/*
SPDX-FileCopyrightText: 2012 Till Theato <root@ttill.de>
SPDX-FileCopyrightText: 2014 Jean-Baptiste Mardelle <jb@kdenlive.org>
SPDX-FileCopyrightText: 2017 Nicolas Carion
This file is part of Kdenlive. See www.kdenlive.org.

SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
*/

#pragma once

#include "abstractmodel/abstracttreemodel.hpp"
#include "bin/abstractprojectitem.h"
#include "definitions.h"
#include "undohelper.hpp"
#include <QDomElement>
#include <QFileInfo>
#include <QIcon>
#include <QReadWriteLock>
#include <QSize>
#include <QTimer>
#include <QUuid>

class BinPlaylist;
class FileWatcher;
class MarkerListModel;
class ProjectClip;
class ProjectFolder;
class EffectStackModel;
class QProgressDialog;

namespace Mlt {
class Producer;
class Properties;
class Tractor;
class Service;
} // namespace Mlt

/**
 * @class ProjectItemModel
 * @brief Acts as an adaptor to be able to use BinModel with item views.
 */
class ProjectItemModel : public AbstractTreeModel
{
    Q_OBJECT

protected:
    explicit ProjectItemModel(QObject *parent);

public:
    static std::shared_ptr<ProjectItemModel> construct(QObject *parent = nullptr);
    ~ProjectItemModel() override;

    friend class ProjectClip;
    friend class ThumbnailCache;
    /** @brief Timer checking if we have missing clips in the project */
    QTimer missingClipTimer;

    /** @brief Builds the MLT playlist, can only be done after MLT is correctly initialized */
    void buildPlaylist(const QUuid uuid);

    /** @brief Returns a clip from the hierarchy, given its id */
    std::shared_ptr<ProjectClip> getClipByBinID(const QString &binId);
    /** @brief Returns audio levels for a clip from its id */
    const QVector <uint8_t>getAudioLevelsByBinID(const QString &binId, int stream);
    double getAudioMaxLevel(const QString &binId, int stream);

    /** @brief Returns a list of clips using the given url */
    QStringList getClipByUrl(const QFileInfo &url) const;

    /** @brief Helper to check whether a clip with a given id exists */
    bool hasClip(const QString &binId);

    /** @brief Gets a folder by its id. If none is found, nullptr is returned */
    std::shared_ptr<ProjectFolder> getFolderByBinId(const QString &binId);
    /** @brief Gets a list of all folders in this project */
    QList <std::shared_ptr<ProjectFolder> > getFolders();
    /** @brief Gets a id folder by its name. If none is found, empty string returned */
    const QString getFolderIdByName(const QString &folderName);

    /** @brief Gets any item by its id. */
    std::shared_ptr<AbstractProjectItem> getItemByBinId(const QString &binId);

    /** @brief This function change the global enabled state of the bin effects */
    void setBinEffectsEnabled(bool enabled);

    /** @brief Returns some info about the folder containing the given index */
    QStringList getEnclosingFolderInfo(const QModelIndex &index) const;

    /** @brief Deletes all element and start a fresh model */
    void clean();

    /** @brief Returns the id of all the clips (excluding folders) */
    std::vector<QString> getAllClipIds() const;
    
    /** @brief Updates the list of all created bin thumbnails */
    void updateCacheThumbnail(std::unordered_map<QString, std::vector<int>> &thumbData);

    /** @brief Convenience method to access root folder */
    std::shared_ptr<ProjectFolder> getRootFolder() const;

    void loadSubClips(const QString &id, const QString &dataMap, Fun &undo, Fun &redo);

    /** @brief Convenience method to retrieve a pointer to an element given its index */
    std::shared_ptr<AbstractProjectItem> getBinItemByIndex(const QModelIndex &index) const;

    /** @brief Load the folders given the property containing them */
    bool loadFolders(Mlt::Properties &folders, std::unordered_map<QString, QString> &binIdCorresp);

    /** @brief Parse a bin playlist from the document tractor and reconstruct the tree
     *  @return A list of invalid sequence clips found in Project Bin (can be caused by 23.04.0 bug)
     */
    QList<QUuid> loadBinPlaylist(Mlt::Service *documentTractor, std::unordered_map<QString, QString> &binIdCorresp, QStringList &expandedFolders,
                                 const QUuid &activeUuid, int &zoomLevel, QProgressDialog *progressDialog = nullptr);
    void loadTractorPlaylist(Mlt::Tractor documentTractor, std::unordered_map<QString, QString> &binIdCorresp);

    /** @brief Save document properties in MLT's bin playlist */
    void saveDocumentProperties(const QMap<QString, QString> &props, const QMap<QString, QString> &metadata);

    /** @brief Save a property to main bin */
    void saveProperty(const QString &name, const QString &value);

