#pragma once
#ifdef _WIN32
#include <windows.h>
#include <process.h>
#elif __linux__
#include <pthread.h>
#else
#error "이 플랫폼은 지원되지 않습니다."
#endif
#include <functional>
#include <future>

namespace Chattr {

template<typename F, typename... Args>
concept ReturnsVoidPtr = std::is_same_v<
    std::invoke_result_t<F, Args...>,
    void*
>;

class Thread {
public:
#ifdef _WIN32
    static unsigned __stdcall thread_func(LPVOID param) {
        // auto task = static_cast<std::function<void *()>*>(param);
        std::unique_ptr<std::function<void*()>> task(static_cast<std::function<void* ()>*>(param));
        (*task)();
        return 0;
    }
#elif __linux__
    static void* thread_func(void *param) {
        auto task(static_cast<std::packaged_task<void*()>*>(param));
        (*task)();
        delete task;
        return 0;
    }
#endif
    Thread(Thread&&) noexcept;
    Thread& operator=(Thread&&) noexcept;

    Thread(const Thread&) = delete;
    Thread& operator=(Thread&) = delete;

    template<typename _Callable, typename... _Args>
        requires ReturnsVoidPtr<_Callable, _Args...> && (!std::is_same_v<std::decay_t<_Callable>, Thread>)
    Thread(_Callable&& __f, _Args&&... __args) {
        auto boundFunc = [this, __f = std::move(__f), ... __args = std::move(__args)]() mutable -> void* {
            void* ret = __f(std::move(__args)...);
            returnValue = ret;
            return ret;
        };
        std::function<void* ()> funcPtr = std::move(boundFunc);
#ifdef _WIN32
        handle_ = (HANDLE)_beginthreadex(nullptr, 0, thread_func, new std::function<void *()>(std::move(funcPtr)), 0, nullptr);
#elif __linux__
        pthread_create(&handle_, NULL, thread_func, funcPtr);
#endif
    }
    ~Thread();

    void* join();
    void detach();

private:
#ifdef _WIN32
    HANDLE handle_;
#elif __linux__
    pthread_t handle_;
#endif
    void* returnValue = nullptr;
    bool detached = false;
};

} // namespace Chattr