#ifndef ADATE_H
#define ADATE_H
#include "src/opl.h"

const static auto ISO = QStringLiteral("yyyy-MM-dd");
const static auto DE = QStringLiteral("dd.MM.yyyy");
const static auto EN = QStringLiteral("MM/dd/yyyy");

const static QMap<OPL::DateFormat, QString> ADATEFORMATSMAP = {
    {OPL::DateFormat::ISODate, ISO},
    {OPL::DateFormat::DE,      DE },
    {OPL::DateFormat::EN,      EN },

};

const static QStringList DISPLAY_NAMES = {
    QStringLiteral("ISO 8601: yyyy-MM-dd"),
    QStringLiteral("DE: dd.MM.yyyy"),
    QStringLiteral("EN: MM/dd/yyyy")
};

/*!
 * \brief The ADate class is responsible for input/output of Dates and handling the different
 * Date Formats.
 */
class ADate
{
public:
    /*!
     * \brief takes a user-provided input and tries to convert it to a (valid) QDate.
     * \return QDate (invalid if input not recognized)
     */
    static QDate parseInput(QString &io_user_input, OPL::DateFormat format);

    static void tryToFix(QString &io_user_input, OPL::DateFormat format);

    /*!
     * \brief padCentury adds the century to a date where it was omitted
     */
    static void padCentury(QString &io_user_input, OPL::DateFormat format);

    /*!
     * \brief pads a user-provided date string with 0s to facilitate conversion to QDate
     */
    static void padZeroes(QString &io_user_input);

    static void addSeperators(QString &io_user_input, const OPL::DateFormat &format);

    static bool containsSeperator(const QString &user_input);

    /*!
     * \brief Reimplements QDate::toString to accept OPL::Date::ADateFormat enums
     */
    inline static QString toString(const QDate &date, OPL::DateFormat format = OPL::DateFormat::ISODate)
    {
        return date.toString(ADATEFORMATSMAP.value(format));
    };

    static const QStringList& getDisplayNames();

    static const QString getFormatString(OPL::DateFormat format);

    /*!
     * \brief today Returns a string containing the current date in ISO format
     * \return
     */
    static const QString currentDate();

};

#endif // ADATE_H