    /** @brief Returns item data depending on role requested */
    QVariant data(const QModelIndex &index, int role) const override;
    /** @brief Called when user edits an item */
    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
    /** @brief Allow selection and drag & drop */
    Qt::ItemFlags flags(const QModelIndex &index) const override;
    /** @brief Returns column names in case we want to use columns in QTreeView */
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
    /** @brief Mandatory reimplementation from QAbstractItemModel */
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
    /** @brief Returns the MIME type used for Drag actions */
    QStringList mimeTypes() const override;
    /** @brief Create data that will be used for Drag events */
    QMimeData *mimeData(const QModelIndexList &indices) const override;
    /** @brief Set size for thumbnails */
    void setIconSize(QSize s);
    bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override;
    Qt::DropActions supportedDropActions() const override;

    /** @brief Request deletion of a bin clip from the project bin
       @param clip : pointer to the clip to delete
       @param undo,redo: lambdas that are updated to accumulate operation.
     */
    bool requestBinClipDeletion(const std::shared_ptr<AbstractProjectItem> &clip, Fun &undo, Fun &redo);

    /** @brief Request creation of a bin folder
       @param id Id of the requested bin. If this is empty or invalid (already used, for example), it will be used as a return parameter to give the automatic
       bin id used.
       @param name Name of the folder
       @param parentId Bin id of the parent folder
       @param undo,redo: lambdas that are updated to accumulate operation.
    */
    bool requestAddFolder(QString &id, const QString &name, const QString &parentId, Fun &undo, Fun &redo);
    /** @brief Request creation of a bin clip
       @param id Id of the requested bin. If this is empty, it will be used as a return parameter to give the automatic bin id used.
       @param description Xml description of the clip
       @param parentId Bin id of the parent folder
       @param undo,redo: lambdas that are updated to accumulate operation.
       @param readyCallBack: lambda that will be executed when the clip becomes ready. It is given the binId as parameter
    */
    bool requestAddBinClip(QString &id, const QDomElement &description, const QString &parentId, Fun &undo, Fun &redo,
                           const std::function<void(const QString &)> &readyCallBack = [](const QString &) {});
    bool requestAddBinClip(QString &id, const QDomElement &description, const QString &parentId, const QString &undoText = QString(), const std::function<void(const QString &)> &readyCallBack = [](const QString &) {});

    /** @brief This is the addition function when we already have a producer for the clip*/
    bool requestAddBinClip(
        QString &id, std::shared_ptr<Mlt::Producer> &producer, const QString &parentId, Fun &undo, Fun &redo,
        const std::function<void(const QString &)> &readyCallBack = [](const QString &) {});

    /** @brief Create a subClip
       @param id Id of the requested bin. If this is empty, it will be used as a return parameter to give the automatic bin id used.
       @param parentId Bin id of the parent clip
       @param in,out : zone that corresponds to the subclip
       @param undo,redo: lambdas that are updated to accumulate operation.
    */
    bool requestAddBinSubClip(QString &id, int in, int out, const QMap<QString, QString> &zoneProperties, const QString &parentId, Fun &undo, Fun &redo);
    bool requestAddBinSubClip(QString &id, int in, int out, const QMap<QString, QString> &zoneProperties, const QString &parentId);

    /** @brief Request that a folder's name is changed
       @param clip : pointer to the folder to rename
       @param name: new name of the folder
       @param undo,redo: lambdas that are updated to accumulate operation.
    */
    bool requestRenameFolder(const std::shared_ptr<AbstractProjectItem> &folder, const QString &name, Fun &undo, Fun &redo);
    /* Same functions but pushes the undo object directly */
    bool requestRenameFolder(std::shared_ptr<AbstractProjectItem> folder, const QString &name);

    /** @brief Request that the unused clips are deleted */
    bool requestCleanupUnused();

    /** @brief Request that all clips using one of the given urls are removed from the project and deleted from the hard disk*/
    bool requestTrashClips(QStringList &ids, QStringList &urls);

    /** @brief Retrieves the next id available for attribution to a folder */
    int getFreeFolderId();

    /** @brief Retrieves the next id available for attribution to a clip */
    int getFreeClipId();

    /** @brief Check whether a given id is currently used or not*/
    bool isIdFree(const QString &id) const;

    /** @brief Retrieve a list of proxy/original urls */
    QMap<QString, QString> getProxies(const QString &root);

    /** @brief Request that the producer of a given clip is reloaded */
    void reloadClip(const QString &binId);

    /** @brief Set the status of the clip to "waiting". This happens when the corresponding file has changed*/
    void setClipWaiting(const QString &binId);
    void setClipInvalid(const QString &binId);

    /** @brief Returns true if current project has a clip with id \@clipId and a hash of \@clipHash */
    bool validateClip(const QString &binId, const QString &clipHash);
    /** @brief Returns clip id if folder "folderId" has a clip with hash of "clipHash" or empty if not found */
    QString validateClipInFolder(const QString &folderId, const QString &clipHash);

