#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(static_cast<std::string>(entry.path().filename()).find(prefix) == 0)
		{
				 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);
	}
}