package system

import (
	"errors"
	"fmt"
	"time"

	"github.com/gofrs/uuid/v5"
	"gorm.io/gorm"
	"pychr/global"
	"pychr/model/common/request"
	"pychr/model/system"
	"pychr/utils"
)

// @author: [piexlmax](https://github.com/piexlmax)
// @function: Register
// @description: 用户注册
// @param: u model.SysUser
// @return: userInter system.SysUser, err error

type UserService struct{}

func (userService *UserService) Register(u system.SysUser) (userInter system.SysUser, err error) {
	var user system.SysUser
	if !errors.Is(global.GVA_DB.Where("username = ?", u.Username).First(&user).Error, gorm.ErrRecordNotFound) { // 判断用户名是否注册
		return userInter, errors.New("用户名已注册")
	}
	// 否则 附加uuid 密码hash加密 注册
	u.Password = utils.BcryptHash(u.Password)
	u.UUID = uuid.Must(uuid.NewV4())
	err = global.GVA_DB.Create(&u).Error
	return u, err
}

// @author: [piexlmax](https://github.com/piexlmax)
// @author: [SliverHorn](https://github.com/SliverHorn)
// @function: Login
// @description: 用户登录
// @param: u *model.SysUser
// @return: err error, userInter *model.SysUser

func (userService *UserService) Login(u *system.SysUser) (userInter *system.SysUser, err error) {
	if nil == global.GVA_DB {
		return nil, fmt.Errorf("db not init")
	}

	var user system.SysUser
	err = global.GVA_DB.Where("username = ?", u.Username).Preload("Authorities").Preload("Authority").First(&user).Error
	if err == nil {
		if ok := utils.BcryptCheck(u.Password, user.Password); !ok {
			return nil, errors.New("密码错误")
		}
		MenuServiceApp.UserAuthorityDefaultRouter(&user)
	}
	return &user, err
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: ChangePassword
// @description: 修改用户密码
// @param: u *model.SysUser, newPassword string
// @return: userInter *model.SysUser,err error

func (userService *UserService) ChangePassword(u *system.SysUser, newPassword string) (userInter *system.SysUser, err error) {
	var user system.SysUser
	if err = global.GVA_DB.Where("id = ?", u.ID).First(&user).Error; err != nil {
		return nil, err
	}
	if ok := utils.BcryptCheck(u.Password, user.Password); !ok {
		return nil, errors.New("原密码错误")
	}
	user.Password = utils.BcryptHash(newPassword)
	err = global.GVA_DB.Save(&user).Error
	return &user, err

}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: GetUserInfoList
// @description: 分页获取数据
// @param: info request.PageInfo
// @return: err error, list interface{}, total int64

func (userService *UserService) GetUserInfoList(info request.PageInfo) (list interface{}, total int64, err error) {
	limit := info.PageSize
	offset := info.PageSize * (info.Page - 1)
	db := global.GVA_DB.Model(&system.SysUser{})
	var userList []system.SysUser
	err = db.Count(&total).Error
	if err != nil {
		return
	}
	err = db.Limit(limit).Offset(offset).Preload("Authorities").Preload("Authority").Find(&userList).Error
	return userList, total, err
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: SetUserAuthority
// @description: 设置一个用户的权限
// @param: uuid uuid.UUID, authorityId string
// @return: err error

func (userService *UserService) SetUserAuthority(id uint64, authorityId uint64) (err error) {
	assignErr := global.GVA_DB.Where("sys_user_id = ? AND sys_authority_authority_id = ?", id, authorityId).First(&system.SysUserAuthority{}).Error
	if errors.Is(assignErr, gorm.ErrRecordNotFound) {
		return errors.New("该用户无此角色")
	}
	err = global.GVA_DB.Where("id = ?", id).First(&system.SysUser{}).Update("authority_id", authorityId).Error
	return err
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: SetUserAuthorities
// @description: 设置一个用户的权限
// @param: id uint64, authorityIds []string
// @return: err error

