package com.uas.sso.controller;

import com.alibaba.fastjson.JSON;
import com.uas.message.mail.service.MailService;
import com.uas.message.sms.service.SmsService;
import com.uas.sso.core.Const;
import com.uas.sso.core.PasswordStrength;
import com.uas.sso.entity.Setting;
import com.uas.sso.entity.Token;
import com.uas.sso.exception.VisibleError;
import com.uas.sso.service.SettingService;
import com.uas.sso.service.TokenService;
import com.uas.sso.util.StringUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.ModelMap;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * controller基础类
 *
 * @author yingp
 */
public class BaseController {

    protected static final String defultCharset = "UTF-8";

    @Autowired
    protected HttpServletRequest request;

    @Autowired
    protected HttpServletResponse response;

    @Autowired
    protected TokenService tokenService;

    @Autowired
    protected SmsService smsService;

    @Autowired
    protected MailService mailService;

    @Autowired
    protected SettingService settingService;

    protected static boolean isSuccess(ModelMap map) {
        return Boolean.TRUE.equals(map.get("success"));
    }

    protected static Object getContent(ModelMap map) {
        return map.get("content");
    }

    protected static ModelMap success() {
        return new ModelMap("success", true);
    }

    protected static ModelMap success(Object data) {
        return new ModelMap("success", true).addAttribute("content", data);
    }

    protected static ModelMap error(String errMsg) {
        return new ModelMap("error", true).addAttribute("errMsg", errMsg);
    }

    protected static ModelMap error(Object detail) {
        return new ModelMap("error", true).addAttribute("errDetail", detail);
    }

    protected static ModelMap error(String errCode, String errMsg) {
        return new ModelMap("error", true).addAttribute("errCode", errCode).addAttribute("errMsg", errMsg);
    }

    /**
     * 输出json格式
     *
     * @param obj
     * @throws IOException
     */
    protected void printJson(Object obj) throws IOException {
        response.addHeader("Content-Type", "application/json; charset=" + defultCharset);
        PrintWriter printWriter = response.getWriter();
        printWriter.append(JSON.toJSONString(obj));
        printWriter.flush();
        printWriter.close();
    }

    /**
     * 响应Ajax请求
     *
     * @param content 响应内容
     * @throws IOException
     */
    protected void printJsonP(String callback, Object content) throws IOException {
        if (!content.getClass().isAssignableFrom(String.class)) {
            content = JSON.toJSON(content);
        }
        response.setContentType("text/html;charset=" + defultCharset);
        PrintWriter out = response.getWriter();
        out.print(callback + "(" + content + ")");
        out.flush();
    }

    /**
     * 输出流
     *
     * @param fileName 文件名
     * @param bytes
     * @throws IOException
     */
    protected ResponseEntity<byte[]> outputStream(String fileName, byte[] bytes) {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        headers.setContentDispositionFormData("attachment", fileName);
        return new ResponseEntity<byte[]>(bytes, headers, HttpStatus.CREATED);
    }

    /**
     * 校验密码强度
     *
     * @param password 密码
     * @return PasswordStrength枚举
     * @throws VisibleError 用户可见异常
     */
    protected PasswordStrength checkPasswordLevel(String password) throws VisibleError {
        String strongRegex = "^(?=.{8,20})(((?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]))|((?=.*[0-9])((?=.*[a-zA-Z]))(?=.*[^a-zA-Z0-9]))).*$";
        String mediumRegex = "^(?=.{8,20})(((?=.*[0-9])(?=.*[a-z]))|((?=.*[0-9])(?=.*[A-Z]))).*$";
        if (password == null) {
            throw new VisibleError("密码不能为空");
        }
        if (password.matches(strongRegex)) {
            return PasswordStrength.STRONG;
        } else if (password.matches(mediumRegex)) {
            return PasswordStrength.MEDIUM;
        } else {
            return PasswordStrength.WEAK;
        }
    }

    /**
     * 获取验证码
     *
     * @param mobile 手机号
     * @param email 邮箱
     * @return tokenId
     */
    protected String getValidCode(String mobile, String email) {
        // 随机获得验证码
        String code = StringUtil.getRandomNumber(6);
        Token token = new Token(code, 10 * 60);
        System.out.println(code);

