/**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "dusktest.h"
#include "display/spritebatch/spritebatchsprite.h"

static void test_spriteBatchSpriteTilesetPosition_create(void **state) {
  tileset_t tileset = {
    .tileWidth = 8,
    .tileHeight = 8,
    .tileCount = 4,
    .columns = 2,
    .rows = 2,
    .uv = { 0.5f, 0.5f }
  };

  spritebatchsprite_t sprite = spriteBatchSpriteTilesetPosition(
    &tileset, 1, 1, 10.0f, 20.0f, 8.0f, 8.0f
  );

  assert_float_equal(sprite.min[0], 10.0f, 0.0001f);
  assert_float_equal(sprite.min[1], 20.0f, 0.0001f);
  assert_float_equal(sprite.min[2], 0.0f, 0.0001f);
  assert_float_equal(sprite.max[0], 18.0f, 0.0001f);
  assert_float_equal(sprite.max[1], 28.0f, 0.0001f);
  assert_float_equal(sprite.uvMin[0], 0.5f, 0.0001f);
  assert_float_equal(sprite.uvMin[1], 0.5f, 0.0001f);
  assert_float_equal(sprite.uvMax[0], 1.0f, 0.0001f);
  assert_float_equal(sprite.uvMax[1], 1.0f, 0.0001f);
}

static void test_spriteBatchSpriteTilesetPosition_zeroSize(void **state) {
  tileset_t tileset = {
    .tileWidth = 8,
    .tileHeight = 8,
    .tileCount = 1,
    .columns = 1,
    .rows = 1,
    .uv = { 1.0f, 1.0f }
  };

  spritebatchsprite_t sprite = spriteBatchSpriteTilesetPosition(
    &tileset, 0, 0, 10.0f, 20.0f, 0.0f, 8.0f
  );

  assert_float_equal(sprite.min[0], 0.0f, 0.0001f);
  assert_float_equal(sprite.min[1], 0.0f, 0.0001f);
  assert_float_equal(sprite.max[0], 0.0f, 0.0001f);
  assert_float_equal(sprite.max[1], 0.0f, 0.0001f);
}

static void test_spriteBatchSpriteTranslate(void **state) {
  spritebatchsprite_t sprite = {
    .min = { 1.0f, 2.0f, 0.0f },
    .max = { 5.0f, 6.0f, 0.0f },
    .uvMin = { 0.25f, 0.5f },
    .uvMax = { 0.75f, 1.0f }
  };

  spritebatchsprite_t translated = spriteBatchSpriteTranslate(
    &sprite, 10.0f, -3.0f
  );

  assert_float_equal(translated.min[0], 11.0f, 0.0001f);
  assert_float_equal(translated.min[1], -1.0f, 0.0001f);
  assert_float_equal(translated.max[0], 15.0f, 0.0001f);
  assert_float_equal(translated.max[1], 3.0f, 0.0001f);

  // UVs must be untouched by translation.
  assert_float_equal(translated.uvMin[0], 0.25f, 0.0001f);
  assert_float_equal(translated.uvMin[1], 0.5f, 0.0001f);
  assert_float_equal(translated.uvMax[0], 0.75f, 0.0001f);
  assert_float_equal(translated.uvMax[1], 1.0f, 0.0001f);

  // Original sprite must be untouched.
  assert_float_equal(sprite.min[0], 1.0f, 0.0001f);
  assert_float_equal(sprite.min[1], 2.0f, 0.0001f);
}

int main(int argc, char **argv) {
  const struct CMUnitTest tests[] = {
    cmocka_unit_test(test_spriteBatchSpriteTilesetPosition_create),
    cmocka_unit_test(test_spriteBatchSpriteTilesetPosition_zeroSize),
    cmocka_unit_test(test_spriteBatchSpriteTranslate),
  };

  return cmocka_run_group_tests(tests, NULL, NULL);
}