// 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 entc, DO NOT EDIT.

package ent

import (
	"context"
	"errors"
	"fmt"
	"math"

	"github.com/facebook/ent/dialect/gremlin"
	"github.com/facebook/ent/dialect/gremlin/graph/dsl"
	"github.com/facebook/ent/dialect/gremlin/graph/dsl/__"
	"github.com/facebook/ent/dialect/gremlin/graph/dsl/g"
	"github.com/facebook/ent/entc/integration/gremlin/ent/file"
	"github.com/facebook/ent/entc/integration/gremlin/ent/filetype"
	"github.com/facebook/ent/entc/integration/gremlin/ent/predicate"
	"github.com/facebook/ent/entc/integration/gremlin/ent/user"
)

// FileQuery is the builder for querying File entities.
type FileQuery struct {
	config
	limit      *int
	offset     *int
	order      []OrderFunc
	predicates []predicate.File
	// eager-loading edges.
	withOwner *UserQuery
	withType  *FileTypeQuery
	withField *FieldTypeQuery
	// intermediate query (i.e. traversal path).
	gremlin *dsl.Traversal
	path    func(context.Context) (*dsl.Traversal, error)
}

// Where adds a new predicate for the builder.
func (fq *FileQuery) Where(ps ...predicate.File) *FileQuery {
	fq.predicates = append(fq.predicates, ps...)
	return fq
}

// Limit adds a limit step to the query.
func (fq *FileQuery) Limit(limit int) *FileQuery {
	fq.limit = &limit
	return fq
}

// Offset adds an offset step to the query.
func (fq *FileQuery) Offset(offset int) *FileQuery {
	fq.offset = &offset
	return fq
}

// Order adds an order step to the query.
func (fq *FileQuery) Order(o ...OrderFunc) *FileQuery {
	fq.order = append(fq.order, o...)
	return fq
}

// QueryOwner chains the current query on the owner edge.
func (fq *FileQuery) QueryOwner() *UserQuery {
	query := &UserQuery{config: fq.config}
	query.path = func(ctx context.Context) (fromU *dsl.Traversal, err error) {
		if err := fq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		gremlin := fq.gremlinQuery()
		fromU = gremlin.InE(user.FilesLabel).OutV()
		return fromU, nil
	}
	return query
}

// QueryType chains the current query on the type edge.
func (fq *FileQuery) QueryType() *FileTypeQuery {
	query := &FileTypeQuery{config: fq.config}
	query.path = func(ctx context.Context) (fromU *dsl.Traversal, err error) {
		if err := fq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		gremlin := fq.gremlinQuery()
		fromU = gremlin.InE(filetype.FilesLabel).OutV()
		return fromU, nil
	}
	return query
}

// QueryField chains the current query on the field edge.
func (fq *FileQuery) QueryField() *FieldTypeQuery {
	query := &FieldTypeQuery{config: fq.config}
	query.path = func(ctx context.Context) (fromU *dsl.Traversal, err error) {
		if err := fq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		gremlin := fq.gremlinQuery()
		fromU = gremlin.OutE(file.FieldLabel).InV()
		return fromU, nil
	}
	return query
}

// First returns the first File entity in the query. Returns *NotFoundError when no file was found.
func (fq *FileQuery) First(ctx context.Context) (*File, error) {
	nodes, err := fq.Limit(1).All(ctx)
	if err != nil {
		return nil, err
	}
	if len(nodes) == 0 {
		return nil, &NotFoundError{file.Label}
	}
	return nodes[0], nil
}

// FirstX is like First, but panics if an error occurs.
func (fq *FileQuery) FirstX(ctx context.Context) *File {
	node, err := fq.First(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return node
}

// FirstID returns the first File id in the query. Returns *NotFoundError when no id was found.
func (fq *FileQuery) FirstID(ctx context.Context) (id string, err error) {
	var ids []string
	if ids, err = fq.Limit(1).IDs(ctx); err != nil {
		return
	}
	if len(ids) == 0 {
		err = &NotFoundError{file.Label}
		return
	}
	return ids[0], nil
}

// FirstIDX is like FirstID, but panics if an error occurs.
func (fq *FileQuery) FirstIDX(ctx context.Context) string {
	id, err := fq.FirstID(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return id
}

