#ifndef LEGACYAPP_H
#define LEGACYAPP_H

#include <QObject>
#include <QSqlDatabase>

#include "models/downloader.h"
#include <LotroDat/datfile.h>
#include <LotroDat/database.h>

class PatchInstaller : public QObject
{
    Q_OBJECT

public:
    struct Status {
        size_t total_parts = 0;
        size_t finished_parts = 0;
    };

    struct AppliedPatchesInfo {
        bool patched_by_old_legacy = false;
        bool has_no_patch_mark = false;
        QString texts_patch_hashsum = "";
        QString images_patch_hashsum = "";
        QString sounds_patch_hashsum = "";
        QString loadscreens_patch_hashsum = "";
        QString textures_patch_hashsum = "";
        QString fonts_patch_hashsum = "";
        QString videos_patch_hashsum = "";
    };

public:
    static PatchInstaller& instance() {
        static PatchInstaller instance_;
        return instance_;
    }
    bool initialised();
    ~PatchInstaller();

    AppliedPatchesInfo getPatchesInfo(); // TODO: Implement

private:
    Q_DISABLE_COPY(PatchInstaller)

    enum RESOURCE_FILE_TYPE : int {
        E_CLIENT_LOCAL = 0,
        E_CLIENT_GENERAL = 1
    };

    explicit PatchInstaller(QObject *parent = nullptr);

    bool datPathIsRelevant();

    void installPatch(QString patch_name, LOTRO_DAT::Database* database);

    void installOriginalPatch(QString patch_name);

    void installLoadscreens(LOTRO_DAT::Database* database);

    void installVideos(LOTRO_DAT::Database* database);

    AppliedPatchesInfo getAppliedPatchesInfoFromDatFile();

    void insertPatchesInfoInDatFile(const AppliedPatchesInfo& info);

public slots:
    void deinit();
    void init();
    void startGame();
    void startPatchInstallationChain();

private slots:
    void onDownloaderProgressChanged(Downloader* context, Downloader::Status progress);

signals:
    void started();
    void progressChanged(PatchInstaller::Status status);
    void videosDownloadProgressChanged(int finished_videos, int total_videos, Downloader::Status status);
    void finished();
    void successfullyInitialized();
    void deinitialized();

private:
    LOTRO_DAT::DatFile* client_local_file_;
    LOTRO_DAT::DatFile* client_general_file_;

    AppliedPatchesInfo _current_applied_patches_info;
    Status current_status;
    const QString _patch_mark_header = "HI_FROM_ENDEVIR_V2.0";
    const int _applied_patches_file_id = 0x23F4F0F0;
    const int _patch_files_versions = 6;
    int download_video_finished_videos = 0;
    int download_video_total_videos = 0;
};

Q_DECLARE_METATYPE(PatchInstaller::Status)

#endif // LEGACYAPP_H