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package com.applovin.mediation.adapters.prebid;

import android.os.Bundle;
import android.util.Log;
import androidx.annotation.Nullable;
import com.applovin.mediation.adapter.parameters.MaxAdapterResponseParameters;
import org.prebid.mobile.ParametersMatcher;
import org.prebid.mobile.PrebidNativeAd;
import org.prebid.mobile.rendering.bidding.data.bid.BidResponse;
import org.prebid.mobile.rendering.bidding.display.BidResponseCache;

import java.util.HashMap;
import java.util.Map;

import static com.applovin.mediation.adapters.PrebidMaxMediationAdapter.EXTRA_KEYWORDS_ID;
import static com.applovin.mediation.adapters.PrebidMaxMediationAdapter.EXTRA_RESPONSE_ID;

public class ParametersChecker {

    private static final String TAG = ParametersChecker.class.getSimpleName();

    @Nullable
    public static String getResponseIdAndCheckKeywords(
            MaxAdapterResponseParameters parameters,
            OnError onErrorListener
    ) {
        String responseId = getResponseId(parameters, onErrorListener);
        if (responseId == null) {
            return null;
        }

        Bundle serverParameters = parameters.getCustomParameters();
        HashMap prebidParameters = BidResponseCache.getInstance().getKeywords(responseId);
        if (!ParametersMatcher.doParametersMatch(serverParameters, prebidParameters)) {
            onErrorListener.onError(1003, "Parameters don't match");
            return null;
        }

        return responseId;
    }

    @Nullable
    public static BidResponse getBidResponse(
            @Nullable String responseId,
            OnError onErrorListener
    ) {
        if (responseId == null) {
            return null;
        }

        BidResponse response = BidResponseCache.getInstance().popBidResponse(responseId);
        if (response == null) {
            onErrorListener.onError(1004, "There's no response for id: " + responseId);
            return null;
        }

        return response;
    }

    @SuppressWarnings("unchecked")
    @Nullable
    public static PrebidNativeAd getNativeAd(
            MaxAdapterResponseParameters parameters,
            OnError onErrorListener
    ) {
        try {
            String responseId = getResponseId(parameters, onErrorListener);
            if (responseId == null) {
                return null;
            }

            Map extras = parameters.getLocalExtraParameters();
            if (!extras.containsKey(EXTRA_KEYWORDS_ID) || !(extras.get(EXTRA_KEYWORDS_ID) instanceof HashMap)) {
                onErrorListener.onError(1005, "Keywords are null");
                return null;
            }

            HashMap prebidParameters = (HashMap) extras.get(EXTRA_KEYWORDS_ID);
            Bundle serverParameters = parameters.getCustomParameters();
            if (!ParametersMatcher.doParametersMatch(serverParameters, prebidParameters)) {
                onErrorListener.onError(1006, "Parameters don't match");
                return null;
            }

            PrebidNativeAd prebidNativeAd = PrebidNativeAd.create(responseId);
            if (prebidNativeAd == null) {
                onErrorListener.onError(1007, "Can't get prebid native ad");
            }
            return prebidNativeAd;
        } catch (Exception exception) {
            String error = "Can't get PrebidNativeAd: " + exception.getMessage();
            Log.e(TAG, error);
            onErrorListener.onError(1008, error);
        }
        return null;
    }

    @Nullable
    private static String getResponseId(
            MaxAdapterResponseParameters parameters,
            OnError onErrorListener
    ) {
        if (parameters == null || parameters.getCustomParameters() == null || parameters.getLocalExtraParameters() == null) {
            onErrorListener.onError(1001, "Parameters are empty!"); return null;
        }

        Map extras = parameters.getLocalExtraParameters();
        if (!extras.containsKey(EXTRA_RESPONSE_ID) || !(extras.get(EXTRA_RESPONSE_ID) instanceof String) || extras.get(
            EXTRA_RESPONSE_ID) == null) {
            onErrorListener.onError(1002, "Response id is null"); return null;
        } return (String) extras.get(EXTRA_RESPONSE_ID);
    }

    public interface OnError {

        void onError(
                int code,
                String error
        );

    }

}