/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <string.h>
#include <mysql/YTable.hxx>
#include <mysql/YTables.hxx>
#include <com/sun/star/sdbc/XRow.hpp>
#include <com/sun/star/sdbc/XResultSet.hpp>
#include <com/sun/star/sdbcx/KeyType.hpp>
#include <com/sun/star/sdbc/KeyRule.hpp>
#include <cppuhelper/typeprovider.hxx>
#include <com/sun/star/lang/DisposedException.hpp>
#include <com/sun/star/sdbc/ColumnValue.hpp>
#include <com/sun/star/sdbcx/Privilege.hpp>
#include <comphelper/property.hxx>
#include <comphelper/extract.hxx>
#include <comphelper/types.hxx>
#include <connectivity/dbtools.hxx>
#include <connectivity/sdbcx/VColumn.hxx>
#include <connectivity/TKeys.hxx>
#include <connectivity/TIndexes.hxx>
#include <connectivity/TColumnsHelper.hxx>
#include <mysql/YCatalog.hxx>
#include <mysql/YColumns.hxx>
#include <TConnection.hxx>


using namespace ::comphelper;
using namespace connectivity::mysql;
using namespace connectivity::sdbcx;
using namespace connectivity;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbcx;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::lang;
namespace connectivity
{
    namespace mysql
    {
        class OMySQLKeysHelper : public OKeysHelper
        {
        protected:

            virtual OUString getDropForeignKey() const override
            {
                return OUString(" DROP FOREIGN KEY ");
            }
        public:
            OMySQLKeysHelper(   OTableHelper* _pTable,
                ::osl::Mutex& _rMutex,
                const ::std::vector< OUString>& _rVector
                ) : OKeysHelper(_pTable,_rMutex,_rVector){}

        };
    }
}

OMySQLTable::OMySQLTable(   sdbcx::OCollection* _pTables,
                           const Reference< XConnection >& _xConnection)
    :OTableHelper(_pTables,_xConnection,true)
{
    // we create a new table here, so we should have all the rights or ;-)
    m_nPrivileges = Privilege::DROP         |
                    Privilege::REFERENCE    |
                    Privilege::ALTER        |
                    Privilege::CREATE       |
                    Privilege::READ         |
                    Privilege::DELETE       |
                    Privilege::UPDATE       |
                    Privilege::INSERT       |
                    Privilege::SELECT;
    construct();
}

OMySQLTable::OMySQLTable(   sdbcx::OCollection* _pTables,
                           const Reference< XConnection >& _xConnection,
                    const OUString& Name,
                    const OUString& Type,
                    const OUString& Description ,
                    const OUString& SchemaName,
                    const OUString& CatalogName,
                    sal_Int32 _nPrivileges
                ) : OTableHelper(   _pTables,
                                    _xConnection,
                                    true,
                                    Name,
                                    Type,
                                    Description,
                                    SchemaName,
                                    CatalogName)
 , m_nPrivileges(_nPrivileges)
{
    construct();
}

void OMySQLTable::construct()
{
    OTableHelper::construct();
    if ( !isNew() )
        registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_PRIVILEGES),  PROPERTY_ID_PRIVILEGES,PropertyAttribute::READONLY,&m_nPrivileges,  cppu::UnoType<decltype(m_nPrivileges)>::get());
}

::cppu::IPropertyArrayHelper* OMySQLTable::createArrayHelper( sal_Int32 /*_nId*/ ) const
{
    return doCreateArrayHelper();
}

::cppu::IPropertyArrayHelper & OMySQLTable::getInfoHelper()
{
    return *static_cast<OMySQLTable_PROP*>(this)->getArrayHelper(isNew() ? 1 : 0);
}

sdbcx::OCollection* OMySQLTable::createColumns(const ::std::vector< OUString>& _rNames)
{
    OMySQLColumns* pColumns = new OMySQLColumns(*this,m_aMutex,_rNames);
    pColumns->setParent(this);
    return pColumns;
}

sdbcx::OCollection* OMySQLTable::createKeys(const ::std::vector< OUString>& _rNames)
{
    return new OMySQLKeysHelper(this,m_aMutex,_rNames);
}

sdbcx::OCollection* OMySQLTable::createIndexes(const ::std::vector< OUString>& _rNames)
{
    return new OIndexesHelper(this,m_aMutex,_rNames);
}

