#include "IconRegistry.hpp"

#include <cstdlib>
#include <filesystem>
#include <ranges>
#include <stdexcept>

IconTheme::IconTheme(std::filesystem::path const &themes_directory_path)
{
	for (auto const &dir :
	    std::filesystem::directory_iterator(themes_directory_path)) {
		if (!dir.is_directory())
			continue;

		auto const index_path = dir.path() / "index.theme";
		if (std::filesystem::is_regular_file(index_path))
			continue;
	}
}

IconRegistry::IconRegistry()
{
	std::vector<std::filesystem::path> theme_directory_paths;

	{
		auto const *env { getenv("HOME") };
		if (env && *env) {
			theme_directory_paths.push_back(
			    std::filesystem::path(env) / ".icons");
		}
	}

	{
		auto const *env { getenv("XDG_DATA_DIRS") };
		if (env && *env) {
			theme_directory_paths.push_back(
			    std::filesystem::path(env) / "icons");
		}
	}

	{
		std::filesystem::path const path { "/usr/share/pixmaps" };
		if (std::filesystem::exists(path))
			theme_directory_paths.push_back(path);
	}

	for (auto const &path : std::move(theme_directory_paths)
	        | std::views::filter([](std::filesystem::path &path) {
		          return std::filesystem::is_directory(path);
	          })) {
		try {
			m_themes.push_back({ path });
		} catch (...) {
		}
	}

	if (m_themes.empty()) {
		throw std::runtime_error("Could not find any icon themes.");
	}
}