/*
 * Copyright 2013 (c) Anna Schumaker.
 */
#ifndef OCARINA_QUEUE_H
#define OCARINA_QUEUE_H

#include <core/file.h>
#include <core/tags.h>

#include <vector>
#include <list>

enum queue_flags {
	Q_ENABLED	= (1 << 0),
	Q_RANDOM	= (1 << 1),
	Q_REPEAT	= (1 << 2),
	Q_NO_SORT	= (1 << 3),
	Q_DISABLE_CHANGED_SIZE = (1 << 31),
};

static const unsigned int Q_FLAG_MASK = Q_ENABLED | Q_RANDOM | Q_REPEAT | Q_NO_SORT | Q_DISABLE_CHANGED_SIZE;

struct sort_info {
	sort_t field;
	bool   ascending;
};

class Queue {
protected:
	std :: vector <Track *> _tracks;
	std :: vector <struct sort_info> _sort_order;
	unsigned int _cur;
	unsigned int _flags;
	unsigned int _length;

	unsigned int find_sorted_id(Track *);
	unsigned int _add_at(Track *, unsigned int);
	void _del_at(Track *, unsigned int);

public:
	Queue();
	Queue(unsigned int);
	~Queue();
	void write(File &);
	void read(File &);

	virtual void set_flag(queue_flags);
	virtual void unset_flag(queue_flags);
	bool has_flag(queue_flags);

	virtual unsigned int add(Track *);
	virtual void del(Track *);
	virtual void del(unsigned int);
	void updated(Track *);
	Track *next();

	unsigned int size();
	const std::string size_str();
	const std::string length_str();

	virtual void sort(sort_t, bool);
	Track *operator[](unsigned int);
	void track_selected(unsigned int);
};

#endif /* OCARINA_QUEUE_H */