import "package:flutter/foundation.dart";
import "package:flutter/widgets.dart";
import "package:google_mobile_ads/google_mobile_ads.dart";
import "ad_service.dart";

class AdMobService implements AdService {
  BannerAd? _bannerAd;
  bool _isLoaded = false;

  // Ad unit IDs
  static const String _androidBannerAdUnitId = "ca-app-pub-5177609929140951/8415596856";
  static const String _iosBannerAdUnitId = "ca-app-pub-5177609929140951/7102515188";

  String get _bannerAdUnitId {
    if (defaultTargetPlatform == TargetPlatform.android) {
      return _androidBannerAdUnitId;
    } else if (defaultTargetPlatform == TargetPlatform.iOS) {
      return _iosBannerAdUnitId;
    } else {
      throw UnsupportedError("Platform not supported");
    }
  }

  @override
  Future<void> initialize() async {
    await MobileAds.instance.initialize();
    print("AdMob initialized");
  }

  @override
  Future<void> loadBannerAd() async {
    _bannerAd = BannerAd(
      adUnitId: _bannerAdUnitId,
      size: AdSize.banner,
      request: const AdRequest(),
      listener: BannerAdListener(
        onAdLoaded: (ad) {
          print("Banner ad loaded");
          _isLoaded = true;
        },
        onAdFailedToLoad: (ad, error) {
          print("Banner ad failed to load: $error");
          ad.dispose();
          _isLoaded = false;
        },
      ),
    );

    await _bannerAd!.load();
  }

  @override
  Widget getBannerWidget() {
    if (_bannerAd == null || !_isLoaded) {
      return SizedBox.shrink();
    }

    return SizedBox(
      height: 50,
      child: AdWidget(ad: _bannerAd!),
    );
  }

  @override
  void dispose() {
    _bannerAd?.dispose();
    _bannerAd = null;
    _isLoaded = false;
  }

  @override
  bool get isLoaded => _isLoaded;
}