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package cn.binarywang.wx.miniapp.api.impl;

import cn.binarywang.wx.miniapp.api.WxMaAnalysisService;
import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaRetainInfo;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaSummaryTrend;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaUserPortrait;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaVisitDistribution;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaVisitPage;
import cn.binarywang.wx.miniapp.bean.analysis.WxMaVisitTrend;
import cn.binarywang.wx.miniapp.util.json.WxMaGsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.reflect.TypeToken;
import me.chanjar.weixin.common.error.WxErrorException;
import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.reflect.Type;
import java.util.Date;
import java.util.List;

/**
 * @author Charming
 * @since 2018-04-28
 */
public class WxMaAnalysisServiceImpl implements WxMaAnalysisService {
  private static final JsonParser JSON_PARSER = new JsonParser();
  private WxMaService wxMaService;

  public WxMaAnalysisServiceImpl(WxMaService wxMaService) {
    this.wxMaService = wxMaService;
  }

  @Override
  public List getDailySummaryTrend(Date beginDate, Date endDate) throws WxErrorException {
    return getAnalysisResultAsList(GET_DAILY_SUMMARY_TREND_URL, beginDate, endDate,
      new TypeToken>() {
      }.getType());
  }

  @Override
  public List getDailyVisitTrend(Date beginDate, Date endDate) throws WxErrorException {
    return getAnalysisResultAsList(GET_DAILY_VISIT_TREND_URL, beginDate, endDate,
      new TypeToken>() {
      }.getType());
  }

  @Override
  public List getWeeklyVisitTrend(Date beginDate, Date endDate) throws WxErrorException {
    return getAnalysisResultAsList(GET_WEEKLY_VISIT_TREND_URL, beginDate, endDate,
      new TypeToken>() {
      }.getType());
  }

  @Override
  public List getMonthlyVisitTrend(Date beginDate, Date endDate) throws WxErrorException {
    return getAnalysisResultAsList(GET_MONTHLY_VISIT_TREND_URL, beginDate, endDate,
      new TypeToken>() {
      }.getType());
  }

  @Override
  public WxMaVisitDistribution getVisitDistribution(Date beginDate, Date endDate) throws WxErrorException {
    String responseContent = this.wxMaService.post(GET_VISIT_DISTRIBUTION_URL, toJson(beginDate, endDate));
    return WxMaVisitDistribution.fromJson(responseContent);
  }

  @Override
  public WxMaRetainInfo getDailyRetainInfo(Date beginDate, Date endDate) throws WxErrorException {
    return getRetainInfo(beginDate, endDate, GET_DAILY_RETAIN_INFO_URL);
  }

  @Override
  public WxMaRetainInfo getWeeklyRetainInfo(Date beginDate, Date endDate) throws WxErrorException {
    return getRetainInfo(beginDate, endDate, GET_WEEKLY_RETAIN_INFO_URL);
  }

  @Override
  public WxMaRetainInfo getMonthlyRetainInfo(Date beginDate, Date endDate) throws WxErrorException {
    return getRetainInfo(beginDate, endDate, GET_MONTHLY_RETAIN_INFO_URL);
  }

  @Override
  public List getVisitPage(Date beginDate, Date endDate) throws WxErrorException {
    return getAnalysisResultAsList(GET_VISIT_PAGE_URL, beginDate, endDate,
      new TypeToken>() {
      }.getType());
  }

  @Override
  public WxMaUserPortrait getUserPortrait(Date beginDate, Date endDate) throws WxErrorException {
    String responseContent = this.wxMaService.post(GET_USER_PORTRAIT_URL, toJson(beginDate, endDate));
    return WxMaUserPortrait.fromJson(responseContent);
  }

  private WxMaRetainInfo getRetainInfo(Date beginDate, Date endDate, String url) throws WxErrorException {
    String responseContent = this.wxMaService.post(url, toJson(beginDate, endDate));
    return WxMaRetainInfo.fromJson(responseContent);
  }

  /**
   * 获取数据分析结果并返回 List，returnType 类型
   *
   * @param url        链接
   * @param returnType 返回的类型
   * @param         返回的类型
   * @return List 类型的数据
   */
  private  List getAnalysisResultAsList(String url, Date beginDate, Date endDate, Type returnType) throws WxErrorException {
    String responseContent = this.wxMaService.post(url, toJson(beginDate, endDate));
    JsonObject response = JSON_PARSER.parse(responseContent).getAsJsonObject();
    boolean hasList = response.has("list");
    if (hasList) {
      return WxMaGsonBuilder.create().fromJson(response.getAsJsonArray("list"), returnType);
    } else {
      return null;
    }
  }

  private static String toJson(Date beginDate, Date endDate) {
    JsonObject param = new JsonObject();
    param.addProperty("begin_date", DateFormatUtils.format(beginDate, "yyyyMMdd"));
    param.addProperty("end_date", DateFormatUtils.format(endDate, "yyyyMMdd"));
    return param.toString();
  }
}