//
// Created by trotfunky on 09/06/19.
//

#ifndef PROJECT_MAAT_RULES_H
#define PROJECT_MAAT_RULES_H

#include <vector>
#include <algorithm>
#include <math.h>
#include <memory>

#include "Entity.h"


/// Decorates entities with rules which will modify its behaviour
class Rule : public Entity
{
public:
    // The Rule object takes ownership of the Entity*
    Rule(std::shared_ptr<Entity> entity, State targetState, EntityType targetType,
         const std::vector<std::shared_ptr<Entity>>& entities,
         const std::vector<pro_maat::GridPos>& occupiedSquares, const pro_maat::GridPos& mapSize);

    /// Update according to the targetState and targetType
    void update() override;

    // Simply delegate the following function calls to the original entity

    void move(Orientation orientation) override;
    State getState() const override;
    EntityType getType() const override;
    const sf::RectangleShape& getShape() const override;
    pro_maat::GridPos getTarget() const override;
    const pro_maat::GridPos getPosition() const override;
    const std::vector<pro_maat::GridPos> getOccupiedSquares() const override;

private:
    /// Finds the closest free square adjacent to the closest target entity type.
    /// Currently not thread-safe !
    /// \return Suitable target square or current position if none was found.
    pro_maat::GridPos findTarget();

    std::shared_ptr<Entity> entity;

    const State targetState;
    const EntityType targetType;

    const std::vector<std::shared_ptr<Entity>>& entities;
    const std::vector<pro_maat::GridPos>& occupiedSquares;

    const pro_maat::GridPos& mapSize;
};

#endif //PROJECT_MAAT_RULES_H