/***************************************************************************
 *   Copyright (C) 2008 by S. MANKOWSKI / G. DE BURE support@mankowski.fr  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   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, see <http://www.gnu.org/licenses/>  *
 ***************************************************************************/
#ifndef SKGSERVICES_H
#define SKGSERVICES_H
/** @file
 * This file defines classes SKGServices.
 *
 * @author Stephane MANKOWSKI / Guillaume DE BURE
 */
#include <KUrl>

#include <QStringList>
#include <QHash>
#include <QDateTime>
#include <QIcon>

#include "skgerror.h"
#include "skgdefine.h"
#include "skgbasemodeler_export.h"

/**
 * @var SQLLITEERROR
 * Must be used to generate a SKGError on an error coming from sqlite's API
 * Example of usage:
 * @code
 * int rc=QSqlDatabase_close ( currentDatabase );
 * if(rc!=SQLITE_OK) err=SKGError(SQLLITEERROR+rc, QSqlDatabase_errmsg(currentDatabase));
 * @see SKGError
 * @endcode

 */
static const int SQLLITEERROR = 10000;

class QSqlDatabase;
class QTextStream;
class QDomDocument;

/**
 * A map of strings ==> SKGQStringQStringMap
 */
typedef QHash<QString, QString> SKGQStringQStringMap;

/**
 * the iterator for SKGQStringQStringMap
 */
typedef QHash<QString, QString>::Iterator SKGQStringQStringMapIterator;

/**
 * A list of QStringList ==> SKGStringListList
 */
typedef QList<QStringList> SKGStringListList;

/**
 * the iterator for SKGStringListList
 */
typedef QList<QStringList>::Iterator SKGStringListListIterator;

/**
 * A list of int ==> SKGIntList
 */
typedef QList<int> SKGIntList;

/**
 * the iterator for SKGIntList
 */
typedef QList<int>::Iterator SKGIntListIterator;

/**
* This class containing various static services
*/
class SKGBASEMODELER_EXPORT SKGServices : public QObject
{
    Q_OBJECT
    /**
     * This enumerate defines dump modes
     */
    Q_ENUMS(DumpMode)
    /**
     * This enumerate defines attributes types
     */
    Q_ENUMS(AttributeType)
public:
    /**
     * Unit value
     */
    typedef struct {
        /** The name of the unit */
        QString Name;
        /** The amount of the unit */
        double Value;
        /** The number of decimal of the unit*/
        int NbDecimal;

        /** The symbol of the unit */
        QString Symbol;
        /** The country of the unit */
        QString Country;
        /** The Internet code of the unit */
        QString Internet;
        /** The download source */
        QString Source;
        /** The parent unit of the unit */
        QString Parent;
        /** The date of the unit */
        QDate Date;
    } SKGUnitInfo;

    /**
     * This structure defines attributes types
     */
    enum AttributeType {
        TEXT,       /**< Text */
        INTEGER,    /**< Integer */
        FLOAT,      /**< Float */
        DATE,       /**< Date */
        ID,         /**< Unique identifier */
        LINK,       /**< Link */
        BLOB,       /**< Blob */
        BOOL,       /**< Boolean (Y, N) */
        TRISTATE,   /**< Tri-state (N, P, C) */
        OTHER           /**< Other or undefined */
    };

    /**
     * Describe an attribute
     */
    struct SKGAttributeInfo {
        QString name;           /**< The internal name of the attribute */
        QString display;        /**< The name for display of the attribute */
        QIcon icon;                 /**< The icon for display of the attribute */
        AttributeType type;         /**< The type of the attribute */
        bool notnull;           /**< To know if the attribute can be null or not */
        QString defaultvalue;       /**< The default value of the attribute */
    };

    /**
     * Search criteria
     */
    struct SKGSearchCriteria {
        QChar mode;              /**< The mode '+' or '-' */
        QStringList words;       /**< The list of words */
    };

    /**
     * A list of SKGAttributeInfo ==> SKGAttributesList
     */
    typedef QList<SKGAttributeInfo> SKGAttributesList;

    /**
     * the iterator for SKGAttributesList
     */
    typedef QList<SKGAttributeInfo>::Iterator SKGAttributesListIterator;

    /**
     * This enumerate defines dump modes
     */
    enum DumpMode {
        DUMP_CSV, /**< To dump in CSV mode */
        DUMP_TEXT  /**< To dump in DUMP_TEXT mode */
    };

    /**
     * Get list of search criteria of a string (exxample: +cat1 -abc +auto)
     * @param iString a string to analyze
     * @return the search criteria list
     */
    static QList<SKGSearchCriteria> stringToSearchCriterias(const QString& iString);

    /**
     * Get environment variable
     * @param iAttribute name of the variable
     * @return value of the variable
     */
    static QString getEnvVariable(const QString& iAttribute);

