#ifndef ENGINE_H__
#define ENGINE_H__
#include "define.h"
#include "openglcontext.h"
#include "texture.h"
#include "transformation.h"
#include "shader.h"
#include "player.h"
#include "chunk.h"
#include "skybox.h"
#include "audio.h"
#include "textureatlas.h"
#include "blockinfo.h"
#include "array2d.h"
#include "world.h"
#include "perlin.h"

class Engine : public OpenglContext {
public:
    Engine();
    virtual ~Engine();
    virtual void Init();
    virtual void DeInit();
    virtual void LoadResource();
    virtual void UnloadResource();
    virtual void Render(float elapsedTime);
    virtual void KeyPressEvent(unsigned char key);
    virtual void KeyReleaseEvent(unsigned char key);
    virtual void MouseMoveEvent(int x, int y);
    virtual void MousePressEvent(const MOUSE_BUTTON &button, int x, int y);
    virtual void MouseReleaseEvent(const MOUSE_BUTTON &button, int x, int y);

private:
    bool LoadTexture(Texture& texture, const std::string& filename, bool stopOnError = true);
    void DrawHud(float elapsedTime);
    void PrintText(unsigned int x, unsigned int y, const std::string& t);
    int GetFps(float elapsedTime) const;
    bool GenerateChunk(int chx, int chy);
    void UpdateWorld(int& generates, int& updates, int chx, int chy);

    void ChangeBlockAtCursor(BlockType blocktype);

    bool m_wireframe = false;
    bool m_renderer = false;

    int m_renderCount = 0;
    int m_badHitCount = 0;
    std::vector<Vector3i> m_renderManifest;

    BlockInfo* m_blockinfo[BTYPE_LAST];
    TextureAtlas m_textureAtlas = TextureAtlas(BTYPE_LAST);
    World m_world = World();
    Perlin m_perlin = Perlin(3,5.f,64.f,12345);

    Texture m_textureFloor;
    Texture m_textureSkybox;
    Texture m_textureFont;
    Texture m_textureCrosshair;
    Texture m_textureCube1;
    
    Skybox m_skybox;
    Shader m_shader01;
    Audio m_audio = Audio(AUDIO_PATH "music01.wav");

    Player m_player = Player(Vector3f(CHUNK_SIZE_X * WORLD_SIZE_X / 2, CHUNK_SIZE_Y + 1.8f, CHUNK_SIZE_Z * WORLD_SIZE_X / 2));

    bool m_keyW = false;
    bool m_keyA = false;
    bool m_keyS = false;
    bool m_keyD = false;
    bool m_keylshift = false;
    bool m_keySpace = false;
    bool m_mouseL = false;
    bool m_mouseR = false;
    bool m_mouseC = false;
    bool m_mouseWU = false;
    bool m_mouseWD = false;

    bool m_block = false;
};

template <class T>
static bool EqualWithEpsilon(const T& v1, const T& v2, T epsilon = T(0.0001)) { return (fabs(v2 - v1) < epsilon); }

template <class T>
static bool InRangeWithEpsilon(const T& v, const T& vinf, const T& vsup, T epsilon = T(0.0001)) { return (v >= vinf - epsilon && v <= vsup + epsilon); }

#endif // ENGINE_H__