/**
 * Copyright (c) 2025 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#pragma once
#include "dusk.h"
#include "display/framebuffer/framebuffer.h"
#include "display/camera.h"
#include "display/mesh/quad.h"

typedef enum {
  SCREEN_MODE_BACKBUFFER,

  #if DISPLAY_SIZE_DYNAMIC == 1
    SCREEN_MODE_ASPECT_RATIO,// Maintains aspect at all cost
    SCREEN_MODE_FIXED_HEIGHT, // Fixed height, width expands/contracts as needed
  #endif
} screenmode_t;

typedef enum {
  SCREEN_SCALE_MODE_FILL,
  SCREEN_SCALE_MODE_INTEGER,
  SCREEN_SCALE_MODE_INEGER_OVERFLOW
} screenscalemode_t;

typedef struct {
  screenmode_t mode;
  screenscalemode_t scaleMode;

  // Calculated dimensions of the viewport, to be used by the camera
  int32_t width;
  int32_t height;

  #if DISPLAY_SIZE_DYNAMIC == 1
    framebuffer_t framebuffer;
    bool_t framebufferReady;
    camera_t framebufferCamera;
    mesh_t frameBufferMesh;
    meshvertex_t frameBufferMeshVertices[QUAD_VERTEX_COUNT];
  #endif
  
  union {
    struct {
      float_t ratio;
    } aspectRatio;
    
    struct {
      int32_t height;
    } fixedHeight;
  };
} screen_t;

extern screen_t SCREEN;

/**
 * Initializes the screen system.
 */
void screenInit();

/**
 * Binds the screen, this is done before rendering game content.
 */
void screenBind();

/**
 * Unbinds the screen, does nothing for now.
 */
void screenUnbind();

/**
 * Renders the screen to the current framebuffer.
 */
void screenRender();

/**
 * Disposes the screen system.
 */
void screenDispose();