//
// System.Data.OleDb.libgda
//
// Authors:
//   Rodrigo Moya (rodrigo@ximian.com)
//   Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Rodrigo Moya, 2002
// Copyright (C) Tim Coleman, 2002
//

using System.Data;
using System.Data.Common;
using System.Runtime.InteropServices;

namespace System.Data.OleDb
{
	internal enum GdaCommandOptions {
		IgnoreErrors = 1,
		StopOnErrors = 1 << 1,
		BadOption = 1 << 2,
	};

	internal enum GdaCommandType {
		Sql = 0,
		Xml = 1,
		Procedure = 2,
		Table = 3,
		Schema = 4,
		Invalid = 5
	};
	
	sealed internal class libgda
	{
		private static IntPtr gdaClient = IntPtr.Zero;

		public static IntPtr GdaClient
		{
			get {
				if (gdaClient == IntPtr.Zero)
					gdaClient = gda_client_new ();

				return gdaClient;
			}
		}
		
		[DllImport("gda-2")]
		public static extern void gda_init (string app_id, string version, int nargs, string[] args);

		[DllImport("gda-2")]
		public static extern int gda_data_model_get_n_rows (IntPtr model);

		[DllImport("gda-2")]
		public static extern int gda_data_model_get_n_columns (IntPtr model);

		[DllImport("gda-2")]
		public static extern IntPtr gda_data_model_get_value_at (IntPtr model, int col, int row);
		
		[DllImport("gda-2")]
		public static extern IntPtr gda_client_new ();

		[DllImport("gda-2")]
		public static extern IntPtr gda_client_open_connection (IntPtr client, string dsn, string username, string password);

		[DllImport("gda-2")]
		public static extern bool gda_connection_is_open (IntPtr cnc);
		
		[DllImport("gda-2")]
		public static extern bool gda_connection_close (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_database (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_dsn (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_cnc_string (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_provider (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_username (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern string gda_connection_get_password (IntPtr cnc);

		[DllImport("gda-2")]
		public static extern IntPtr gda_transaction_new (string name);

		[DllImport("gda-2")]
		public static extern IntPtr gda_transaction_get_name (IntPtr xaction);

		[DllImport("gda-2")]
		public static extern IntPtr gda_transaction_set_name (IntPtr xaction, string name);
	
		[DllImport("gda-2")]
		public static extern bool gda_connection_begin_transaction (IntPtr cnc, IntPtr xaction);

		[DllImport("gda-2")]
		public static extern bool gda_connection_commit_transaction (IntPtr cnc, IntPtr xaction);

		[DllImport("gda-2")]
		public static extern bool gda_connection_rollback_transaction (IntPtr cnc, IntPtr xaction);

		[DllImport("gda-2")]
		public static extern IntPtr gda_connection_execute_command (IntPtr cnc, IntPtr cmd, IntPtr parameterList);
		
		[DllImport("gda-2")]
		public static extern int gda_connection_execute_non_query (IntPtr cnc, IntPtr command, IntPtr parameterList);

		[DllImport("gda-2")]
		public static extern IntPtr gda_connection_execute_single_command (IntPtr cnc, IntPtr command, IntPtr parameterList);

		[DllImport("gda-2")]
		public static extern IntPtr gda_command_new (string text, GdaCommandType type, GdaCommandOptions options);

		[DllImport("gda-2")]
		public static extern void gda_command_set_text (IntPtr cmd, string text);

		[DllImport("gda-2")]
		public static extern void gda_command_set_command_type (IntPtr cmd, GdaCommandType type);
	}
}