/*
 *    The contents of this file are subject to the Initial
 *    Developer's Public License Version 1.0 (the "License");
 *    you may not use this file except in compliance with the
 *    License. You may obtain a copy of the License at
 *    https://github.com/FirebirdSQL/NETProvider/raw/master/license.txt.
 *
 *    Software distributed under the License is distributed on
 *    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
 *    express or implied. See the License for the specific
 *    language governing rights and limitations under the License.
 *
 *    All Rights Reserved.
 */

//$Authors = Jiri Cincura (jiri@cincura.net)

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using FirebirdSql.Data.FirebirdClient;
using FirebirdSql.Data.Services;
using FirebirdSql.Data.TestsBase;
using NUnit.Framework;

[SetUpFixture]
public class FbTestsSetup
{
	private const string DatabaseBase = "netprovider_tests";
	internal const string UserID = "SYSDBA";
	internal const string Password = "masterkey";
	internal const string DataSource = "localhost";
	internal const int Port = 3050;
	internal const string Charset = "utf8";
	internal const bool Pooling = false;
	internal const int PageSize = 16384;
	internal const bool ForcedWrite = false;

	private static HashSet<(FbServerType, bool, FbWireCrypt)> _initalized = new HashSet<(FbServerType, bool, FbWireCrypt)>();

	public static async Task SetUp(FbServerType serverType, bool compression, FbWireCrypt wireCrypt)
	{
		var item = (serverType, compression, wireCrypt);
		if (!_initalized.Contains(item))
		{
			var cs = FbTestsBase.BuildConnectionString(serverType, compression, wireCrypt);
			await FbConnection.CreateDatabaseAsync(cs, PageSize, ForcedWrite, true);
			await using (var connection = new FbConnection(cs))
			{
				await connection.OpenAsync();
				var serverVersion = FbServerProperties.ParseServerVersion(connection.ServerVersion);
				await CreateTables(connection, serverVersion);
				await CreateProcedures(connection, serverVersion);
				await CreateFunctions(connection, serverVersion);
				await CreateTriggers(connection, serverVersion);
			}
			_initalized.Add(item);
		}
	}

	public static string Database(FbServerType serverType, bool compression, FbWireCrypt wireCrypt)
	{
		return $"{DatabaseBase}_{serverType}_{compression}_{wireCrypt}.fdb";
	}

	[OneTimeTearDown]
	public async Task TearDown()
	{
		FbConnection.ClearAllPools();
		foreach (var item in _initalized)
		{
			var cs = FbTestsBase.BuildConnectionString(item.Item1, item.Item2, item.Item3);
			await FbConnection.DropDatabaseAsync(cs);
		}
		_initalized.Clear();
	}

	public static bool ServerVersionAtLeast(Version serverVersion, Version minimum) => serverVersion >= minimum;
	public static bool ServerVersionAtMost(Version serverVersion, Version maximum) => serverVersion < maximum;

	private static async Task CreateTables(FbConnection connection, Version serverVersion)
	{
		var commandText = new StringBuilder();

		commandText.Append("RECREATE TABLE TEST (");
		commandText.Append("INT_FIELD		 INTEGER DEFAULT 0 NOT NULL	PRIMARY	KEY,");
		commandText.Append("CHAR_FIELD		 CHAR(30),");
		commandText.Append("VARCHAR_FIELD	 VARCHAR(100),");
		commandText.Append("BIGINT_FIELD	 BIGINT,");
		commandText.Append("SMALLINT_FIELD	 SMALLINT,");
		commandText.Append("DOUBLE_FIELD	 DOUBLE	PRECISION,");
		commandText.Append("FLOAT_FIELD		 FLOAT,");
		commandText.Append("NUMERIC_FIELD	 NUMERIC(15,2),");
		commandText.Append("DECIMAL_FIELD	 DECIMAL(15,2),");
		commandText.Append("DATE_FIELD		 DATE,");
		commandText.Append("TIME_FIELD		 TIME,");
		commandText.Append("TIMESTAMP_FIELD	 TIMESTAMP,");
		commandText.Append("CLOB_FIELD		 BLOB SUB_TYPE 1 SEGMENT SIZE 80,");
		commandText.Append("BLOB_FIELD		 BLOB SUB_TYPE 0 SEGMENT SIZE 80,");
		commandText.Append("IARRAY_FIELD	 INTEGER [0:3],");
		commandText.Append("SARRAY_FIELD	 SMALLINT [0:4],");
		commandText.Append("LARRAY_FIELD	 BIGINT	[0:5],");
		commandText.Append("FARRAY_FIELD	 FLOAT [0:3],");
		commandText.Append("BARRAY_FIELD	 DOUBLE	PRECISION [1:4],");
		commandText.Append("NARRAY_FIELD	 NUMERIC(10,6) [1:4],");
		commandText.Append("DARRAY_FIELD	 DATE [1:4],");
		commandText.Append("TARRAY_FIELD	 TIME [1:4],");
		commandText.Append("TSARRAY_FIELD	 TIMESTAMP [1:4],");
		commandText.Append("CARRAY_FIELD	 CHAR(21) [1:4],");
		commandText.Append("VARRAY_FIELD	 VARCHAR(30) [1:4],");
		commandText.Append("BIG_ARRAY		 INTEGER [1:32767],");
		commandText.Append("EXPR_FIELD		 COMPUTED BY (smallint_field * 1000),");
		commandText.Append("CS_FIELD		 CHAR(1) CHARACTER SET UNICODE_FSS,");
		commandText.Append("UCCHAR_ARRAY	 CHAR(10) [1:10] CHARACTER SET UNICODE_FSS);");

