// 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"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"net/url"
	"sync"

	"entgo.io/ent"
	"entgo.io/ent/entc/integration/json/ent/schema"
	"entgo.io/ent/entc/integration/json/ent/user"
)

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

	// Node types.
	TypeUser = "User"
)

// 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())
	}
}

// OldT returns the old "t" 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) OldT(ctx context.Context) (v *schema.T, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldT is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldT requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldT: %w", err)
	}
	return oldValue.T, nil
}

// OldURL returns the old "url" 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) OldURL(ctx context.Context) (v *url.URL, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldURL is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldURL requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldURL: %w", err)
	}
	return oldValue.URL, nil
}

// OldURLs returns the old "URLs" 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) OldURLs(ctx context.Context) (v []*url.URL, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldURLs is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldURLs requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldURLs: %w", err)
	}
	return oldValue.URLs, nil
}

// OldRaw returns the old "raw" 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) OldRaw(ctx context.Context) (v json.RawMessage, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldRaw is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldRaw requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldRaw: %w", err)
	}
	return oldValue.Raw, nil
}

// OldDirs returns the old "dirs" 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) OldDirs(ctx context.Context) (v []http.Dir, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldDirs is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldDirs requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldDirs: %w", err)
	}
	return oldValue.Dirs, nil
}

// OldInts returns the old "ints" 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) OldInts(ctx context.Context) (v []int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldInts is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldInts requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldInts: %w", err)
	}
	return oldValue.Ints, nil
}

// OldFloats returns the old "floats" 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) OldFloats(ctx context.Context) (v []float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldFloats is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldFloats requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldFloats: %w", err)
	}
	return oldValue.Floats, nil
}

// OldStrings returns the old "strings" 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) OldStrings(ctx context.Context) (v []string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldStrings is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldStrings requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldStrings: %w", err)
	}
	return oldValue.Strings, nil
}

// OldIntsValidate returns the old "ints_validate" 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) OldIntsValidate(ctx context.Context) (v []int, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldIntsValidate is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldIntsValidate requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldIntsValidate: %w", err)
	}
	return oldValue.IntsValidate, nil
}

// OldFloatsValidate returns the old "floats_validate" 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) OldFloatsValidate(ctx context.Context) (v []float64, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldFloatsValidate is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldFloatsValidate requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldFloatsValidate: %w", err)
	}
	return oldValue.FloatsValidate, nil
}

// OldStringsValidate returns the old "strings_validate" 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) OldStringsValidate(ctx context.Context) (v []string, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldStringsValidate is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldStringsValidate requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldStringsValidate: %w", err)
	}
	return oldValue.StringsValidate, nil
}

// OldAddr returns the old "addr" 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) OldAddr(ctx context.Context) (v schema.Addr, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldAddr is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldAddr requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldAddr: %w", err)
	}
	return oldValue.Addr, nil
}

// OldUnknown returns the old "unknown" 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) OldUnknown(ctx context.Context) (v any, err error) {
	if !m.Op().Is(OpUpdateOne) {
		return v, errors.New("OldUnknown is only allowed on UpdateOne operations")
	}
	if _, exists := m.ID(); !exists || m.oldValue == nil {
		return v, errors.New("OldUnknown requires an ID field in the mutation")
	}
	oldValue, err := m.oldValue(ctx)
	if err != nil {
		return v, fmt.Errorf("querying old value for OldUnknown: %w", err)
	}
	return oldValue.Unknown, 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.FieldT:
		return m.OldT(ctx)
	case user.FieldURL:
		return m.OldURL(ctx)
	case user.FieldURLs:
		return m.OldURLs(ctx)
	case user.FieldRaw:
		return m.OldRaw(ctx)
	case user.FieldDirs:
		return m.OldDirs(ctx)
	case user.FieldInts:
		return m.OldInts(ctx)
	case user.FieldFloats:
		return m.OldFloats(ctx)
	case user.FieldStrings:
		return m.OldStrings(ctx)
	case user.FieldIntsValidate:
		return m.OldIntsValidate(ctx)
	case user.FieldFloatsValidate:
		return m.OldFloatsValidate(ctx)
	case user.FieldStringsValidate:
		return m.OldStringsValidate(ctx)
	case user.FieldAddr:
		return m.OldAddr(ctx)
	case user.FieldUnknown:
		return m.OldUnknown(ctx)
	}
	return nil, fmt.Errorf("unknown User field %s", name)
}