const config = require("../config/index");

function showRewardedVideoAd() {
  return new Promise((resolve, reject) => {
    if (!config.adUnitId) {
      console.warn("adUnitId 未配置，跳过广告流程（仅限开发环境）");
      resolve("ad_skipped");
      return;
    }
    if (typeof tt === "undefined" || !tt.createRewardedVideoAd) {
      reject(new Error("rewarded_ad_unavailable"));
      return;
    }
    const ad = tt.createRewardedVideoAd({
      adUnitId: config.adUnitId
    });

    const cleanup = () => {
      if (!ad) {
        return;
      }
      if (ad.offLoad) {
        ad.offLoad();
      }
      if (ad.offError) {
        ad.offError();
      }
      if (ad.offClose) {
        ad.offClose();
      }
    };

    ad.onError((error) => {
      cleanup();
      reject(error);
    });

    ad.onClose((result = {}) => {
      cleanup();
      if (result.isEnded) {
        resolve();
      } else {
        const err = new Error("ad_not_completed");
        err.code = "ad_not_completed";
        reject(err);
      }
    });

    ad
      .load()
      .then(() => ad.show())
      .catch((error) => {
        cleanup();
        reject(error);
      });
  });
}

module.exports = {
  showRewardedVideoAd
};