// Only returns the only File entity in the query, returns an error if not exactly one entity was returned.
func (fq *FileQuery) Only(ctx context.Context) (*File, error) {
	nodes, err := fq.Limit(2).All(ctx)
	if err != nil {
		return nil, err
	}
	switch len(nodes) {
	case 1:
		return nodes[0], nil
	case 0:
		return nil, &NotFoundError{file.Label}
	default:
		return nil, &NotSingularError{file.Label}
	}
}

// OnlyX is like Only, but panics if an error occurs.
func (fq *FileQuery) OnlyX(ctx context.Context) *File {
	node, err := fq.Only(ctx)
	if err != nil {
		panic(err)
	}
	return node
}

// OnlyID returns the only File id in the query, returns an error if not exactly one id was returned.
func (fq *FileQuery) OnlyID(ctx context.Context) (id string, err error) {
	var ids []string
	if ids, err = fq.Limit(2).IDs(ctx); err != nil {
		return
	}
	switch len(ids) {
	case 1:
		id = ids[0]
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = &NotSingularError{file.Label}
	}
	return
}

// OnlyIDX is like OnlyID, but panics if an error occurs.
func (fq *FileQuery) OnlyIDX(ctx context.Context) string {
	id, err := fq.OnlyID(ctx)
	if err != nil {
		panic(err)
	}
	return id
}

// All executes the query and returns a list of Files.
func (fq *FileQuery) All(ctx context.Context) ([]*File, error) {
	if err := fq.prepareQuery(ctx); err != nil {
		return nil, err
	}
	return fq.gremlinAll(ctx)
}

// AllX is like All, but panics if an error occurs.
func (fq *FileQuery) AllX(ctx context.Context) []*File {
	nodes, err := fq.All(ctx)
	if err != nil {
		panic(err)
	}
	return nodes
}

// IDs executes the query and returns a list of File ids.
func (fq *FileQuery) IDs(ctx context.Context) ([]string, error) {
	var ids []string
	if err := fq.Select(file.FieldID).Scan(ctx, &ids); err != nil {
		return nil, err
	}
	return ids, nil
}

// IDsX is like IDs, but panics if an error occurs.
func (fq *FileQuery) IDsX(ctx context.Context) []string {
	ids, err := fq.IDs(ctx)
	if err != nil {
		panic(err)
	}
	return ids
}

// Count returns the count of the given query.
func (fq *FileQuery) Count(ctx context.Context) (int, error) {
	if err := fq.prepareQuery(ctx); err != nil {
		return 0, err
	}
	return fq.gremlinCount(ctx)
}

// CountX is like Count, but panics if an error occurs.
func (fq *FileQuery) CountX(ctx context.Context) int {
	count, err := fq.Count(ctx)
	if err != nil {
		panic(err)
	}
	return count
}

// Exist returns true if the query has elements in the graph.
func (fq *FileQuery) Exist(ctx context.Context) (bool, error) {
	if err := fq.prepareQuery(ctx); err != nil {
		return false, err
	}
	return fq.gremlinExist(ctx)
}

// ExistX is like Exist, but panics if an error occurs.
func (fq *FileQuery) ExistX(ctx context.Context) bool {
	exist, err := fq.Exist(ctx)
	if err != nil {
		panic(err)
	}
	return exist
}

// Clone returns a duplicate of the query builder, including all associated steps. It can be
// used to prepare common query builders and use them differently after the clone is made.
func (fq *FileQuery) Clone() *FileQuery {
	if fq == nil {
		return nil
	}
	return &FileQuery{
		config:     fq.config,
		limit:      fq.limit,
		offset:     fq.offset,
		order:      append([]OrderFunc{}, fq.order...),
		predicates: append([]predicate.File{}, fq.predicates...),
		withOwner:  fq.withOwner.Clone(),
		withType:   fq.withType.Clone(),
		withField:  fq.withField.Clone(),
		// clone intermediate query.
		gremlin: fq.gremlin.Clone(),
		path:    fq.path,
	}
}

