package CheckHandler

import (
	"github.com/bluesky335/IDCheck/IdNumber"
	"github.com/gin-gonic/gin"
	"strings"
)

//在注释标签中声明的标识字符串：X-IdCardLimit
var idcardLimit = "x-idcardlimit"

//形成一个map,用于O(1)速度获取到一个接口是不是需要进行判断拦截，注意，一个接口可以存在post+get两种形式，所以map里面是一个数组，需要遍历
type idcardLimitStruct struct {
	parameterName string
	httpType      string
	must          bool
}

//长度限制的map,以string为key(key的命名是接口名+"_get" 或者 接口名+"_post"),里面是idcardLimitStruct形式的数组
var idcardLimitMap = make(map[string][]idcardLimitStruct)

/**
功能：功能函数，添当前的检查字典里
*/
func idcardAddToMap(d map[string]interface{}, t map[string]interface{}, k string, httpType string) {
	var idcardLimitArray []idcardLimitStruct
	d = t[httpType].(map[string]interface{})
	if d != nil && d[idcardLimit] != nil {
		for _, value := range d[idcardLimit].([]interface{}) {
			var t idcardLimitStruct
			t.parameterName = value.(string)
			t.httpType = httpType
			//此参数是否为必填写项
			for _, v2 := range d["parameters"].([]interface{}) {
				c2 := v2.(map[string]interface{})
				for k2, v2 := range c2 {
					if k2 == "required" {
						t.must = v2.(bool) //标识是否是必须项
					}
				}
			}
			idcardLimitArray = append(idcardLimitArray, t)
		}
		idcardLimitMap[k+"_"+httpType] = idcardLimitArray
	}
}

/**
功能：初始化身份证限制字典
*/
func idcardLimitInit(inter interface{}) map[string][]idcardLimitStruct {
	//参数检查器
	m := inter.(map[string]interface{})
	n := m["paths"].(map[string]interface{})
	for k, v := range n {
		t := v.(map[string]interface{})
		//参数长度检查器
		var d map[string]interface{}
		if t["get"] != nil {
			idcardAddToMap(d, t, k, "get")
		}
		if t["post"] != nil {
			idcardAddToMap(d, t, k, "post")
		}
	}
	return idcardLimitMap
}

/**
功能：检查字符串是否是合法身份证号
作者：黄海
时间：2020-03-17
*/
func idcardLimitIsLegal(c *gin.Context, interName string) (bool, ResultStruct) {
	var resultStruct ResultStruct
	//接口传入的请求方式:get?post?
	codeHttpType := strings.ToLower(c.Request.Method)
	//1、如果此接口地址需要进行参数长度检查
	if emailLimitMap[interName+"_"+codeHttpType] != nil {
		arr := idcardLimitMap[interName+"_"+codeHttpType]
		resultStruct.InterfaceName = interName
		//遍历arr
		for i := 0; i < len(arr); i++ {
			parameterName := arr[i].parameterName
			httpType := arr[i].httpType
			var p string
			if httpType == "get" {
				p = c.Query(parameterName)
			} else {
				p = c.PostForm(parameterName)
			}
			resultStruct.Parameter = parameterName
			//为空，不需要检查，通过
			if p == "" && !arr[i].must {
				return true, resultStruct
			}
			//为空，需要检查，禁止
			if p == "" && arr[i].must{
				resultStruct.Message = "参数没有找到!"
				return false, resultStruct
			}
			var id = IdNumber.New(p)
			if !id.IsValid() {
				resultStruct.HttpType = httpType
				resultStruct.Message = "不是合法身份证号！"
				return false, resultStruct
			}
		}
	}
	return true, resultStruct
}