using taloyhtio.idp.parser.common.domain;
using Microsoft.Azure.CosmosDB.Table;
using Microsoft.Azure.Storage;
using Serilog;
using System;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Threading.Tasks;

namespace taloyhtio.idp.parser.common.repository
{
    public class BaseRepository<T> : IBaseRepository<T> where T : Entity
    {
        private static CloudStorageAccount CreateStorageAccountFromConnectionString(string storageConnectionString)
        {
            CloudStorageAccount storageAccount;
            try
            {
                storageAccount = CloudStorageAccount.Parse(storageConnectionString);
            }
            catch (FormatException)
            {
                Console.WriteLine("Invalid storage account information provided. Please confirm the AccountName and AccountKey are valid in the app.config file - then restart the application.");
                throw;
            }
            catch (ArgumentException)
            {
                Console.WriteLine("Invalid storage account information provided. Please confirm the AccountName and AccountKey are valid in the app.config file - then restart the sample.");
                Console.ReadLine();
                throw;
            }

            return storageAccount;
        }

        protected readonly CloudTable _table;
        protected readonly ILogger _log;
        private readonly EventsHandlerFactory _eventsFactory;

        public BaseRepository(ILogger log, string storageConnectionString, EventsHandlerFactory eventsFactory)
        {
            _log = log;
            _eventsFactory = eventsFactory;

            CloudStorageAccount storageAccount = CreateStorageAccountFromConnectionString(storageConnectionString);

            // Create a table client for interacting with the table service
            CloudTableClient tableClient = storageAccount.CreateCloudTableClient(
                new TableConnectionPolicy()
                {
                    UseDirectMode = false
                }); // new TableClientConfiguration());

            var tableName = typeof(T).Name;
            System.Attribute[] attrs = Attribute.GetCustomAttributes(typeof(T));
            if (attrs != null && attrs.Any())
            {
                var tableAttr = (attrs.FirstOrDefault() as TableAttribute);
                if (tableAttr != null)
                    tableName = tableAttr.Name;
            }
            // Create a table client for interacting with the table service 
            var table = tableClient.GetTableReference(tableName);
            if (table.CreateIfNotExists())
            {
                //Console.WriteLine("Created Table named: {0}", tableName);
            }
            else
            {
                //Console.WriteLine("Table {0} already exists", tableName);
            }

            this._table = table;
        }


        public async Task DeleteEntityAsync(T deleteEntity)
        {
            try
            {
                if (deleteEntity == null)
                {
                    throw new ArgumentNullException("deleteEntity");
                }

                if (deleteEntity.DomainEvents != null)
                {
                    foreach (var evt in deleteEntity.DomainEvents)
                    {
                        _eventsFactory.ResolveAndRun(evt);
                    }
                }

                TableOperation deleteOperation = TableOperation.Delete(deleteEntity);
                TableResult result = await _table.ExecuteAsync(deleteOperation);
            }
            catch (StorageException e)
            {
                throw e;
            }
        }

        public async Task<T> SaveChanges(T entity, bool skipEntitySaving = false)
        {
            try
            {
                if (entity.DomainEvents != null)
                {
                    foreach (var evt in entity.DomainEvents)
                    {
                        _eventsFactory.ResolveAndRun(evt);
                    }
                }

                if (skipEntitySaving)
                {
                    return entity;
                }

                _log.Information($"Start SaveChanges");
                TableOperation insertOrMergeOperation = TableOperation.InsertOrMerge(entity);
                _log.Information($"Execute the operation.");
                TableResult result = await _table.ExecuteAsync(insertOrMergeOperation);
                _log.Information($"End SaveChanges");

                return result.Result as T;
            }
            catch (StorageException e)
            {
                _log.Error($"Error SaveChanges StorageException {e.Message} {e.StackTrace} {e.InnerException}", e.Message);
                throw e;
            }
            catch (Exception e)
            {
                _log.Error($"Error SaveChanges Exception {e.Message} {e.StackTrace} {e.InnerException}", e.Message);
                throw e;
            }
        }
    }
}