// Copyright 2020 github.com. All rights reserved.
// Use of this source code is governed by github.com.

package middleware

import (
	"git.getensh.com/common/gopkgs/jwtwrapper"
	"github.com/dgrijalva/jwt-go"
	"github.com/gin-gonic/gin"
	"github.com/tidwall/gjson"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"net/http"
	"property-system-gateway/errors"
	"property-system-gateway/utils"
	"strconv"
	"strings"
)

// 响应数据
type Response struct {
	Code    codes.Code `json:"code" default:"1"`
	Message string     `json:"message" default:"success"`
}

// JWT is jwt middleware
func Jwt() gin.HandlerFunc {
	return func(c *gin.Context) {
		//fmt.Printf("xxx:%v,%v\n", c.Request.RequestURI, c.Request.Method)
		s := status.New(1, "内部服务错误")
		token := c.GetHeader("token")
		if token == "" {
			if v, ok := status.FromError(errors.NoTokenError); ok {
				s = v
			}
			c.JSON(http.StatusOK, Response{s.Code(), s.Message()})
			c.Abort()
			return
		}

		// 解析token
		claims, err := jwtwrapper.ParseToken(token)
		if err != nil {
			switch err.(*jwt.ValidationError).Errors {
			case jwt.ValidationErrorExpired:
				if v, ok := status.FromError(errors.TokenExpiredError); ok {
					s = v
				}
			default:
				if v, ok := status.FromError(errors.TokenFailedError); ok {
					s = v
				}
			}

			c.JSON(http.StatusOK, Response{s.Code(), s.Message()})
			c.Abort()
			return
		}

		// 将claims信息保存到上下文，为后续使用
		c.Set("claims", claims)
		gardenId := gjson.GetBytes([]byte(claims.Subject), "garden_id").Int()
		uid, _ := strconv.ParseInt(claims.Id, 10, 64)
		cid := gjson.GetBytes([]byte(claims.Subject), "cid").Int()

		/*
			supper := gjson.GetBytes(utils.StrToBytes(claims.Subject), "supper").Bool()
			if c.Request.Method == "PUT" || c.Request.Method == "POST" || c.Request.Method == "DELETE" {
				if supper == false && strings.Contains(c.Request.RequestURI, "/user") == false {
					c.JSON(http.StatusOK, Response{10008, "权限不足"})
				}
			}
		*/
		isCompanyEnter := gjson.GetBytes([]byte(claims.Subject), "is_company_enter").Bool()

		if isCompanyEnter && !strings.Contains(c.Request.RequestURI, "user/company_login") {
			c.JSON(http.StatusOK, Response{10010, "token错误"})
			c.Abort()
			return
		}
		if isCompanyEnter && strings.Contains(c.Request.RequestURI, "user/company_login") {
			c.Next()
			return
		}

		if uid == 0 && !strings.Contains(c.Request.RequestURI, "user/choose_user") {
			c.JSON(http.StatusOK, Response{10008, "请先选择账户"})
			c.Abort()
			return
		}

		gPermissionTime := gjson.GetBytes([]byte(claims.Subject), "g_permission_time").String()
		uPermissionTime := gjson.GetBytes([]byte(claims.Subject), "u_permission_time").String()
		byCompany := gjson.GetBytes([]byte(claims.Subject), "by_company").Bool()
		// 权限变更触发重新登录
		if gardenId > 0 && gPermissionTime != gloablePermissionTime(gardenId) {
			if strings.Contains(c.Request.RequestURI, "permission_reget") {
				c.Next()
				return
			}
			c.JSON(http.StatusOK, Response{19999, "权限已变更重新获取权限"})
			c.Abort()
			return
		}
		if !byCompany && uPermissionTime != userPermissionTime(uid) {
			if strings.Contains(c.Request.RequestURI, "permission_reget") {
				c.Next()
				return
			}
			c.JSON(http.StatusOK, Response{19999, "权限已变更重新获取权限"})
			c.Abort()
			return
		}
		// 单点登录检查
		if false {
			singleSignTime := gjson.GetBytes([]byte(claims.Subject), "single_sign_time").String()
			if singleSignTime != utils.GetSingleSignTime(utils.GetSingleFlag(byCompany, cid, gardenId, uid)) &&
				!strings.Contains(c.Request.RequestURI, "user/choose_user") &&
				!strings.Contains(c.Request.RequestURI, "user/company_login") {
				c.JSON(http.StatusOK, Response{10008, "账号已在其他地方登录"})
				c.Abort()
				return
			}
		}

		// 权限检查 TODO  目前暂时放开，后续需检查权限
		super := gjson.GetBytes([]byte(claims.Subject), "is_super_group").Bool()

		if super {
			//c.Next()
			//return
		}

		if byCompany {
			//c.Next()
			//return
		}
		if c.Request.Method == "GET" {
			c.Next()
			return
		}
		if strings.Contains(c.Request.RequestURI, "openim") {
			c.Next()
			return
		}
		routers := gjson.GetBytes([]byte(claims.Subject), "routers").Map()

		err = checkPermission(routers, c.Request.RequestURI, uid, gPermissionTime, uPermissionTime)
		if err != nil {
			if v, ok := status.FromError(err); ok {
				s = v
			}
			c.JSON(http.StatusOK, Response{s.Code(), s.Message()})
			c.Abort()
			return
		}
		c.Next()
	}
}