//  WithOwner tells the query-builder to eager-loads the nodes that are connected to
// the "owner" edge. The optional arguments used to configure the query builder of the edge.
func (fq *FileQuery) WithOwner(opts ...func(*UserQuery)) *FileQuery {
	query := &UserQuery{config: fq.config}
	for _, opt := range opts {
		opt(query)
	}
	fq.withOwner = query
	return fq
}

//  WithType tells the query-builder to eager-loads the nodes that are connected to
// the "type" edge. The optional arguments used to configure the query builder of the edge.
func (fq *FileQuery) WithType(opts ...func(*FileTypeQuery)) *FileQuery {
	query := &FileTypeQuery{config: fq.config}
	for _, opt := range opts {
		opt(query)
	}
	fq.withType = query
	return fq
}

//  WithField tells the query-builder to eager-loads the nodes that are connected to
// the "field" edge. The optional arguments used to configure the query builder of the edge.
func (fq *FileQuery) WithField(opts ...func(*FieldTypeQuery)) *FileQuery {
	query := &FieldTypeQuery{config: fq.config}
	for _, opt := range opts {
		opt(query)
	}
	fq.withField = query
	return fq
}

// GroupBy used to group vertices by one or more fields/columns.
// It is often used with aggregate functions, like: count, max, mean, min, sum.
//
// Example:
//
//	var v []struct {
//		Size int `json:"size,omitempty"`
//		Count int `json:"count,omitempty"`
//	}
//
//	client.File.Query().
//		GroupBy(file.FieldSize).
//		Aggregate(ent.Count()).
//		Scan(ctx, &v)
//
func (fq *FileQuery) GroupBy(field string, fields ...string) *FileGroupBy {
	group := &FileGroupBy{config: fq.config}
	group.fields = append([]string{field}, fields...)
	group.path = func(ctx context.Context) (prev *dsl.Traversal, err error) {
		if err := fq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		return fq.gremlinQuery(), nil
	}
	return group
}

// Select one or more fields from the given query.
//
// Example:
//
//	var v []struct {
//		Size int `json:"size,omitempty"`
//	}
//
//	client.File.Query().
//		Select(file.FieldSize).
//		Scan(ctx, &v)
//
func (fq *FileQuery) Select(field string, fields ...string) *FileSelect {
	selector := &FileSelect{config: fq.config}
	selector.fields = append([]string{field}, fields...)
	selector.path = func(ctx context.Context) (prev *dsl.Traversal, err error) {
		if err := fq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		return fq.gremlinQuery(), nil
	}
	return selector
}

func (fq *FileQuery) prepareQuery(ctx context.Context) error {
	if fq.path != nil {
		prev, err := fq.path(ctx)
		if err != nil {
			return err
		}
		fq.gremlin = prev
	}
	return nil
}

func (fq *FileQuery) gremlinAll(ctx context.Context) ([]*File, error) {
	res := &gremlin.Response{}
	query, bindings := fq.gremlinQuery().ValueMap(true).Query()
	if err := fq.driver.Exec(ctx, query, bindings, res); err != nil {
		return nil, err
	}
	var fs Files
	if err := fs.FromResponse(res); err != nil {
		return nil, err
	}
	fs.config(fq.config)
	return fs, nil
}

func (fq *FileQuery) gremlinCount(ctx context.Context) (int, error) {
	res := &gremlin.Response{}
	query, bindings := fq.gremlinQuery().Count().Query()
	if err := fq.driver.Exec(ctx, query, bindings, res); err != nil {
		return 0, err
	}
	return res.ReadInt()
}

func (fq *FileQuery) gremlinExist(ctx context.Context) (bool, error) {
	res := &gremlin.Response{}
	query, bindings := fq.gremlinQuery().HasNext().Query()
	if err := fq.driver.Exec(ctx, query, bindings, res); err != nil {
		return false, err
	}
	return res.ReadBool()
}

func (fq *FileQuery) gremlinQuery() *dsl.Traversal {
	v := g.V().HasLabel(file.Label)
	if fq.gremlin != nil {
		v = fq.gremlin.Clone()
	}
	for _, p := range fq.predicates {
		p(v)
	}
	if len(fq.order) > 0 {
		v.Order()
		for _, p := range fq.order {
			p(v)
		}
	}
	switch limit, offset := fq.limit, fq.offset; {
	case limit != nil && offset != nil:
		v.Range(*offset, *offset+*limit)
	case offset != nil:
		v.Range(*offset, math.MaxInt32)
	case limit != nil:
		v.Limit(*limit)
	}
	v.Dedup()
	return v
}

