#pragma once

#include <QJsonValue>
#include <QLoggingCategory>
#include <QMap>
#include <QObject>
#include <QStringList>
#include <QTimer>
#include <QVariant>

namespace ZShell::config {

Q_DECLARE_LOGGING_CATEGORY(lcConfig)

class ConfigNode : public QObject {
	Q_OBJECT

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

	virtual void loadFromJson(const QJsonValue& json) = 0;
	void loadFromJsonQuietly(const QJsonValue& json);
	[[nodiscard]] virtual QJsonValue toJson() const = 0;

	virtual void clearLoadedKeys() = 0;
	[[nodiscard]] virtual QStringList unknownKeys() const = 0;
	[[nodiscard]] virtual QList<ConfigNode*> childNodes() const;

	virtual void materializeDefaults() = 0;

	void syncFromGlobal(ConfigNode* global);
	virtual void resyncFromGlobal() = 0;

	[[nodiscard]] bool isOverlay() const;
	[[nodiscard]] QString propertyPath(const QString& name = {}) const;

	[[nodiscard]] static int basePropertyOffset();

	signals:
	void propertiesChanged(const QMap<QString, QVariant>& changed);

	protected:
	virtual void syncValuesFromGlobal() = 0;
	virtual void onGlobalPropertiesChanged(
		const QMap<QString, QVariant>& changed) = 0;

	[[nodiscard]] virtual QString childPath(const ConfigNode* child) const = 0;

	void notifyPropertyChanged(const QString& name, const QVariant& value);

	[[nodiscard]] static QString joinPath(
		const QString& parent, const QString& child);

	ConfigNode* m_global = nullptr;

	private:
	void setNotifySuppressed(bool suppressed);
	void emitBatchedChanges();

	QMap<QString, QVariant> m_pendingChanges;
	QTimer* m_batchTimer = nullptr;
	bool m_suppressNotify = false;
};

} // namespace ZShell::config