#include "Seaweed.h"
#include "../core/Aquarium.h"
#include "../utils/Random.h"
#include "../utils/defs.h"

Seaweed::Seaweed()
    : Entity(),
      height(Random::intInRange(SEAWEED_MIN_HEIGHT, SEAWEED_MAX_HEIGHT)),
      speed(Random::floatInRange(0.1f, 0.3f)),
      lifetime(Random::intInRange(SEAWEED_MIN_LIFETIME, SEAWEED_MAX_LIFETIME)) {

  x = Random::intInRange(0, Aquarium::getInstance().getWidth());
  y = Aquarium::getInstance().getHeight() - height;

  current_image.resize(height);
  current_mask.resize(height);
  generateCurrentFrame();
}

void Seaweed::update() noexcept {
  frame += speed;
  if (frame >= 1.0f) {
    pattern_flipped = !pattern_flipped;
    frame -= 1.0f;
    frame_dirty = true; // mark frame as needing regeneration
  }
  --lifetime;
}

const std::vector<std::string> &Seaweed::getImage() const {
  if (frame_dirty) {
    generateCurrentFrame();
    frame_dirty = false;
  }
  return current_image;
}

const std::vector<std::string> &Seaweed::getMask() const {
  if (frame_dirty) {
    generateCurrentFrame();
    frame_dirty = false;
  }
  return current_mask;
}

void Seaweed::generateCurrentFrame() const {
  for (size_t i = 0; i < height; ++i) {
    const bool use_left = (i % 2 == 0) ^ pattern_flipped;
    const char ch = use_left ? PATTERN_LEFT : PATTERN_RIGHT;
    const int offset = use_left ? 0 : 1;

    current_image[i] = std::string(offset, ' ') + ch;
    current_mask[i] = std::string(current_image[i].size(), 'g');
  }
}

bool Seaweed::shouldBeRemoved() const noexcept { return lifetime == 0; }

std::unique_ptr<Entity> Seaweed::createReplacement() const {
  return std::make_unique<Seaweed>();
}

int Seaweed::getPreferredLayer() const noexcept { return 1; }