// Copyright (C) 2004-2007 MySQL AB
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation
//
// There are special exceptions to the terms and conditions of the GPL 
// as it is applied to this software. View the full text of the 
// exception in file EXCEPTIONS in the directory of this software 
// distribution.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using System.Data;
using System.IO;
using NUnit.Framework;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;

namespace MySql.Data.MySqlClient.Tests
{
	[TestFixture]
	public class Tokenizer : BaseTest
	{

#if !CF
        [Test]
        public void Simple()
        {
            SqlTokenizer tokenizer = new SqlTokenizer("SELECT * FROM Test");
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void DashSingleLineComment()
        {
            string comment = "-- this is my comment\r\n";
            string sql = String.Format("SELECT {0} * FROM Test", comment);
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual(comment.Trim(), tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());

            tokenizer = new SqlTokenizer(sql); 
            tokenizer.ReturnComments = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void HashSingleLineComment()
        {
            string comment = "#this is my comment\r\n";
            string sql = String.Format("SELECT {0} * FROM Test", comment);
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual(comment.Trim(), tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());

            tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void MultiLineComment()
        {
            string comment = "/* this is my comment \r\n lines 2 \r\n line 3*/";
            string sql = String.Format("SELECT{0} * FROM Test", comment);
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual(comment.Trim(), tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());

            tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void Parameter()
        {
            string sql = "SELECT * FROM Test WHERE id=@id AND id2=?id2";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.AreEqual("WHERE", tokenizer.NextToken());
            Assert.AreEqual("id", tokenizer.NextToken());
            Assert.AreEqual("=", tokenizer.NextToken());
            Assert.AreEqual("@id", tokenizer.NextToken());
            Assert.AreEqual("AND", tokenizer.NextToken());
            Assert.AreEqual("id2", tokenizer.NextToken());
            Assert.AreEqual("=", tokenizer.NextToken());
            Assert.AreEqual("?id2", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void NextParameter()
        {
            string sql = "SELECT * FROM Test WHERE id=@id AND id2=?id2";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("@id", tokenizer.NextParameter());
            Assert.AreEqual("?id2", tokenizer.NextParameter());
            Assert.IsNull(tokenizer.NextParameter());
        }

        [Test]
        public void ParameterWithSpecialCharacters()
        {
            string sql = "SELECT * FROM Test WHERE id=@id_$123";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = true;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("*", tokenizer.NextToken());
            Assert.AreEqual("FROM", tokenizer.NextToken());
            Assert.AreEqual("Test", tokenizer.NextToken());
            Assert.AreEqual("WHERE", tokenizer.NextToken());
            Assert.AreEqual("id", tokenizer.NextToken());
            Assert.AreEqual("=", tokenizer.NextToken());
            Assert.AreEqual("@id_$123", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void StringLiteral()
        {
            string sql = "SELECT 'a', 1, 'b'";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("'a'", tokenizer.NextToken());
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("1", tokenizer.NextToken());
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("'b'", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void UserVariable()
        {
            string sql = "SELECT 'a', 1, @@myVar";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.ReturnComments = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("'a'", tokenizer.NextToken());
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("1", tokenizer.NextToken());
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("@@myVar", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void AnsiQuotes()
        {
            string sql = "SELECT 'a', \"a\", `a`";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.AnsiQuotes = false;
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("'a'", tokenizer.NextToken());
            Assert.IsTrue(tokenizer.Quoted);
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("\"a\"", tokenizer.NextToken());
            Assert.IsTrue(tokenizer.Quoted);
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("`a`", tokenizer.NextToken());
            Assert.IsTrue(tokenizer.Quoted);
            Assert.IsNull(tokenizer.NextToken());
        }

        [Test]
        public void ParseProcBody()
        {
            string sql = "CREATE PROCEDURE spTest(testid INT, testname VARCHAR(20)) BEGIN SELECT 1; END";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.AnsiQuotes = false;
            Assert.AreEqual("CREATE", tokenizer.NextToken());
            Assert.AreEqual("PROCEDURE", tokenizer.NextToken());
            Assert.AreEqual("spTest", tokenizer.NextToken());
            Assert.AreEqual("(", tokenizer.NextToken());
            Assert.AreEqual("testid", tokenizer.NextToken());
            Assert.AreEqual("INT", tokenizer.NextToken());
            Assert.AreEqual(",", tokenizer.NextToken());
            Assert.AreEqual("testname", tokenizer.NextToken());
            Assert.AreEqual("VARCHAR", tokenizer.NextToken());
            Assert.AreEqual("(", tokenizer.NextToken());
            Assert.AreEqual("20", tokenizer.NextToken());
            Assert.AreEqual(")", tokenizer.NextToken());
            Assert.AreEqual(")", tokenizer.NextToken());
            Assert.AreEqual("BEGIN", tokenizer.NextToken());
            Assert.AreEqual("SELECT", tokenizer.NextToken());
            Assert.AreEqual("1", tokenizer.NextToken());
            Assert.AreEqual(";", tokenizer.NextToken());
            Assert.AreEqual("END", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }
#endif

        /// <summary>
        /// Bug #44318	Tokenizer
        /// </summary>
        [Test]
        public void NoSpaceAroundEquals()
        {
            execSQL("DROP TABLE IF EXISTS Test");
            execSQL("CREATE TABLE Test(name VARCHAR(40))");

            MySqlCommand cmd = new MySqlCommand("INSERT INTO Test SET name='test -- test';", conn);
            cmd.ExecuteNonQuery();
            cmd.CommandText = "SELECT name FROM Test";
            object o = cmd.ExecuteScalar();
            Assert.AreEqual("test -- test", o);

            cmd.CommandText = "UPDATE Test SET name='Can you explain this ?';";
            cmd.ExecuteNonQuery();
            cmd.CommandText = "SELECT name FROM Test";
            o = cmd.ExecuteScalar();
            Assert.AreEqual("Can you explain this ?", o);
        }

        [Test]
        public void Slash()
        {
            string sql = "AND // OR";
            SqlTokenizer tokenizer = new SqlTokenizer(sql);
            tokenizer.AnsiQuotes = false;
            Assert.AreEqual("AND", tokenizer.NextToken());
            Assert.AreEqual("/", tokenizer.NextToken());
            Assert.AreEqual("/", tokenizer.NextToken());
            Assert.AreEqual("OR", tokenizer.NextToken());
            Assert.IsNull(tokenizer.NextToken());
        }
    }
}