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

#pragma once
#include "display/mesh/quad.h"
#include "display/texture/texture.h"

#define SPRITEBATCH_SPRITES_MAX 1
#define SPRITEBATCH_VERTEX_COUNT (SPRITEBATCH_SPRITES_MAX * QUAD_VERTEX_COUNT) 


typedef struct {
  mesh_t mesh;
  int32_t spriteCount;
  texture_t *currentTexture;
  meshvertex_t vertices[SPRITEBATCH_VERTEX_COUNT];
} spritebatch_t;

extern spritebatch_t SPRITEBATCH;

/**
 * Initializes a sprite batch.
 * 
 * @param spriteBatch The sprite batch to initialize.
 */
void spriteBatchInit();

/**
 * Pushes a sprite to the batch. This basically "queues" it to render (well
 * technically it is buffering the vertices to the mesh at the moment, but
 * that is likely to change when we switch to VAOs or VBOs or even Shader UBOs).
 * 
 * Currently changing texture pointer will cause the buffer to flush but this is
 * also likely to change in the future.
 * 
 * @param texture The texture to use for the sprite.
 * @param minX The minimum x coordinate of the sprite.
 * @param minY The minimum y coordinate of the sprite.
 * @param maxX The maximum x coordinate of the sprite.
 * @param maxY The maximum y coordinate of the sprite.
 * @param color The color to tint the sprite with.
 * @param u0 The texture coordinate for the top-left corner of the sprite.
 * @param v0 The texture coordinate for the top-left corner of the sprite.
 * @param u1 The texture coordinate for the bottom-right corner of the sprite.
 * @param v1 The texture coordinate for the bottom-right corner of the sprite.
 */
void spriteBatchPush(
  texture_t *texture,
  const float_t minX,
  const float_t minY,
  const float_t maxX,
  const float_t maxY,
  const color_t color,
  const float_t u0,
  const float_t v0,
  const float_t u1,
  const float_t v1
);

/**
 * Clears the sprite batch. This will mean calling flush renders nothing.
 */
void spriteBatchClear();

/**
 * Flushes the sprite batch, rendering all queued sprites.
 */
void spriteBatchFlush();

/**
 * Disposes of the sprite batch, freeing any allocated resources.
 */
void spriteBatchDispose();