    /** @brief Number of clips in the bin playlist */
    int clipsCount() const;
    /** @brief Returns true if we have proxied clips in the project */
    bool hasProxies() const;
    /** @brief Get a secondary timeline tractor by its uuid */
    std::shared_ptr<Mlt::Tractor> getExtraTimeline(const QString &uuid);
    void setExtraTimelineSaved(const QString &uuid);
    /** @brief Check if  a file is already in Bin */
    bool urlExists(const QString &path) const;
    /** @brief Returns the unique uuid for this project item model */
    QUuid uuid() const { return m_uuid; };
    /** @brief Retrieve the Bin clip id from a sequence uuid */
    const QString getSequenceId(const QUuid &uuid);
    /** @brief Check if we already have a sequence with this uuid */
    bool hasSequenceId(const QUuid &uuid) const;
    /** @brief Return a project sequence clip from its uuid */
    std::shared_ptr<ProjectClip> getSequenceClip(const QUuid &uuid);
    /** @brief Returns uuid / bin id of all sequence clips in the project */
    QMap<QUuid, QString> getAllSequenceClips() const;
    /** @brief Return the main project tractor (container of all playlists) */
    std::shared_ptr<Mlt::Tractor> projectTractor();
    const QString sceneList(const QString &root, const QString &fullPath, const QString &filterData, Mlt::Tractor *activeTractor, int duration);
    /** @brief Ensure that sequence @destUuid is not embedded in any dependency of sequence @srcUuid */
    bool canBeEmbeded(const QUuid destUuid, const QUuid srcUuid);
    /** @brief Store a newly created sequence tractor for reuse */
    void storeSequence(const QString uuid, std::shared_ptr<Mlt::Tractor> tractor, bool internalSave = true);
    /** @brief Returns the count of sequences in this project */
    int sequenceCount() const;
    /** @brief The id of the folder where new sequences will be created, -1 if none */
    int defaultSequencesFolder() const;
    void setSequencesFolder(int id);
    /** @brief Remove clip references for a timeline. */
    void removeReferencedClips(const QUuid &uuid, bool onDeletion);
    /** @brief Check that all sequences are correctly stored in the model */
    void checkSequenceIntegrity(const QString activeSequenceId);
    std::shared_ptr<EffectStackModel> getClipEffectStack(int itemId);

protected:
    bool closing;
    /** @brief Register the existence of a new element
     */
    void registerItem(const std::shared_ptr<TreeItem> &item) override;
    /** @brief Deregister the existence of a new element*/
    void deregisterItem(int id, TreeItem *item) override;

    /** @brief Helper function to generate a lambda that rename a folder */
    Fun requestRenameFolder_lambda(const std::shared_ptr<AbstractProjectItem> &folder, const QString &newName);

    /** @brief Helper function to add a given item to the tree */
    bool addItem(const std::shared_ptr<AbstractProjectItem> &item, const QString &parentId, Fun &undo, Fun &redo);

    /** @brief Function to be called when the url of a clip changes */
    void updateWatcher(const std::shared_ptr<ProjectClip> &item);

public Q_SLOTS:
    /** @brief An item in the list was modified, notify */
    void onItemUpdated(const std::shared_ptr<AbstractProjectItem> &item, const QVector<int> &roles);
    void onItemUpdated(const QString &binId, int role);

    void setDragType(PlaylistState::ClipState type);
    /** @brief Create the subclips defined in the parent clip.
    @param id is the id of the parent clip
    @param data is a definition of the subclips (keys are subclips' names, value are "in:out")*/
    void loadSubClips(const QString &id, const QString &clipData, bool logUndo);

private Q_SLOTS:
    /** @brief Check how many invalid clips we have. */
    void slotUpdateInvalidCount();

private:
    /** @brief Return reference to column specific data */
    int mapToColumn(int column) const;
    /** @brief Return column number(s) responsible for a specific data type*/
    QList<int> mapDataToColumn(AbstractProjectItem::DataType type) const;

    mutable QReadWriteLock m_lock; // This is a lock that ensures safety in case of concurrent access

    std::unique_ptr<BinPlaylist> m_binPlaylist;

    std::unique_ptr<FileWatcher> m_fileWatcher;
    std::unordered_map<QString, std::shared_ptr<Mlt::Tractor>> m_extraPlaylists;
    std::shared_ptr<Mlt::Tractor> m_projectTractor;
    std::map<int, std::shared_ptr<ProjectClip>> m_allClipItems;
    QList<int> m_allIds;

    int m_nextId;
    QIcon m_blankThumb;
    PlaylistState::ClipState m_dragType;
    QUuid m_uuid;
    /** @brief The id of the folder where new sequences will be created, -1 if none */
    int m_sequenceFolderId;
    /** @brief Remove an item from the project */
    Fun removeProjectItem_lambda(int binId, int id);

Q_SIGNALS:
    /** @brief thumbs of the given clip were modified, request update of the monitor if need be */
    void refreshAudioThumbs(const QString &id);
    void refreshClip(const QString &id);
    void emitMessage(const QString &, int, MessageType);
    void refreshPanel(const QString &id);
    void requestAudioThumbs(const QString &id, long duration);
    // TODO
    void markersNeedUpdate(const QString &id, const QList<int> &);
    void itemDropped(const QStringList, const QModelIndex);
    void urlsDropped(const QList<QUrl>, const QModelIndex);
    void effectDropped(const QStringList &, const QModelIndex &);
    void addTag(const QString &, const QModelIndex &);
    void addClipCut(const QString &, int, int);
    void resetPlayOrLoopZone(const QString &id);
};