func (userService *UserService) SetUserAuthorities(id uint64, authorityIds []uint64) (err error) {
	return global.GVA_DB.Transaction(func(tx *gorm.DB) error {
		TxErr := tx.Delete(&[]system.SysUserAuthority{}, "sys_user_id = ?", id).Error
		if TxErr != nil {
			return TxErr
		}
		var useAuthority []system.SysUserAuthority
		for _, v := range authorityIds {
			useAuthority = append(useAuthority, system.SysUserAuthority{
				SysUserId: id, SysAuthorityAuthorityId: v,
			})
		}
		TxErr = tx.Create(&useAuthority).Error
		if TxErr != nil {
			return TxErr
		}
		TxErr = tx.Where("id = ?", id).First(&system.SysUser{}).Update("authority_id", authorityIds[0]).Error
		if TxErr != nil {
			return TxErr
		}
		// 返回 nil 提交事务
		return nil
	})
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: DeleteUser
// @description: 删除用户
// @param: id float64
// @return: err error

func (userService *UserService) DeleteUser(id int) (err error) {
	return global.GVA_DB.Transaction(func(tx *gorm.DB) error {
		if err := tx.Where("id = ?", id).Delete(&system.SysUser{}).Error; err != nil {
			return err
		}
		if err := tx.Delete(&[]system.SysUserAuthority{}, "sys_user_id = ?", id).Error; err != nil {
			return err
		}
		return nil
	})
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: SetUserInfo
// @description: 设置用户信息
// @param: reqUser model.SysUser
// @return: err error, user model.SysUser

func (userService *UserService) SetUserInfo(req system.SysUser) error {
	return global.GVA_DB.Model(&system.SysUser{}).
		Select("updated_at", "nick_name", "header_img", "phone", "email", "sideMode", "enable").
		Where("id=?", req.ID).
		Updates(map[string]interface{}{
			"updated_at": time.Now(),
			"nick_name":  req.NickName,
			"header_img": req.HeaderImg,
			"phone":      req.Phone,
			"email":      req.Email,
			"side_mode":  req.SideMode,
			"enable":     req.Enable,
		}).Error
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: SetUserInfo
// @description: 设置用户信息
// @param: reqUser model.SysUser
// @return: err error, user model.SysUser

func (userService *UserService) SetSelfInfo(req system.SysUser) error {
	return global.GVA_DB.Model(&system.SysUser{}).
		Where("id=?", req.ID).
		Updates(req).Error
}

// @author: [piexlmax](https://github.com/piexlmax)
// @author: [SliverHorn](https://github.com/SliverHorn)
// @function: GetUserInfo
// @description: 获取用户信息
// @param: uuid uuid.UUID
// @return: err error, user system.SysUser

func (userService *UserService) GetUserInfo(uuid uuid.UUID) (user system.SysUser, err error) {
	var reqUser system.SysUser
	err = global.GVA_DB.Preload("Authorities").Preload("Authority").First(&reqUser, "uuid = ?", uuid).Error
	if err != nil {
		return reqUser, err
	}
	MenuServiceApp.UserAuthorityDefaultRouter(&reqUser)
	return reqUser, err
}

// @author: [SliverHorn](https://github.com/SliverHorn)
// @function: FindUserById
// @description: 通过id获取用户信息
// @param: id int
// @return: err error, user *model.SysUser

func (userService *UserService) FindUserById(id int) (user *system.SysUser, err error) {
	var u system.SysUser
	err = global.GVA_DB.Where("id = ?", id).First(&u).Error
	return &u, err
}

// @author: [SliverHorn](https://github.com/SliverHorn)
// @function: FindUserByUuid
// @description: 通过uuid获取用户信息
// @param: uuid string
// @return: err error, user *model.SysUser

func (userService *UserService) FindUserByUuid(uuid string) (user *system.SysUser, err error) {
	var u system.SysUser
	if err = global.GVA_DB.Where("uuid = ?", uuid).First(&u).Error; err != nil {
		return &u, errors.New("用户不存在")
	}
	return &u, nil
}

// @author: [piexlmax](https://github.com/piexlmax)
// @function: resetPassword
// @description: 修改用户密码
// @param: ID uint64
// @return: err error

func (userService *UserService) ResetPassword(ID uint64) (err error) {
	err = global.GVA_DB.Model(&system.SysUser{}).Where("id = ?", ID).Update("password", utils.BcryptHash("123456")).Error
	return err
}