// 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"
	"reflect"
	"strconv"
	"strings"

	"gitee.com/damengde/ent"
	"gitee.com/damengde/ent/dialect/gremlin"
	"gitee.com/damengde/ent/dialect/gremlin/encoding/graphson"
	"gitee.com/damengde/ent/dialect/gremlin/graph/dsl"
	"gitee.com/damengde/ent/dialect/gremlin/graph/dsl/__"
)

// ent aliases to avoid import conflicts in user's code.
type (
	Op            = ent.Op
	Hook          = ent.Hook
	Value         = ent.Value
	Query         = ent.Query
	QueryContext  = ent.QueryContext
	Querier       = ent.Querier
	QuerierFunc   = ent.QuerierFunc
	Interceptor   = ent.Interceptor
	InterceptFunc = ent.InterceptFunc
	Traverser     = ent.Traverser
	TraverseFunc  = ent.TraverseFunc
	Policy        = ent.Policy
	Mutator       = ent.Mutator
	Mutation      = ent.Mutation
	MutateFunc    = ent.MutateFunc
)

type clientCtxKey struct{}

// FromContext returns a Client stored inside a context, or nil if there isn't one.
func FromContext(ctx context.Context) *Client {
	c, _ := ctx.Value(clientCtxKey{}).(*Client)
	return c
}

// NewContext returns a new context with the given Client attached.
func NewContext(parent context.Context, c *Client) context.Context {
	return context.WithValue(parent, clientCtxKey{}, c)
}

type txCtxKey struct{}

// TxFromContext returns a Tx stored inside a context, or nil if there isn't one.
func TxFromContext(ctx context.Context) *Tx {
	tx, _ := ctx.Value(txCtxKey{}).(*Tx)
	return tx
}

// NewTxContext returns a new context with the given Tx attached.
func NewTxContext(parent context.Context, tx *Tx) context.Context {
	return context.WithValue(parent, txCtxKey{}, tx)
}

// OrderFunc applies an ordering on the graph traversal.
type OrderFunc func(*dsl.Traversal)

// Asc applies the given fields in ASC order.
func Asc(fields ...string) func(*dsl.Traversal) {
	return func(tr *dsl.Traversal) {
		for _, f := range fields {
			tr.By(f, dsl.Incr)
		}
	}
}

// Desc applies the given fields in DESC order.
func Desc(fields ...string) func(*dsl.Traversal) {
	return func(tr *dsl.Traversal) {
		for _, f := range fields {
			tr.By(f, dsl.Decr)
		}
	}
}

// AggregateFunc applies an aggregation step on the group-by traversal/selector.
// It gets two labels as parameters. The first used in the `As` step for the predicate,
// and the second is an optional name for the next predicates (or for later usage).
type AggregateFunc func(string, string) (string, *dsl.Traversal)

// As is a pseudo aggregation function for renaming another other functions with custom names. For example:
//
//	GroupBy(field1, field2).
//	Aggregate(ent.As(ent.Sum(field1), "sum_field1"), (ent.As(ent.Sum(field2), "sum_field2")).
//	Scan(ctx, &v)
func As(fn AggregateFunc, end string) AggregateFunc {
	return func(start, _ string) (string, *dsl.Traversal) {
		return fn(start, end)
	}
}

// DefaultCountLabel is the default label name for the Count aggregation function.
// It should be used as the struct-tag for decoding, or a map key for interaction with the returned response.
// In order to "count" 2 or more fields and avoid conflicting, use the `ent.As(ent.Count(field), "custom_name")`
// function with custom name in order to override it.
const DefaultCountLabel = "count"

// Count applies the "count" aggregation function on each group.
func Count() AggregateFunc {
	return func(start, end string) (string, *dsl.Traversal) {
		if end == "" {
			end = DefaultCountLabel
		}
		return end, __.As(start).Count(dsl.Local).As(end)
	}
}

// DefaultMaxLabel is the default label name for the Max aggregation function.
// It should be used as the struct-tag for decoding, or a map key for interaction with the returned response.
// In order to "max" 2 or more fields and avoid conflicting, use the `ent.As(ent.Max(field), "custom_name")`
// function with custom name in order to override it.
const DefaultMaxLabel = "max"

// Max applies the "max" aggregation function on the given field of each group.
func Max(field string) AggregateFunc {
	return func(start, end string) (string, *dsl.Traversal) {
		if end == "" {
			end = DefaultMaxLabel
		}
		return end, __.As(start).Unfold().Values(field).Max().As(end)
	}
}

// DefaultMeanLabel is the default label name for the Mean aggregation function.
// It should be used as the struct-tag for decoding, or a map key for interaction with the returned response.
// In order to "mean" 2 or more fields and avoid conflicting, use the `ent.As(ent.Mean(field), "custom_name")`
// function with custom name in order to override it.
const DefaultMeanLabel = "mean"

// Mean applies the "mean" aggregation function on the given field of each group.
func Mean(field string) AggregateFunc {
	return func(start, end string) (string, *dsl.Traversal) {
		if end == "" {
			end = DefaultMeanLabel
		}
		return end, __.As(start).Unfold().Values(field).Mean().As(end)
	}
}