// FileGroupBy is the builder for group-by File entities.
type FileGroupBy struct {
	config
	fields []string
	fns    []AggregateFunc
	// intermediate query (i.e. traversal path).
	gremlin *dsl.Traversal
	path    func(context.Context) (*dsl.Traversal, error)
}

// Aggregate adds the given aggregation functions to the group-by query.
func (fgb *FileGroupBy) Aggregate(fns ...AggregateFunc) *FileGroupBy {
	fgb.fns = append(fgb.fns, fns...)
	return fgb
}

// Scan applies the group-by query and scan the result into the given value.
func (fgb *FileGroupBy) Scan(ctx context.Context, v interface{}) error {
	query, err := fgb.path(ctx)
	if err != nil {
		return err
	}
	fgb.gremlin = query
	return fgb.gremlinScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (fgb *FileGroupBy) ScanX(ctx context.Context, v interface{}) {
	if err := fgb.Scan(ctx, v); err != nil {
		panic(err)
	}
}

// Strings returns list of strings from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Strings(ctx context.Context) ([]string, error) {
	if len(fgb.fields) > 1 {
		return nil, errors.New("ent: FileGroupBy.Strings is not achievable when grouping more than 1 field")
	}
	var v []string
	if err := fgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (fgb *FileGroupBy) StringsX(ctx context.Context) []string {
	v, err := fgb.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = fgb.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileGroupBy.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (fgb *FileGroupBy) StringX(ctx context.Context) string {
	v, err := fgb.String(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Ints returns list of ints from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Ints(ctx context.Context) ([]int, error) {
	if len(fgb.fields) > 1 {
		return nil, errors.New("ent: FileGroupBy.Ints is not achievable when grouping more than 1 field")
	}
	var v []int
	if err := fgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (fgb *FileGroupBy) IntsX(ctx context.Context) []int {
	v, err := fgb.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = fgb.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileGroupBy.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (fgb *FileGroupBy) IntX(ctx context.Context) int {
	v, err := fgb.Int(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64s returns list of float64s from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Float64s(ctx context.Context) ([]float64, error) {
	if len(fgb.fields) > 1 {
		return nil, errors.New("ent: FileGroupBy.Float64s is not achievable when grouping more than 1 field")
	}
	var v []float64
	if err := fgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (fgb *FileGroupBy) Float64sX(ctx context.Context) []float64 {
	v, err := fgb.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = fgb.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileGroupBy.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (fgb *FileGroupBy) Float64X(ctx context.Context) float64 {
	v, err := fgb.Float64(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bools returns list of bools from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Bools(ctx context.Context) ([]bool, error) {
	if len(fgb.fields) > 1 {
		return nil, errors.New("ent: FileGroupBy.Bools is not achievable when grouping more than 1 field")
	}
	var v []bool
	if err := fgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (fgb *FileGroupBy) BoolsX(ctx context.Context) []bool {
	v, err := fgb.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from group-by. It is only allowed when querying group-by with one field.
func (fgb *FileGroupBy) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = fgb.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileGroupBy.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (fgb *FileGroupBy) BoolX(ctx context.Context) bool {
	v, err := fgb.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (fgb *FileGroupBy) gremlinScan(ctx context.Context, v interface{}) error {
	res := &gremlin.Response{}
	query, bindings := fgb.gremlinQuery().Query()
	if err := fgb.driver.Exec(ctx, query, bindings, res); err != nil {
		return err
	}
	if len(fgb.fields)+len(fgb.fns) == 1 {
		return res.ReadVal(v)
	}
	vm, err := res.ReadValueMap()
	if err != nil {
		return err
	}
	return vm.Decode(v)
}

func (fgb *FileGroupBy) gremlinQuery() *dsl.Traversal {
	var (
		trs   []interface{}
		names []interface{}
	)
	for _, fn := range fgb.fns {
		name, tr := fn("p", "")
		trs = append(trs, tr)
		names = append(names, name)
	}
	for _, f := range fgb.fields {
		names = append(names, f)
		trs = append(trs, __.As("p").Unfold().Values(f).As(f))
	}
	return fgb.gremlin.Group().
		By(__.Values(fgb.fields...).Fold()).
		By(__.Fold().Match(trs...).Select(names...)).
		Select(dsl.Values).
		Next()
}

