using DocumentFormat.OpenXml.Drawing.Charts;
using Microsoft.AspNetCore.Mvc;
using NPOI.SS.Formula.Functions;
using Sarand.BusinessMgr.Net.Standard.Base.Bus.Control;
using Sarand.BusinessMgr.Net.Standard.Dbas.Consoles;
using Sarand.BusinessMgr.Web.Control.Components;
using Sarand.BusinessMgr.Web.Control.Consoles;
using Sarand.BusinessMgr.Web.Control.Models.Instance;
using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Dbas;
using Sarand.Net.Standard.Base.Utils;
using Sarand.Net.Standard.Dbas.Base;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Sarand.BusinessMgr.Web.Control.Controllers.Instance
{
	//=======================================================================
	partial class RepositoryDatabaseController
	{
		//-------------------------------------------------------------------
		// Definitions.

		// Core Database Table list data.
		private class TableListData : AjaxResponse_Data.ItemData_Base
		{
			public String SchemaName { get; set; }
			public String TableName { get; set; }
			public long? ColumnCount { get; set; }
			public long? IndexCount { get; set; }
			public long? RowCount { get; set; }
		}

		//-------------------------------------------------------------------
		// Get Core Database Table list ajax request.
		//-------------------------------------------------------------------
		private class AjaxResponse_RepositoryTableList : AjaxResponse_Data
		{
			// Construction.
			public AjaxResponse_RepositoryTableList(SbmModel_Control model) : base(model) { }
			// Table list.
			public List<TableListData> Tables { get; } = new List<TableListData>();
		}
		//-------------------------------------------------------------------
		[HttpPost]
		[Route("Instance/Repository/Ajax/GetTableList")]
		[Route("Instance/Repository/Ajax/GetTables")]
		public IActionResult Ajax_GetTableList(Model_RepositoryDatabase model)
		{
			String messageTitle = Localiser["label.database"];
			AjaxResponse_RepositoryTableList responseData = new AjaxResponse_RepositoryTableList(model);

			// Validate session and referrer.
			if (!ValidReferer) return Forbid();
			if (!ValidUserSession) return GetAjaxResult_InvalidSession(responseData);
			RefreshModel(model);

			// Record disposable items as they are created so all can be disposed when needed.
			using (DisposableCollection<ISacsDisposable> disposables = new DisposableCollection<ISacsDisposable>())
			{

				// Validate Repository.
				SessionData_Control.Profile.Filter.RepositoryContext = model.DatabaseFilter.Context;
				if (StringUtil.IsBlank(model.DatabaseFilter.Context))
				{
					SaLogger.Warn($"{SysUtil.Fn} Repository Context not supplied.");
					return Json(responseData.SetMessage(messageTitle, Localiser["msg.error.system"]));
				}
				SbmcRepository repository = ControlInstanceMgr.GetRepositoryByContext(model.DatabaseFilter.Context);
				if (repository == null)
				{
					SaLogger.Warn($"{SysUtil.Fn} Repository does not exist. Context: {model.DatabaseFilter.Context}.");
					return Json(responseData.SetMessage(messageTitle, Localiser["msg.error.system"]));
				}

				// Repository Console.
				SbmCoreInstanceConsole_Control instanceConsole = new SbmCoreInstanceConsole_Control(SessionData_Control, repository);
				disposables.Add(instanceConsole);

				// Columns.
				String colSchemaName = "SchemaName";
				String colTableName = "TableName";
				String colColumnCount = "ColumnCount";
				String colIndexCount = "IndexCount";
				String colRowCount = "RowCount";

				// Table filter.
				List<String> filter = new List<string>();
				if (!StringUtil.IsBlank(model.DatabaseFilter.Search))
					filter.Add($"tbl.name Like '%{DbQuery.FormatForLike(model.DatabaseFilter.Search)}%'");
				if (!filter.Any()) filter.Add("1=1");

				// Construction query.
				List<String> sql = new List<string>()
				{
					$"Select Top 2000",
					$"[{colSchemaName}]=sch.name, [{colTableName}]=tbl.name,",
					$"[{colColumnCount}]=(Select Count(*) From sys.columns col Where col.object_id=tbl.object_id),",
					$"[{colIndexCount}]=(Select Count(*) From sys.indexes idx Where idx.object_id=tbl.object_id),",
					$"[{colRowCount}]=(Select Sum(ptn.rows) From sys.partitions ptn Where ptn.object_id=tbl.object_id And ptn.index_id<2)",
					$"From sys.tables tbl",
					$"Left Join sys.schemas sch On sch.schema_id=tbl.schema_id",
 					$"Where tbl.type='U' And {filter.Concat(" And ","(",")")}",
					$"Order By tbl.name, sch.name;"
				};