// DefaultMinLabel is the default label name for the Min aggregation function.
// It should be used as the struct-tag for decoding, or a map key for interaction with the returned response.
// In order to "min" 2 or more fields and avoid conflicting, use the `ent.As(ent.Min(field), "custom_name")`
// function with custom name in order to override it.
const DefaultMinLabel = "min"

// Min applies the "min" aggregation function on the given field of each group.
func Min(field string) AggregateFunc {
	return func(start, end string) (string, *dsl.Traversal) {
		if end == "" {
			end = DefaultMinLabel
		}
		return end, __.As(start).Unfold().Values(field).Min().As(end)
	}
}

// DefaultSumLabel is the default label name for the Sum aggregation function.
// It should be used as the struct-tag for decoding, or a map key for interaction with the returned response.
// In order to "sum" 2 or more fields and avoid conflicting, use the `ent.As(ent.Sum(field), "custom_name")`
// function with custom name in order to override it.
const DefaultSumLabel = "sum"

// Sum applies the "sum" aggregation function on the given field of each group.
func Sum(field string) AggregateFunc {
	return func(start, end string) (string, *dsl.Traversal) {
		if end == "" {
			end = DefaultSumLabel
		}
		return end, __.As(start).Unfold().Values(field).Sum().As(end)
	}
}

// ValidationError returns when validating a field or edge fails.
type ValidationError struct {
	Name string // Field or edge name.
	err  error
}

// Error implements the error interface.
func (e *ValidationError) Error() string {
	return e.err.Error()
}

// Unwrap implements the errors.Wrapper interface.
func (e *ValidationError) Unwrap() error {
	return e.err
}

// IsValidationError returns a boolean indicating whether the error is a validation error.
func IsValidationError(err error) bool {
	if err == nil {
		return false
	}
	var e *ValidationError
	return errors.As(err, &e)
}

// NotFoundError returns when trying to fetch a specific entity and it was not found in the database.
type NotFoundError struct {
	label string
}

// Error implements the error interface.
func (e *NotFoundError) Error() string {
	return "ent: " + e.label + " not found"
}

// IsNotFound returns a boolean indicating whether the error is a not found error.
func IsNotFound(err error) bool {
	if err == nil {
		return false
	}
	var e *NotFoundError
	return errors.As(err, &e)
}

// MaskNotFound masks not found error.
func MaskNotFound(err error) error {
	if IsNotFound(err) {
		return nil
	}
	return err
}

// NotSingularError returns when trying to fetch a singular entity and more then one was found in the database.
type NotSingularError struct {
	label string
}

// Error implements the error interface.
func (e *NotSingularError) Error() string {
	return "ent: " + e.label + " not singular"
}

// IsNotSingular returns a boolean indicating whether the error is a not singular error.
func IsNotSingular(err error) bool {
	if err == nil {
		return false
	}
	var e *NotSingularError
	return errors.As(err, &e)
}

// NotLoadedError returns when trying to get a node that was not loaded by the query.
type NotLoadedError struct {
	edge string
}

// Error implements the error interface.
func (e *NotLoadedError) Error() string {
	return "ent: " + e.edge + " edge was not loaded"
}

// IsNotLoaded returns a boolean indicating whether the error is a not loaded error.
func IsNotLoaded(err error) bool {
	if err == nil {
		return false
	}
	var e *NotLoadedError
	return errors.As(err, &e)
}

// ConstraintError returns when trying to create/update one or more entities and
// one or more of their constraints failed. For example, violation of edge or
// field uniqueness.
type ConstraintError struct {
	msg  string
	wrap error
}

// Error implements the error interface.
func (e ConstraintError) Error() string {
	return "ent: constraint failed: " + e.msg
}

// Unwrap implements the errors.Wrapper interface.
func (e *ConstraintError) Unwrap() error {
	return e.wrap
}

// IsConstraintError returns a boolean indicating whether the error is a constraint failure.
func IsConstraintError(err error) bool {
	if err == nil {
		return false
	}
	var e *ConstraintError
	return errors.As(err, &e)
}

// selector embedded by the different Select/GroupBy builders.
type selector struct {
	label string
	flds  *[]string
	fns   []AggregateFunc
	scan  func(context.Context, any) error
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// withHooks invokes the builder operation with the given hooks, if any.
func withHooks[V Value, M any, PM interface {
	*M
	Mutation
}](ctx context.Context, exec func(context.Context) (V, error), mutation PM, hooks []Hook) (value V, err error) {
	if len(hooks) == 0 {
		return exec(ctx)
	}
	var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
		mutationT, ok := any(m).(PM)
		if !ok {
			return nil, fmt.Errorf("unexpected mutation type %T", m)
		}
		// Set the mutation to the builder.
		*mutation = *mutationT
		return exec(ctx)
	})
	for i := len(hooks) - 1; i >= 0; i-- {
		if hooks[i] == nil {
			return value, fmt.Errorf("ent: uninitialized hook (forgotten import ent/runtime?)")
		}
		mut = hooks[i](mut)
	}
	v, err := mut.Mutate(ctx, mutation)
	if err != nil {
		return value, err
	}
	nv, ok := v.(V)
	if !ok {
		return value, fmt.Errorf("unexpected node type %T returned from %T", v, mutation)
	}
	return nv, nil
}

