package logic

import (
	"context"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"github.com/go-ldap/ldap/v3"
	"log"
	"sort"
	"strings"

	"fusenapi/server/ldap-admin/internal/svc"
	"fusenapi/server/ldap-admin/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type GetDepartmentsLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewGetDepartmentsLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetDepartmentsLogic {
	return &GetDepartmentsLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *GetDepartmentsLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }
type mapDnItem struct {
	Attribute map[string]interface{} `json:"attribute"`
	DN        string                 `json:"dn"`
	Sort      int                    `json:"sort"`
	Child     []*mapDnItem           `json:"child"`
}

func (l *GetDepartmentsLogic) GetDepartments(req *types.Request, userinfo *auth.UserInfo) (resp *basic.Response) {
	// todo 从ldap获取组织架构数据
	searchBase := "dc=fusen,dc=com"
	// 创建搜索请求
	searchRequest := ldap.NewSearchRequest(
		searchBase,
		ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
		"(objectClass=*)",
		[]string{ /*"cn", "sn", "givenName", "mail", "telephoneNumber", "department", "title"*/ },
		nil,
	)
	// 执行搜索请求
	searchResult, err := l.svcCtx.Ldap.Search(searchRequest)
	if err != nil {
		log.Fatal(err)
	}
	mapDN := make(map[string]*mapDnItem)
	sortNum := 0
	for _, v := range searchResult.Entries {
		sortNum++
		attribute := make(map[string]interface{})
		for _, attr := range v.Attributes {
			if attr.Name == "objectClass" {
				mapObjectClass := make(map[string]struct{})
				for _, objectClassItem := range attr.Values {
					mapObjectClass[objectClassItem] = struct{}{}
				}
				attribute[attr.Name] = mapObjectClass
			} else {
				attribute[attr.Name] = strings.Join(attr.Values, ",")
			}
		}
		mapDN[v.DN] = &mapDnItem{
			DN:        v.DN,
			Attribute: attribute,
			Sort:      sortNum,
			Child:     make([]*mapDnItem, 0, 100),
		}
	}
	//组织层级关系
	minLevel := 0
	for dn, v := range mapDN {
		sl := strings.Split(dn, ",")
		lensl := len(sl)
		if lensl < minLevel || minLevel == 0 {
			minLevel = lensl
		}
		//没有父级
		if lensl <= 1 {
			continue
		}
		//有父级
		parentKey := strings.Join(sl[1:], ",")
		if parent, ok := mapDN[parentKey]; ok {
			parent.Child = append(parent.Child, v)
			//排序
			sort.Slice(parent.Child, func(i, j int) bool {
				return parent.Child[i].Sort < parent.Child[j].Sort
			})
		}
	}
	//只获取最顶层
	list := make([]interface{}, 0, len(mapDN))
	for dn, v := range mapDN {
		sl := strings.Split(dn, ",")
		if len(sl) == minLevel {
			list = append(list, v)
		}
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "", list)
}

/*
dn: dc=fusen,dc=com
o : [fusen com]
dc : [fusen]
objectClass : [top dcObject organization]

dn: cn=root,dc=fusen,dc=com
cn : [root]
objectClass : [organizationalRole]
description : [Directory Manager]

dn: ou=People,dc=fusen,dc=com
ou : [People]
objectClass : [top organizationalUnit]
telephoneNumber : [aabb]

dn: ou=Group,dc=fusen,dc=com
ou : [Group]
objectClass : [top organizationalUnit]
dn: uid=fsuser,ou=People,dc=fusen,dc=com
uid : [fsuser]
cn : [fsuser]
sn : [fsuser]
mail : [fsuser@fusen.com]
objectClass : [person organizationalPerson inetOrgPerson posixAccount top shadowAccount]
userPassword : [{crypt}$6$fpyhuX7q$XBAA2URfWZCYZRLQpzzqucuFymrYvJL/NXztQ6/ug89GHvfN.OCUOGOZzyoKZwgF/LXToY5Wmqf9Yb0JoQbkL1]
shadowLastChange : [19674]
shadowMin : [0]
shadowMax : [99999]
shadowWarning : [7]
loginShell : [/bin/bash]
uidNumber : [1000]
gidNumber : [1000]
homeDirectory : [/home/fsuser]

dn: uid=fstest,ou=People,dc=fusen,dc=com
uid : [fstest]
cn : [fstest]
sn : [fstest]
mail : [fstest@fusen.com]
objectClass : [person organizationalPerson inetOrgPerson posixAccount top shadowAccount]
userPassword : [{crypt}$6$SYX2T3.y$OvYYU08PG8g.4SvI3A4MHSzfK5qSZeqB/2StqXxtd0E/RAENXFXBQH4bvkjLsbcDQMMobkzoyRyVJZv5xcK3r0]
shadowLastChange : [19674]
shadowMin : [0]
shadowMax : [99999]
shadowWarning : [7]
loginShell : [/bin/bash]
uidNumber : [1001]
gidNumber : [1001]
homeDirectory : [/home/fstest]
mobile : [17557283677]

dn: cn=fusen,ou=Group,dc=fusen,dc=com
objectClass : [posixGroup top]
cn : [fusen]
userPassword : [{crypt}x]
gidNumber : [1000]

dn: cn=fusen2,ou=Group,dc=fusen,dc=com
objectClass : [posixGroup top]
cn : [fusen2]
userPassword : [{crypt}x]
gidNumber : [1001]

dn: cn=gitlab,ou=Group,dc=fusen,dc=com
objectClass : [top groupOfNames]
cn : [gitlab]
member : [uid=testuser,ou=People,dc=funsen,dc=com]
*/