// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.

// Code generated by ent, DO NOT EDIT.

package ent

import (
	"context"
	"errors"
	"fmt"
	"sync"
	"time"

	"entgo.io/ent"
	"entgo.io/ent/examples/migration/ent/card"
	"entgo.io/ent/examples/migration/ent/payment"
	"entgo.io/ent/examples/migration/ent/pet"
	"entgo.io/ent/examples/migration/ent/session"
	"entgo.io/ent/examples/migration/ent/sessiondevice"
	"entgo.io/ent/examples/migration/ent/user"
	"github.com/google/uuid"
)

const (
	// Operation types.
	OpCreate    = ent.OpCreate
	OpDelete    = ent.OpDelete
	OpDeleteOne = ent.OpDeleteOne
	OpUpdate    = ent.OpUpdate
	OpUpdateOne = ent.OpUpdateOne

	// Node types.
	TypeCard          = "Card"
	TypePayment       = "Payment"
	TypePet           = "Pet"
	TypeSession       = "Session"
	TypeSessionDevice = "SessionDevice"
	TypeUser          = "User"
)

// CardMutation represents an operation that mutates the Card nodes in the graph.
type CardMutation struct {
	card.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Card, error)
}

var _ ent.Mutation = (*CardMutation)(nil)

// cardOption allows management of the mutation configuration using functional options.
type cardOption func(*CardMutation)

// newCardMutation creates new mutation for the Card entity.
func newCardMutation(c config, op Op, opts ...cardOption) *CardMutation {
	m := &CardMutation{
		Mutation: *card.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *CardMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withCardID sets the ID field of the mutation.
func withCardID(id int) cardOption {
	return func(m *CardMutation) {
		var (
			err   error
			once  sync.Once
			value *Card
		)
		m.oldValue = func(ctx context.Context) (*Card, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Card.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withCard sets the old Card of the mutation.
func withCard(node *Card) cardOption {
	return func(m *CardMutation) {
		m.oldValue = func(context.Context) (*Card, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m CardMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m CardMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *CardMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Card.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldType returns the old "type" field's value of the Card entity.
// If the Card object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CardMutation) OldType(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldType is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldType requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldType: %w", err)
	}
	return oldValue.Type, nil
}

// OldNumberHash returns the old "number_hash" field's value of the Card entity.
// If the Card object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CardMutation) OldNumberHash(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldNumberHash is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldNumberHash requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldNumberHash: %w", err)
	}
	return oldValue.NumberHash, nil
}

// OldCvvHash returns the old "cvv_hash" field's value of the Card entity.
// If the Card object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CardMutation) OldCvvHash(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCvvHash is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCvvHash requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCvvHash: %w", err)
	}
	return oldValue.CvvHash, nil
}

// OldExpiresAt returns the old "expires_at" field's value of the Card entity.
// If the Card object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CardMutation) OldExpiresAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldExpiresAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldExpiresAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldExpiresAt: %w", err)
	}
	return oldValue.ExpiresAt, nil
}

// OldOwnerID returns the old "owner_id" field's value of the Card entity.
// If the Card object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *CardMutation) OldOwnerID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldOwnerID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldOwnerID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldOwnerID: %w", err)
	}
	return oldValue.OwnerID, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *CardMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case card.FieldType:
		return m.OldType(ctx)
	case card.FieldNumberHash:
		return m.OldNumberHash(ctx)
	case card.FieldCvvHash:
		return m.OldCvvHash(ctx)
	case card.FieldExpiresAt:
		return m.OldExpiresAt(ctx)
	case card.FieldOwnerID:
		return m.OldOwnerID(ctx)
	}
	return nil, fmt.Errorf("unknown Card field %s", name)
}

// PaymentMutation represents an operation that mutates the Payment nodes in the graph.
type PaymentMutation struct {
	payment.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*Payment, error)
}

var _ ent.Mutation = (*PaymentMutation)(nil)

// paymentOption allows management of the mutation configuration using functional options.
type paymentOption func(*PaymentMutation)

