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/* -*- 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 .
 */

#ifndef INCLUDED_UNOTOOLS_LOCALEDATAWRAPPER_HXX
#define INCLUDED_UNOTOOLS_LOCALEDATAWRAPPER_HXX

#include <com/sun/star/i18n/XLocaleData4.hpp>
#include <com/sun/star/i18n/LocaleItem.hpp>
#include <com/sun/star/i18n/reservedWords.hpp>
#include <rtl/ustring.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <unotools/readwritemutexguard.hxx>
#include <unotools/unotoolsdllapi.h>
#include <memory>
#include <map>

namespace com { namespace sun { namespace star {
    namespace uno {
        class XComponentContext;
    }
}}}
class Date;
namespace tools { class Time; }
class CalendarWrapper;

enum class DateOrder {
    Invalid = -1,
    MDY = 0,
    DMY,
    YMD,
};

enum MeasurementSystem {
    MEASURE_METRIC,
    MEASURE_US
};

class UNOTOOLS_DLLPUBLIC LocaleDataWrapper
{
    static  sal_uInt8                nLocaleDataChecking;    // 0:=dontknow, 1:=yes, 2:=no

    css::uno::Reference< css::uno::XComponentContext > m_xContext;
    css::uno::Reference< css::i18n::XLocaleData4 >     xLD;
    LanguageTag                                        maLanguageTag;
    std::shared_ptr< css::i18n::Calendar2 >            xDefaultCalendar;
    std::shared_ptr< css::i18n::Calendar2 >            xSecondaryCalendar;
    css::i18n::LocaleDataItem                          aLocaleDataItem;
    css::uno::Sequence< OUString >                     aReservedWordSeq;
    css::uno::Sequence< OUString >                     aDateAcceptancePatterns;
    css::uno::Sequence< sal_Int32 >                    aGrouping;
    // cached items
    OUString                aLocaleItem[css::i18n::LocaleItem::COUNT];
    OUString                aReservedWord[css::i18n::reservedWords::COUNT];
    OUString                aCurrSymbol;
    OUString                aCurrBankSymbol;
    DateOrder               nDateOrder;
    DateOrder               nLongDateOrder;
    sal_uInt16              nCurrPositiveFormat;
    sal_uInt16              nCurrNegativeFormat;
    sal_uInt16              nCurrDigits;
    bool                    bLocaleDataItemValid;
    bool                    bReservedWordValid;
    bool                    bSecondaryCalendarValid;
    mutable ::utl::ReadWriteMutex   aMutex;
    struct Locale_Compare
    {
        bool operator()(const css::lang::Locale& rLocale1, const css::lang::Locale& rLocale2) const;
    };
    mutable std::map<css::lang::Locale, css::i18n::LocaleDataItem, Locale_Compare> maDataItemCache;

                                // whenever Locale changes
    void                invalidateData();

    void                getOneLocaleItemImpl( sal_Int16 nItem );
    const OUString&     getOneLocaleItem( sal_Int16 nItem ) const;

    void                getOneReservedWordImpl( sal_Int16 nWord );
    const OUString&     getOneReservedWord( sal_Int16 nWord ) const;

    void                getCurrSymbolsImpl();
    void                getCurrFormatsImpl();

    void                scanCurrFormatImpl( const OUString& rCode,
                            sal_Int32 nStart, sal_Int32& nSign,
                            sal_Int32& nPar, sal_Int32& nNum,
                            sal_Int32& nBlank, sal_Int32& nSym );

    void                getDateOrdersImpl();
    DateOrder           scanDateOrderImpl( const OUString& rCode );

    void                getDefaultCalendarImpl();
    void                getSecondaryCalendarImpl();

    sal_Unicode*        ImplAddFormatNum( sal_Unicode* pBuf,
                            sal_Int64 nNumber, sal_uInt16 nDecimals,
                            bool bUseThousandSep, bool bTrailingZeros ) const;

    void                getDigitGroupingImpl();

public:
                                LocaleDataWrapper(
                                    const css::uno::Reference< css::uno::XComponentContext > & rxContext,
                                    const LanguageTag& rLanguageTag
                                    );
                                LocaleDataWrapper(
                                    const LanguageTag& rLanguageTag
                                    );
                                ~LocaleDataWrapper();

    /** Get the service factory, meant to be able to create a CalendarWrapper
        from a LocaleDataWrapper. Note that the service factory may be
        non-existent if this LocaleDataWrapper was created without one and
        lives "on the grassland". The CalendarWrapper ctor can handle that
        though. */
    const css::uno::Reference<
        css::uno::XComponentContext > & getComponentContext()
        const { return m_xContext; }

    /// set a new Locale to request
            void                setLanguageTag( const LanguageTag& rLanguageTag );

    /// get current requested Locale
    const   LanguageTag&        getLanguageTag() const;

    /// get current loaded Locale, which might differ from the requested Locale
    LanguageTag                 getLoadedLanguageTag() const;