Sequence< sal_Int8 > OMySQLTable::getUnoTunnelImplementationId()
{
    static ::cppu::OImplementationId implId;

    return implId.getImplementationId();
}

// css::lang::XUnoTunnel

sal_Int64 OMySQLTable::getSomething( const Sequence< sal_Int8 > & rId )
{
    return (rId.getLength() == 16 && 0 == memcmp(getUnoTunnelImplementationId().getConstArray(),  rId.getConstArray(), 16 ) )
                ? reinterpret_cast< sal_Int64 >( this )
                : OTable_TYPEDEF::getSomething(rId);
}

// XAlterTable
void SAL_CALL OMySQLTable::alterColumnByName( const OUString& colName, const Reference< XPropertySet >& descriptor )
{
    ::osl::MutexGuard aGuard(m_aMutex);
    checkDisposed(
#ifdef __GNUC__
        ::connectivity::sdbcx::OTableDescriptor_BASE::rBHelper.bDisposed
#else
        rBHelper.bDisposed
#endif
        );

    if ( !m_xColumns || !m_xColumns->hasByName(colName) )
        throw NoSuchElementException(colName,*this);


    if ( !isNew() )
    {
        // first we have to check what should be altered
        Reference<XPropertySet> xProp;
        m_xColumns->getByName(colName) >>= xProp;
        // first check the types
        sal_Int32 nOldType = 0,nNewType = 0,nOldPrec = 0,nNewPrec = 0,nOldScale = 0,nNewScale = 0;

        ::dbtools::OPropertyMap& rProp = OMetaConnection::getPropMap();
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_TYPE))         >>= nOldType;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_TYPE))    >>= nNewType;
        // and precisions and scale
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_PRECISION))    >>= nOldPrec;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_PRECISION))>>= nNewPrec;
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_SCALE))        >>= nOldScale;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_SCALE))   >>= nNewScale;
        // second: check the "is nullable" value
        sal_Int32 nOldNullable = 0,nNewNullable = 0;
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_ISNULLABLE))       >>= nOldNullable;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_ISNULLABLE))  >>= nNewNullable;

        // check also the auto_increment
        bool bOldAutoIncrement = false,bAutoIncrement = false;
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_ISAUTOINCREMENT))      >>= bOldAutoIncrement;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_ISAUTOINCREMENT)) >>= bAutoIncrement;
        bool bColumnNameChanged = false;
        OUString sOldDesc,sNewDesc;
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_DESCRIPTION))      >>= sOldDesc;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_DESCRIPTION)) >>= sNewDesc;

        if (    nOldType != nNewType
            ||  nOldPrec != nNewPrec
            ||  nOldScale != nNewScale
            ||  nNewNullable != nOldNullable
            ||  bOldAutoIncrement != bAutoIncrement
            || sOldDesc != sNewDesc )
        {
            // special handling because they changed the type names to distinguish
            // if a column should be an auto_incmrement one
            if ( bOldAutoIncrement != bAutoIncrement )
            {
                OUString sTypeName;
                descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_TYPENAME)) >>= sTypeName;

                static const char s_sAutoIncrement[] = "auto_increment";
                if ( bAutoIncrement )
                {
                    if ( sTypeName.indexOf(s_sAutoIncrement) == -1 )
                    {
                        sTypeName += " ";
                        sTypeName += s_sAutoIncrement;
                    }
                }
                else
                {
                    sal_Int32 nIndex = 0;
                    if ( !sTypeName.isEmpty() && (nIndex = sTypeName.indexOf(s_sAutoIncrement)) != -1 )
                    {
                        sTypeName = sTypeName.copy(0,nIndex);
                        descriptor->setPropertyValue(rProp.getNameByIndex(PROPERTY_ID_TYPENAME),makeAny(sTypeName));
                    }
                }
            }
            alterColumnType(nNewType,colName,descriptor);
            bColumnNameChanged = true;
        }

