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package com.github.scribejava.httpclient.ahc;

import com.github.scribejava.core.model.OAuthAsyncRequestCallback;
import com.github.scribejava.core.model.OAuthRequest;
import com.github.scribejava.core.model.Response;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.asynchttpclient.AsyncCompletionHandler;

public class OAuthAsyncCompletionHandler extends AsyncCompletionHandler {

    private final OAuthAsyncRequestCallback callback;
    private final OAuthRequest.ResponseConverter converter;

    public OAuthAsyncCompletionHandler(OAuthAsyncRequestCallback callback,
            OAuthRequest.ResponseConverter converter) {
        this.callback = callback;
        this.converter = converter;
    }

    @Override
    public T onCompleted(org.asynchttpclient.Response ahcResponse) throws IOException {
        final Map headersMap = new HashMap<>();
        for (Map.Entry header : ahcResponse.getHeaders()) {
            headersMap.put(header.getKey(), header.getValue());
        }

        final Response response = new Response(ahcResponse.getStatusCode(), ahcResponse.getStatusText(), headersMap,
                ahcResponse.getResponseBodyAsStream());

        @SuppressWarnings("unchecked")
        final T t = converter == null ? (T) response : converter.convert(response);
        if (callback != null) {
            callback.onCompleted(t);
        }
        return t;
    }

    @Override
    public void onThrowable(Throwable t) {
        if (callback != null) {
            callback.onThrowable(t);
        }
    }
};