package com.finance.common.utils;


import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;


/**
 * web工具类
 *
 * @author liheng
 */
public final class WebUtils extends org.springframework.web.util.WebUtils {

    /**
     * 当前请求
     */
    public static HttpServletRequest request() {
        return contextHolder() == null ? null : contextHolder().getRequest();
    }

    /**
     * 当前响应
     */
    public static HttpServletResponse response() {
        return contextHolder() == null ? null : contextHolder().getResponse();
    }

    /**
     * 当前session
     */
    public static HttpSession session() {
        return request() == null ? null : request().getSession();
    }

    /**
     * 当前ServletRequest
     */
    public static ServletRequestAttributes contextHolder() {
        return (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    }

    /**
     * 判断请求是否为 AJAX
     *
     * @param request 当前请求
     */
    public static boolean isAjax(HttpServletRequest request) {
        return "XMLHttpRequest".equals(request.getHeader("X-Requested-With"));
    }

    /**
     * 获取操作系统,浏览器及浏览器版本信息
     *
     * @param request
     * @return
     */
    public static Map<String, String> getOsAndBrowserInfo(HttpServletRequest request) {
        Map<String, String> map = new HashMap<>(2);
        String browserDetails = request.getHeader("User-Agent");
        String userAgent = browserDetails;
        String user = userAgent.toLowerCase();

        String os = "";
        String browser = "";
        //=================OS Info=======================
        if (userAgent.toLowerCase().contains("windows")) {
            os = "Windows";
        } else if (userAgent.toLowerCase().contains("mac")) {
            os = "Mac";
        } else if (userAgent.toLowerCase().contains("x11")) {
            os = "Unix";
        } else if (userAgent.toLowerCase().contains("android")) {
            os = "Android";
        } else if (userAgent.toLowerCase().contains("iphone")) {
            os = "IPhone";
        } else {
            os = "UnKnown, More-Info: " + userAgent;
        }
        //===============Browser===========================
        if (user.contains("edge")) {
            browser = (userAgent.substring(userAgent.indexOf("Edge")).split(" ")[0]).replace("/", "-");
        } else if (user.contains("msie")) {
            String substring = userAgent.substring(userAgent.indexOf("MSIE")).split(";")[0];
            browser = substring.split(" ")[0].replace("MSIE", "IE") + "-" + substring.split(" ")[1];
        } else if (user.contains("safari") && user.contains("version")) {
            browser = (userAgent.substring(userAgent.indexOf("Safari")).split(" ")[0]).split("/")[0]
                    + "-" + (userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1];
        } else if (user.contains("opr") || user.contains("opera")) {
            if (user.contains("opera")) {
                browser = (userAgent.substring(userAgent.indexOf("Opera")).split(" ")[0]).split("/")[0]
                        + "-" + (userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1];
            } else if (user.contains("opr")) {
                browser = ((userAgent.substring(userAgent.indexOf("OPR")).split(" ")[0]).replace("/", "-"))
                        .replace("OPR", "Opera");
            }
        } else if (user.contains("chrome")) {
            browser = (userAgent.substring(userAgent.indexOf("Chrome")).split(" ")[0]).replace("/", "-");
        } else if ((user.contains("mozilla/7.0")) || (user.contains("netscape6")) ||
                (user.contains("mozilla/4.7")) || (user.contains("mozilla/4.78")) ||
                (user.contains("mozilla/4.08")) || (user.contains("mozilla/3"))) {
            browser = "Netscape-?";
        } else if (user.contains("firefox")) {
            browser = (userAgent.substring(userAgent.indexOf("Firefox")).split(" ")[0]).replace("/", "-");
        } else if (user.contains("rv")) {
            String IEVersion = (userAgent.substring(userAgent.indexOf("rv")).split(" ")[0]).replace("rv:", "-");
            browser = "IE" + IEVersion.substring(0, IEVersion.length() - 1);
        } else {
            browser = "UnKnown, More-Info: " + userAgent;
        }
        map.put("os", os);
        map.put("browser", browser);
        return map;
    }

    /**
     * 读取cookie
     *
     * @param name cookie name
     * @return cookie value
     */
    public String getCookieVal(String name) {
        return getCookieVal(request(), name);
    }

    /**
     * 读取cookie
     *
     * @param request HttpServletRequest
     * @param name    cookie name
     * @return cookie value
     */
    public String getCookieVal(HttpServletRequest request, String name) {
        Cookie cookie = getCookie(request, name);
        return cookie != null ? cookie.getValue() : null;
    }

    /**
     * 清除 某个指定的cookie
     *
     * @param response HttpServletResponse
     * @param key      cookie key
     */
    public void removeCookie(HttpServletResponse response, String key) {
        setCookie(response, key, null, 0);
    }

    /**
     * 设置cookie
     *
     * @param response        HttpServletResponse
     * @param name            cookie name
     * @param value           cookie value
     * @param maxAgeInSeconds maxage
     */
    public void setCookie(HttpServletResponse response, String name, String value, int maxAgeInSeconds) {
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        cookie.setMaxAge(maxAgeInSeconds);
        //cookie.setHttpOnly(true);
        response.addCookie(cookie);
    }
}