// newPaymentMutation creates new mutation for the Payment entity.
func newPaymentMutation(c config, op Op, opts ...paymentOption) *PaymentMutation {
	m := &PaymentMutation{
		Mutation: *payment.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *PaymentMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withPaymentID sets the ID field of the mutation.
func withPaymentID(id int) paymentOption {
	return func(m *PaymentMutation) {
		var (
			err   error
			once  sync.Once
			value *Payment
		)
		m.oldValue = func(ctx context.Context) (*Payment, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Payment.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withPayment sets the old Payment of the mutation.
func withPayment(node *Payment) paymentOption {
	return func(m *PaymentMutation) {
		m.oldValue = func(context.Context) (*Payment, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m PaymentMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m PaymentMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *PaymentMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Payment.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldCardID returns the old "card_id" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldCardID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCardID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCardID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCardID: %w", err)
	}
	return oldValue.CardID, nil
}

// OldAmount returns the old "amount" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldAmount(ctx context.Context) (v float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAmount is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAmount requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAmount: %w", err)
	}
	return oldValue.Amount, nil
}

// OldCurrency returns the old "currency" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldCurrency(ctx context.Context) (v payment.Currency, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCurrency is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCurrency requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCurrency: %w", err)
	}
	return oldValue.Currency, nil
}

// OldTime returns the old "time" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldTime(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldTime is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldTime requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldTime: %w", err)
	}
	return oldValue.Time, nil
}

// OldDescription returns the old "description" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldDescription(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDescription is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDescription requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDescription: %w", err)
	}
	return oldValue.Description, nil
}

// OldStatus returns the old "status" field's value of the Payment entity.
// If the Payment object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PaymentMutation) OldStatus(ctx context.Context) (v payment.Status, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldStatus is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldStatus requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldStatus: %w", err)
	}
	return oldValue.Status, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *PaymentMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case payment.FieldCardID:
		return m.OldCardID(ctx)
	case payment.FieldAmount:
		return m.OldAmount(ctx)
	case payment.FieldCurrency:
		return m.OldCurrency(ctx)
	case payment.FieldTime:
		return m.OldTime(ctx)
	case payment.FieldDescription:
		return m.OldDescription(ctx)
	case payment.FieldStatus:
		return m.OldStatus(ctx)
	}
	return nil, fmt.Errorf("unknown Payment field %s", name)
}

// PetMutation represents an operation that mutates the Pet nodes in the graph.
type PetMutation struct {
	pet.Mutation
	config
	id       *uuid.UUID
	done     bool
	oldValue func(context.Context) (*Pet, error)
}

var _ ent.Mutation = (*PetMutation)(nil)

// petOption allows management of the mutation configuration using functional options.
type petOption func(*PetMutation)

// newPetMutation creates new mutation for the Pet entity.
func newPetMutation(c config, op Op, opts ...petOption) *PetMutation {
	m := &PetMutation{
		Mutation: *pet.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of Pet entities.
func (m *PetMutation) SetID(id uuid.UUID) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *PetMutation) ID() (id uuid.UUID, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withPetID sets the ID field of the mutation.
func withPetID(id uuid.UUID) petOption {
	return func(m *PetMutation) {
		var (
			err   error
			once  sync.Once
			value *Pet
		)
		m.oldValue = func(ctx context.Context) (*Pet, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Pet.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withPet sets the old Pet of the mutation.
func withPet(node *Pet) petOption {
	return func(m *PetMutation) {
		m.oldValue = func(context.Context) (*Pet, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m PetMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m PetMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *PetMutation) IDs(ctx context.Context) ([]uuid.UUID, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []uuid.UUID{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Pet.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldName returns the old "name" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldName: %w", err)
	}
	return oldValue.Name, nil
}

// OldAge returns the old "age" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldAge(ctx context.Context) (v float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAge is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAge requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAge: %w", err)
	}
	return oldValue.Age, nil
}

// OldWeight returns the old "weight" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldWeight(ctx context.Context) (v float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldWeight is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldWeight requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldWeight: %w", err)
	}
	return oldValue.Weight, nil
}