// setContextOp returns a new context with the given QueryContext attached (including its op) in case it does not exist.
func setContextOp(ctx context.Context, qc *QueryContext, op string) context.Context {
	if ent.QueryFromContext(ctx) == nil {
		qc.Op = op
		ctx = ent.NewQueryContext(ctx, qc)
	}
	return ctx
}

func querierAll[V Value, Q interface {
	gremlinAll(context.Context, ...queryHook) (V, error)
}]() Querier {
	return QuerierFunc(func(ctx context.Context, q Query) (Value, error) {
		query, ok := q.(Q)
		if !ok {
			return nil, fmt.Errorf("unexpected query type %T", q)
		}
		return query.gremlinAll(ctx)
	})
}

func querierCount[Q interface {
	gremlinCount(context.Context) (int, error)
}]() Querier {
	return QuerierFunc(func(ctx context.Context, q Query) (Value, error) {
		query, ok := q.(Q)
		if !ok {
			return nil, fmt.Errorf("unexpected query type %T", q)
		}
		return query.gremlinCount(ctx)
	})
}

func withInterceptors[V Value](ctx context.Context, q Query, qr Querier, inters []Interceptor) (v V, err error) {
	for i := len(inters) - 1; i >= 0; i-- {
		qr = inters[i].Intercept(qr)
	}
	rv, err := qr.Query(ctx, q)
	if err != nil {
		return v, err
	}
	vt, ok := rv.(V)
	if !ok {
		return v, fmt.Errorf("unexpected type %T returned from %T. expected type: %T", vt, q, v)
	}
	return vt, nil
}

func scanWithInterceptors[Q1 ent.Query, Q2 interface {
	gremlinScan(context.Context, Q1, any) error
}](ctx context.Context, rootQuery Q1, selectOrGroup Q2, inters []Interceptor, v any) error {
	rv := reflect.ValueOf(v)
	var qr Querier = QuerierFunc(func(ctx context.Context, q Query) (Value, error) {
		query, ok := q.(Q1)
		if !ok {
			return nil, fmt.Errorf("unexpected query type %T", q)
		}
		if err := selectOrGroup.gremlinScan(ctx, query, v); err != nil {
			return nil, err
		}
		if k := rv.Kind(); k == reflect.Pointer && rv.Elem().CanInterface() {
			return rv.Elem().Interface(), nil
		}
		return v, nil
	})
	for i := len(inters) - 1; i >= 0; i-- {
		qr = inters[i].Intercept(qr)
	}
	vv, err := qr.Query(ctx, rootQuery)
	if err != nil {
		return err
	}
	switch rv2 := reflect.ValueOf(vv); {
	case rv.IsNil(), rv2.IsNil(), rv.Kind() != reflect.Pointer:
	case rv.Type() == rv2.Type():
		rv.Elem().Set(rv2.Elem())
	case rv.Elem().Type() == rv2.Type():
		rv.Elem().Set(rv2)
	}
	return nil
}

// Code implements the dsl.Node interface.
func (e ConstraintError) Code() (string, []any) {
	return strconv.Quote(e.prefix() + e.msg), nil
}

func (e *ConstraintError) UnmarshalGraphson(b []byte) error {
	var v [1]*string
	if err := graphson.Unmarshal(b, &v); err != nil {
		return err
	}
	if v[0] == nil {
		return fmt.Errorf("ent: missing string value")
	}
	if !strings.HasPrefix(*v[0], e.prefix()) {
		return fmt.Errorf("ent: invalid string for error: %s", *v[0])
	}
	e.msg = strings.TrimPrefix(*v[0], e.prefix())
	return nil
}

// prefix returns the prefix used for gremlin constants.
func (ConstraintError) prefix() string { return "Error: " }

// NewErrUniqueField creates a constraint error for unique fields.
func NewErrUniqueField(label, field string, v any) *ConstraintError {
	return &ConstraintError{msg: fmt.Sprintf("field %s.%s with value: %#v", label, field, v)}
}

// NewErrUniqueEdge creates a constraint error for unique edges.
func NewErrUniqueEdge(label, edge, id string) *ConstraintError {
	return &ConstraintError{msg: fmt.Sprintf("edge %s.%s with id: %#v", label, edge, id)}
}

// isConstantError indicates if the given response holds a gremlin constant containing an error.
func isConstantError(r *gremlin.Response) (*ConstraintError, bool) {
	e := &ConstraintError{}
	if err := graphson.Unmarshal(r.Result.Data, e); err != nil {
		return nil, false
	}
	return e, true
}

// queryHook describes an internal hook for the different gremlinAll methods.
type queryHook func(context.Context)