#ifndef CAMERA_H
#define CAMERA_H

#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>

class Camera
{
  public:
    glm::vec3 position;
    glm::vec3 target;
    glm::vec3 direction;
    glm::vec3 up;
    float speed;

    glm::vec3 worldUp;

    Camera(float speed)
    {
        this->speed = speed;

        this->position = glm::vec3(0.0f, 0.0f, 3.0f);
        this->target = glm::vec3(0.0f, 0.0f, -1.0f);

        this->direction = glm::normalize(this->position);
        this->worldUp = glm::vec3(0.0f, 1.0f, 0.0f);

        glm::vec3 right = glm::normalize(glm::cross(up, this->direction));
        this->up = glm::cross(this->direction, right);
    }

    Camera(glm::vec3 pos, glm::vec3 target, float speed)
    {
        this->speed = speed;

        this->position = pos;
        this->target = target;

        this->direction = glm::normalize(this->position - this->target);
        this->worldUp = glm::vec3(0.0f, 1.0f, 0.0f);

        glm::vec3 right = glm::normalize(glm::cross(up, this->direction));
        this->up = glm::cross(this->direction, right);
    }

    glm::mat4 getView()
    {
        return glm::lookAt(this->position,
                           this->target + this->position,
                           this->worldUp);
    }

};

#endif