        // 设置绑定手机，防止获取验证码之后修改手机号
        token.setMobile(mobile);
        token.setEmail(email);

        // 将token存到Redis服务器上
        tokenService.save(token);

        // 将验证码发送到手机上
        ModelMap data = new ModelMap();
        data.put("checkcode", code);
        // 手机短信
        try {
            if (!StringUtils.isEmpty(mobile)) {
                Setting smsTplId = settingService.findOne("templateForSendSmsWhenRegister");
                if (!StringUtils.isEmpty(smsTplId)) {
                    smsService.send(smsTplId.getValue(), mobile, new Object[]{code});
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 邮件
        try {
            if (!StringUtils.isEmpty(email)) {
                Setting mailTplId = settingService.findOne("templateForSendEmailWhenRegister");
                if (!StringUtils.isEmpty(mailTplId)) {
                    mailService.send(mailTplId.getValue(), email, data);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 返回tokenId
        return token.getId();
    }

    /**
     * 获取手机号验证码
     *
     * @param mobile 手机号
     * @return tokenId
     */
    protected String getMobileCode(String mobile) {
        return getValidCode(mobile, null);
    }

    /**
     * 获取邮箱验证码
     *
     * @param email 邮箱
     * @return
     */
    protected String getEmailCode(String email) {
        return getValidCode(null, email);
    }

    /**
     * 校验验证码
     *
     * @param token  验证码tokenID
     * @param mobile 手机号
     * @param email 邮箱
     * @param code   验证码
     * @return
     * @throws VisibleError 校验失败则抛异常
     *                      当参数异常，token过期或者token绑定的手机号不对时抛出此异常
     */
    protected void checkValidCode(String token, String mobile, String email, String code) {
        // 校验参数
        if (StringUtils.isEmpty(token) || StringUtils.isEmpty(code)) {
            throw new VisibleError("参数错误");
        }
        Token existToken = tokenService.findOne(token);
        if (existToken == null || existToken.isExpired()) {
            throw new VisibleError("验证码已经失效，请重新获取");
        }
        if (!StringUtils.isEmpty(existToken.getMobile()) && !existToken.getMobile().equals(mobile)) {
            throw new VisibleError("手机号被修改，请重新获取验证码");
        }
        if (!StringUtils.isEmpty(existToken.getEmail()) && !existToken.getEmail().equals(email)) {
            throw new VisibleError("手机号被修改，请重新获取验证码");
        }

        // 校验验证码
        String existCode = existToken.getBind().toString();
        if (!code.equals(existCode)) {
            throw new VisibleError("验证码错误");
        }
    }

    /**
     * 校验手机号验证码
     *
     * @param token  验证码tokenID
     * @param mobile 手机号
     * @param code   验证码
     */
    protected void checkMobileCode(String token, String mobile, String code) {
        checkValidCode(token, mobile, null, code);
    }

    /**
     * 校验手机号验证码
     *
     * @param token  验证码tokenID
     * @param email 邮箱
     * @param code   验证码
     */
    protected void checkEmailCode(String token, String email, String code) {
        checkValidCode(token, null, email, code);
    }

    /**
     * 校验手机号格式
     *
     * @param mobile     手机号
     * @param mobileArea 手机号所属区域
     */
    protected void checkMobile(String mobile, String mobileArea) {
        // 由于现在不考虑手机号所属区域，默认为中国大陆
        mobileArea = mobileArea == null ? Const.CONTINENT : mobileArea;

        // 校验手机号
        if (Const.CONTINENT.equals(mobileArea)) {
            if (!mobile.matches(Const.REGEXP_MOBILE_CONTINENT)) {
                throw new VisibleError("请输入正确的手机号格式");
            }
        } else if (Const.HONGKONG.equals(mobileArea)) {
            if (!mobile.matches(Const.REGEXP_MOBILE_HONGKONG)) {
                throw new VisibleError("请输入正确的手机号格式");
            }
        } else {
            throw new VisibleError("未找到所选地区");
        }
    }
}