/* -*- 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 <writer/WTable.hxx>
#include <com/sun/star/sdbc/ColumnValue.hpp>
#include <com/sun/star/sdbc/DataType.hpp>
#include <com/sun/star/sdbc/SQLException.hpp>
#include <com/sun/star/text/XTextDocument.hpp>
#include <com/sun/star/text/XTextTable.hpp>
#include <com/sun/star/text/XTextTablesSupplier.hpp>
#include <com/sun/star/table/XCellRange.hpp>
#include <com/sun/star/text/XText.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <writer/WConnection.hxx>
#include <connectivity/sdbcx/VColumn.hxx>
#include <sal/log.hxx>
#include <comphelper/servicehelper.hxx>

namespace com::sun::star::text
{
class XTextDocument;
}

using namespace ::com::sun::star;

static void lcl_GetDataArea(const uno::Reference<text::XTextTable>& xTable, sal_Int32& rColumnCount,
                            sal_Int32& rRowCount)
{
    uno::Reference<container::XIndexAccess> xColumns = xTable->getColumns();
    if (xColumns.is())
        rColumnCount = xColumns->getCount();

    uno::Reference<container::XIndexAccess> xRows = xTable->getRows();
    if (xRows.is())
        rRowCount = xRows->getCount() - 1; // first row (headers) is not counted
}

static void lcl_GetColumnInfo(const uno::Reference<text::XTextTable>& xTable, sal_Int32 nDocColumn,
                              bool bHasHeaders, OUString& rName, sal_Int32& rDataType,
                              bool& rCurrency)
{
    uno::Reference<table::XCellRange> xCellRange(xTable, uno::UNO_QUERY);
    // get column name from first row, if range contains headers
    if (bHasHeaders)
    {
        uno::Reference<text::XText> xHeaderText(
            xCellRange->getCellByPosition(nDocColumn, /*nStartRow*/ 0), uno::UNO_QUERY);
        if (xHeaderText.is())
            rName = xHeaderText->getString();
    }

    rCurrency = false;
    rDataType = sdbc::DataType::VARCHAR;
}

static void lcl_SetValue(connectivity::ORowSetValue& rValue,
                         const uno::Reference<text::XTextTable>& xTable, sal_Int32 nStartCol,
                         bool bHasHeaders, sal_Int32 nDBRow, sal_Int32 nDBColumn)
{
    sal_Int32 nDocColumn = nStartCol + nDBColumn - 1; // database counts from 1
    sal_Int32 nDocRow = nDBRow - 1;
    if (bHasHeaders)
        ++nDocRow;

    uno::Reference<table::XCellRange> xCellRange(xTable, uno::UNO_QUERY);
    uno::Reference<table::XCell> xCell;
    try
    {
        xCell = xCellRange->getCellByPosition(nDocColumn, nDocRow);
    }
    catch (const lang::IndexOutOfBoundsException& /*rException*/)
    {
        SAL_WARN("connectivity.writer",
                 "getCellByPosition(" << nDocColumn << ", " << nDocRow << ") failed");
        rValue = OUString();
    }

    if (xCell.is())
    {
        const uno::Reference<text::XText> xText(xCell, uno::UNO_QUERY);
        if (xText.is())
            rValue = xText->getString();
    }
}

namespace connectivity::writer
{
void OWriterTable::fillColumns()
{
    if (!m_xTable.is())
        throw sdbc::SQLException();

    OUString aTypeName;
    ::comphelper::UStringMixEqual aCase(
        m_pConnection->getMetaData()->supportsMixedCaseQuotedIdentifiers());
    const bool bStoresMixedCaseQuotedIdentifiers
        = getConnection()->getMetaData()->supportsMixedCaseQuotedIdentifiers();

    for (sal_Int32 i = 0; i < m_nDataCols; i++)
    {
        OUString aColumnName;
        sal_Int32 eType = sdbc::DataType::OTHER;
        bool bCurrency = false;

        lcl_GetColumnInfo(m_xTable, m_nStartCol + i, m_bHasHeaders, aColumnName, eType, bCurrency);

        sal_Int32 nPrecision = 0; //! ...
        sal_Int32 nDecimals = 0; //! ...

