#if UNITY_IOS //&& !UNITY_EDITOR
using System;
using System.Runtime.InteropServices;
using Azerion.BlueStack.API;
using Azerion.BlueStack.Internal;

namespace Azerion.BlueStack.Platforms.iOS
{
    public class NativeAdClient : INativeAdClient, IDisposable
    {
        private IntPtr _nativeAdPtr;
        private IntPtr _nativeAdClientPtr;

        #region NativeAd callback types

        internal delegate void BSUOnNativeAdDidLoadCallback(IntPtr nativeClient);

        internal delegate void BSUOnNativeAdDidFailedCallback(IntPtr nativeClient, IntPtr error);

        internal delegate void BSUOnNativeAdDidRecordImpressionCallback(IntPtr nativeClient);

        internal delegate void BSUOnNativeAdDidPerformClickCallback(IntPtr nativeClient);

        internal delegate void BSUOnNativeAdCloseCallback(IntPtr nativeClient);

        #endregion

        // This property should be used when setting the nativeViewPtr.
        private IntPtr NativeAdPtr
        {
            get => this._nativeAdPtr;

            set
            {
                Externs.BSURelease(this._nativeAdPtr);
                this._nativeAdPtr = value;
            }
        }

        #region Native callback methods

        [AOT.MonoPInvokeCallback(typeof(BSUOnNativeAdDidLoadCallback))]
        private static void OnNativeAdDidLoadCallback(IntPtr bannerClient)
        {
            NativeAdClient client = IntPtrToNativeAdClient(bannerClient);
            if (client.OnNativeAdDidLoad != null)
            {
                client.OnNativeAdDidLoad(client, EventArgs.Empty);
            }
        }

        [AOT.MonoPInvokeCallback(typeof(BSUOnNativeAdDidFailedCallback))]
        private static void OnNativeAdDidFailCallback(IntPtr nativeClient, IntPtr error)
        {
            NativeAdClient client = IntPtrToNativeAdClient(nativeClient);
            if (client.OnNativeAdDidFail != null)
            {
                client.OnNativeAdDidFail(client, BlueStackErrorUtils.CreateFromIntPtr(error));
            }
        }

        [AOT.MonoPInvokeCallback(typeof(BSUOnNativeAdDidLoadCallback))]
        private static void OnNativeAdDidRecordImpressionCallback(IntPtr bannerClient)
        {
            NativeAdClient client = IntPtrToNativeAdClient(bannerClient);
            if (client.OnNativeAdImpression != null)
            {
                client.OnNativeAdImpression(client, EventArgs.Empty);
            }
        }

        [AOT.MonoPInvokeCallback(typeof(BSUOnNativeAdDidLoadCallback))]
        private static void OnNativeAdDidPerformClickCallback(IntPtr bannerClient)
        {
            NativeAdClient client = IntPtrToNativeAdClient(bannerClient);
            if (client.OnNativeAdClicked != null)
            {
                client.OnNativeAdClicked(client, EventArgs.Empty);
            }
        }

        [AOT.MonoPInvokeCallback(typeof(BSUOnNativeAdDidLoadCallback))]
        private static void OnNativeAdCloseCallback(IntPtr bannerClient)
        {
            NativeAdClient client = IntPtrToNativeAdClient(bannerClient);
            if (client.OnNativeAdClosed != null)
            {
                client.OnNativeAdClosed(client, EventArgs.Empty);
            }
        }

        private static NativeAdClient IntPtrToNativeAdClient(IntPtr nativeClient)
        {
            GCHandle handle = (GCHandle)nativeClient;
            return handle.Target as NativeAdClient;
        }

        #endregion

        public void Destroy()
        {
            this.DestroyNativeAd();
        }

        // Destroys the banner ad.
        private void DestroyNativeAd()
        {
            Externs.BSUDestroyNativeAd(this.NativeAdPtr);
            this.NativeAdPtr = IntPtr.Zero;
        }

        public void Dispose()
        {
            this.DestroyNativeAd();
            ((GCHandle)this._nativeAdClientPtr).Free();
        }

        ~NativeAdClient()
        {
            this.Dispose();
        }

        public event EventHandler<EventArgs> OnNativeAdDidLoad;
        public event EventHandler<BlueStackError> OnNativeAdDidFail;
        public event EventHandler<EventArgs> OnNativeAdImpression;
        public event EventHandler<EventArgs> OnNativeAdClicked;
        public event EventHandler<EventArgs> OnNativeAdOpening;
        public event EventHandler<EventArgs> OnNativeAdClosed;

        public void Create(string placementId)
        {
            this._nativeAdClientPtr = (IntPtr)GCHandle.Alloc(this);

            this.NativeAdPtr = Externs.BSUCreateNativeAd(
                this._nativeAdClientPtr, placementId);

            Externs.BSUSetNativeAdCallbacks(
                this.NativeAdPtr,
                OnNativeAdDidLoadCallback,
                OnNativeAdDidFailCallback,
                OnNativeAdDidRecordImpressionCallback,
                OnNativeAdDidPerformClickCallback,
                OnNativeAdCloseCallback
            );
        }

        public void Load()
        {
            Externs.BSULoadNativeAd(this.NativeAdPtr);
        }

        public void Load(IPreferenceClient iPreferenceClient)
        {
            PreferenceClient preferenceClient = (PreferenceClient)iPreferenceClient;
            Externs.BSULoadNativeAdWithRequestOptions(this.NativeAdPtr, preferenceClient.GetPreferenceClientPtr());
        }

        public string GetTitle()
        {
            return Externs.BSUNativeAdGetTitle(this.NativeAdPtr);
        }

        public string GetBodyText()
        {
            return Externs.BSUNativeAdGetBodyText(this.NativeAdPtr);
        }

        public string GetCallToActionText()
        {
            return Externs.BSUNativeAdGetCTAText(this.NativeAdPtr);
        }

        public byte[] GetBadgeBytes()
        {
            return Array.Empty<byte>();
        }

        public string GetBadge()
        {
            return Externs.BSUNativeAdGetBadge(this.NativeAdPtr);
        }

        public string GetCoverImageUrl()
        {
            return Externs.BSUNativeAdGetCoverImageUrl(this.NativeAdPtr);
        }

        public string GetIconUrl()
        {
            return Externs.BSUNativeAdGetIconUrl(this.NativeAdPtr);
        }

        public string GetClickUrl()
        {
            return Externs.BSUNativeAdGetClickUrl(this.NativeAdPtr);
        }

        public void RecordImpression()
        {
            Externs.BSURecordImpression(this.NativeAdPtr);
        }

        public void PerformClick()
        {
            Externs.BSUPerformClick(this.NativeAdPtr);
        }
    }
}

#endif