/*
    SPDX-FileCopyrightText: 2003-2005 Anders Lund <anders@alweb.dk>
    SPDX-FileCopyrightText: 2001-2010 Christoph Cullmann <cullmann@kde.org>
    SPDX-FileCopyrightText: 2001 Charles Samuels <charles@kde.org>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#ifndef KATE_CMDS_H
#define KATE_CMDS_H

#include <KTextEditor/Command>

#include <QStringList>

class KCompletion;

/**
 * The KateCommands namespace collects subclasses of KTextEditor::Command
 * for specific use in kate.
 */
namespace KateCommands
{
/**
 * This KTextEditor::Command provides access to a lot of the core functionality
 * of kate part, settings, utilities, navigation etc.
 * it needs to get a kateview pointer, it will cast the kate::view pointer
 * hard to kateview
 */
class CoreCommands : public KTextEditor::Command
{
    CoreCommands()
        : KTextEditor::Command({QStringLiteral("indent"),
                                QStringLiteral("unindent"),
                                QStringLiteral("cleanindent"),
                                QStringLiteral("fold"),
                                QStringLiteral("tfold"),
                                QStringLiteral("unfold"),
                                QStringLiteral("comment"),
                                QStringLiteral("uncomment"),
                                QStringLiteral("goto"),
                                QStringLiteral("kill-line"),
                                QStringLiteral("set-tab-width"),
                                QStringLiteral("set-replace-tabs"),
                                QStringLiteral("set-show-tabs"),
                                QStringLiteral("set-indent-width"),
                                QStringLiteral("set-indent-mode"),
                                QStringLiteral("set-auto-indent"),
                                QStringLiteral("set-line-numbers"),
                                QStringLiteral("set-folding-markers"),
                                QStringLiteral("set-icon-border"),
                                QStringLiteral("set-indent-pasted-text"),
                                QStringLiteral("set-word-wrap"),
                                QStringLiteral("set-word-wrap-column"),
                                QStringLiteral("set-replace-tabs-save"),
                                QStringLiteral("set-remove-trailing-spaces"),
                                QStringLiteral("set-highlight"),
                                QStringLiteral("set-mode"),
                                QStringLiteral("set-show-indent"),
                                QStringLiteral("print")})
    {
    }

    static CoreCommands *m_instance;

public:
    ~CoreCommands() override
    {
        m_instance = nullptr;
    }

    /**
     * execute command
     * @param view view to use for execution
     * @param cmd cmd string
     * @param errorMsg error to return if no success
     * @return success
     */
    bool exec(class KTextEditor::View *view, const QString &cmd, QString &errorMsg);

    /**
     * execute command on given range
     * @param view view to use for execution
     * @param cmd cmd string
     * @param errorMsg error to return if no success
     * @param range range to execute command on
     * @return success
     */
    bool
    exec(class KTextEditor::View *view, const QString &cmd, QString &errorMsg, const KTextEditor::Range &range = KTextEditor::Range(-1, -0, -1, 0)) override;

    bool supportsRange(const QString &range) override;

    /** This command does not have help. @see KTextEditor::Command::help */
    bool help(class KTextEditor::View *, const QString &, QString &) override;

    /** override from KTextEditor::Command */
    KCompletion *completionObject(KTextEditor::View *, const QString &) override;

    static CoreCommands *self()
    {
        if (m_instance == nullptr) {
            m_instance = new CoreCommands();
        }
        return m_instance;
    }
};

/**
 * insert a unicode or ascii character
 * base 9+1: 1234
 * hex: 0x1234 or x1234
 * octal: 01231
 *
 * prefixed with "char:"
 **/
class Character : public KTextEditor::Command
{
    Character()
        : KTextEditor::Command({QStringLiteral("char")})
    {
    }

    static Character *m_instance;

public:
    ~Character() override
    {
        m_instance = nullptr;
    }

    /**
     * execute command
     * @param view view to use for execution
     * @param cmd cmd string
     * @param errorMsg error to return if no success
     * @return success
     */
    bool
    exec(class KTextEditor::View *view, const QString &cmd, QString &errorMsg, const KTextEditor::Range &range = KTextEditor::Range(-1, -0, -1, 0)) override;

    /** This command does not have help. @see KTextEditor::Command::help */
    bool help(class KTextEditor::View *, const QString &, QString &) override;

    static Character *self()
    {
        if (m_instance == nullptr) {
            m_instance = new Character();
        }
        return m_instance;
    }
};

/**
 * insert the current date/time in the given format
 */
class Date : public KTextEditor::Command
{
    Date()
        : KTextEditor::Command({QStringLiteral("date")})
    {
    }

    static Date *m_instance;

public:
    ~Date() override
    {
        m_instance = nullptr;
    }

    /**
     * execute command
     * @param view view to use for execution
     * @param cmd cmd string
     * @param errorMsg error to return if no success
     * @return success
     */
    bool
    exec(class KTextEditor::View *view, const QString &cmd, QString &errorMsg, const KTextEditor::Range &range = KTextEditor::Range(-1, -0, -1, 0)) override;

    /** This command does not have help. @see KTextEditor::Command::help */
    bool help(class KTextEditor::View *, const QString &, QString &) override;

    static Date *self()
    {
        if (m_instance == nullptr) {
            m_instance = new Date();
        }
        return m_instance;
    }
};

class EditingCommands : public KTextEditor::Command
{
public:
    EditingCommands();

    static EditingCommands *s_instance;
    static EditingCommands *self()
    {
        if (!s_instance) {
            s_instance = new EditingCommands;
        }
        return s_instance;
    }

    struct EditingCommand {
        QString name;
        QString cmd;
    };

    QList<EditingCommand> allCommands();

    bool help(class KTextEditor::View *, const QString &cmd, QString &msg) override;

    bool
    exec(class KTextEditor::View *view, const QString &cmd, QString &errorMsg, const KTextEditor::Range &range = KTextEditor::Range(-1, -0, -1, 0)) override;

    bool supportsRange(const QString &) override
    {
        return true;
    }
};

} // namespace KateCommands
#endif