// OldBestFriendID returns the old "best_friend_id" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldBestFriendID(ctx context.Context) (v uuid.UUID, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldBestFriendID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldBestFriendID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldBestFriendID: %w", err)
	}
	return oldValue.BestFriendID, nil
}

// OldOwnerID returns the old "owner_id" field's value of the Pet entity.
// If the Pet object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *PetMutation) OldOwnerID(ctx context.Context) (v int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldOwnerID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldOwnerID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldOwnerID: %w", err)
	}
	return oldValue.OwnerID, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *PetMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case pet.FieldName:
		return m.OldName(ctx)
	case pet.FieldAge:
		return m.OldAge(ctx)
	case pet.FieldWeight:
		return m.OldWeight(ctx)
	case pet.FieldBestFriendID:
		return m.OldBestFriendID(ctx)
	case pet.FieldOwnerID:
		return m.OldOwnerID(ctx)
	}
	return nil, fmt.Errorf("unknown Pet field %s", name)
}

// SessionMutation represents an operation that mutates the Session nodes in the graph.
type SessionMutation struct {
	session.Mutation
	config
	id       *uuid.UUID
	done     bool
	oldValue func(context.Context) (*Session, error)
}

var _ ent.Mutation = (*SessionMutation)(nil)

// sessionOption allows management of the mutation configuration using functional options.
type sessionOption func(*SessionMutation)

// newSessionMutation creates new mutation for the Session entity.
func newSessionMutation(c config, op Op, opts ...sessionOption) *SessionMutation {
	m := &SessionMutation{
		Mutation: *session.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of Session entities.
func (m *SessionMutation) SetID(id uuid.UUID) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *SessionMutation) ID() (id uuid.UUID, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withSessionID sets the ID field of the mutation.
func withSessionID(id uuid.UUID) sessionOption {
	return func(m *SessionMutation) {
		var (
			err   error
			once  sync.Once
			value *Session
		)
		m.oldValue = func(ctx context.Context) (*Session, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().Session.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withSession sets the old Session of the mutation.
func withSession(node *Session) sessionOption {
	return func(m *SessionMutation) {
		m.oldValue = func(context.Context) (*Session, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m SessionMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m SessionMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *SessionMutation) IDs(ctx context.Context) ([]uuid.UUID, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []uuid.UUID{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().Session.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldActive returns the old "active" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldActive(ctx context.Context) (v bool, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldActive is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldActive requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldActive: %w", err)
	}
	return oldValue.Active, nil
}

// OldIssuedAt returns the old "issued_at" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldIssuedAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldIssuedAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldIssuedAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldIssuedAt: %w", err)
	}
	return oldValue.IssuedAt, nil
}

// OldExpiresAt returns the old "expires_at" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldExpiresAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldExpiresAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldExpiresAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldExpiresAt: %w", err)
	}
	return oldValue.ExpiresAt, nil
}

// OldToken returns the old "token" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldToken(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldToken is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldToken requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldToken: %w", err)
	}
	return oldValue.Token, nil
}

// OldMethod returns the old "method" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldMethod(ctx context.Context) (v map[string]interface{}, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldMethod is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldMethod requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldMethod: %w", err)
	}
	return oldValue.Method, nil
}

// OldDeviceID returns the old "device_id" field's value of the Session entity.
// If the Session object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionMutation) OldDeviceID(ctx context.Context) (v uuid.UUID, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDeviceID is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDeviceID requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDeviceID: %w", err)
	}
	return oldValue.DeviceID, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *SessionMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case session.FieldActive:
		return m.OldActive(ctx)
	case session.FieldIssuedAt:
		return m.OldIssuedAt(ctx)
	case session.FieldExpiresAt:
		return m.OldExpiresAt(ctx)
	case session.FieldToken:
		return m.OldToken(ctx)
	case session.FieldMethod:
		return m.OldMethod(ctx)
	case session.FieldDeviceID:
		return m.OldDeviceID(ctx)
	}
	return nil, fmt.Errorf("unknown Session field %s", name)
}

