using Microsoft.Azure.Cosmos.Table;
using Microsoft.Azure.Cosmos.Table.Queryable;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Linq;

namespace TEAMModelOS.SDK.DI
{
    public static class AzureStorageTableExtensions
    {

        #region CloudTable 批次操作    

        /// <summary>
        /// 批次新增資料至Table儲存區。
        /// </summary>
        /// <param name="entities">欲快取的集合</param>
        /// <returns></returns>
        public static async Task<TableBatchResult> BatchInsertAsync<T>(this CloudTable table, IEnumerable<T> entities) where T : ITableEntity, new()
        {
            TableBatchOperation batchOperation = new TableBatchOperation();
            foreach (var cache in entities)
            {
                batchOperation.Insert(cache);
            }

            return await table.ExecuteBatchAsync(batchOperation);
        }

        #endregion

        #region CloudTable Get

        /// <summary>
        /// (同步)取得 table 中指定 PartitionKey 的所有集合。
        /// </summary>
        /// <returns></returns>
        public static IEnumerable<T> Get<T>(this CloudTable table, string partitionKey) where T : ITableEntity, new()
        {
            TableQuery<T> query = new TableQuery<T>().Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey));
            return table.ExecuteQuery(query);
        }

        /// <summary>
        /// (同步)取得指定 PartitionKey與 RowKey 的數據，效能：點查詢，最佳。
        /// </summary>
        /// <typeparam name="T">T</typeparam>       
        /// <param name="partitionKey">PartitionKey</param>   
        /// <param name="rowKey">RowKey</param>  
        /// <returns></returns>
        public static T Get<T>(this CloudTable table, string partitionKey, string rowKey) where T : ITableEntity, new()
        {
            TableOperation retrieveOperation = TableOperation.Retrieve<T>(partitionKey, rowKey);
            var retrieveResult = table.Execute(retrieveOperation);
            if (retrieveResult.Result != null)
            {
                //DynamicTableEntityJsonSeria1lizer
                return (T)retrieveResult.Result;
            }
            else
            {
                return default(T);
            }
        }

        public static DynamicTableEntity Get(this CloudTable table, string partitionKey, string rowKey)
        {
            TableOperation retrieveOperation = TableOperation.Retrieve(partitionKey, rowKey);
            var retrieveResult = table.Execute(retrieveOperation);
            if (retrieveResult.Result != null)
            {
                return retrieveResult.Result as DynamicTableEntity;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 取得指定 PartitionKey 的所有集合(分頁)，效能：範圍查詢，次佳。
        /// </summary>
        /// <typeparam name="T">T</typeparam>       
        /// <param name="partitionKey">PartitionKey</param>
        /// <param name="takeCount">指定每次返回數量</param>
        /// <param name="specifyPropertys">指定只須返回的屬性，效能：伺服器端預測，降低延遲和成本</param>
        /// <param name="onProgress">要返回集合的委派</param>
        /// <param name="ct">CancellationToken</param>
        /// <returns></returns>
        public static async Task GetAsync<T>(this CloudTable table, string partitionKey, int? takeCount = null, List<string> specifyPropertys = null, Action<IList<T>> onProgress = null, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
        {
            TableQuery<T> tableQuery = null;
            TableContinuationToken token = null;
            var filter = TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey);

            if (specifyPropertys != null)
                tableQuery = new TableQuery<T>().Where(filter).Select(specifyPropertys);
            else
                tableQuery = new TableQuery<T>().Where(filter);

            if (takeCount != null) tableQuery.TakeCount = takeCount;

            do
            {
                var queryResponse = await table.ExecuteQuerySegmentedAsync(tableQuery, token);
                token = queryResponse.ContinuationToken;
                onProgress?.Invoke(queryResponse.Results);
            } while (token != null && !ct.IsCancellationRequested);
        }

