// Copyright 2021 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package object

import (
	"fmt"

	"github.com/casbin/casdoor/util"
	"xorm.io/core"
)

type User struct {
	Owner       string `xorm:"varchar(100) notnull pk" json:"owner"`
	Name        string `xorm:"varchar(100) notnull pk" json:"name"`
	CreatedTime string `xorm:"varchar(100)" json:"createdTime"`
	UpdatedTime string `xorm:"varchar(100)" json:"updatedTime"`

	Id                string   `xorm:"varchar(100)" json:"id"`
	Type              string   `xorm:"varchar(100)" json:"type"`
	Password          string   `xorm:"varchar(100)" json:"password"`
	PasswordSalt      string   `xorm:"varchar(100)" json:"passwordSalt"`
	DisplayName       string   `xorm:"varchar(100)" json:"displayName"`
	Avatar            string   `xorm:"varchar(255)" json:"avatar"`
	PermanentAvatar   string   `xorm:"varchar(255)" json:"permanentAvatar"`
	Email             string   `xorm:"varchar(100)" json:"email"`
	Phone             string   `xorm:"varchar(100)" json:"phone"`
	Location          string   `xorm:"varchar(100)" json:"location"`
	Address           []string `json:"address"`
	Affiliation       string   `xorm:"varchar(100)" json:"affiliation"`
	Title             string   `xorm:"varchar(100)" json:"title"`
	Homepage          string   `xorm:"varchar(100)" json:"homepage"`
	Bio               string   `xorm:"varchar(100)" json:"bio"`
	Tag               string   `xorm:"varchar(100)" json:"tag"`
	Region            string   `xorm:"varchar(100)" json:"region"`
	Language          string   `xorm:"varchar(100)" json:"language"`
	Score             int      `json:"score"`
	Ranking           int      `json:"ranking"`
	IsOnline          bool     `json:"isOnline"`
	IsAdmin           bool     `json:"isAdmin"`
	IsGlobalAdmin     bool     `json:"isGlobalAdmin"`
	IsForbidden       bool     `json:"isForbidden"`
	SignupApplication string   `xorm:"varchar(100)" json:"signupApplication"`
	Hash              string   `xorm:"varchar(100)" json:"hash"`
	PreHash           string   `xorm:"varchar(100)" json:"preHash"`

	Github   string `xorm:"varchar(100)" json:"github"`
	Google   string `xorm:"varchar(100)" json:"google"`
	QQ       string `xorm:"qq varchar(100)" json:"qq"`
	WeChat   string `xorm:"wechat varchar(100)" json:"wechat"`
	Facebook string `xorm:"facebook varchar(100)" json:"facebook"`
	DingTalk string `xorm:"dingtalk varchar(100)" json:"dingtalk"`
	Weibo    string `xorm:"weibo varchar(100)" json:"weibo"`
	Gitee    string `xorm:"gitee varchar(100)" json:"gitee"`
	LinkedIn string `xorm:"linkedin varchar(100)" json:"linkedin"`
	Wecom    string `xorm:"wecom varchar(100)" json:"wecom"`
	Lark     string `xorm:"lark varchar(100)" json:"lark"`
	Gitlab   string `xorm:"gitlab varchar(100)" json:"gitlab"`

	Ldap       string            `xorm:"ldap varchar(100)" json:"ldap"`
	Properties map[string]string `json:"properties"`
}

func GetGlobalUserCount() int {
	count, err := adapter.Engine.Count(&User{})
	if err != nil {
		panic(err)
	}

	return int(count)
}

func GetGlobalUsers() []*User {
	users := []*User{}
	err := adapter.Engine.Desc("created_time").Find(&users)
	if err != nil {
		panic(err)
	}

	return users
}

func GetPaginationGlobalUsers(offset, limit int) []*User {
	users := []*User{}
	err := adapter.Engine.Desc("created_time").Limit(limit, offset).Find(&users)
	if err != nil {
		panic(err)
	}

	return users
}

func GetUserCount(owner string) int {
	count, err := adapter.Engine.Count(&User{Owner: owner})
	if err != nil {
		panic(err)
	}

	return int(count)
}

func GetUsers(owner string) []*User {
	users := []*User{}
	err := adapter.Engine.Desc("created_time").Find(&users, &User{Owner: owner})
	if err != nil {
		panic(err)
	}

	return users
}

func GetPaginationUsers(owner string, offset, limit int) []*User {
	users := []*User{}
	err := adapter.Engine.Desc("created_time").Limit(limit, offset).Find(&users, &User{Owner: owner})
	if err != nil {
		panic(err)
	}