				// Query items.
				using (DbResultSet resultSet = instanceConsole.Database.ExecuteQuery(String.Join("\n", sql)))
				{
					while (resultSet != null && resultSet.HasRows && resultSet.NextRecord())
					{
						NamedValue.Map values = resultSet.GetRecordValues();
						TableListData tableData = new TableListData()
						{
							SchemaName = values.GetString(colSchemaName),
							TableName = values.GetString(colTableName),
							ColumnCount = values.GetLong(colColumnCount),
							IndexCount = values.GetLong(colIndexCount),
							RowCount = values.GetLong(colRowCount),
						};
						responseData.Tables.Add(tableData);
					}
				}
				if (model.Paging.IsPaged)
					model.Paging.ItemCount = (ushort)responseData.Tables.Count;
			}

			// Complete response.
			responseData.SetPaging(model);
			responseData.Success = true;
			return Json(responseData);
		}

		//-------------------------------------------------------------------
		// Populate Repository Database Indices ajax request.
		//-------------------------------------------------------------------
		private class AjaxResponse_RepositoryIndexPopulation : AjaxResponse_Data
		{
			// Construction.
			public AjaxResponse_RepositoryIndexPopulation(SbmModel_Control model) : base(model) { }
			// Stats.
			public class StatsData
			{
				public int? PrimaryIndicesCreated { get; set; }
				public int? IndicesCreated { get; set; }
				public int? IndicesDropped { get; set; }
			}
			public StatsData Stats { get; } = new StatsData();
		}
		//-------------------------------------------------------------------
		[HttpPost]
		[Route("Instance/Repository/Ajax/PopulateIndices")]
		public IActionResult Ajax_PopulateRepositoryDatabaseIndices(Model_RepositoryDatabase model)
		{
			String messageTitle = Localiser["label.database"];
			AjaxResponse_RepositoryIndexPopulation responseData = new AjaxResponse_RepositoryIndexPopulation(model);

			// Validate session and referrer.
			if (!ValidReferer) return Forbid();
			if (!ValidUserSession) return GetAjaxResult_InvalidSession(responseData);
			RefreshModel(model);

			// Record disposable items as they are created so all can be disposed when needed.
			using (DisposableCollection<ISacsDisposable> disposables = new DisposableCollection<ISacsDisposable>())
			{

				// Validate Repository.
				SessionData_Control.Profile.Filter.RepositoryContext = model.DatabaseFilter.Context;
				if (StringUtil.IsBlank(model.DatabaseFilter.Context))
				{
					SaLogger.Warn($"{SysUtil.Fn} Repository Context not supplied.");
					return Json(responseData.SetMessage(messageTitle, Localiser["msg.error.system"]));
				}
				SbmcRepository repository = ControlInstanceMgr.GetRepositoryByContext(model.DatabaseFilter.Context);
				if (repository == null)
				{
					SaLogger.Warn($"{SysUtil.Fn} Repository does not exist. Context: {model.DatabaseFilter.Context}.");
					return Json(responseData.SetMessage(messageTitle, Localiser["msg.error.system"]));
				}

				// Repository Console.
				SbmCoreInstanceConsole_Control instanceConsole = new SbmCoreInstanceConsole_Control(SessionData_Control, repository);
				disposables.Add(instanceConsole);

				SbmDatabaseConsole dbConsole = new SbmDatabaseConsole(instanceConsole.Internals.SessionContext);

				// Populate indices.
				SaLogger.Info($"{SysUtil.Fn} Populating indices for Repository Context '{model.DatabaseFilter.Context}'.", true);
				SacsDatabaseConsole.IndexStats indexStats = new SacsDatabaseConsole.IndexStats();
				dbConsole.InstallDbIndices(indexStats);
				if (dbConsole.HasErrorState())
					return Json(responseData.SetMessage(messageTitle, $"Error encountered: {dbConsole.ErrorStateMessage.Trim('.')}."));

				// Statistics.
				if (indexStats.PrimaryIndicesCreated > 0)
					responseData.Stats.PrimaryIndicesCreated = indexStats.PrimaryIndicesCreated;
				if (indexStats.IndicesCreated > 0)
					responseData.Stats.IndicesCreated = indexStats.IndicesCreated;
				if (indexStats.IndicesDropped > 0)
					responseData.Stats.IndicesDropped = indexStats.IndicesDropped;
				List<String> statsOutput = new List<string>();
				if (indexStats.PrimaryIndicesCreated > 0)
					statsOutput.Add($"Primary Created: {indexStats.PrimaryIndicesCreated}.");
				if (indexStats.IndicesCreated > 0)
					statsOutput.Add($"Indices Created: {indexStats.IndicesCreated}.");
				if (indexStats.IndicesDropped > 0)
					statsOutput.Add($"Indices dropped: {indexStats.IndicesDropped}.");
				responseData.SetMessage(messageTitle, $"Indices populated.\n{statsOutput.Concat("", "\n")}");
			}

			// Complete response.
			responseData.Success = true;
			return Json(responseData);
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}