#include "camera.h"
#include <iostream>
#include <glm/glm.hpp>
#include <glm/gtx/transform.hpp>
#include <SDL2\SDL.h>

Camera::Camera(const glm::vec3& position, float fov, float aspect, float near, float far)
{
    m_position = position;
    m_up = glm::vec3(0, 1, 0);
    m_direction = glm::vec3(0, 0, 1);
    m_projMatrix = glm::perspective(fov, aspect, near, far);
    m_moveSpeed = 0.01f;
    //SDL_ShowCursor(SDL_DISABLE);
}

void Camera::update(float delta)
{

}

void Camera::onMouseMove(const glm::vec2& mouse)
{
    glm::vec2 delta = mouse - m_oldMouse;

    m_rotation.x = delta.x * 0.001f;
    m_rotation.y = delta.y * 0.001f;

    m_direction = glm::mat3(glm::rotate(m_rotation.x, m_up)) * m_direction;
    m_direction = glm::mat3(glm::rotate(m_rotation.y, glm::cross(m_direction, m_up))) * m_direction;

    m_oldMouse = mouse;
}

void Camera::onKeyboard(const SDL_KeyboardEvent& event)
{
    if (event.keysym.scancode == Keys::FORWARD) {
        m_position += m_moveSpeed * m_direction;
    }
    if (event.keysym.scancode == Keys::BACKWARD) {
        m_position += -m_moveSpeed * m_direction;
    }
    if (event.keysym.scancode == Keys::LEFT) {
        m_position += -m_moveSpeed * glm::cross(m_direction, m_up);
    }
    if (event.keysym.scancode == Keys::RIGHT) {
        m_position += m_moveSpeed * glm::cross(m_direction, m_up);
    }
    if (event.keysym.scancode == Keys::UP) {
        m_position += m_moveSpeed * m_up;
    }
    if (event.keysym.scancode == Keys::DOWN) {
        m_position += -m_moveSpeed * m_up;
    }
}

Camera::~Camera()
{
    SDL_ShowCursor(SDL_ENABLE);
}