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#pragma once
#include <cpr/cpr.h>
#include <functional>
#include <string>
#include <filesystem>
#include <vector>
#include <unordered_map>
#include "util.hpp"
// todo throttle requests and keep track of active requests to stop redundant requests
class Cache {
public:
Cache();
~Cache();
using callback_type = std::function<void(std::string)>;
void GetFileFromURL(std::string url, callback_type cb);
std::string GetPathIfCached(std::string url);
private:
std::string GetCachedName(std::string str);
void CleanupFutures();
void RespondFromPath(std::filesystem::path path, callback_type cb);
void OnResponse(const cpr::Response &r);
std::unique_ptr<Semaphore> m_semaphore;
std::unordered_map<std::string, std::vector<callback_type>> m_callbacks;
std::vector<std::future<void>> m_futures;
std::filesystem::path m_tmp_path;
bool m_canceled = false;
};
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