package com.ynxbd.wx.wxfactory;

import com.ynxbd.common.bean.Patient;
import com.ynxbd.common.bean.User;
import com.ynxbd.common.helper.common.*;
import com.ynxbd.common.helper.http.OkHttpHelper;
import com.ynxbd.common.result.Result;
import com.ynxbd.common.service.PatientService;
import com.ynxbd.wx.config.WeChatConfig;
import com.ynxbd.wx.wxfactory.base.auth.models.AuthData;
import com.ynxbd.wx.wxfactory.base.auth.models.SnsOath2AccessToken;
import com.ynxbd.wx.wxfactory.base.auth.models.SnsUserInfo;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.ObjectUtils;
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.*;

@Slf4j
public class WxAuthHelper {
    private static final int SESSION_MAX_INACTIVE_INTERVAL = 60 * 60;  // session最大存活时间 1H

    private static final String P_PREFIX = "_@"; // 前缀
    private static final String P_SUFFIX = ":";  // 后缀

    private static final String AUTH_SESSION_ID_NAME = "SID";
    private static final String UNION_ID_NAME = "UID";


    public static String auth(HttpServletRequest request, HttpServletResponse response, boolean isUserInfo) {
        String code = request.getParameter("code");
        String state = request.getParameter("state"); // base64
        Map<String, String> paramsMap = getParamsMap(request.getParameter("p"));

        log.info("[授权] code={}, state={}, paramsMap={}", code, state, JsonHelper.toJsonString(paramsMap));
        try {
            state = state == null ? "" : URLDecoder.decode(Base64Helper.decode(state), "UTF-8");
            String enUnionId = paramsMap.get(UNION_ID_NAME);
            String enAuthSessionId = paramsMap.get(AUTH_SESSION_ID_NAME);
            String authSessionId = AesWxHelper.decode(enAuthSessionId);

            paramsMap.get(AUTH_SESSION_ID_NAME);

//            if (!ObjectUtils.isEmpty(params)) {
//                int index = params.indexOf("@" + AUTH_SESSION_ID_NAME + ":");
//                if (index == -1) index = params.indexOf("%40" + AUTH_SESSION_ID_NAME + ":"); // 防止数据转义失败
//                if (index != -1) {
//                    enUnionId = params.substring(0, index);
//                    authSessionId = params.substring(index);
//                    authSessionId = AesWxHelper.decode(authSessionId);
//                }
//            }
            log.info("[授权-解码] enUnionId={}, enAuthSessionId={}, authSessionId={}, state={}", enUnionId, enAuthSessionId, authSessionId, state);

            SnsOath2AccessToken snsToken = WxFactory.Base.OAuth().oauth2AccessToken(WeChatConfig.APP_ID, WeChatConfig.APP_SECRET, code);
            log.info("[授权-用户]snsToken={}", JsonHelper.toJsonString(snsToken));
            if (snsToken != null) {
                String openid = snsToken.getOpenid();
                String unionId = snsToken.getUnionid();
                if (unionId == null) {
                    log.info("[测试] enUnionId={}", enUnionId);
                }
                if (openid != null) {
                    HttpSession session = request.getSession();
                    session.setMaxInactiveInterval(SESSION_MAX_INACTIVE_INTERVAL);
                    session.setAttribute("openid", openid);
                    WxCacheHelper.putOpenIdToAIDCache(authSessionId, openid);

                    Cache<String, User> cache = WxCacheHelper.getUserCacheManager();
                    if (WeChatConfig.isDevUser(openid) || !cache.containsKey(openid)) {
                        User user = new User();
                        user.setUnionId(unionId);
                        user.setOpenid(openid);
                        user.setIsSnapShotUser(snsToken.getIsSnapShotUser());
                        user.setPatientList(new PatientService().queryPatientList(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());
                                user.setGenderByInt(snsUser.getSex());
                                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());
                                    user.setGenderByInt(snsUser.getSex());
                                }
                            }
                        }
                    }
                }
            }


            if (WeChatConfig.HAS_HTTPS_BY_BASE_URL) { // 强制为https
                String httpsURL = URLHelper.URLToHttps(state);
                state = httpsURL == null ? "" : httpsURL;
            }

            if (state.contains(".html")) { // 网页授权配置
                return state;
            } else {
                String baseUrl = WeChatConfig.getBaseURL();
                if (baseUrl != null && state.contains(baseUrl)) {
                    return state;
                }
            }
        } catch (Exception e) {
            ErrorHelper.println(e);
            log.error("[微信][获取重定向链接异常]{}", e.getMessage());
        }
        return null;
    }


    public static Result isAuth(HttpServletRequest request, HttpServletResponse response, boolean isPayOAuth) throws Exception {
        String token = request.getParameter("token"); // 前端缓存
        String state = request.getParameter("state");
        String isUserInfo = request.getParameter("isUserInfo");
        String UID = ParamHelper.filterParamNull(request.getParameter(UNION_ID_NAME), "");
        String deState = URLDecoder.decode(Base64Helper.decode(state), "UTF-8");

