#ifndef NAVIGATIONCONTROLLER_H
#define NAVIGATIONCONTROLLER_H

#include <QObject>
#include <QQmlContext>

class NavigationItemModel;
class NavigationListModel;
class UiStateModel;
class MusicPlayer;

/**
 * @brief Main controller controlling ui state, navigation and music player.
 */
class NavigationController : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QString pDebugOutput READ getDebugOutput NOTIFY debugOutputChanged)

signals:
    void debugOutputChanged();

public:
    explicit NavigationController(QObject *parent = nullptr);

    /**
     * @brief Setup navigation model parsing all directories under rootPath
     * @param rootPath path to root directory containing music
     */
    void init(const QString & rootPath);
    /**
     * @brief Set ui profile
     * @param profileString String defining profile
     * @see UiStateModel::setProfile(const QString& profileString)
     */
    void setUiProfile(const QString& profileString);

    /**
     * @brief setContext set QML Context and context properties
     * @param context QmlContext
     * @see setContextProperties
     */
    void setContext(QQmlContext* context);

    QString getDebugOutput() const { return mDebugOutput; }

private:
    /**
     * @brief Register models in context
     */
    void setContextProperties();
    /**
     * @brief Add a directory and its subdirectories to navigation
     * @param path Path to directory
     * @param parentItem Parent directory
     */
    void add(const QString & path, NavigationItemModel* parentItem);
    /**
     * @brief Check whether directory contains either a subdirectory or flac or mp3 music files
     * @param path path to directory
     * @return true if directory is valid
     */
    bool checkContent(const QString& path);

    /**
     * @brief Set Debug Output. Necessary as Android Debugger does not work yet
     * @param text Output to show in ui
     */
    void setDebugOutput(const QString& text);

    NavigationItemModel* mRootItem;
    NavigationListModel* mNavList;

    UiStateModel* mUiState;
    MusicPlayer* mMediaPlayer;

    QString mRootPath = ".";

    QString mDebugOutput;

    QQmlContext* mContext = nullptr;

private slots:
    /**
     * @brief Either show subdirectories or music player depending on current directory type
     */
    void onNavigationRequest();
    void startOrStopEnergySaverDependingOnPlayerState();
};

#endif // NAVIGATIONCONTROLLER_H