    /**
     * Convert a integer into a QString
     * @param iNumber the integer to convert
     * @return the converted QString
     */
    static QString intToString(qlonglong iNumber);

    /**
     * Convert a QString into an integer
     * @param iNumber the QString to convert
     * @return the converted integer
     */
    static qlonglong stringToInt(const QString& iNumber);

    /**
     * Convert a QString into a csv QString
     * @param iNumber the QString to convert
     * @return the converted csv string
     */
    static QString stringToCsv(const QString& iNumber);

    /**
     * Convert a QStringList into a csv QString
     * @param iList the QStringList to convert
     * @param iSeparator the separator
     * @return the converted csv string
     */
    static QString stringsToCsv(const QStringList& iList, const QChar& iSeparator = ';');

    /**
     * Convert a QString to a html QString
     * @param iString the QString to convert
     * @return the converted html string
     */
    static QString stringToHtml(const QString& iString);

    /**
     * Convert a html QString to a QString
     * @param iString the QString to convert
     * @return the converted string
     */
    static QString htmlToString(const QString& iString);

    /**
     * Convert a double into a QString
     * @param iNumber the double to convert
     * @return the converted QString
     */
    static QString doubleToString(double iNumber);

    /**
     * Convert a QString into an double
     * @param iNumber the QString to convert
     * @return the converted double
     */
    static double stringToDouble(const QString& iNumber);

    /**
     * Convert a QDateTime into a QString ready for sql order.
     * The output format is "%Y-%m-%d %H-%M-%S"
     * @param iDateTime the time
     * @return the converted QString
     */
    static QString timeToString(const QDateTime& iDateTime);

    /**
     * Compute the number of working days between two dates.
     * @param iFrom first date
     * @param iTo seconde date
     * @return the number of working days.
     */
    static int nbWorkingDays(const QDate& iFrom, const QDate& iTo);

    /**
     * Convert a QString to QDateTime.
     * @param iDateString the time. The format must be "%Y-%m-%d %H-%M-%S" or "%Y-%m-%d"
     * @return the converted time_t
     */
    static QDateTime stringToTime(const QString& iDateString);

    /**
     * Convert a QDateTime into a QString ready for sql order.
     * The output format is "%Y-%m-%d"
     * @param iDateTime the time
     * @return the converted QString
     */
    static QString dateToSqlString(const QDateTime& iDateTime);

    /**
     * Format a date.
     * The output format is "YYYY-MM-DD"
     * @param iDate the QString representing the input date
     * @param iFormat the format of the input date. Must be in the following list:
     * "YYYYMMDD","DDMMYYYY", "MMDDYYYY" "YYYY-MM-DD"
     * "MM/DD/YY", "MM-DD-YY", "DD/MM/YY", "DD-MM-YY"
     * "MM/DD/YYYY", "MM-DD-YYYY", "DD/MM/YYYY", "DD-MM-YYYY"
     * @return the converted QString
     */
    static QString dateToSqlString(const QString& iDate, const QString& iFormat);

    /**
     * Get the format of a list of string dates
     * @param iDates a list of string dates
     * @return the supported format of all of these dates.
     */
    static QString getDateFormat(const QStringList& iDates);

    /**
     * Return string ready for sql order
     * @param iString the string
     * @return the escaped string
     */
    static QString stringToSqlString(const QString& iString);

    /**
     * Split a csv line
     * @param iString the csv line
     * @param iSeparator the csv separator
     * @param iCoteDefineBlock to indicate if the character double cote define a block
     * @param oRealSeparator the real csv separator. If the csv string is strictly all enclosed then oRealSeparator will contain the real separator
     * @return the list of all values in this csv line. Return an empty list if some cote are opened and not closed
     */
    static QStringList splitCSVLine(const QString& iString, const QChar& iSeparator = ';', bool iCoteDefineBlock = true, QChar* oRealSeparator = NULL);

    /**
     * To dump a table
     * @param iTable A table
     * @param iMode dump mode
     * @return the dump of the table
     */
    static QStringList tableToDump(const SKGStringListList& iTable, SKGServices::DumpMode iMode);

    /**
     * Get the table name corresponding to a table or a view
     * @param iTable table or view
     * @return table name corresponding
     */
    static QString getRealTable(const QString& iTable);

    /**
     * Copy a sqlite database from memory to file or from file to memory.
     * It's used to do a load or a save
     * @param iFileDb the sqlite pointer corresponding to a file database
     * @param iMemoryDb the sqlite pointer corresponding to  memory database
     * @param iFromFileToMemory
     *        true: the copy is done from iFileDb to iMemoryDb (needed of a load)
     *        false: the copy is done from iMemoryDb to iFileDb (needed of a save)
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError copySqliteDatabase(QSqlDatabase* iFileDb, QSqlDatabase* iMemoryDb, bool iFromFileToMemory);