        String authSessionId = null;
        if (WeChatConfig.IS_ENABLE_GMC && WeChatConfig.IS_GMC_SERVER && !isPayOAuth) { // 开启医共体开关 & 是医共体主服务器 & 不是支付授权
            authSessionId = AesWxHelper.decode(request.getHeader(AUTH_SESSION_ID_NAME));
        }

        log.warn("[授权is_auth] token={}, state={}, isUserInfo={}, authSessionId={}, UID={}, deState={}", token, state, isUserInfo, authSessionId, UID, deState);
        if (WeChatConfig.IS_ENABLE_GMC && !WeChatConfig.IS_GMC_SERVER && !isPayOAuth) { // 开启医共体开关 & 不是医共体主服务器 & 不是支付授权
            try {  // 请求转发
                String serverDomain = WeChatConfig.getDomain(false, false);
                if (deState != null && serverDomain != null && !deState.contains(serverDomain)) {
                    return Result.error("授权域名不匹配");
                }

                HttpSession session = request.getSession();
                String sessionId = session.getId();

                log.info("[认证请求转发] [sessionId:{}]URL:[{}]", sessionId, WeChatConfig.getGMCAuthDomain(isHttpsWithProxy(request), true));
                String data = OkHttpHelper.postFormStr(WeChatConfig.getGMCAuthDomain(isHttpsWithProxy(request), true) + "wx_auth/is_auth", params -> {
                    params.put("token", token);
                    params.put("state", state);
                    params.put("isUserInfo", isUserInfo);
                    params.put(UNION_ID_NAME, UID);
                }, headers -> {
                    if (!ObjectUtils.isEmpty(sessionId)) {
                        headers.add(AUTH_SESSION_ID_NAME, AesWxHelper.encode(WeChatConfig.APP_ID + ":" + sessionId));
                    }
                });
                Result result = Result.dataToResult(data, true);
                System.out.println(JsonHelper.toJsonString(result));
                return Result.dataToResult(data, true);
            } catch (Exception e) {
                e.printStackTrace();
                return Result.error(e);
            }
        }

        boolean isFindUserInfo = ("true".equals(isUserInfo));

        AuthData authData = new AuthData();
        String cacheOpenid = authData.decodeToken(token, WeChatConfig.APP_ID);
        if (cacheOpenid != null) {
            log.info("[微信token认证] token={}, openid={}", token, cacheOpenid);
            User user = WxCacheHelper.getCacheUser(cacheOpenid);
            List<Patient> patients;
            if (user == null) {
                patients = new PatientService().queryPatientList(cacheOpenid, null, true);
                Cache<String, User> cache = WxCacheHelper.getUserCacheManager();
                User addCache = new User();
                addCache.setOpenid(cacheOpenid);
                addCache.setUnionId(authData.getUnionId());
                addCache.setAvatar(authData.getAvatar());
                addCache.setNickName(authData.getNickName());
                addCache.setPatientList(patients);
                cache.put(cacheOpenid, addCache);
            } else {
                patients = user.getPatientList();
            }

            Map<String, Object> map = new HashMap<>();
            map.put("openid", cacheOpenid);
            map.put("token", token);
            map.put("enOpenId", AesWxHelper.encode(cacheOpenid, true));
            map.put("enUnionId", AesWxHelper.encode(authData.getUnionId(), true));
            map.put("date", new Date());
            map.put("avatar", authData.getAvatar());
            map.put("nickName", authData.getNickName());
            map.put("patients", CodeHelper.get28UUID() + Base64Helper.encode(URLEncoder.encode(JsonHelper.toJsonString(patients), "UTF-8")));
            map.put("enParams", AesMicroHelper.encode(cacheOpenid));
            return Result.success(map);
        }

        HttpSession session = request.getSession();
        Object sessionOpenId = session.getAttribute("openid");
        String openid = sessionOpenId == null ? null : sessionOpenId.toString();

        log.info("[微信认证] openid={}, authSessionId={}", openid, authSessionId);
        if (!ObjectUtils.isEmpty(authSessionId) && ObjectUtils.isEmpty(openid)) {
            openid = WxCacheHelper.getOpenIdByAIDCache(authSessionId);
            log.warn("[微信AID认证]openid={}", openid);
        }

        if (openid != null) {
            log.info("[微信认证]openid={}", openid);
            User user = WxCacheHelper.getCacheUser(openid);
            if (user == null) {
                return Result.success(getAuthUrl(request, state, isFindUserInfo, UID, authSessionId));
            } else {
                if (ObjectUtils.isEmpty(openid)) {
                    openid = user.getOpenid(); // sessionId认证openid补充
                }
            }

            if (isFindUserInfo) { // 更换授权模式，需更新信息
                if (user.getNickName() == null || user.getAvatar() == null) {
                    return Result.success(getAuthUrl(request, state, true, UID, authSessionId));
                }
            }

