/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include "FontResolver.hpp"
#include "Base/Utils.hpp"
#include "ResourceLoader.hpp"
#include "SystemFontResolver.hpp"
#include "fmt/format.h"
#include <array>
#include <string_view>
#include <filesystem>

namespace OpenVulkano
{
	namespace
	{
		static constexpr std::array<std::string_view, 1> FONT_EXTENSIONS = { ".ttf" };
		static constexpr std::array<std::string_view, 1> FONT_POSTFIXES = { "-Regular" };

		static constexpr std::array<std::string_view, 3> FONT_FILE_CHECKS = { "", FONT_EXTENSIONS[0], "-Regular.ttf" }; // TODO automate
	}

	Array<char> FontResolver::GetFontData(const std::string& fontName, bool checkSystemFonts)
	{
		Array<char> data;
		for (const auto& ext : FONT_FILE_CHECKS)
		{
			std::string fName = fmt::format("{}{}", fontName, ext);
			data = ResourceLoader::GetInstance().GetResource(fName);
			if (!data.Empty()) return data;
			if (std::filesystem::exists(fName))
			{
				data = Utils::ReadFile(fName, true);
				if (!data.Empty()) return data;
			}
		}
		if (checkSystemFonts)
		{
			data = Utils::ReadFile(SystemFontResolver::GetSystemFontPath(fontName), true);
		}
		return data;
	}
}