	return users
}

func getUser(owner string, name string) *User {
	if owner == "" || name == "" {
		return nil
	}

	user := User{Owner: owner, Name: name}
	existed, err := adapter.Engine.Get(&user)
	if err != nil {
		panic(err)
	}

	if existed {
		return &user
	} else {
		return nil
	}
}

func GetUser(id string) *User {
	owner, name := util.GetOwnerAndNameFromId(id)
	return getUser(owner, name)
}

func GetMaskedUser(user *User) *User {
	if user == nil {
		return nil
	}

	if user.Password != "" {
		user.Password = "***"
	}
	return user
}

func GetMaskedUsers(users []*User) []*User {
	for _, user := range users {
		user = GetMaskedUser(user)
	}
	return users
}

func GetLastUser(owner string) *User {
	user := User{Owner: owner}
	existed, err := adapter.Engine.Desc("created_time", "id").Get(&user)
	if err != nil {
		panic(err)
	}

	if existed {
		return &user
	}

	return nil
}

func UpdateUser(id string, user *User) bool {
	owner, name := util.GetOwnerAndNameFromId(id)
	oldUser := getUser(owner, name)
	if oldUser == nil {
		return false
	}

	user.UpdateUserHash()

	if user.Avatar != oldUser.Avatar && user.Avatar != "" {
		user.PermanentAvatar = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar)
	}

	affected, err := adapter.Engine.ID(core.PK{owner, name}).Cols("owner", "display_name", "avatar",
		"location", "address", "region", "language", "affiliation", "title", "homepage", "bio", "score", "tag", "is_admin", "is_global_admin", "is_forbidden",
		"hash", "properties").Update(user)
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func UpdateUserForAllFields(id string, user *User) bool {
	owner, name := util.GetOwnerAndNameFromId(id)
	oldUser := getUser(owner, name)
	if oldUser == nil {
		return false
	}

	user.UpdateUserHash()

	if user.Avatar != oldUser.Avatar && user.Avatar != "" {
		user.PermanentAvatar = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar)
	}

	affected, err := adapter.Engine.ID(core.PK{owner, name}).AllCols().Update(user)
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func UpdateUserForOriginalFields(user *User) bool {
	owner, name := util.GetOwnerAndNameFromId(user.GetId())
	oldUser := getUser(owner, name)
	if oldUser == nil {
		return false
	}

	if user.Avatar != oldUser.Avatar && user.Avatar != "" {
		user.PermanentAvatar = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar)
	}

	affected, err := adapter.Engine.ID(core.PK{user.Owner, user.Name}).Cols("display_name", "password", "phone", "avatar", "affiliation", "score", "is_forbidden", "hash", "pre_hash").Update(user)
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func AddUser(user *User) bool {
	if user.Id == "" {
		user.Id = util.GenerateId()
	}

	organization := GetOrganizationByUser(user)
	user.UpdateUserPassword(organization)

	user.UpdateUserHash()
	user.PreHash = user.Hash

	user.PermanentAvatar = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar)

	affected, err := adapter.Engine.Insert(user)
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func AddUsers(users []*User) bool {
	if len(users) == 0 {
		return false
	}

	organization := GetOrganizationByUser(users[0])
	for _, user := range users {
		user.UpdateUserPassword(organization)

		user.UpdateUserHash()
		user.PreHash = user.Hash

		user.PermanentAvatar = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar)
	}

	affected, err := adapter.Engine.Insert(users)
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func AddUsersSafe(users []*User) bool {
	batchSize := 1000

	if len(users) == 0 {
		return false
	}

	affected := false
	for i := 0; i < (len(users)-1)/batchSize+1; i++ {
		start := i * batchSize
		end := (i + 1) * batchSize
		if end > len(users) {
			end = len(users)
		}

		tmp := users[start:end]
		// TODO: save to log instead of standard output
		// fmt.Printf("Add users: [%d - %d].\n", start, end)
		if AddUsers(tmp) {
			affected = true
		}
	}

	return affected
}

func DeleteUser(user *User) bool {
	affected, err := adapter.Engine.ID(core.PK{user.Owner, user.Name}).Delete(&User{})
	if err != nil {
		panic(err)
	}

	return affected != 0
}

func LinkUserAccount(user *User, field string, value string) bool {
	return SetUserField(user, field, value)
}

func (user *User) GetId() string {
	return fmt.Sprintf("%s/%s", user.Owner, user.Name)
}