            Map<String, Object> map = new HashMap<>();
            map.put("openid", openid);
            map.put("token", new AuthData().createToken(WeChatConfig.APP_ID, openid, user.getUnionId(), user.getAvatar(), user.getNickName()));
            map.put("enOpenId", AesWxHelper.encode(openid, true));
            map.put("enUnionId", AesWxHelper.encode(user.getUnionId(), true));
            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("enParams", AesMicroHelper.encode(openid));
            return Result.success(map);
        }

        return Result.success(getAuthUrl(request, state, isFindUserInfo, UID, authSessionId));
    }

    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, String state, boolean isFindUserInfo, String UID, String SID) {
//        StringBuffer url = request.getRequestURL();
//        String baseUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).append(request.getServletContext().getContextPath()).append("/").toString();
        if (state == null) {
            return null;
        }

        String api = isFindUserInfo ? "u_auth" : "b_auth";
        String scope = isFindUserInfo ? "snsapi_userinfo" : "snsapi_base";

        UID = toURLParam(UNION_ID_NAME, UID);
        String enSID = toURLParam(AUTH_SESSION_ID_NAME, AesWxHelper.encode(SID, true));

        String params = enSID + UID;
        try {
            params = ObjectUtils.isEmpty(params) ? "" : URLEncoder.encode(params, "UTF-8");
            log.warn("[认证链接参数] params={}", params);
        } catch (Exception e) {
            log.error(e.getMessage());
        }
        state = OAUTH_URL + WeChatConfig.getBaseURL(WeChatConfig.HAS_HTTPS_BY_BASE_URL || isHttpsWithProxy(request)) +
                "wx_auth/" + api +
                "?p=" + params +
                "&response_type=code" +
                "&scope=" + scope +
                "&forcePopup=true" +
                "&state=" + state + // state位置固定
                "#wechat_redirect";
        log.warn("[认证授权链接]state={}", state);
        return Base64Helper.encode(state);
    }


    // 是否为https请求
    public static boolean isHttpsWithProxy(HttpServletRequest request) {
        // 优先检查代理头（适用于反向代理场景）
        String forwardedProto = request.getHeader("X-Forwarded-Proto");
        if (forwardedProto != null) {
            return "https".equalsIgnoreCase(forwardedProto);
        }
        // 未经过代理，直接检查原生请求
        return request.isSecure();
    }

    public static String toURLParam(String key, String val) {
        if (ObjectUtils.isEmpty(val)) return "";
        return P_PREFIX + key + P_SUFFIX + val;
    }

    public static Map<String, String> getParamsMap(String params) {
        Map<String, String> paramsMap = new HashMap<>();
        try {
            if (ObjectUtils.isEmpty(params)) {
                return paramsMap;
            }
            params = URLDecoder.decode(params, "UTF-8");
            String[] paramsArr = params.split(P_PREFIX);
            String key, val;
            String[] keyValueArr;
            for (String paramItem : paramsArr) {
                if (paramItem.isEmpty()) {
                    continue;
                }
                keyValueArr = paramItem.split(P_SUFFIX, 2); // 分割成最多两部分
                if (keyValueArr.length == 2) {
                    key = keyValueArr[0];
                    val = keyValueArr[1];
                    val = ParamHelper.filterParamNull(val, null);
                    if (val != null) {
                        paramsMap.put(key, val);
                    }
                }
            }
        } catch (Exception e) {
            log.error(e.getMessage());
        }
        return paramsMap;
    }


    //    // 医共体开启 & 不是支付授权
//    private static boolean isAuthGMC(boolean isPayOAuth) {
//        return WeChatConfig.IS_ENABLE_GMC && !isPayOAuth;
//    }

//    private static String getOAuthURL(HttpServletRequest request, boolean isPayOAuth) {
//        boolean isHttps = WeChatConfig.HAS_HTTPS_BY_BASE_URL || isHttpsWithProxy(request);
//        return isAuthGMC(isPayOAuth)
//                ? "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + WeChatConfig.GMC_AUTH_APP_ID + "&redirect_uri=" + WeChatConfig.getGMCAuthDomain(isHttps, true)
//                : "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + WeChatConfig.APP_ID + "&redirect_uri=" + WeChatConfig.getBaseURL(isHttps);
//    }

//    private static SnsOath2AccessToken getOath2AccessToken(String code, boolean isPayOAuth) {
//        if (isAuthGMC(isPayOAuth)) {
//            return WxFactory.Base.OAuth().oauth2AccessToken(WeChatConfig.GMC_AUTH_APP_ID, WeChatConfig.GMC_AUTH_APP_SECRET, code);
//        }
//        return WxFactory.Base.OAuth().oauth2AccessToken(WeChatConfig.APP_ID, WeChatConfig.APP_SECRET, code);
//    }

//    // 获取重定向链接
//    private static String getAuthDomain(HttpServletRequest request, boolean isPayOAuth) {
//        if (isAuthGMC(isPayOAuth)) {
//            return WeChatConfig.getGMCAuthDomain(true, false); // 强制为https
//        }
//        return WeChatConfig.getDomain(WeChatConfig.HAS_HTTPS_BY_BASE_URL || isHttpsWithProxy(request)); // 配置中baseURL有"https"时优先级最高 ["@protocol=1"为https;"@protocol=0"为默认的http;]
//    }

}