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

#include "dusktest.h"
#include "ui/frame/uiframe.h"

static void test_uiFrameBuildSprites_layout(void **state) {
  UI_FRAME.tileset = (tileset_t){
    .tileWidth = 1,
    .tileHeight = 1,
    .tileCount = 9,
    .columns = 3,
    .rows = 3,
    .uv = { 0.25f, 0.25f }
  };

  const float_t x = 100.0f;
  const float_t y = 50.0f;
  const float_t width = 40.0f;
  const float_t height = 30.0f;
  const float_t tileW = (float_t)UI_FRAME_BORDER_WIDTH;
  const float_t tileH = (float_t)UI_FRAME_BORDER_HEIGHT;

  spritebatchsprite_t sprites[9];
  uiFrameBuildSprites(sprites, x, y, width, height);

  // Top-left corner sits exactly at the rect's origin.
  assert_float_equal(sprites[0].min[0], x, 0.0001f);
  assert_float_equal(sprites[0].min[1], y, 0.0001f);
  assert_float_equal(sprites[0].max[0], x + tileW, 0.0001f);
  assert_float_equal(sprites[0].max[1], y + tileH, 0.0001f);
  assert_float_equal(sprites[0].uvMin[0], 0.0f, 0.0001f);
  assert_float_equal(sprites[0].uvMin[1], 0.0f, 0.0001f);
  assert_float_equal(sprites[0].uvMax[0], 0.25f, 0.0001f);
  assert_float_equal(sprites[0].uvMax[1], 0.25f, 0.0001f);

  // Top-middle edge stretches to fill the width minus both corners.
  assert_float_equal(sprites[1].min[0], x + tileW, 0.0001f);
  assert_float_equal(sprites[1].max[0], x + width - tileW, 0.0001f);
  assert_float_equal(sprites[1].max[1], y + tileH, 0.0001f);

  // Center tile fills the remaining interior on both axes.
  assert_float_equal(sprites[4].min[0], x + tileW, 0.0001f);
  assert_float_equal(sprites[4].min[1], y + tileH, 0.0001f);
  assert_float_equal(sprites[4].max[0], x + width - tileW, 0.0001f);
  assert_float_equal(sprites[4].max[1], y + height - tileH, 0.0001f);

  // Bottom-right corner sits exactly at the rect's far corner, sampling
  // tileset column 2, row 2.
  assert_float_equal(sprites[8].min[0], x + width - tileW, 0.0001f);
  assert_float_equal(sprites[8].min[1], y + height - tileH, 0.0001f);
  assert_float_equal(sprites[8].max[0], x + width, 0.0001f);
  assert_float_equal(sprites[8].max[1], y + height, 0.0001f);
  assert_float_equal(sprites[8].uvMin[0], 0.5f, 0.0001f);
  assert_float_equal(sprites[8].uvMin[1], 0.5f, 0.0001f);
}

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

  return cmocka_run_group_tests(tests, NULL, NULL);
}