// This file is part of the 64k demo project.
// It tests the procedural generation system.

#include "procedural/generator.h"
#include <cassert>
#include <iostream>
#include <vector>

void test_noise() {
  std::cout << "Testing Noise Generator..." << std::endl;
  int w = 64, h = 64;
  std::vector<uint8_t> buffer(w * h * 4);
  float params[] = {12345, 1.0f}; // Seed, Intensity

  procedural::gen_noise(buffer.data(), w, h, params, 2);

  // Check simple properties: alpha should be 255
  assert(buffer[3] == 255);
  // Check that not all pixels are black (very unlikely with noise)
  bool nonzero = false;
  for (size_t i = 0; i < buffer.size(); i += 4) {
    if (buffer[i] > 0) {
      nonzero = true;
      break;
    }
  }
  assert(nonzero);
}

void test_grid() {
  std::cout << "Testing Grid Generator..." << std::endl;
  int w = 100, h = 100;
  std::vector<uint8_t> buffer(w * h * 4);
  float params[] = {10, 1}; // Size 10, Thickness 1

  procedural::gen_grid(buffer.data(), w, h, params, 2);

  // Pixel (0,0) should be white (on line)
  assert(buffer[0] == 255);
  // Pixel (5,5) should be black (off line, since size=10)
  assert(buffer[(5 * w + 5) * 4] == 0);
  // Pixel (10,0) should be white (on vertical line)
  assert(buffer[(0 * w + 10) * 4] == 255);
}

int main() {
  test_noise();
  test_grid();
  std::cout << "--- PROCEDURAL TESTS PASSED ---" << std::endl;
  return 0;
}