    /**
     * Copy a sqlite database into an XML document.
     * @param iDb the sqlite pointer corresponding to database
     * @param oDocument the xml document
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError copySqliteDatabaseToXml(QSqlDatabase* iDb, QDomDocument& oDocument);

    /**
     * Execute a sqlite orders
     * @param iDb a database pointer
     * @param iSqlOrders the sql orders
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError executeSqliteOrders(QSqlDatabase* iDb, const QStringList& iSqlOrders);

    /**
     * Execute a sqlite order
     * @param iDb a database pointer
     * @param iSqlOrder the sql order
     * @param iBind the binded variables and values
     * @param iLastId to retrieve the id of the last created object
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError executeSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, const QMap<QString, QVariant>& iBind, int* iLastId = NULL);

    /**
     * Execute a sqlite order
     * @param iDb a database pointer
     * @param iSqlOrder the sql order
     * @param iLastId to retrieve the id of the last created object
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError executeSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, int* iLastId = NULL);

    /**
    * Execute a select sqlite order and return the result in @p oResult
    * @param iDb A database pointer
    * @param iSqlOrder the sql order
    * @param oResult the result of the select. It's a vector of vector of QString
    * @return An object managing the error
    *   @see SKGError
    */
    static SKGError executeSelectSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, SKGStringListList& oResult);

    /**
    * dump a select sqlite order
    * @param iDb A database pointer
    * @param iSqlOrder the sql order
    * @param oStream the output stream, NULL for std output (cout)
    * @param iMode dump mode
    * @return An object managing the error
    *   @see SKGError
    */
    static SKGError dumpSelectSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, QTextStream* oStream = NULL, SKGServices::DumpMode iMode = DUMP_TEXT);

    /**
     * dump a select sqlite order
     * @param iDb A database pointer
     * @param iSqlOrder the sql order
     * @param oResult the output
     * @param iMode dump mode
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError dumpSelectSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, QString& oResult, SKGServices::DumpMode iMode = DUMP_TEXT);

    /**
     * dump a select sqlite order
     * @param iDb A database pointer
     * @param iSqlOrder the sql order
     * @param oResult the output
     * @param iMode dump mode
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError dumpSelectSqliteOrder(QSqlDatabase* iDb, const QString& iSqlOrder, QStringList& oResult, SKGServices::DumpMode iMode = DUMP_TEXT);

    /**
     * Read a property file
     * @param iFileName A file name
     * @param oProperties the properties
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError readPropertyFile(const QString& iFileName, QHash<QString, QString>& oProperties);

    /**
     * Return the current time in millisecond
     * @return current
     */
    static double getMicroTime();

    /**
     * Encrypt or decrypt a file
     * @param iFileSource source file
     * @param iFileTarget target file
     * @param iPassword password
     * @param iEncrypt true to encrypt, false to decrypt
     * @param iHeaderFile the header file (useful for a magic mime type)
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError cryptFile(const QString& iFileSource, const QString& iFileTarget,
                              const QString& iPassword, bool iEncrypt = true, const QString& iHeaderFile = "");

    /**
     * Download a non local URL to a string
     * @param iSourceUrl the non local URL
     * @param oStream the downloaded string
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError downloadToStream(const KUrl& iSourceUrl, QByteArray& oStream);

    /**
     * Download a non local URL to a temporary file
     * @param iSourceUrl the non local URL
     * @param oTemporaryFile a temporary file. You have to delete it
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError download(const KUrl& iSourceUrl, QString& oTemporaryFile);

    /**
     * Upload from a source to a destination
     * @param iSourceUrl the source
     * @param iDescUrl the destination
     * @return An object managing the error
     *   @see SKGError
     */
    static SKGError upload(const KUrl& iSourceUrl, const KUrl& iDescUrl);

    /**
     * To enable, disable sql traces
     */
    static int SKGSqlTraces;

    /**
     * Create a table with all values expressed in % of the column
     * @param iTable table
     * @param iOfColumns false to compute percentage of lines, true to compute perceentage of columns
     * @param iAbsolute transform all values in absolute
     * @return the table
     */
    static SKGStringListList getPercentTable(const SKGStringListList& iTable, bool iOfColumns = true, bool iAbsolute = false);

    /**
     * Create a table in base 100
     * @param iTable table
     * @return the table
     */
    static SKGStringListList getBase100Table(const SKGStringListList& iTable);

    /**
     * Create an historized table.
     * Each column is the sum of previous ones
     * @param iTable table
     * @return the table
     */
    static SKGStringListList getHistorizedTable(const SKGStringListList& iTable);

    /**
     * Encode a string for an url
     * @param iString the decoded string
     * @return the encoded string
     */
    static QString encodeForUrl(const QString& iString);

private:
    Q_DISABLE_COPY(SKGServices)
    static SKGError m_lastCallbackError;
};
#endif
