/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 */

#include <QCheckBox>
#include <QDialog>
#include <QHeaderView>
#include <QLineEdit>
#include <QMainWindow>
#include <QPushButton>
#include <QSettings>
#include <QSplitter>
#include <QStyledItemDelegate>
#include <QTextBrowser>
#include <QTreeWidget>

#include "expr.h"

class ConfigList;
class ConfigItem;
class ConfigMainWindow;

class ConfigSettings : public QSettings {
public:
        ConfigSettings();
        ~ConfigSettings(void);
        QList<int> readSizes(const QString& key, bool *ok);
        bool writeSizes(const QString& key, const QList<int>& value);
};

enum colIdx {
        promptColIdx, nameColIdx, dataColIdx
};
enum listMode {
        singleMode, menuMode, symbolMode, fullMode, listMode
};
enum optionMode {
        normalOpt = 0, allOpt, promptOpt
};

class ConfigList : public QTreeWidget {
        Q_OBJECT
        typedef class QTreeWidget Parent;
public:
        ConfigList(QWidget *parent, const char *name = 0);
        ~ConfigList();
        void reinit(void);
        ConfigItem* findConfigItem(struct menu *);
        void setSelected(QTreeWidgetItem *item, bool enable) {
                for (int i = 0; i < selectedItems().size(); i++)
                        selectedItems().at(i)->setSelected(false);

                item->setSelected(enable);
        }

protected:
        void keyPressEvent(QKeyEvent *e);
        void mouseReleaseEvent(QMouseEvent *e);
        void mouseDoubleClickEvent(QMouseEvent *e);
        void focusInEvent(QFocusEvent *e);
        void contextMenuEvent(QContextMenuEvent *e);

public slots:
        void setRootMenu(struct menu *menu);

        void updateList();
        void setValue(ConfigItem* item, tristate val);
        void changeValue(ConfigItem* item);
        void updateSelection(void);
        void saveSettings(void);
        void setOptionMode(QAction *action);
        void setShowName(bool on);

signals:
        void menuChanged(struct menu *menu);
        void menuSelected(struct menu *menu);
        void itemSelected(struct menu *menu);
        void parentSelected(void);
        void gotFocus(struct menu *);
        void showNameChanged(bool on);

public:
        void updateListAll(void)
        {
                updateAll = true;
                updateList();
                updateAll = false;
        }
        void setAllOpen(bool open);
        void setParentMenu(void);

        bool menuSkip(struct menu *);

        void updateMenuList(ConfigItem *parent, struct menu*);
        void updateMenuList(struct menu *menu);

        bool updateAll;

        bool showName;
        enum listMode mode;
        enum optionMode optMode;
        struct menu *rootEntry;
        QPalette disabledColorGroup;
        QPalette inactivedColorGroup;
        QMenu* headerPopup;

        static QList<ConfigList *> allLists;
        static void updateListForAll();
        static void updateListAllForAll();

        static QAction *showNormalAction, *showAllAction, *showPromptAction;
};

class ConfigItem : public QTreeWidgetItem {
        typedef class QTreeWidgetItem Parent;
public:
        ConfigItem(ConfigList *parent, ConfigItem *after, struct menu *m)
        : Parent(parent, after), nextItem(0), menu(m), goParent(false)
        {
                init();
        }
        ConfigItem(ConfigItem *parent, ConfigItem *after, struct menu *m)
        : Parent(parent, after), nextItem(0), menu(m), goParent(false)
        {
                init();
        }
        ConfigItem(ConfigList *parent, ConfigItem *after)
        : Parent(parent, after), nextItem(0), menu(0), goParent(true)
        {
                init();
        }
        ~ConfigItem(void);
        void init(void);
        void updateMenu(void);
        void testUpdateMenu(void);
        ConfigList* listView() const
        {
                return (ConfigList*)Parent::treeWidget();
        }
        ConfigItem* firstChild() const
        {
                return (ConfigItem *)Parent::child(0);
        }
        ConfigItem* nextSibling()
        {
                ConfigItem *ret = NULL;
                ConfigItem *_parent = (ConfigItem *)parent();

                if(_parent) {
                        ret = (ConfigItem *)_parent->child(_parent->indexOfChild(this)+1);
                } else {
                        QTreeWidget *_treeWidget = treeWidget();
                        ret = (ConfigItem *)_treeWidget->topLevelItem(_treeWidget->indexOfTopLevelItem(this)+1);
                }

                return ret;
        }
        // TODO: Implement paintCell

        ConfigItem* nextItem;
        struct menu *menu;
        bool goParent;

        static QIcon symbolYesIcon, symbolModIcon, symbolNoIcon;
        static QIcon choiceYesIcon, choiceNoIcon;
        static QIcon menuIcon, menubackIcon;
};

class ConfigItemDelegate : public QStyledItemDelegate
{
private:
        struct menu *menu;
public:
        ConfigItemDelegate(QObject *parent = nullptr)
                : QStyledItemDelegate(parent) {}
        QWidget *createEditor(QWidget *parent,
                              const QStyleOptionViewItem &option,
                              const QModelIndex &index) const override;
        void setModelData(QWidget *editor, QAbstractItemModel *model,
                          const QModelIndex &index) const override;
};

class ConfigInfoView : public QTextBrowser {
        Q_OBJECT
        typedef class QTextBrowser Parent;
        QMenu *contextMenu;
public:
        ConfigInfoView(QWidget* parent, const char *name = 0);
        bool showDebug(void) const { return _showDebug; }

public slots:
        void setInfo(struct menu *menu);
        void saveSettings(void);
        void setShowDebug(bool);
        void clicked (const QUrl &url);

signals:
        void showDebugChanged(bool);
        void menuSelected(struct menu *);

protected:
        void symbolInfo(void);
        void menuInfo(void);
        QString debug_info(struct symbol *sym);
        static QString print_filter(const QString &str);
        static void expr_print_help(void *data, struct symbol *sym, const char *str);
        void contextMenuEvent(QContextMenuEvent *event);

        struct symbol *sym;
        struct menu *_menu;
        bool _showDebug;
};

class ConfigSearchWindow : public QDialog {
        Q_OBJECT
        typedef class QDialog Parent;
public:
        ConfigSearchWindow(ConfigMainWindow *parent);

public slots:
        void saveSettings(void);
        void search(void);

protected:
        QLineEdit* editField;
        QPushButton* searchButton;
        QSplitter* split;
        ConfigList *list;
        ConfigInfoView* info;

        struct symbol **result;
};

class ConfigMainWindow : public QMainWindow {
        Q_OBJECT

        QString configname;
        static QAction *saveAction;
        static void conf_changed(bool);
public:
        ConfigMainWindow(void);
public slots:
        void changeMenu(struct menu *);
        void changeItens(struct menu *);
        void setMenuLink(struct menu *);
        void listFocusChanged(void);
        void goBack(void);
        void loadConfig(void);
        bool saveConfig(void);
        void saveConfigAs(void);
        void searchConfig(void);
        void showSingleView(void);
        void showSplitView(void);
        void showFullView(void);
        void showIntro(void);
        void showAbout(void);
        void saveSettings(void);

protected:
        void closeEvent(QCloseEvent *e);

        ConfigSearchWindow *searchWindow;
        ConfigList *menuList;
        ConfigList *configList;
        ConfigInfoView *helpText;
        QAction *backAction;
        QAction *singleViewAction;
        QAction *splitViewAction;
        QAction *fullViewAction;
        QSplitter *split1;
        QSplitter *split2;
};