package com.poyee.util;

import com.alibaba.fastjson.JSONObject;
import com.poyee.base.dto.AppBaseUser;
import com.poyee.base.dto.UserInfo;
import com.poyee.common.enums.I18nFormat;
import com.poyee.common.exception.AuthException;
import com.poyee.i18n.I18nLanguage;
import com.poyee.i18n.I18nUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.*;

import static com.poyee.i18n.I18nLanguage.EN;
import static com.poyee.i18n.I18nLanguage.ZH_CN;
import static com.poyee.i18n.I18nMessageEnums.GET_USER_INFO_ERROR;

/**
 * 客户端工具类
 *
 * @author zheng
 */
@Slf4j
public class ServletUtils {
    /**
     * 定义移动端请求的所有可能类型
     */
    private final static String[] agent = {"Android", "iPhone", "iPod", "iPad", "Windows Phone", "MQQBrowser"};

    /**
     * 获取String参数
     */
    public static String getParameter(String name) {
        return getRequest().getParameter(name);
    }

    /**
     * 获取String参数
     */
    public static String getParameter(String name, String defaultValue) {
        return Convert.toStr(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name) {
        return Convert.toInt(getRequest().getParameter(name));
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name, Integer defaultValue) {
        return Convert.toInt(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取request
     */
    public static HttpServletRequest getRequest() {
        return getRequestAttributes().getRequest();
    }

    /**
     * 获取response
     */
    public static HttpServletResponse getResponse() {
        return getRequestAttributes().getResponse();
    }

    /**
     * 获取session
     */
    public static HttpSession getSession() {
        return getRequest().getSession();
    }
    /**
     * 获取session
     */
    public static HttpSession getSession(boolean b) {
        return getRequest().getSession(b);
    }

    /**
     * @return
     */
    public static ServletRequestAttributes getRequestAttributes() {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        return (ServletRequestAttributes) attributes;
    }

    /**
     * 将字符串渲染到客户端
     *
     * @param response 渲染对象
     * @param string   待渲染的字符串
     * @return null
     */
    public static String renderString(HttpServletResponse response, String string) {
        try {
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 是否是Ajax异步请求
     *
     * @param request
     */
    public static boolean isAjaxRequest(HttpServletRequest request) {
        String accept = request.getHeader("accept");
        if (accept != null && accept.indexOf("application/json") != -1) {
            return true;
        }

        String xRequestedWith = request.getHeader("X-Requested-With");
        if (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1) {
            return true;
        }

        String uri = request.getRequestURI();
        if (ObjectUtil.inStringIgnoreCase(uri, ".json", ".xml")) {
            return true;
        }

        String ajax = request.getParameter("__ajax");
        return ObjectUtil.inStringIgnoreCase(ajax, "json", "xml");
    }

    /**
     * 判断User-Agent 是不是来自于手机
     */
    public static boolean checkAgentIsMobile(String ua) {
        boolean flag = false;
        if (!ua.contains("Windows NT") || (ua.contains("Windows NT") && ua.contains("compatible; MSIE 9.0;"))) {
            // 排除 苹果桌面系统
            if (!ua.contains("Windows NT") && !ua.contains("Macintosh")) {
                for (String item : agent) {
                    if (ua.contains(item)) {
                        flag = true;
                        break;
                    }
                }
            }
        }
        return flag;
    }

    /**
     * @return
     */
    public static String getIpAddress() {
        HttpServletRequest request = getRequest();
        String ip;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            ip = "未知IP";
        }
        return ip;
    }

    /**
     * 设置用户信息
     * @param userInfo
     */
    public static void setUserInfo(UserInfo userInfo){
        try {
            getSession().setAttribute("userInfo", JSONObject.toJSONString(userInfo));
            log.info(" 设置用户信息：{} ", userInfo);
        } catch (Exception e) {
            log.error(" 设置用户信息异常：{} ", e.getMessage());
            throw new AuthException(I18nUtils.get(GET_USER_INFO_ERROR));
        }
    }

