#include <event/events.h>
#include <scene/components/camera_component.h>
#include <scene/director.h>
#include <utils/logger.h>

namespace extra2d {

Director::Director() {}

Director::~Director() { shutdown(); }

bool Director::init() { return true; }

void Director::shutdown() {
  // 结束当前场景
  if (runningScene_) {
    runningScene_->onExit();
    runningScene_.reset();
  }

  // 清空场景栈
  while (!sceneStack_.empty()) {
    sceneStack_.pop();
  }

  running_ = false;
}

void Director::runScene(Ptr<Scene> scene) {
  if (!scene)
    return;

  // 结束当前场景
  if (runningScene_) {
    runningScene_->onExit();
  }

  // 清空场景栈
  while (!sceneStack_.empty()) {
    sceneStack_.pop();
  }

  // 运行新场景
  runningScene_ = scene;
  runningScene_->onEnter();
  running_ = true;
  needEnd_ = false;
}

void Director::replaceScene(Ptr<Scene> scene) {
  if (!scene)
    return;

  // 结束当前场景
  if (runningScene_) {
    runningScene_->onExit();
  }

  // 替换场景
  runningScene_ = scene;
  runningScene_->onEnter();
}

void Director::pushScene(Ptr<Scene> scene) {
  if (!scene)
    return;

  // 暂停当前场景
  if (runningScene_) {
    // 可以在这里添加暂停逻辑
    sceneStack_.push(runningScene_);
  }

  // 运行新场景
  runningScene_ = scene;
  runningScene_->onEnter();
}

void Director::popScene() {
  if (sceneStack_.empty()) {
    // 没有场景可以弹出，结束运行
    end();
    return;
  }

  // 结束当前场景
  if (runningScene_) {
    runningScene_->onExit();
  }

  // 弹出栈顶场景
  runningScene_ = sceneStack_.top();
  sceneStack_.pop();

  // 恢复场景
  // 可以在这里添加恢复逻辑
}

void Director::end() {
  needEnd_ = true;
  running_ = false;

  if (runningScene_) {
    runningScene_->onExit();
    runningScene_.reset();
  }
}

Scene *Director::getRunningScene() const { return runningScene_.get(); }

CameraComponent *Director::getMainCamera() const {
  if (runningScene_) {
    return runningScene_->getMainCamera();
  }
  return nullptr;
}

void Director::update(float dt) {
  if (!running_ || !runningScene_)
    return;

  runningScene_->update(dt);
}

void Director::render() {
  if (!running_ || !runningScene_)
    return;

  // 从场景获取相机并上传矩阵
  CameraComponent *camera = runningScene_->getMainCamera();
  if (camera) {
    Mat4 viewProj = camera->getViewProjectionMatrix();
    events::OnRenderSetCamera::emit(viewProj);
  } else {
    E2D_LOG_WARN("Director::render: No main camera set!");
  }

  runningScene_->render();
}

} // namespace extra2d