#ifndef SHAREDPOINTER_H
#define SHAREDPOINTER_H

#include "Pointer.h"

namespace Kylin {
template <typename T>
class SharedPointer : public Pointer<T> {
public:
    SharedPointer(T *p) {
        if (p == nullptr) return;
        this->m_pointer = p;
        m_counter = new size_t(1);
    }
    SharedPointer(const SharedPointer &obj) {
        if (obj.m_counter == nullptr) return;
        m_counter = obj.m_counter;
        this->m_pointer = obj.m_pointer;
        (*m_counter)++;
    }

    SharedPointer &operator=(const SharedPointer &obj) {
        if (this != &obj) {
            clear();
            m_counter = obj.m_counter;
            this->m_pointer = obj.m_pointer;
            (*m_counter)++;
        }
    }

    void clear() {
        if (m_counter == nullptr) return;
        (*m_counter)--;
        if (*m_counter == 0) {
            delete m_counter;
            delete this->m_pointer;
        }
        this->m_pointer = nullptr;
        m_counter = nullptr;
    }

    bool operator==(const SharedPointer &obj) const { return (this->m_pointer == obj.m_pointer); }

    ~SharedPointer() { clear(); }

private:
    size_t *m_counter = nullptr;
};

} // namespace Kylin
#endif // SHAREDPOINTER_H