/*
 * Olive Community Edition - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef PROJECT_H
#define PROJECT_H

#include <memory>
#include <QObject>
#include <QUuid>

#include "node/output/viewer/viewer.h"
#include "node/project/footage/footage.h"
#include "node/color/colormanager/colormanager.h"
#include "window/mainwindow/mainwindowlayoutinfo.h"

namespace olive
{

/**
 * @brief A project instance containing all the data pertaining to the user's project
 *
 * A project instance uses a parent-child hierarchy of Item objects. Projects will usually contain the following:
 *
 * * Footage
 * * Sequences
 * * Folders
 * * Project Settings
 * * Window Layout
 */
class Project : public QObject {
	Q_OBJECT
public:
	enum CacheSetting {
		kCacheUseDefaultLocation,
		kCacheStoreAlongsideProject,
		kCacheCustomPath
	};

	Project();

	virtual ~Project() override;

	/**
   * @brief Destructively destroys all nodes in the graph
   */
	void Clear();

	/**
   * @brief Retrieve a complete list of the nodes belonging to this graph
   */
	const QVector<Node *> &nodes() const
	{
		return node_children_;
	}

	void Initialize();

	SerializedData Load(QXmlStreamReader *reader);
	void Save(QXmlStreamWriter *writer) const;

	int GetNumberOfContextsNodeIsIn(Node *node,
									bool except_itself = false) const;

	QString name() const;

	const QString &filename() const;
	QString pretty_filename() const;
	void set_filename(const QString &s);

	Folder *root() const
	{
		return root_;
	}
	ColorManager *color_manager() const
	{
		return color_manager_;
	}

	bool is_modified() const
	{
		return is_modified_;
	}
	void set_modified(bool e);

	bool has_autorecovery_been_saved() const;
	void set_autorecovery_saved(bool e);

	bool is_new() const;

	QString get_cache_alongside_project_path() const;
	QString cache_path() const;

	const QUuid &GetUuid() const
	{
		return uuid_;
	}

	void SetUuid(const QUuid &uuid)
	{
		uuid_ = uuid;
	}

	void RegenerateUuid();

	/**
   * @brief Returns the filename the project was saved as, but not necessarily where it is now
   *
   * May help for resolving relative paths.
   */
	const QString &GetSavedURL() const
	{
		return saved_url_;
	}

	void SetSavedURL(const QString &url)
	{
		saved_url_ = url;
	}

	/**
   * @brief Find project parent from object
   *
   * If an object is expected to be a child of a project, this function will traverse its parent
   * tree until it finds it.
   */
	static Project *GetProjectFromObject(const QObject *o);

	static void CopySettings(Project *from, Project *to)
	{
		to->settings_ = from->settings_;
	}

	static const QString kItemMimeType;

	static const QString kCacheLocationSettingKey;
	static const QString kCachePathKey;
	static const QString kColorConfigFilename;
	static const QString kColorReferenceSpace;
	static const QString kDefaultInputColorSpaceKey;
	static const QString kRootKey;

	QString GetSetting(const QString &key) const
	{
		return settings_.value(key);
	}
	void SetSetting(const QString &key, const QString &value);

	CacheSetting GetCacheLocationSetting() const
	{
		return static_cast<CacheSetting>(
			GetSetting(kCacheLocationSettingKey).toInt());
	}
	void SetCacheLocationSetting(CacheSetting s)
	{
		SetSetting(kCacheLocationSettingKey, QString::number(s));
	}

	QString GetCustomCachePath() const
	{
		return GetSetting(kCachePathKey);
	}
	void SetCustomCachePath(const QString &path)
	{
		SetSetting(kCachePathKey, path);
	}

	QString GetColorConfigFilename() const
	{
		return GetSetting(kColorConfigFilename);
	}
	void SetColorConfigFilename(const QString &s)
	{
		SetSetting(kColorConfigFilename, s);
	}

	QString GetDefaultInputColorSpace() const
	{
		return GetSetting(kDefaultInputColorSpaceKey);
	}
	void SetDefaultInputColorSpace(const QString &s)
	{
		SetSetting(kDefaultInputColorSpaceKey, s);
	}

	QString GetColorReferenceSpace() const
	{
		return GetSetting(kColorReferenceSpace);
	}
	void SetColorReferenceSpace(const QString &s)
	{
		SetSetting(kColorReferenceSpace, s);
	}

signals:
	void NameChanged();

	void ModifiedChanged(bool e);

	/**
   * @brief Signal emitted when a Node is added to the graph
   */
	void NodeAdded(Node *node);

	/**
   * @brief Signal emitted when a Node is removed from the graph
   */
	void NodeRemoved(Node *node);

	void InputConnected(Node *output, const NodeInput &input);

	void InputDisconnected(Node *output, const NodeInput &input);

	void ValueChanged(const NodeInput &input);

	void InputValueHintChanged(const NodeInput &input);

	void GroupAddedInputPassthrough(NodeGroup *group, const NodeInput &input);

	void GroupRemovedInputPassthrough(NodeGroup *group, const NodeInput &input);

	void GroupChangedOutputPassthrough(NodeGroup *group, Node *output);

	void SettingChanged(const QString &key, const QString &value);

protected:
	virtual void childEvent(QChildEvent *event) override;

private:
	QUuid uuid_;

	Folder *root_;

	QString filename_;

	QString saved_url_;

	bool is_modified_;

	bool autorecovery_saved_;

	ColorManager *color_manager_;

	QVector<Node *> node_children_;

	QMap<QString, QString> settings_;
};

}

#endif // PROJECT_H