package com.ynxbd.wx.wxfactory;

import com.ynxbd.common.bean.User;
import com.ynxbd.common.helper.common.Base64Helper;
import com.ynxbd.common.helper.common.CodeHelper;
import com.ynxbd.common.helper.common.JsonHelper;
import com.ynxbd.common.result.Result;
import com.ynxbd.common.service.PatientService;
import com.ynxbd.wx.config.WeChatConfig;
import com.ynxbd.wx.wxfactory.bean.SnsOath2AccessToken;
import com.ynxbd.wx.wxfactory.bean.SnsUserInfo;
import org.ehcache.Cache;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class WxAuthHelper {

    public static String auth(HttpServletRequest request, HttpServletResponse response, boolean isUserInfo) {
        String code = request.getParameter("code");
        String state = request.getParameter("state");
        String hash = request.getParameter("hash");

        try {
            if (hash == null) {
                hash = "";
            } else {
                hash = Base64Helper.decode(hash);
                hash = URLDecoder.decode(hash, "UTF-8");
            }

            SnsOath2AccessToken snsToken = WxFactory.Base.OAuth().oauth2AccessToken(WeChatConfig.APP_ID, WeChatConfig.APP_SECRET, code);
            if (snsToken != null) {
                String openid = snsToken.getOpenid();
                if (openid != null) {
                    request.getSession().setAttribute("openid", openid);

                    Cache<String, User> cache = WxCacheHelper.getUserCache();
                    if (!cache.containsKey(openid)) {
                        String unionId = snsToken.getUnionid();
                        User user = new User();
                        user.setUnionId(unionId);
                        user.setOpenid(openid);
                        user.setIsSnapShotUser(snsToken.getIsSnapShotUser());

                        user.setPatientList(new PatientService().getPatientList(openid, unionId, true));

                        if (isUserInfo) {
                            SnsUserInfo snsUser = WxFactory.Base.OAuth().snsUserInfo(snsToken.getAccessToken(), openid, "zh_CN", 3);
                            if (snsUser != null) {
                                user.setCountry(snsUser.getCountry());
                                user.setAvatar(snsUser.getHeadImgUrl());
                                user.setNickName(snsUser.getNickname_emoji());
                                user.setProvince(snsUser.getProvince());
                                Integer sex = snsUser.getSex();
                                if (sex != null) {
                                    user.setGender(sex == 1 ? "男" : "女");
                                }
                                user.setCity(snsUser.getCity());
                                user.setLanguage(snsUser.getLanguage());
                            }
                        }
                        cache.put(openid, user);
                    } else {
                        if (isUserInfo) {
                            User user = cache.get(openid);
                            if (user != null && user.getAvatar() == null && user.getNickName() == null) {
                                SnsUserInfo snsUser = WxFactory.Base.OAuth().snsUserInfo(snsToken.getAccessToken(), openid, "zh_CN", 3);
                                if (snsUser != null) {
                                    user.setAvatar(snsUser.getHeadImgUrl());
                                    user.setNickName(snsUser.getNickname_emoji());
                                    Integer sex = snsUser.getSex();
                                    if (sex != null) {
                                        user.setGender(sex == 1 ? "男" : "女");
                                    }
                                }
                            }
                        }
                    }
                }
            }

            if (hash == null) hash = "";
            if (state == null) state = "";

            if (state.contains(".html")) {
                return state + hash;
            } else {
                String baseUrl = WeChatConfig.getBaseUrl();
                if (baseUrl != null && state.contains(baseUrl)) {
                    return state + hash;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    public static Result isAuth(HttpServletRequest request) throws Exception {
        HttpSession session = request.getSession();
        Object openid = session.getAttribute("openid");

        if (openid != null) {
            User user = WxCacheHelper.getCacheUser((String) openid);
            if (user == null) {
                return Result.success(getAuthUrl(request));
            }

            String isUserInfo = request.getParameter("isUserInfo");
            if ("true".equals(isUserInfo)) { // 更换授权模式，需更新信息
                if (user.getNickName() == null || user.getAvatar() == null) {
                    return Result.success(getAuthUrl(request));
                }
            }

            Map<String, Object> map = new HashMap<>();
            map.put("openid", openid);
            map.put("unionId", user.getUnionId());
            map.put("date", new Date());
            map.put("avatar", user.getAvatar());
            map.put("nickName", user.getNickName());
            map.put("patients", CodeHelper.get28UUID() + Base64Helper.encode(URLEncoder.encode(JsonHelper.toJsonString(user.getPatientList()), "UTF-8")));
            map.put("hash", request.getParameter("hash"));

            return Result.success(map);
        }

        return Result.success(getAuthUrl(request));
    }


    private static final String OAUTH_URL = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + WeChatConfig.APP_ID + "&redirect_uri=";


    private static String getAuthUrl(HttpServletRequest request) {
//        StringBuffer url = request.getRequestURL();
//        String baseUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).append(request.getServletContext().getContextPath()).append("/").toString();
        String state = request.getParameter("state");
        String hash = request.getParameter("hash");
        String isUserInfo = request.getParameter("isUserInfo");

        if (hash == null) {
            hash = "";
        }

        if (state != null) {
            String decode = Base64Helper.decode(state);
            if (!decode.contains(".html") && !decode.contains(".jsp")) {
                decode = "my-info.html";
            }

            String api = ("true".equals(isUserInfo) ? "u_auth" : "b_auth");
            String scope = ("true".equals(isUserInfo) ? "snsapi_userinfo" : "snsapi_base");

            state = OAUTH_URL + WeChatConfig.getBaseUrl() + "wx_auth/" + api +
                    "?hash=" + hash + "&response_type=code" +
                    "&scope=" + scope + "&forcePopup=true" +
                    "&state=" + decode + "#wechat_redirect";
            state = Base64Helper.encode(state);
        }
        return state;
    }

}