    /**
     * @return
     */
    public static UserInfo getUserInfo() {
        UserInfo userInfo = new UserInfo();
        try {
            String userInfoObj = (String) getSession().getAttribute("userInfo");
            userInfo = JSONObject.parseObject(userInfoObj, UserInfo.class);
            JSONObject jsonObject = JSONObject.parseObject(userInfoObj);
            String id = jsonObject.getString("id");
            if(StringUtils.isBlank(id)){
                 id = jsonObject.getString("userId");
                 if(StringUtils.isNotBlank(id) && Objects.equals(id, "null")){
                     id = null;
                     userInfo.setUserId(id);
                 }
            }
            userInfo.setId(Objects.isNull(id)?null:Integer.parseInt(id));
            log.info(" userInfo>>>{} ", userInfo);
        } catch (Exception e) {
            log.error(" 获取用户信息异常：", e);
            throw new AuthException(I18nUtils.get(GET_USER_INFO_ERROR));
        }
        return userInfo;
    }

    /**
     * @return
     */
    public static AppBaseUser getAppUserInfo() {
        AppBaseUser userInfo = new AppBaseUser();
        try {
            String userInfoObj = (String) getSession().getAttribute("appBaseUser");
            userInfo = JSONObject.parseObject(userInfoObj, AppBaseUser.class);
            JSONObject jsonObject = JSONObject.parseObject(userInfoObj);
            String id = jsonObject.getString("id");
            userInfo.setId(Integer.parseInt(id));
            log.info(" AppBaseUser>>>{} ", userInfo);
        } catch (Exception e) {
            log.error(" 获取用户信息异常：{} ", e.getMessage());
            throw new AuthException(I18nUtils.get(GET_USER_INFO_ERROR));
        }
        return userInfo;
    }

    /**
     * 获取XuserBase64
     * @return
     */
    public static String getXuserBase64(){
        return (String) getSession().getAttribute("x-user-base64");
    }

    /**
     * @return
     */
    public static UserInfo getGeneralUser() {
        UserInfo userInfo = new UserInfo();
        try {
            String userInfoObj = (String) getSession().getAttribute("userInfo");
            userInfo = JSONObject.parseObject(userInfoObj, UserInfo.class);
            log.info(" userInfo>>>{} ", userInfo);
            if ("general_user".equals(userInfo.getRoleCode())) {
                return userInfo;
            }
        } catch (Exception e) {
            throw new AuthException(I18nUtils.get(GET_USER_INFO_ERROR));
        }
        return null;
    }

    /**
     *
     * @return
     */
    public static I18nLanguage getLanguage() {
        String language = (String) getSession().getAttribute("language");
        if (StringUtils.isBlank(language)) {
            if(isI18n()){//国际版默认英文
                language =  EN.getCode();
            }else{//国内版默认中文
                language = ZH_CN.getCode();
            }
        }
        return I18nLanguage.getByCode(language);
    }

    /**
     * 判断是否国际版
     */
    public static boolean isI18n() {
        String language = (String) getSession().getAttribute("language");
        return StringUtils.isNotBlank(language);
    }

    /**
     * 判断接口是否支持国际版
     */
    public static boolean isI18nSupport() {
        try {
            return (boolean) Optional.ofNullable(getSession().getAttribute("i18n")).orElse(false);
        }catch (Exception e){
            return false;
        }
    }

    /**
     * 检查国际化格式是否支持
     *
     * @param formats 请求的国际化格式数组
     * @return 如果支持任意一种格式，返回 true；否则返回 false
     */
    public static boolean checkI18nFormat(I18nFormat[] formats) {
        if (formats == null || formats.length == 0) {
            return false;
        }

        I18nFormat[] supportedFormats = (I18nFormat[]) getSession().getAttribute("i18nFormat");
        if (supportedFormats == null || supportedFormats.length == 0) {
            log.warn("未配置支持的国际化格式");
            return false;
        }

        // 使用 Set 提高查找效率
        Set<I18nFormat> supportedSet = new HashSet<>(Arrays.asList(supportedFormats));
        for (I18nFormat format : formats) {
            if (supportedSet.contains(format)) {
                return true;
            }
        }

        log.warn("不支持的国际化格式: {}", Arrays.toString(formats));
        return false;
    }

}