        // third: check the default values
        OUString sNewDefault,sOldDefault;
        xProp->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_DEFAULTVALUE))     >>= sOldDefault;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_DEFAULTVALUE)) >>= sNewDefault;

        if(!sOldDefault.isEmpty())
        {
            dropDefaultValue(colName);
            if(!sNewDefault.isEmpty() && sOldDefault != sNewDefault)
                alterDefaultValue(sNewDefault,colName);
        }
        else if(!sNewDefault.isEmpty())
            alterDefaultValue(sNewDefault,colName);

        // now we should look if the name of the column changed
        OUString sNewColumnName;
        descriptor->getPropertyValue(rProp.getNameByIndex(PROPERTY_ID_NAME)) >>= sNewColumnName;
        if ( !sNewColumnName.equalsIgnoreAsciiCase(colName) && !bColumnNameChanged )
        {
            const OUString sQuote = getMetaData()->getIdentifierQuoteString(  );
            OUString sSql = getAlterTableColumnPart() +
                " CHANGE " + ::dbtools::quoteName(sQuote,colName) +
                " " + OTables::adjustSQL(::dbtools::createStandardColumnPart(descriptor,getConnection(),static_cast<OTables*>(m_pTables),getTypeCreatePattern()));
            executeStatement(sSql);
        }
        m_xColumns->refresh();
    }
    else
    {
        if(m_xColumns)
        {
            m_xColumns->dropByName(colName);
            m_xColumns->appendByDescriptor(descriptor);
        }
    }

}

void OMySQLTable::alterColumnType(sal_Int32 nNewType,const OUString& _rColName, const Reference<XPropertySet>& _xDescriptor)
{
    const OUString sQuote = getMetaData()->getIdentifierQuoteString(  );
    OUString sSql = getAlterTableColumnPart() +
        " CHANGE " + ::dbtools::quoteName(sQuote,_rColName) +
        " ";

    OColumn* pColumn = new OColumn(true);
    Reference<XPropertySet> xProp = pColumn;
    ::comphelper::copyProperties(_xDescriptor,xProp);
    xProp->setPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE),makeAny(nNewType));

    sSql += OTables::adjustSQL(::dbtools::createStandardColumnPart(xProp,getConnection(),static_cast<OTables*>(m_pTables),getTypeCreatePattern()));
    executeStatement(sSql);
}

OUString OMySQLTable::getTypeCreatePattern() const
{
    return OUString("(M,D)");
}

void OMySQLTable::alterDefaultValue(const OUString& _sNewDefault,const OUString& _rColName)
{
    const OUString sQuote = getMetaData()->getIdentifierQuoteString(  );
    OUString sSql = getAlterTableColumnPart() +
        " ALTER " + ::dbtools::quoteName(sQuote,_rColName) +
        " SET DEFAULT '" + _sNewDefault + "'";

    executeStatement(sSql);
}

void OMySQLTable::dropDefaultValue(const OUString& _rColName)
{
    const OUString sQuote = getMetaData()->getIdentifierQuoteString(  );
    OUString sSql = getAlterTableColumnPart() +
        " ALTER " + ::dbtools::quoteName(sQuote,_rColName) +
        " DROP DEFAULT";

    executeStatement(sSql);
}

OUString OMySQLTable::getAlterTableColumnPart()
{
    OUString sSql(  "ALTER TABLE " );

    OUString sComposedName(
        ::dbtools::composeTableName( getMetaData(), m_CatalogName, m_SchemaName, m_Name, true, ::dbtools::EComposeRule::InTableDefinitions ) );
    sSql += sComposedName;

    return sSql;
}

void OMySQLTable::executeStatement(const OUString& _rStatement )
{
    OUString sSQL = _rStatement;
    if(sSQL.endsWith(","))
        sSQL = sSQL.replaceAt(sSQL.getLength()-1, 1, ")");

    Reference< XStatement > xStmt = getConnection()->createStatement(  );
    if ( xStmt.is() )
    {
        xStmt->execute(sSQL);
        ::comphelper::disposeComponent(xStmt);
    }
}

OUString OMySQLTable::getRenameStart() const
{
    return OUString("RENAME TABLE ");
}


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