Behavior.hh

// Copyright QED Software 2023.
 
#ifndef GRAIL_AI_BEHAVIOR_H
#define GRAIL_AI_BEHAVIOR_H
 
#include <memory>
#include <string>
 
namespace grail
{
    class AIEntity;
 
    enum class BehaviorStatus
    {
        SUSPENDED = 0,
        ACTIVE,
        FINISHED,
        DELEGALIZED,
    };
 
    class Behavior
    {
        friend class AIEntity;
        friend class BehaviorSequence;
 
    public:
        Behavior(std::unique_ptr<Behavior> recoveryBehavior = nullptr);
        Behavior(Behavior&&) = default;
 
        virtual ~Behavior();
 
        Behavior& operator =(const Behavior&) = delete;
        Behavior& operator =(Behavior&&) = delete;
 
        virtual void Start(AIEntity& owner);
 
        virtual void Update(AIEntity& owner, float deltaTime);
 
        virtual void Finish(AIEntity& owner, const BehaviorStatus status);
 
        virtual bool IsFinished(const AIEntity& owner) const;
 
        virtual bool IsLegal(const AIEntity& owner) const;
 
        virtual bool IsInterruptible() const;
 
        BehaviorStatus GetStatus() const;
 
        virtual std::unique_ptr<Behavior> GetRecoveryBehavior();
 
        virtual std::string GetName() const;
 
    protected:
        std::unique_ptr<Behavior> recoveryBehavior{nullptr};
 
    private:
        void UpdateStatus(const AIEntity& owner);
        void SetStatus(BehaviorStatus newStatus);
 
        BehaviorStatus status = BehaviorStatus::SUSPENDED;
    };
}
#endif  //GRAIL_AI_BEHAVIOR_H