// SessionDeviceMutation represents an operation that mutates the SessionDevice nodes in the graph.
type SessionDeviceMutation struct {
	sessiondevice.Mutation
	config
	id       *uuid.UUID
	done     bool
	oldValue func(context.Context) (*SessionDevice, error)
}

var _ ent.Mutation = (*SessionDeviceMutation)(nil)

// sessiondeviceOption allows management of the mutation configuration using functional options.
type sessiondeviceOption func(*SessionDeviceMutation)

// newSessionDeviceMutation creates new mutation for the SessionDevice entity.
func newSessionDeviceMutation(c config, op Op, opts ...sessiondeviceOption) *SessionDeviceMutation {
	m := &SessionDeviceMutation{
		Mutation: *sessiondevice.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// SetID sets the value of the id field. Note that this
// operation is only accepted on creation of SessionDevice entities.
func (m *SessionDeviceMutation) SetID(id uuid.UUID) {
	m.id = &id
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *SessionDeviceMutation) ID() (id uuid.UUID, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withSessionDeviceID sets the ID field of the mutation.
func withSessionDeviceID(id uuid.UUID) sessiondeviceOption {
	return func(m *SessionDeviceMutation) {
		var (
			err   error
			once  sync.Once
			value *SessionDevice
		)
		m.oldValue = func(ctx context.Context) (*SessionDevice, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().SessionDevice.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withSessionDevice sets the old SessionDevice of the mutation.
func withSessionDevice(node *SessionDevice) sessiondeviceOption {
	return func(m *SessionDeviceMutation) {
		m.oldValue = func(context.Context) (*SessionDevice, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m SessionDeviceMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m SessionDeviceMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *SessionDeviceMutation) IDs(ctx context.Context) ([]uuid.UUID, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []uuid.UUID{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().SessionDevice.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldIPAddress returns the old "ip_address" field's value of the SessionDevice entity.
// If the SessionDevice object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionDeviceMutation) OldIPAddress(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldIPAddress is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldIPAddress requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldIPAddress: %w", err)
	}
	return oldValue.IPAddress, nil
}

// OldUserAgent returns the old "user_agent" field's value of the SessionDevice entity.
// If the SessionDevice object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionDeviceMutation) OldUserAgent(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUserAgent is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUserAgent requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUserAgent: %w", err)
	}
	return oldValue.UserAgent, nil
}

// OldLocation returns the old "location" field's value of the SessionDevice entity.
// If the SessionDevice object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionDeviceMutation) OldLocation(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldLocation is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldLocation requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldLocation: %w", err)
	}
	return oldValue.Location, nil
}

// OldCreatedAt returns the old "created_at" field's value of the SessionDevice entity.
// If the SessionDevice object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionDeviceMutation) OldCreatedAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldCreatedAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldCreatedAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldCreatedAt: %w", err)
	}
	return oldValue.CreatedAt, nil
}

// OldUpdatedAt returns the old "updated_at" field's value of the SessionDevice entity.
// If the SessionDevice object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *SessionDeviceMutation) OldUpdatedAt(ctx context.Context) (v time.Time, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUpdatedAt is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUpdatedAt requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUpdatedAt: %w", err)
	}
	return oldValue.UpdatedAt, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *SessionDeviceMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case sessiondevice.FieldIPAddress:
		return m.OldIPAddress(ctx)
	case sessiondevice.FieldUserAgent:
		return m.OldUserAgent(ctx)
	case sessiondevice.FieldLocation:
		return m.OldLocation(ctx)
	case sessiondevice.FieldCreatedAt:
		return m.OldCreatedAt(ctx)
	case sessiondevice.FieldUpdatedAt:
		return m.OldUpdatedAt(ctx)
	}
	return nil, fmt.Errorf("unknown SessionDevice field %s", name)
}

// UserMutation represents an operation that mutates the User nodes in the graph.
type UserMutation struct {
	user.Mutation
	config
	id       *int
	done     bool
	oldValue func(context.Context) (*User, error)
}

var _ ent.Mutation = (*UserMutation)(nil)