		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		await using (var command = new FbCommand("recreate table log(occured timestamp, text varchar(20));", connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		await using (var command = new FbCommand("RECREATE TABLE GUID_TEST (INT_FIELD INTEGER, GUID_FIELD CHAR(16) CHARACTER SET OCTETS)", connection))
		{
			await command.ExecuteNonQueryAsync();
		}
	}

	private static async Task CreateProcedures(FbConnection connection, Version serverVersion)
	{
		var commandText = new StringBuilder();

		commandText.Clear();
		commandText.Append("RECREATE PROCEDURE SELECT_DATA\r\n");
		commandText.Append("RETURNS	(\r\n");
		commandText.Append("INT_FIELD INTEGER,\r\n");
		commandText.Append("VARCHAR_FIELD VARCHAR(100),\r\n");
		commandText.Append("DECIMAL_FIELD DECIMAL(15,2))\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("FOR	SELECT INT_FIELD, VARCHAR_FIELD, DECIMAL_FIELD FROM	TEST INTO :INT_FIELD, :VARCHAR_FIELD, :DECIMAL_FIELD\r\n");
		commandText.Append("DO\r\n");
		commandText.Append("SUSPEND;\r\n");
		commandText.Append("end\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("RECREATE PROCEDURE GETRECORDCOUNT\r\n");
		commandText.Append("RETURNS	(\r\n");
		commandText.Append("RECCOUNT SMALLINT)\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("for	select count(*)	from test into :reccount\r\n");
		commandText.Append("do\r\n");
		commandText.Append("suspend;\r\n");
		commandText.Append("end\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("RECREATE PROCEDURE GETVARCHARFIELD (\r\n");
		commandText.Append("ID INTEGER)\r\n");
		commandText.Append("RETURNS	(\r\n");
		commandText.Append("VARCHAR_FIELD VARCHAR(100))\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("for	select varchar_field from test where int_field = :id into :varchar_field\r\n");
		commandText.Append("do\r\n");
		commandText.Append("suspend;\r\n");
		commandText.Append("end\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("RECREATE PROCEDURE GETASCIIBLOB (\r\n");
		commandText.Append("ID INTEGER)\r\n");
		commandText.Append("RETURNS	(\r\n");
		commandText.Append("ASCII_BLOB BLOB	SUB_TYPE 1)\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("for	select clob_field from test	where int_field	= :id into :ascii_blob\r\n");
		commandText.Append("do\r\n");
		commandText.Append("suspend;\r\n");
		commandText.Append("end\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("RECREATE PROCEDURE DATAREADERTEST\r\n");
		commandText.Append("RETURNS	(\r\n");
		commandText.Append("content	VARCHAR(128))\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("content	= 'test';\r\n");
		commandText.Append("suspend;\r\n");
		commandText.Append("end\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("recreate procedure SimpleSP\r\n");
		commandText.Append("returns (result integer) as\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("result = 1000;\r\n");
		commandText.Append("end \r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}
	}

	private static async Task CreateFunctions(FbConnection connection, Version serverVersion)
	{
		if (!ServerVersionAtLeast(serverVersion, new Version(3, 0, 0, 0)))
			return;

		var commandText = new StringBuilder();

		commandText.Append("RECREATE FUNCTION TEST_FUNC(\r\n");
		commandText.Append("I INT)\r\n");
		commandText.Append("RETURNS	BIGINT\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("BEGIN\r\n");
		commandText.Append("RETURN I;\r\n");
		commandText.Append("END\r\n");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}
	}

	private static async Task CreateTriggers(FbConnection connection, Version serverVersion)
	{
		var commandText = new StringBuilder();

		commandText.Clear();
		commandText.Append("RECREATE TRIGGER new_row FOR test	ACTIVE\r\n");
		commandText.Append("AFTER INSERT POSITION 0\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("BEGIN\r\n");
		commandText.Append("POST_EVENT 'new	row';\r\n");
		commandText.Append("END");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("RECREATE TRIGGER update_row FOR test ACTIVE\r\n");
		commandText.Append("AFTER UPDATE POSITION 0\r\n");
		commandText.Append("AS\r\n");
		commandText.Append("BEGIN\r\n");
		commandText.Append("POST_EVENT 'updated	row';\r\n");
		commandText.Append("END");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}

		commandText.Clear();
		commandText.Append("recreate trigger log active on connect\r\n");
		commandText.Append("as\r\n");
		commandText.Append("begin\r\n");
		commandText.Append("insert into log (occured, text) values (current_timestamp, 'on connect');\r\n");
		commandText.Append("end");
		await using (var command = new FbCommand(commandText.ToString(), connection))
		{
			await command.ExecuteNonQueryAsync();
		}
	}
}
