package Handler

import (
	"bufio"
	"dsSdsf/Utils/CommonUtil"
	"dsSdsf/Utils/RedisUtil"
	"fmt"
	"github.com/gin-gonic/gin"
	"io"
	"net/http"
	"os"
	"strings"
)

var WhiteArray []string

// 初始化白名单
func init() {
	configIniFile := "./Config/White.txt"
	if !CommonUtil.Exists(configIniFile) {
		configIniFile = "/usr/local/dsMin/dsBaseWeb/Config/White.txt"
	}
	f, err := os.Open(configIniFile)
	if err != nil {
		fmt.Println("没有找到白名单文件！")
	}
	buf := bufio.NewReader(f)
	for {
		line, err := buf.ReadString('\n')
		line = strings.TrimSpace(line)
		if strings.Index(line, "#") < 0 && len(line) > 0 {
			WhiteArray = append(WhiteArray, line)
		}
		if err != nil || io.EOF == err {
			break
		}
	}
}

func LoginHandler() gin.HandlerFunc {
	return func(c *gin.Context) {
		requestUri := c.Request.RequestURI

		//白名单中的放行
		for i := 0; i < len(WhiteArray); i++ {
			if strings.Index(requestUri, WhiteArray[i]) >= 0 {
				//放行~
				c.Next()
				return
			}
		}

		//是否需要登录，默认为true需要登录
		needLoginFlag := true
		//获取cookie中的token
		cookieToken, _ := c.Request.Cookie("token")

		if cookieToken != nil {
			_, error := RedisUtil.GET(cookieToken.Value)
			if error == nil {
				needLoginFlag = false
			}
		}

		if needLoginFlag {
			//跳转到登录页面
			c.Redirect(http.StatusMovedPermanently, "/sdsf/login/doLogin?redirect_uri="+requestUri)
		} else {
			//将redis中的token有效期重置
			RedisUtil.EXPIRE(cookieToken.Value, 1800)
			c.Next()
			return
		}
	}
}