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#include <QtTest/QtTest>
#include <qguiapplication.h>
#include <qsqldatabase.h>
#include <qsqlerror.h>
#include <qsqlquery.h>
#include <qsqlrecord.h>
#include <qsql.h>
#include <qsqlresult.h>
#include <qsqldriver.h>
#include <qdebug.h>
#include <private/qsqlnulldriver_p.h>

#include "../qsqldatabase/tst_databases.h"

//TESTED_FILES=

class tst_QSql : public QObject
{
Q_OBJECT

public:
    tst_QSql();
    virtual ~tst_QSql();


public slots:
    void initTestCase();
    void cleanupTestCase();
    void init();
    void cleanup();
private slots:
    void open();
    void openInvalid();
    void registerSqlDriver();

    // problem specific tests
    void openErrorRecovery();
    void concurrentAccess();
    void basicDriverTest();
};

/****************** General Qt SQL Module tests *****************/

tst_QSql::tst_QSql()
{
}

tst_QSql::~tst_QSql()
{
}

void tst_QSql::initTestCase()
{
}

void tst_QSql::cleanupTestCase()
{
}

void tst_QSql::init()
{
}

void tst_QSql::cleanup()
{
}


// this is a very basic test for drivers that cannot create/delete tables
// it can be used while developing new drivers,
// it's original purpose is to test ODBC Text datasources that are basically
// to stupid to do anything more advanced than SELECT/INSERT/UPDATE/DELETE
// the datasource has to have a table called "qtest_basictest" consisting
// of a field "id"(integer) and "name"(char/varchar).
void tst_QSql::basicDriverTest()
{
    int argc = 0;
    QGuiApplication app( argc, 0, false );
    tst_Databases dbs;
    dbs.open();

    foreach( const QString& dbName, dbs.dbNames )
    {
        QSqlDatabase db = QSqlDatabase::database( dbName );
        QVERIFY_SQL( db, isValid() );

        QStringList tables = db.tables();
        QString tableName;

        if ( tables.contains( "qtest_basictest.txt" ) )
            tableName = "qtest_basictest.txt";
        else if ( tables.contains( "qtest_basictest" ) )
            tableName = "qtest_basictest";
        else if ( tables.contains( "QTEST_BASICTEST" ) )
            tableName = "QTEST_BASICTEST";
        else {
            QVERIFY( 1 );
            continue;
        }

        qDebug("Testing: %s", qPrintable(tst_Databases::dbToString( db )));

        QSqlRecord rInf = db.record( tableName );
        QCOMPARE( rInf.count(), 2 );
        QCOMPARE( rInf.fieldName( 0 ).toLower(), QString( "id" ) );
        QCOMPARE( rInf.fieldName( 1 ).toLower(), QString( "name" ) );
    }

    dbs.close();
    QVERIFY( 1 ); // make sure the test doesn't fail if no database drivers are there
}

// make sure that the static stuff will be deleted
// when using multiple QApplication objects
void tst_QSql::open()
{
    int i;
    int argc = 0;
    int count = -1;
    for ( i = 0; i < 10; ++i ) {

	QApplication app( argc, 0, false );
	tst_Databases dbs;

	dbs.open();
	if ( count == -1 )
	    // first iteration: see how many dbs are open
	    count = (int) dbs.dbNames.count();
	else
	    // next iterations: make sure all are opened again
	    QCOMPARE( count, (int)dbs.dbNames.count() );
	dbs.close();
    }
}

void tst_QSql::openInvalid()
{
    QSqlDatabase db;
    QVERIFY(!db.open());

    QSqlDatabase db2 = QSqlDatabase::addDatabase("doesnt_exist_will_never_exist", "blah");
    QFAIL_SQL(db2, open());
}

void tst_QSql::concurrentAccess()
{
    int argc = 0;
    QGuiApplication app( argc, 0, false );
    tst_Databases dbs;

    dbs.open();
    foreach ( const QString& dbName, dbs.dbNames ) {
	QSqlDatabase db = QSqlDatabase::database( dbName );
	QVERIFY( db.isValid() );
        if (tst_Databases::isMSAccess(db))
            continue;

	QSqlDatabase ndb = QSqlDatabase::addDatabase( db.driverName(), "tst_QSql::concurrentAccess" );
	ndb.setDatabaseName( db.databaseName() );
	ndb.setHostName( db.hostName() );
	ndb.setPort( db.port() );
	ndb.setUserName( db.userName() );
	ndb.setPassword( db.password() );
	QVERIFY_SQL( ndb, open() );

	QCOMPARE( db.tables(), ndb.tables() );
    }
    // no database servers installed - don't fail
    QVERIFY(1);
    dbs.close();
}

void tst_QSql::openErrorRecovery()
{
    int argc = 0;
    QGuiApplication app( argc, 0, false );
    tst_Databases dbs;

    dbs.addDbs();
    if (dbs.dbNames.isEmpty())
        QSKIP("No database drivers installed");
    foreach ( const QString& dbName, dbs.dbNames ) {
	QSqlDatabase db = QSqlDatabase::database( dbName, false );
	CHECK_DATABASE( db );

	QString userName = db.userName();
	QString password = db.password();

	// force an open error
	if ( db.open( "dummy130977", "doesnt_exist" ) ) {
            qDebug("Promiscuous database server without access control - test skipped for %s",
                  qPrintable(tst_Databases::dbToString( db )) );
	    QVERIFY(1);
	    continue;
	}

	QFAIL_SQL( db, isOpen() );
	QVERIFY_SQL( db, isOpenError() );

	// now open it
	if ( !db.open( userName, password ) ) {
	    qDebug() << "Could not open Database " << tst_Databases::dbToString( db ) <<
		    ". Assuming DB is down, skipping... (Error: " << 
		    tst_Databases::printError( db.lastError() ) << ")";
	    continue;
	}
	QVERIFY_SQL( db, open( userName, password ) );
	QVERIFY_SQL( db, isOpen() );
	QFAIL_SQL( db, isOpenError() );
	db.close();
	QFAIL_SQL( db, isOpen() );

	// force another open error
	QFAIL_SQL( db, open( "dummy130977", "doesnt_exist" ) );
	QFAIL_SQL( db, isOpen() );
	QVERIFY_SQL( db, isOpenError() );
    }
}

void tst_QSql::registerSqlDriver()
{
    int argc = 0;
    QGuiApplication app( argc, 0, false );

    QSqlDatabase::registerSqlDriver( "QSQLTESTDRIVER", new QSqlDriverCreator<QSqlNullDriver> );
    QVERIFY( QSqlDatabase::drivers().contains( "QSQLTESTDRIVER" ) );

    QSqlDatabase db = QSqlDatabase::addDatabase( "QSQLTESTDRIVER" );
    QVERIFY( db.isValid() );

    QCOMPARE( db.tables(), QStringList() );
}

QTEST_APPLESS_MAIN(tst_QSql)
#include "tst_qsql.moc"