#ifndef ALPM_MANAGER_H
#define ALPM_MANAGER_H

#include "./upgradelookup.h"
#include "./alpmpackage.h"

#include <QJsonObject>
#include <QJsonArray>
#include <QMutex>
#include <QAtomicInteger>
#include <QObject>

#include <map>
#include <memory>

QT_FORWARD_DECLARE_CLASS(QTimer)

namespace RepoIndex {

class Config;
class UserRepository;
class AlpmDatabase;
enum class RepositoryUsage;

class Manager : public QObject
{
Q_OBJECT

public:
    enum PackageInfoPart {
        None = 0x0,
        Basics = 0x1,
        Details = 0x2,
    };
    Q_DECLARE_FLAGS(PackageInfoParts, PackageInfoPart)

    explicit Manager(const Config &config, QObject *parent = nullptr);
    ~Manager();

    // configuration, signature level, etc
    const Config &config() const;
    SignatureLevel sigLevel() const;
    void setSigLevel(SignatureLevel sigLevel);
    SignatureLevel localFileSigLevel() const;
    void setLocalFileSigLevel(SignatureLevel sigLevel);
    const QString &pacmanCacheDir() const;
    static SignatureLevel parseSigLevel(const std::string &sigLevelStr = std::string());
    static RepositoryUsage parseUsage(const std::string &usageStr);
    void addLocalDatabase();
    void removeAllDatabases();
    void addDataBasesFromPacmanConfig();
    void addDatabasesFromRepoIndexConfig();
    void initAlpmDataBases();
    void computeRequiredBy(Repository *repo);

    // caching
    bool writeCacheBeforeGone() const;
    void setWriteCacheBeforeGone(bool writeCacheBeforeGone);
    bool isAutoCacheMaintenanceEnabled() const;
    void setAutoCacheMaintenanceEnabled(bool enabled);
    Q_SLOT void writeCache();
    Q_SLOT void restoreCache();
    Q_SLOT void cleanCache();
    Q_SLOT void wipeCache();
    Q_SLOT void maintainCache();

    // updating
    bool isAutoUpdateEnabled() const;
    void setAutoUpdateEnabled(bool enabled);
    Q_SLOT void updateAlpmDatabases();
    Q_SLOT void forceUpdateAlpmDatabases();

    // package lookup
    AlpmPackage *packageFromDatabase(const QString &dbName, const QString &pkgName);
    const AlpmPackage *packageFromDatabase(const QString &dbName, const QString &pkgName) const;
    AlpmPackage *packageFromSyncDatabases(const QString &pkgName);
    const AlpmPackage *packageFromSyncDatabases(const QString &pkgName) const;
    Package *packageProviding(const Dependency &dependency);
    const Package *packageProviding(const Dependency &dependency) const;

    // repository lookup
    const AlpmDatabase *localDatabase() const;
    AlpmDatabase *localDatabase();
    const std::map<QString, AlpmDatabase *> &syncDatabases() const;
    const AlpmDatabase *databaseByName(const QString &dbName) const;
    AlpmDatabase *databaseByName(const QString &dbName);
    const Repository *repositoryByName(const QString &name) const;
    Repository *repositoryByName(const QString &name);
    const UserRepository *userRepository() const;
    UserRepository *userRepository();
    QString findDatabasePath(const QString &name, bool updatesRequired, bool printError) const;
    QString proposedDatabasePath(const QString &name, bool files) const;

    // JSON serialization, handling JSON requests
    const QJsonObject &basicRepoInfo() const;
    QJsonArray packageInfo(const QJsonObject &pkgSelection, PackageInfoPart part) const;
    const QJsonArray &groupInfo() const;

Q_SIGNALS:
    void updatesAvailable();

private Q_SLOTS:
    void invalidateCachedJsonSerialization();
    void emitUpdatesAvailable();

private:
    void connectRepository(Repository *repo);

private:
    const Config &m_config;
    bool m_writeCacheBeforeGone;
    std::unique_ptr<QTimer> m_cacheTimer;
    std::unique_ptr<QTimer> m_updateTimer;
    SignatureLevel m_sigLevel;
    SignatureLevel m_localFileSigLevel;
    QString m_pacmanCacheDir;
    std::unique_ptr<UserRepository> m_userRepo;
    std::unique_ptr<AlpmDatabase> m_localDb;
    std::list<std::unique_ptr<AlpmDatabase> > m_syncDbs;
    std::map<QString, AlpmDatabase *> m_syncDbMap;
    mutable QJsonObject m_basicRepoInfo;
    mutable QMutex m_basicRepoInfoMutex;
    mutable QJsonArray m_groupInfo;
    mutable QMutex m_groupInfoMutex;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(Manager::PackageInfoParts)

/*!
 * \brief Returns the configuration of the manager.
 * \remarks The configuration has been specified when constructing the manager.
 */
inline const Config &Manager::config() const
{
    return m_config;
}

/*!
 * \brief Returns whether the manager writes cache files for all relevant repositories before the manager is
 *        gone (out of scope, deleted, ...).
 * \sa setWriteCacheBeforeGone()
 */
inline bool Manager::writeCacheBeforeGone() const
{
    return m_writeCacheBeforeGone;
}

/*!
 * \brief Sets whether the manager writes cache files for all relevant repositories before the manager is
 *        gone (out of scope, deleted, ...).
 * \sa writeCacheBeforeGone()
 */
inline void Manager::setWriteCacheBeforeGone(bool writeCacheBeforeGone)
{
    m_writeCacheBeforeGone = writeCacheBeforeGone;
}

/*!
 * \brief Returns the signature level.
 *
 * The signature level is read from the pacman config
 * when parsePacmanConfig() is called or can be set
 * manually using setSigLevel().
 */
inline SignatureLevel Manager::sigLevel() const
{
    return m_sigLevel;
}

/*!
 * \brief Sets the signature level.
 */
inline void Manager::setSigLevel(SignatureLevel sigLevel)
{
    m_sigLevel = sigLevel;
}

/*!
 * \brief Returns the signature level used when opening local files.
 *
 * The signature level is read from the pacman config
 * when parsePacmanConfig() is called or can be set
 * manually using setSigLevel().
 */
inline SignatureLevel Manager::localFileSigLevel() const
{
    return m_localFileSigLevel;
}

/*!
 * \brief Sets the signature level used when opening local files.
 */
inline void Manager::setLocalFileSigLevel(SignatureLevel sigLevel)
{
    m_localFileSigLevel = sigLevel;
}

/*!
 * \brief Returns the Pacman cache directory.
 * \remarks This is read from the Pacman configuration.
 */
inline const QString &Manager::pacmanCacheDir() const
{
    return m_pacmanCacheDir;
}

inline const UserRepository *Manager::userRepository() const
{
    return m_userRepo.get();
}

inline UserRepository *Manager::userRepository()
{
    return m_userRepo.get();
}

/*!
 * \brief Returns the local data base.
 */
inline const AlpmDatabase *Manager::localDatabase() const
{
    return m_localDb.get();
}

/*!
 * \brief Returns the local data base.
 */
inline AlpmDatabase *Manager::localDatabase()
{
    return m_localDb.get();
}

}

#endif // ALPM_MANAGER_H