DataStore.Remote;
using Tango.FSE.Common.Connection;

namespace Tango.FSE.UI.DataStore
{
    public class RemoteDataStoreCollection : IDataStoreCollection
    {
        private IMachineProvider _machineProvider;

        public string Name { get; }

        public RemoteDataStoreCollection(String name, IMachineProvider machineProvider)
        {
            Name = name;
            _machineProvider = machineProvider;
        }

        public void Put<T>(string key, T value)
        {
            Put(key, (object)value);
        }

        public void Put(string key, object value)
        {
            Put(key, DataStoreHelper.GetDataType(value), value);
        }

        public void Put(string key, DataType type, object value)
        {
            if (type == DataType.Proto)
            {
                if (value is IMessage protoMessage)
                {
                    value = DataStoreProtoObject.FromMessage(protoMessage);
                }
                else
                {
                    throw new InvalidOperationException("DataType if Proto but actual message is not part of the PMR.");
                }
            }

            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStorePutRequest, RemoteDataStorePutResponse>(new RemoteDataStorePutRequest()
            {
                Collection = Name,
                DataType = type,
                Key = key,
                Value = value
            }).Result;
        }

        public T Get<T>(string key)
        {
            return (T)Convert.ChangeType(Get(key, null), typeof(T));
        }

        public T Get<T>(string key, T defaultValue)
        {
            return (T)Convert.ChangeType(Get(key, (object)defaultValue), typeof(T));
        }

        public object Get(string key)
        {
            return Get(key, null);
        }

        public object Get(string key, object defaultValue)
        {
            if (defaultValue is IMessage defaultValueMessage)
            {
                defaultValue = DataStoreProtoObject.FromMessage(defaultValueMessage);
            }

            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreGetRequest, RemoteDataStoreGetResponse>(new RemoteDataStoreGetRequest()
            {
                Collection = Name,
                Key = key,
                DefaultValue = defaultValue,
            }).Result;

            if (result.DataType == DataType.Proto)
            {
                return result.ProtoObject.Message;
            }

            return result.Value;
        }

        public List<IDataStoreItem> GetAll()
        {
            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreGetAllRequest, RemoteDataStoreGetAllResponse>(new RemoteDataStoreGetAllRequest()
            {
                Collection = Name
            }).Result;

            return result.Items.Cast<IDataStoreItem>().ToList();
        }

        public void Delete(string key)
        {
            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreDeleteRequest, RemoteDataStoreDeleteResponse>(new RemoteDataStoreDeleteRequest()
            {
                Collection = Name,
                Key = key
            }).Result;
        }

        public void DeleteAll()
        {
            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreDeleteAllRequest, RemoteDataStoreDeleteAllResponse>(new RemoteDataStoreDeleteAllRequest()
            {
                Collection = Name,
            }).Result;
        }

        public int Count()
        {
            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreCountRequest, RemoteDataStoreCountResponse>(new RemoteDataStoreCountRequest()
            {
                Collection = Name
            }).Result;

            return result.Count;
        }

        public IDataStoreItem GetItem(string key)
        {
            return GetItem(key, null);
        }

        public IDataStoreItem GetItem(string key, object defaultValue)
        {
            if (defaultValue is IMessage defaultValueMessage)
            {
                defaultValue = DataStoreProtoObject.FromMessage(defaultValueMessage);
            }

            var result = _machineProvider.MachineOperator.SendGenericRequest<RemoteDataStoreGetItemRequest, RemoteDataStoreGetItemResponse>(new RemoteDataStoreGetItemRequest()
            {
                Collection = Name,
                Key = key,
                DefaultValue = defaultValue
            }).Result;

            return result.Item;
        }

        public List<IDataStoreItem> GetUnsynchronized()
        {
            return GetAll().Where(x => !x.IsSynchronized).ToList();
        }
    }
}