using Sarand.Core.Base;
using Sarand.Core.Bus;
using Sarand.Core.IO;
using Sarand.Win.Dbas.Base;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace Sarand.PatientMgr.Win.Dbas.Utils
{
	//=======================================================================
	public static class SpmDbDfnGenerator
	{
		//-------------------------------------------------------------------
		// Definitions.
		public class DbDfnGeneratorResultData
		{
			public bool Success { get; internal set; }
			public String ErrorMessage { get; internal set; }
		}

		//-------------------------------------------------------------------
		// Data members.
		//private static string messageBoxTitle = "PatientMgr database definition generator";

		//-------------------------------------------------------------------
		/// <summary>Generate database definitions.</summary>
		public static DbDfnGeneratorResultData Generate (String connectionString)
		{
			DbDfnGeneratorResultData resultData = new DbDfnGeneratorResultData();

			// Locate output folder:
			String directory = GetOutputFolder(resultData);
			if (String.IsNullOrEmpty(directory) || !FileUtil.IsDirectory(directory)) return resultData;

			// Open database.
			// NB Must be ODBC connection - especially to retrieve index columns.
			SacsDatabaseConsole.OdbcConfig config = new SacsDatabaseConsole.OdbcConfig();
			config.connectionString = connectionString;
			SacsDatabase database = SacsDatabaseConsole.OpenOdbcDatabase(config);

			// Generate database definition:
			GenerateDatabaseDefinition(database, directory, resultData);
			return resultData;
		}

		//-------------------------------------------------------------------
		private static bool GenerateDatabaseDefinition (SacsDatabase database, String directory, DbDfnGeneratorResultData resultData)
		{

			DatabaseDefinitionGenerator.Config config = new DatabaseDefinitionGenerator.Config();
			config.Database = database;
			config.OutputDirectory = directory;
			config.Namespace_DatabaseDefinition = "Sarand.PatientMgr.Core.App";
			config.Namespace_TableObjects = "Sarand.PatientMgr.Win.Dbas.Internal";
			config.Classname_DatabaseDefinition = "SpmDbDfn";
			config.Tables_Excluded.AddRange(new String[] { "NextId", "SaCode", "SaCodeType", "SaSecItem", "SaSecurityItem", "SaSecLink", "SaSecurityLink", "SaItemData", "SaItemDoc", "SaItemOption", "SaInterface", "SaInterfaceProcess", "SaInterfaceProcessMessage", "SaInterfaceDataItem", "SaInterfaceProcessDataItem", "SaAttrUpdate" });
			// Columns to exclude from update.
			config.InsertOnlyColumns.Add(".*", "CreateOn,CreateBy,CreateHost");
			// Table class.
			config.TableClass.Namespace_BaseClass = "Sarand.PatientMgr.Win.Dbas.Data";
			config.TableClass.BaseClass = "SpmDbDataItem";
			config.TableClass.MandatoryConstructorDbInfo = true;
			// Generate database definition.
			DatabaseDefinitionGenerator generator = new DatabaseDefinitionGenerator();
			resultData.Success = generator.Generate(config);
			return resultData.Success;
		}

		//-------------------------------------------------------------------
		private static String GetOutputFolder (DbDfnGeneratorResultData resultData)
		{
			String fn = "SpmDbDfnGenerator.GetOutputFolder";
			String assemblyDirectory = FileUtil.GetParentDirectory((Assembly.GetAssembly(typeof(DatabaseDefinitionGenerator)).Location));
			String directory = assemblyDirectory;
			Logger.Debug(fn + " Assembly folder: " + directory);
			// Locate the parent of the 'Workspace' solution root folder.
			String projectFolder = "Workspace";
			while (!String.IsNullOrEmpty(directory))
			{
				if (FileUtil.IsDirectory(directory + Path.DirectorySeparatorChar + projectFolder))
				{
					break;
				}
				directory = FileUtil.GetParentDirectory(directory);
			}
			if (String.IsNullOrEmpty(directory))
			{
				resultData.ErrorMessage = "Failed to find '" + projectFolder + "' solution root folder in assembly path:\n\n" + assemblyDirectory;
				Logger.Warn(resultData.ErrorMessage);
				return String.Empty;
			}
			// Code files are generated to '..\Dbas\Generated\PatientMgr\' folder.
			directory += Path.DirectorySeparatorChar + "Database" + Path.DirectorySeparatorChar + "Generated" + Path.DirectorySeparatorChar + "PatientMgr";
			Logger.Debug(fn + " Output folder: " + directory);
			if (!FileUtil.ValidateDirectory(directory, true))
			{
				resultData.ErrorMessage = "Output folder not found:\n\n" + directory;
				Logger.Warn(resultData.ErrorMessage);
				return String.Empty;
			}
			return directory;
		}

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