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package me.chanjar.weixin.common.util.http.okhttp;

import me.chanjar.weixin.common.error.WxError;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.common.util.http.BaseMediaDownloadRequestExecutor;
import me.chanjar.weixin.common.util.http.HttpResponseProxy;
import me.chanjar.weixin.common.util.http.RequestHttp;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okio.BufferedSink;
import okio.Okio;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;

/**
 * Created by ecoolper on 2017/5/5.
 */
public class OkHttpMediaDownloadRequestExecutor extends BaseMediaDownloadRequestExecutor {
  private final Logger logger = LoggerFactory.getLogger(this.getClass());

  public OkHttpMediaDownloadRequestExecutor(RequestHttp requestHttp, File tmpDirFile) {
    super(requestHttp, tmpDirFile);
  }

  @Override
  public File execute(String uri, String queryParam) throws WxErrorException, IOException {
    logger.debug("OkHttpMediaDownloadRequestExecutor is running");
    if (queryParam != null) {
      if (uri.indexOf('?') == -1) {
        uri += '?';
      }
      uri += uri.endsWith("?") ? queryParam : '&' + queryParam;
    }

    //得到httpClient
    OkHttpClient client = requestHttp.getRequestHttpClient();

    Request request = new Request.Builder().url(uri).get().build();

    Response response = client.newCall(request).execute();

    String contentType = response.header("Content-Type");
    if (contentType != null && contentType.startsWith("application/json")) {
      // application/json; encoding=utf-8 下载媒体文件出错
      throw new WxErrorException(WxError.fromJson(response.body().string()));
    }

    String fileName = new HttpResponseProxy(response).getFileName();
    if (StringUtils.isBlank(fileName)) {
      return null;
    }

    File file = File.createTempFile(
      FilenameUtils.getBaseName(fileName), "." + FilenameUtils.getExtension(fileName), super.tmpDirFile
    );

    try (BufferedSink sink = Okio.buffer(Okio.sink(file))) {
      sink.writeAll(response.body().source());
    }

    file.deleteOnExit();
    return file;
  }

}