#include <filesystem>
#include <fstream>
#include "fscache.h"
#include "../logger.h"

FsCache::FsCache(std::string path)
{
	if(!std::filesystem::exists(path))
	{
		throw std::runtime_error{"Cache directory does not exist"};
	}
	this->path = path;
}

std::string FsCache::getFilePath(std::string_view path) const
{
	std::filesystem::path ps{path};
	std::string name = ps.filename();
	return std::filesystem::path{this->path} / name;
}
std::optional<std::string> FsCache::get(std::string_view key) const
{
	std::string path = getFilePath(key);
	if(std::filesystem::exists(path))
	{
		return utils::readCompleteFile(path);
	}
	return {};
}

void FsCache::put(std::string_view key, std::string val)
{
	std::string path = std::filesystem::path{this->path} / key;
	std::fstream f1;
	f1.open(path, std::ios::out);
	f1 << val;
}

void FsCache::remove(std::string_view key)
{
	std::filesystem::remove_all(std::filesystem::path{this->path} / key);
}

void FsCache::removePrefix(std::string_view prefix)
{
	// TODO: lock dir
	for(auto &entry : std::filesystem::directory_iterator(std::filesystem::path{this->path}))
	{
		if(std::string_view(entry.path().filename().c_str()).starts_with(prefix))
		{
			std::filesystem::remove_all(entry);
		}
	}
}

void FsCache::clear()
{
	for(auto &entry : std::filesystem::directory_iterator(std::filesystem::path{this->path}))
	{
		std::filesystem::remove_all(entry);
	}
}