package com.starry.common.utils;

import cn.hutool.core.convert.Convert;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**
 * 客户端工具类
 *
 * @author ruoyi
 */
public class ServletUtils {
    /**
     * 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Boolean参数
     */
    public static Boolean getParameterToBool(String name) {
        return Convert.toBool(getRequest().getParameter(name));
    }

    /**
     * 获取Boolean参数
     */
    public static Boolean getParameterToBool(String name, Boolean defaultValue) {
        return Convert.toBool(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();
    }

    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
     */
    public static void renderString(HttpServletResponse response, String string) {
        try {
            response.setStatus(200);
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
        } catch (IOException e) {

        }
    }

    /**
     * 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.contains("application/json")) { return true; }
     *
     * String xRequestedWith = request.getHeader("X-Requested-With"); if
     * (xRequestedWith != null && xRequestedWith.contains("XMLHttpRequest")) {
     * return true; }
     *
     * String uri = request.getRequestURI(); if (StringUtils.inStringIgnoreCase(uri,
     * ".json", ".xml")) { return true; }
     *
     * String ajax = request.getParameter("__ajax"); return
     * StringUtils.inStringIgnoreCase(ajax, "json", "xml"); }
     */

    /**
     * 内容编码
     *
     * @param str
     *            内容
     * @return 编码后的内容
     */
    public static String urlEncode(String str) {
        try {
            return URLEncoder.encode(str, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            return StringUtils.EMPTY;
        }
    }

    /**
     * 内容解码
     *
     * @param str
     *            内容
     * @return 解码后的内容
     */
    public static String urlDecode(String str) {
        try {
            return URLDecoder.decode(str, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            return StringUtils.EMPTY;
        }
    }
}