// userOption allows management of the mutation configuration using functional options.
type userOption func(*UserMutation)

// newUserMutation creates new mutation for the User entity.
func newUserMutation(c config, op Op, opts ...userOption) *UserMutation {
	m := &UserMutation{
		Mutation: *user.NewMutation(op),
		config:   c,
	}
	for _, opt := range opts {
		opt(m)
	}
	return m
}

// ID returns the ID value in the mutation. Note that the ID is only available
// if it was provided to the builder or after it was returned from the database.
func (m *UserMutation) ID() (id int, exists bool) {
	if m.id == nil {
		return
	}
	return *m.id, true
}

// withUserID sets the ID field of the mutation.
func withUserID(id int) userOption {
	return func(m *UserMutation) {
		var (
			err   error
			once  sync.Once
			value *User
		)
		m.oldValue = func(ctx context.Context) (*User, error) {
			once.Do(func() {
				if m.done {
					err = errors.New("querying old values post mutation is not allowed")
				} else {
					value, err = m.Client().User.Get(ctx, id)
				}
			})
			return value, err
		}
		m.id = &id
	}
}

// withUser sets the old User of the mutation.
func withUser(node *User) userOption {
	return func(m *UserMutation) {
		m.oldValue = func(context.Context) (*User, error) {
			return node, nil
		}
		m.id = &node.ID
	}
}

// Client returns a new `ent.Client` from the mutation. If the mutation was
// executed in a transaction (ent.Tx), a transactional client is returned.
func (m UserMutation) Client() *Client {
	client := &Client{config: m.config}
	client.init()
	return client
}

// Tx returns an `ent.Tx` for mutations that were executed in transactions;
// it returns an error otherwise.
func (m UserMutation) Tx() (*Tx, error) {
	if _, ok := m.driver.(*txDriver); !ok {
		return nil, errors.New("ent: mutation is not running in a transaction")
	}
	tx := &Tx{config: m.config}
	tx.init()
	return tx, nil
}

// IDs queries the database and returns the entity ids that match the mutation's predicate.
// That means, if the mutation is applied within a transaction with an isolation level such
// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
// or updated by the mutation.
func (m *UserMutation) IDs(ctx context.Context) ([]int, error) {
	switch {
	case m.Op().Is(OpUpdateOne | OpDeleteOne):
		id, exists := m.ID()
		if exists {
			return []int{id}, nil
		}
		fallthrough
	case m.Op().Is(OpUpdate | OpDelete):
		return m.Client().User.Query().Where(m.Predicates()...).IDs(ctx)
	default:
		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.Op())
	}
}

// OldAge returns the old "age" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldAge(ctx context.Context) (v float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAge is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAge requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAge: %w", err)
	}
	return oldValue.Age, nil
}

// OldFirstName returns the old "first_name" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldFirstName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldFirstName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldFirstName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldFirstName: %w", err)
	}
	return oldValue.FirstName, nil
}

// OldLastName returns the old "last_name" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldLastName(ctx context.Context) (v string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldLastName is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldLastName requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldLastName: %w", err)
	}
	return oldValue.LastName, nil
}

// OldTags returns the old "tags" field's value of the User entity.
// If the User object wasn't provided to the builder, the object is fetched from the database.
// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
func (m *UserMutation) OldTags(ctx context.Context) (v []string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldTags is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldTags requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldTags: %w", err)
	}
	return oldValue.Tags, nil
}

// OldField returns the old value of the field from the database. An error is
// returned if the mutation operation is not UpdateOne, or the query to the
// database failed.
func (m *UserMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	switch name {
	case user.FieldAge:
		return m.OldAge(ctx)
	case user.FieldFirstName:
		return m.OldFirstName(ctx)
	case user.FieldLastName:
		return m.OldLastName(ctx)
	case user.FieldTags:
		return m.OldTags(ctx)
	}
	return nil, fmt.Errorf("unknown User field %s", name)
}