using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using GoogleMobileAds.Api;
using UnityEngine;

namespace WZ
{
    public class AdmobNativeAdManager
    {
        private Dictionary<string, NativeOverlayAd> _nativeAds = new Dictionary<string, NativeOverlayAd>();
        private Dictionary<string, double> _adRevenueCache = new Dictionary<string, double>();
        private Dictionary<string, int> _retryCounters = new Dictionary<string, int>();

        public void InitializeAdUnits(List<string> adUnitIds)
        {
            foreach (var adUnitId in adUnitIds)
            {
                CreateNativeAd(adUnitId);
            }
        }

        private void CreateNativeAd(string adUnitId)
        {
            if (_nativeAds.ContainsKey(adUnitId))
            {
                LoggerUtils.Debug($"[Admob] Native Ad unit {adUnitId} already exists");
                return;
            }

            LoadAd(adUnitId);
            _adRevenueCache[adUnitId] = 0;
        }

        public void LoadAd(string adUnitId)
        {
            LoggerUtils.Debug($"[Admob] Native Ad unit {adUnitId} load start");

            NativeOverlayAd.Load(adUnitId, new AdRequest(), new NativeAdOptions(), (NativeOverlayAd ad, LoadAdError error) =>
            {
                LoggerUtils.Debug($"[Admob] Native Ad unit {adUnitId} load end. {ad} error {error}");
                if (error != null || ad == null)
                {
                    if (!_retryCounters.TryAdd(adUnitId, 0))
                    {
                        _retryCounters[adUnitId]++;
                    }

                    var retryDelay = Math.Pow(2, Math.Min(6, _retryCounters[adUnitId]));
                    TimerUtils.Instance.DelayExecute((float)retryDelay, () => { LoadAd(adUnitId); });
                    LoggerUtils.Debug("[Admob] Native ad failed to load an ad with error : " + error + " \n retryDelay :" + retryDelay);
                    return;
                }

                _retryCounters[adUnitId] = 0;

                var nativeEcpm = AdmobUtils.GetNativeEcpm(ad);
                _nativeAds[adUnitId] = ad;
                _adRevenueCache[adUnitId] = nativeEcpm;
                LoggerUtils.Debug($"Admob Native ad loaded with nativeEcpm = {nativeEcpm} response : " + ad.GetResponseInfo().ToString());
                AdsKeyEvents.Instance.LogAdFPUEvents(AdsType.Native);

                ad.OnAdPaid += (AdValue adValue) =>
                {
                    LoggerUtils.Debug($"[Admob] Native ad paid {adValue.Value} {adValue.CurrencyCode}.");
                    AdmobAdsManager.Instance.TrackAdImpression(ad.GetResponseInfo().GetLoadedAdapterResponseInfo(),
                        adValue,
                        AdsType.Native,
                        adUnitId);
                };

                ad.OnAdImpressionRecorded += () => { LoggerUtils.Debug("[Admob] Native ad recorded an impression."); };

                ad.OnAdClicked += () => { LoggerUtils.Debug("[Admob] Native ad was clicked."); };

                ad.OnAdFullScreenContentOpened += () => { LoggerUtils.Debug("[Admob] Native ad full screen content opened."); };

                ad.OnAdFullScreenContentClosed += () => { LoggerUtils.Debug("[Admob] Native ad full screen content closed."); };
            });
        }

        // 显示价格最高的广告
        public void ShowHighestPayingAd(NativeAdPosition position)
        {
            LoggerUtils.Debug($"[Admob] Native ad ShowHighestPayingAd {position}");
            var highestPayingAdUnit = GetHighestPayingAdUnit();

            LoggerUtils.Debug($"[Admob] Native ad ShowHighestPayingAd {position} , highestPayingAdUnit = {highestPayingAdUnit}");
            if (!string.IsNullOrEmpty(highestPayingAdUnit))
            {
                ShowAd(position, highestPayingAdUnit);
            }
        }

        // 显示特定广告位的广告
        public void ShowAd(NativeAdPosition position, string adUnitId)
        {
            LoggerUtils.Debug($"[Admob] Native ad ShowAd start {adUnitId} , {position}");

            if (_nativeAds.TryGetValue(adUnitId, out var ad))
            {
                LoggerUtils.Debug($"[Admob] Native ad ShowAd end {adUnitId} , {position}");

                // Define a native template style with a custom style.
                var style = position.NativeTemplateStyle ?? new NativeTemplateStyle()
                {
                    TemplateId = NativeTemplateId.Medium,
                    // TemplateId = "big"
                    //  MainBackgroundColor = Color.green,
                    CallToActionText = new NativeTemplateTextStyle()
                    {
                        FontSize = 9,
                        Style = NativeTemplateFontStyle.Bold
                    }
                };

                // Renders a native overlay ad at the default size
                // and anchored to the bottom of the screne.
                ad.RenderTemplate(style, new AdSize(position.Width, position.Height), position.X, position.Y);

                ad.Show();
            }
        }


        // 检查特定广告位是否可用
        public bool IsAdAvailable(string adUnitId)
        {
            return _nativeAds.TryGetValue(adUnitId, out _);
        }

        // 获取所有可用的广告位
        public List<string> GetAvailableAdUnits()
        {
            return _nativeAds.Select(kvp => kvp.Key).ToList();
        }

        // 获取价格最高的广告位ID
        public string GetHighestPayingAdUnit()
        {
            string highestPayingAdUnit = null;
            double highestRevenue = -1;
            LoggerUtils.Debug($"[Admob] Native ad GetHighestPayingAdUnit {_adRevenueCache.Count}");

            foreach (var kvp in _adRevenueCache)
            {
                var adUnitId = kvp.Key;
                var revenue = kvp.Value;

                // 确保广告确实已加载并且价格更高
                if (IsAdAvailable(adUnitId) && revenue > highestRevenue)
                {
                    highestRevenue = revenue;
                    highestPayingAdUnit = adUnitId;
                }
            }

            return highestPayingAdUnit;
        }

        // 获取价格最高的广告收益信息
        public double GetHighestPayingAdRevenue()
        {
            var highestPayingAdUnit = GetHighestPayingAdUnit();
            if (!string.IsNullOrEmpty(highestPayingAdUnit) &&
                _adRevenueCache.TryGetValue(highestPayingAdUnit, out var revenue))
            {
                return revenue;
            }

            return 0;
        }

        // 清理资源
        public void Destroy()
        {
            foreach (var ad in _nativeAds.Values)
            {
                ad.Destroy();
            }

            _nativeAds.Clear();
            _adRevenueCache.Clear();
        }

        public void RemoveNative(string adUnitId)
        {
            if (adUnitId == null || string.IsNullOrEmpty(adUnitId))
            {
                foreach (var nativeOverlayAd in _nativeAds)
                {
                    nativeOverlayAd.Value.Hide();
                    LoadAd(nativeOverlayAd.Key);
                }

                return;
            }

            if (_nativeAds.TryGetValue(adUnitId, out var tempAd))
            {
                tempAd.Hide();
                LoadAd(adUnitId);
            }
        }
    }
}