        switch (eType)
        {
            case sdbc::DataType::VARCHAR:
                aTypeName = "VARCHAR";
                break;
            case sdbc::DataType::DECIMAL:
                aTypeName = "DECIMAL";
                break;
            case sdbc::DataType::BIT:
                aTypeName = "BOOL";
                break;
            case sdbc::DataType::DATE:
                aTypeName = "DATE";
                break;
            case sdbc::DataType::TIME:
                aTypeName = "TIME";
                break;
            case sdbc::DataType::TIMESTAMP:
                aTypeName = "TIMESTAMP";
                break;
            default:
                SAL_WARN("connectivity.writer", "missing type name");
                aTypeName.clear();
        }

        // check if the column name already exists
        OUString aAlias = aColumnName;
        auto aFind = connectivity::find(m_aColumns->begin(), m_aColumns->end(), aAlias, aCase);
        sal_Int32 nExprCnt = 0;
        while (aFind != m_aColumns->end())
        {
            aAlias = aColumnName + OUString::number(++nExprCnt);
            aFind = connectivity::find(m_aColumns->begin(), m_aColumns->end(), aAlias, aCase);
        }

        rtl::Reference<sdbcx::OColumn> pColumn = new sdbcx::OColumn(
            aAlias, aTypeName, OUString(), OUString(), sdbc::ColumnValue::NULLABLE, nPrecision,
            nDecimals, eType, false, false, bCurrency, bStoresMixedCaseQuotedIdentifiers,
            m_CatalogName, getSchema(), getName());
        m_aColumns->push_back(pColumn);
    }
}

OWriterTable::OWriterTable(sdbcx::OCollection* _pTables, OWriterConnection* _pConnection,
                           const OUString& Name, const OUString& Type)
    : OWriterTable_BASE(_pTables, _pConnection, Name, Type, OUString() /*Description*/,
                        OUString() /*SchemaName*/, OUString() /*CatalogName*/)
    , m_pWriterConnection(_pConnection)
    , m_nStartCol(0)
    , m_nDataCols(0)
    , m_bHasHeaders(false)
{
}

void OWriterTable::construct()
{
    uno::Reference<text::XTextDocument> xDoc = m_pWriterConnection->acquireDoc();
    if (xDoc.is())
    {
        uno::Reference<text::XTextTablesSupplier> xTextTablesSupplier(xDoc, uno::UNO_QUERY);
        uno::Reference<container::XNameAccess> xTables = xTextTablesSupplier->getTextTables();
        if (xTables.is() && xTables->hasByName(m_Name))
        {
            m_xTable.set(xTables->getByName(m_Name), uno::UNO_QUERY);
            if (m_xTable.is())
            {
                lcl_GetDataArea(m_xTable, m_nDataCols, m_nDataRows);
                m_bHasHeaders = true;
            }
        }
    }

    fillColumns();

    refreshColumns();
}

void SAL_CALL OWriterTable::disposing()
{
    OFileTable::disposing();
    ::osl::MutexGuard aGuard(m_aMutex);
    m_aColumns = nullptr;
    if (m_pWriterConnection)
        m_pWriterConnection->releaseDoc();
    m_pWriterConnection = nullptr;
}

const uno::Sequence<sal_Int8>& OWriterTable::getUnoTunnelId()
{
    static const comphelper::UnoIdInit implId;
    return implId.getSeq();
}

sal_Int64 OWriterTable::getSomething(const uno::Sequence<sal_Int8>& rId)
{
    return comphelper::getSomethingImpl(rId, this,
                                        comphelper::FallbackToGetSomethingOf<OWriterTable_BASE>{});
}

bool OWriterTable::fetchRow(OValueRefRow& _rRow, const OSQLColumns& _rCols, bool bRetrieveData)
{
    // read the bookmark

    _rRow->setDeleted(false);
    *(*_rRow)[0] = m_nFilePos;

    if (!bRetrieveData)
        return true;

    // fields

    const OValueRefVector::size_type nCount = std::min(_rRow->size(), _rCols.size() + 1);
    for (OValueRefVector::size_type i = 1; i < nCount; i++)
    {
        if ((*_rRow)[i]->isBound())
        {
            lcl_SetValue((*_rRow)[i]->get(), m_xTable, m_nStartCol, m_bHasHeaders, m_nFilePos, i);
        }
    }
    return true;
}

} // namespace

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