    // Wrapper implementations of service LocaleData

    css::i18n::LanguageCountryInfo getLanguageCountryInfo() const;
    const css::i18n::LocaleDataItem& getLocaleItem() const;
    /// NOTE: this wraps XLocaleData3::getAllCalendars2() in fact.
    css::uno::Sequence< css::i18n::Calendar2 > getAllCalendars() const;
    /// NOTE: this wraps XLocaleData2::getAllCurrencies2() in fact.
    css::uno::Sequence< css::i18n::Currency2 > getAllCurrencies() const;
    css::uno::Sequence< css::i18n::FormatElement > getAllFormats() const;
    css::i18n::ForbiddenCharacters getForbiddenCharacters() const;
    css::uno::Sequence< OUString > getReservedWord() const;
    css::uno::Sequence< css::lang::Locale > getAllInstalledLocaleNames() const;
    css::uno::Sequence< OUString > getDateAcceptancePatterns() const;

    /** Override locale's date acceptance patterns.
        An empty sequence resets the patterns to the locale's pattern sequence.
     */
    void setDateAcceptancePatterns( const css::uno::Sequence< OUString > & rPatterns );

    /// same as the wrapper implementation but static
    static css::uno::Sequence< css::lang::Locale > getInstalledLocaleNames();

    /** Get LanguageTypes for all installed locales which are unambiguous
        convertible back and forth between locale ISO strings and MS-LCID
        LanguageType. Upon the first time the function is called when
        locale data checking is enabled, messages are shown for locales not
        matching, excluding already known problems.
        (e.g. used in number formatter dialog init)
     */
    static css::uno::Sequence< sal_uInt16 > getInstalledLanguageTypes();

    /// maps the LocaleData string to the International enum
    MeasurementSystem   mapMeasurementStringToEnum( const OUString& rMS ) const;

    /// Convenience method to obtain the default calendar.
    const std::shared_ptr< css::i18n::Calendar2 >& getDefaultCalendar() const;

    /// Convenience method to obtain the day names of the default calendar.
    const css::uno::Sequence< css::i18n::CalendarItem2 > getDefaultCalendarDays() const;

    /// Convenience method to obtain the month names of the default calendar.
    const css::uno::Sequence< css::i18n::CalendarItem2 > getDefaultCalendarMonths() const;

    /** If the secondary calendar, if any, is of the name passed AND number
        formats using it usually use the E or EE keyword (EC|EEC). */
    bool doesSecondaryCalendarUseEC( const OUString& rName ) const;

    /** Obtain digit grouping. The usually known grouping by thousands (#,###)
        is actually only one of possible groupings. Another one, for example,
        used in India is group by 3 and then by 2 indefinitely (#,##,###). The
        integer sequence returned here specifies grouping from right to left
        (!), with a 0 entry designating the end of rules and the previous value
        to be repeated indefinitely. Hence the sequence {3,0} specifies the
        usual grouping by thousands, whereas the sequence {3,2,0} specifies
        Indian grouping. The sal_Int32* getConstArray() can be passed directly
        to the ::rtl::math::doubleToString() methods as argument for the
        pGroups parameter. */
    const css::uno::Sequence< sal_Int32 > getDigitGrouping() const;

    // Functionality of class International methods, LocaleItem

    const OUString&       getDateSep() const
                                    { return getOneLocaleItem( css::i18n::LocaleItem::DATE_SEPARATOR ); }
    const OUString&       getNumThousandSep() const
                                    { return getOneLocaleItem( css::i18n::LocaleItem::THOUSAND_SEPARATOR ); }
    const OUString&       getNumDecimalSep() const
                                    { return getOneLocaleItem( css::i18n::LocaleItem::DECIMAL_SEPARATOR ); }
    const OUString&       getTimeSep() const
                                    { return getOneLocaleItem( css::i18n::LocaleItem::TIME_SEPARATOR ); }
    const OUString&       getTime100SecSep() const
                                    { return getOneLocaleItem( css::i18n::LocaleItem::TIME_100SEC_SEPARATOR ); }
    const OUString&       getListSep() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::LIST_SEPARATOR ); }
    const OUString&       getQuotationMarkStart() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::SINGLE_QUOTATION_START ); }
    const OUString&       getQuotationMarkEnd() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::SINGLE_QUOTATION_END ); }
    const OUString&       getDoubleQuotationMarkStart() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::DOUBLE_QUOTATION_START ); }
    const OUString&       getDoubleQuotationMarkEnd() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::DOUBLE_QUOTATION_END ); }
    MeasurementSystem     getMeasurementSystemEnum() const
                            { return mapMeasurementStringToEnum( getOneLocaleItem( css::i18n::LocaleItem::MEASUREMENT_SYSTEM ) ); }
    const OUString&       getTimeAM() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::TIME_AM ); }
    const OUString&       getTimePM() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::TIME_PM ); }
    const OUString&       getLongDateDayOfWeekSep() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::LONG_DATE_DAY_OF_WEEK_SEPARATOR ); }
    const OUString&       getLongDateDaySep() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::LONG_DATE_DAY_SEPARATOR ); }
    const OUString&       getLongDateMonthSep() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::LONG_DATE_MONTH_SEPARATOR ); }
    const OUString&       getLongDateYearSep() const
                            { return getOneLocaleItem( css::i18n::LocaleItem::LONG_DATE_YEAR_SEPARATOR ); }