// FileSelect is the builder for select fields of File entities.
type FileSelect struct {
	config
	fields []string
	// intermediate query (i.e. traversal path).
	gremlin *dsl.Traversal
	path    func(context.Context) (*dsl.Traversal, error)
}

// Scan applies the selector query and scan the result into the given value.
func (fs *FileSelect) Scan(ctx context.Context, v interface{}) error {
	query, err := fs.path(ctx)
	if err != nil {
		return err
	}
	fs.gremlin = query
	return fs.gremlinScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (fs *FileSelect) ScanX(ctx context.Context, v interface{}) {
	if err := fs.Scan(ctx, v); err != nil {
		panic(err)
	}
}

// Strings returns list of strings from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Strings(ctx context.Context) ([]string, error) {
	if len(fs.fields) > 1 {
		return nil, errors.New("ent: FileSelect.Strings is not achievable when selecting more than 1 field")
	}
	var v []string
	if err := fs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (fs *FileSelect) StringsX(ctx context.Context) []string {
	v, err := fs.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from selector. It is only allowed when selecting one field.
func (fs *FileSelect) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = fs.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileSelect.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (fs *FileSelect) StringX(ctx context.Context) string {
	v, err := fs.String(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Ints returns list of ints from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Ints(ctx context.Context) ([]int, error) {
	if len(fs.fields) > 1 {
		return nil, errors.New("ent: FileSelect.Ints is not achievable when selecting more than 1 field")
	}
	var v []int
	if err := fs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (fs *FileSelect) IntsX(ctx context.Context) []int {
	v, err := fs.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = fs.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileSelect.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (fs *FileSelect) IntX(ctx context.Context) int {
	v, err := fs.Int(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64s returns list of float64s from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Float64s(ctx context.Context) ([]float64, error) {
	if len(fs.fields) > 1 {
		return nil, errors.New("ent: FileSelect.Float64s is not achievable when selecting more than 1 field")
	}
	var v []float64
	if err := fs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (fs *FileSelect) Float64sX(ctx context.Context) []float64 {
	v, err := fs.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = fs.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileSelect.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (fs *FileSelect) Float64X(ctx context.Context) float64 {
	v, err := fs.Float64(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bools returns list of bools from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Bools(ctx context.Context) ([]bool, error) {
	if len(fs.fields) > 1 {
		return nil, errors.New("ent: FileSelect.Bools is not achievable when selecting more than 1 field")
	}
	var v []bool
	if err := fs.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (fs *FileSelect) BoolsX(ctx context.Context) []bool {
	v, err := fs.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from selector. It is only allowed when selecting one field.
func (fs *FileSelect) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = fs.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{file.Label}
	default:
		err = fmt.Errorf("ent: FileSelect.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (fs *FileSelect) BoolX(ctx context.Context) bool {
	v, err := fs.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (fs *FileSelect) gremlinScan(ctx context.Context, v interface{}) error {
	var (
		traversal *dsl.Traversal
		res       = &gremlin.Response{}
	)
	if len(fs.fields) == 1 {
		if fs.fields[0] != file.FieldID {
			traversal = fs.gremlin.Values(fs.fields...)
		} else {
			traversal = fs.gremlin.ID()
		}
	} else {
		fields := make([]interface{}, len(fs.fields))
		for i, f := range fs.fields {
			fields[i] = f
		}
		traversal = fs.gremlin.ValueMap(fields...)
	}
	query, bindings := traversal.Query()
	if err := fs.driver.Exec(ctx, query, bindings, res); err != nil {
		return err
	}
	if len(fs.fields) == 1 {
		return res.ReadVal(v)
	}
	vm, err := res.ReadValueMap()
	if err != nil {
		return err
	}
	return vm.Decode(v)
}
