// Copyright (c) 2005, Rodrigo Braz Monteiro
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/// @file ass_export_filter.h
/// @see ass_export_filter.cpp
/// @ingroup export
///

#pragma once

#include <boost/intrusive/list.hpp>
#include <memory>
#include <string>

class AssFile;
class AssExportFilterChain;
class wxWindow;

namespace agi { struct Context; }

class AssExportFilter : public boost::intrusive::make_list_base_hook<boost::intrusive::link_mode<boost::intrusive::auto_unlink>>::type {
	/// The filter chain needs to be able to muck around with filter names when
	/// they're registered to avoid duplicates
	friend class AssExportFilterChain;

	/// This filter's name
	std::string name;

	/// Higher priority = run earlier
	int priority;

	/// User-visible description of this filter
	std::string description;

public:
	AssExportFilter(std::string name, std::string description, int priority = 0);
	virtual ~AssExportFilter() = default;

	std::string const& GetName() const { return name; }
	std::string const& GetDescription() const { return description; }

	/// Process subtitles
	/// @param subs Subtitles to process
	/// @param parent_window Window to use as the parent if the filter wishes
	///                      to open a progress dialog
	virtual void ProcessSubs(AssFile *subs, wxWindow *parent_window=nullptr)=0;

	/// Draw setup controls
	/// @param parent Parent window to add controls to
	/// @param c Project context
	virtual wxWindow *GetConfigDialogWindow(wxWindow *parent, agi::Context *c) { return nullptr; }

	/// Load settings to use from the configuration dialog
	/// @param is_default If true use default settings instead
	/// @param c Project context
	virtual void LoadSettings(bool is_default, agi::Context *c) { }
};

typedef boost::intrusive::make_list<AssExportFilter, boost::intrusive::constant_time_size<false>>::type FilterList;

class AssExportFilterChain {
public:
	/// Register an export filter
	static void Register(std::unique_ptr<AssExportFilter> filter);
	/// Unregister and delete all export filters
	static void Clear();
	/// Get a filter by name or nullptr if it doesn't exist
	static AssExportFilter *GetFilter(std::string const& name);

	/// Get the list of registered filters
	static FilterList *GetFilterList();
};