        /// <summary>
        /// 取得指定 PartitionKey 的所有集合，效能：範圍查詢，次佳。
        /// </summary>
        /// <typeparam name="T">T</typeparam>       
        /// <param name="partitionKey">PartitionKey</param>
        /// <param name="takeCount">指定每次返回數量</param>
        /// <param name="specifyPropertys">指定只須返回的屬性，效能：伺服器端預測，降低延遲和成本</param>
        /// <param name="onProgress">要返回集合的委派</param>
        /// <param name="ct">CancellationToken</param>
        /// <returns></returns>
        public static async Task<IEnumerable<T>> GetAsync<T>(this CloudTable table, string partitionKey, int? takeCount = null, List<string> specifyPropertys = null, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
        {
            TableQuery<T> tableQuery = null;
            TableContinuationToken token = null;
            var filter = TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey);

            if (specifyPropertys != null)
                tableQuery = new TableQuery<T>().Where(filter).Select(specifyPropertys);
            else
                tableQuery = new TableQuery<T>().Where(filter);

            if (takeCount != null) tableQuery.TakeCount = takeCount;
            var items = new List<T>();

            do
            {
                var queryResponse = await table.ExecuteQuerySegmentedAsync(tableQuery, token);
                token = queryResponse.ContinuationToken;
                items.AddRange(queryResponse.Results);
            } while (token != null && !ct.IsCancellationRequested);
            return items;
        }

        /// <summary>
        /// 傳回指定partitionKey的Count數量
        /// </summary>        
        /// <param name="partitionKey"></param>
        /// <returns></returns>
        public static int GetCount(this CloudTable table, string partitionKey)
        {           

            TableQuery query = new TableQuery().Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey)).Select(new List<string> { "PartitionKey" });
            var queryResponse = table.ExecuteQuery(query).ToList();
            return queryResponse.Count();
        }



        #endregion

        #region CloudTable Get All
        /// <summary>
        /// (同步)取得 table 的所有集合，效能：資料表掃描，不佳。
        /// </summary>
        /// <returns></returns>
        public static IEnumerable<T> GetAll<T>(this CloudTable table) where T : ITableEntity, new()
        {
            return table.ExecuteQuery(new TableQuery<T>());
        }

        /// <summary>
        /// 取得 table 的所有集合(分頁)，效能：資料表掃描，不佳。
        /// </summary>
        /// <param name="takeCount">指定每次返回數量</param>
        /// <param name="specifyPropertys">指定只須返回的屬性，效能：伺服器端預測，降低延遲和成本</param>
        /// <param name="onProgress">要返回集合的委派</param>
        /// <returns></returns>        
        public static async Task GetAllAsync<T>(this CloudTable table, int? takeCount = null, List<string> specifyPropertys = null, Action<IList<T>> onProgress = null, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
        {
            TableContinuationToken token = null;
            TableQuery<T> tableQuery = new TableQuery<T>();
            if (specifyPropertys != null)
                tableQuery = new TableQuery<T>().Select(specifyPropertys);
            else
                tableQuery = new TableQuery<T>();
            if (takeCount != null) tableQuery.TakeCount = takeCount;
            var items = new List<T>();

            do
            {
                var queryResponse = await table.ExecuteQuerySegmentedAsync(tableQuery, token);
                token = queryResponse.ContinuationToken;
                items.AddRange(queryResponse.Results);
                onProgress?.Invoke(queryResponse.Results);
            } while (token != null && !ct.IsCancellationRequested);
        }

        /// <summary>
        /// 取得 table 的所有集合，效能：資料表掃描，不佳。
        /// </summary>
        /// <param name="takeCount">指定每次返回數量</param>
        /// <param name="specifyPropertys">指定只須返回的屬性，效能：伺服器端預測，降低延遲和成本</param>       
        /// <returns></returns>        
        public static async Task<IEnumerable<T>> GetAllAsync<T>(this CloudTable table, int? takeCount = null, List<string> specifyPropertys = null, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
        {
            TableContinuationToken token = null;
            TableQuery<T> tableQuery = new TableQuery<T>();
            if (takeCount != null) tableQuery.TakeCount = takeCount;
            if (specifyPropertys != null)
                tableQuery = new TableQuery<T>().Select(specifyPropertys);
            else
                tableQuery = new TableQuery<T>();
            var items = new List<T>();

            do
            {
                var queryResponse = await table.ExecuteQuerySegmentedAsync(tableQuery, token);
                token = queryResponse.ContinuationToken;
                items.AddRange(queryResponse.Results);
            } while (token != null && !ct.IsCancellationRequested);
            return items;
        }
        #endregion



    }
}