// Copyright (c) 2007, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
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// Aegisub Project http://www.aegisub.org/

/// @file subtitles_provider.cpp
/// @brief Base class for subtitle renderers
/// @ingroup subtitle_rendering
///

#include "config.h"

#include "options.h"
#include "subtitles_provider_csri.h"
#include "subtitles_provider_libass.h"
#include "include/aegisub/subtitles_provider.h"

std::unique_ptr<SubtitlesProvider> SubtitlesProviderFactory::GetProvider() {
	std::vector<std::string> list = GetClasses(OPT_GET("Subtitle/Provider")->GetString());
	if (list.empty()) throw std::string("No subtitle providers are available.");

	std::string error;
	for (auto const& factory : list) {
		try {
			size_t pos = factory.find('/');
			std::string subType = pos < factory.size() - 1 ? factory.substr(pos + 1) : "";
			auto provider = Create(factory, subType);
			if (provider) return provider;
		}
		catch (agi::UserCancelException const&) { throw; }
		catch (std::string const& err) { error += factory + " factory: " + err + "\n"; }
		catch (const char *err) { error += factory + " factory: " + std::string(err) + "\n"; }
		catch (...) { error += factory + " factory: Unknown error\n"; }
	}

	throw error;
}

void SubtitlesProviderFactory::RegisterProviders() {
#ifdef WITH_CSRI
	std::vector<std::string> csri_providers(CSRISubtitlesProvider::GetSubTypes());
	if (!csri_providers.empty())
		Register<CSRISubtitlesProvider>("CSRI", false, csri_providers);
#endif
	Register<LibassSubtitlesProvider>("libass");
	LibassSubtitlesProvider::CacheFonts();
}