//
// Created by patrik on 23.08.17.
//

#ifndef HDF4CPP_HDFOBJECT_H
#define HDF4CPP_HDFOBJECT_H

#include <hdf4cpp/HdfDefines.h>
#include <hdf4cpp/HdfException.h>

#include <vector>
#include <functional>
#include <memory>

namespace hdf4cpp {

/// The HdfObject class is the base class of all the HdfObjects.
class HdfObject {
  protected:
    /// This class is responsible to call the end access functions
    class HdfDestroyer {
      public:
        HdfDestroyer(const std::function<int32 (int32)>& endFunction, int32 id) : endFunction(endFunction), id(id) {}
        ~HdfDestroyer() {
            endFunction(id);
        }
    private:
        std::function<int32 (int32)> endFunction;
        int32 id;
    };
    /// A chain of destroyers.
    /// If an HdfObject creates a new one, then gives forward their chain.
    /// If all the HdfObjects would be destroyed, which holds a reference of the destroyer,
    /// then the destructor of the destroyer will call the end access function.
    class HdfDestroyerChain {
      public:
        HdfDestroyerChain() {}
        HdfDestroyerChain(const HdfDestroyerChain& other) : chain(other.chain) {}

        void pushBack(HdfDestroyer * destroyer) {
            chain.push_back(std::shared_ptr<HdfDestroyer>(destroyer));
        }

      private:
        std::vector<std::shared_ptr<HdfDestroyer> > chain;
    };

  public:
    /// \returns the type of the object
    virtual Type getType() const { return type; }

    /// \returns the class type of the object
    virtual ClassType getClassType() const { return classType; }

  protected:
    HdfObject(const Type& type, const ClassType& classType, const HdfDestroyerChain& chain = HdfDestroyerChain()) : type(type),
                                                                                                                    classType(classType),
                                                                                                                    chain(chain) {}
    HdfObject(const HdfObject *object) : type(object->getType()), classType(object->getClassType()), chain(object->chain) {}

    virtual void setType(const Type& type) { this->type = type; }
    virtual void setClassType(const ClassType& classType) { this->classType = classType; }

    /// Throws an HdfException by its type
    virtual void raiseException(const ExceptionType& exceptionType) const {
        throw HdfException(type, classType, exceptionType);
    }

    /// Thorws an HdfException by its message, the type will be OTHER.
    virtual void raiseException(const std::string& message) const {
        throw HdfException(type, classType, message);
    }

  private:
    /// The type of the object.
    Type type;
    /// The class type of the object.
    ClassType classType;

  protected:
    /// The destroyer chain of the object
    HdfDestroyerChain chain;
};
}

#endif //HDF4CPP_HDFOBJECT_H