    // currency
    const OUString&    getCurrSymbol() const;
    const OUString&    getCurrBankSymbol() const;
    sal_uInt16              getCurrPositiveFormat() const;
    sal_uInt16              getCurrNegativeFormat() const;
    sal_uInt16              getCurrDigits() const;

    // simple date and time formatting
    DateOrder          getDateOrder() const;
    DateOrder          getLongDateOrder() const;
    /// only numerical values of Gregorian calendar
    OUString       getDate( const Date& rDate ) const;
    OUString       getTime( const tools::Time& rTime, bool bSec = true,
                            bool b100Sec = false ) const;
    OUString       getDuration( const tools::Time& rTime,
                            bool bSec = true, bool b100Sec = false ) const;

                        /** The CalendarWrapper already <b>MUST</b>
                            have loaded a calendar.
                            @param bTwoDigitYear
                                <FALSE/> := full year
                                <TRUE/>  := year % 100
                         */
    OUString       getLongDate( const Date& rDate,
                            CalendarWrapper& rCal,
                            bool bTwoDigitYear
                            ) const;

                        /** Simple number formatting
                            @param nNumber
                                value * 10**nDecimals
                            @param bTrailingZeros
                            </sal_True>  := always display trailing zeros in
                                decimal places, even if integer value.
                            </sal_False> := trailing zeros are only displayed
                                if the value is not an integer value.
                         */
    OUString       getNum( sal_Int64 nNumber, sal_uInt16 nDecimals,
                            bool bUseThousandSep = true,
                            bool bTrailingZeros = true ) const;

                        /// "Secure" currency formatted string.
    OUString       getCurr( sal_Int64 nNumber, sal_uInt16 nDecimals,
                            const OUString& rCurrencySymbol,
                            bool bUseThousandSep = true ) const;

    // dummy returns, to be implemented
    sal_Unicode         getCurrZeroChar() const
                                    { return '0'; }
    static bool         isNumLeadingZero()
                                    { return true; }
                                /// standard decimal places
    static sal_uInt16    getNumDigits()
                                    { return 2; }
    static bool         isNumTrailingZeros()
                                    { return true; }

    // reserved words

    const OUString&        getTrueWord() const
                                    { return getOneReservedWord( css::i18n::reservedWords::TRUE_WORD ); }
    const OUString&        getFalseWord() const
                                    { return getOneReservedWord( css::i18n::reservedWords::FALSE_WORD ); }
    const OUString&        getAboveWord() const
                                    { return getOneReservedWord( css::i18n::reservedWords::ABOVE_WORD ); }
    const OUString&        getBelowWord() const
                                    { return getOneReservedWord( css::i18n::reservedWords::BELOW_WORD ); }
    /// return a quarter abbreviation string matching nQuarter (0..3) => "Q1" .. "Q2"
    const OUString&        getQuarterAbbreviation( sal_Int16 nQuarter ) const
                                    { return getOneReservedWord( css::i18n::reservedWords::QUARTER1_ABBREVIATION + nQuarter ); }

    /** Return whether locale data checks are enabled.
        Checks are enabled if the environment variable
        OOO_ENABLE_LOCALE_DATA_CHECKS is set to 'Y' or 'Yes' (or any other
        string starting with 'Y') or '1'.
        Also used in conjunction with the number formatter. */
    static  bool        areChecksEnabled()
                                    {
                                        if (nLocaleDataChecking == 0)
                                            evaluateLocaleDataChecking();
                                        return nLocaleDataChecking == 1;
                                    }

    /** Append locale info to string, used with locale data checking.
        A string similar to "de_DE requested\n en_US loaded" is appended. */
    OUString appendLocaleInfo(const OUString& rDebugMsg) const;

    /** Output a message during locale data checking. The (UTF-8) string is
        written to stderr and in a non-product build or if DBG_UTIL is enabled
        also raised as an assertion message box. */
    static  void                outputCheckMessage( const OUString& rMsg );
    static  void                outputCheckMessage( const char* pStr);

    LocaleDataWrapper(const LocaleDataWrapper&) = delete;
    LocaleDataWrapper& operator=(const LocaleDataWrapper&) = delete;

private:

    const css::lang::Locale &  getMyLocale() const;

    static  void                evaluateLocaleDataChecking();
};

#endif // INCLUDED_UNOTOOLS_LOCALEDATAWRAPPER_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */