// 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"

	"entgo.io/ent/dialect/gremlin"
	"entgo.io/ent/dialect/gremlin/graph/dsl"
	"entgo.io/ent/dialect/gremlin/graph/dsl/__"
	"entgo.io/ent/dialect/gremlin/graph/dsl/g"
	"entgo.io/ent/dialect/gremlin/graph/dsl/p"
	"entgo.io/ent/entc/integration/ent/schema"
	"entgo.io/ent/entc/integration/gremlin/ent/document"
	"entgo.io/ent/entc/integration/gremlin/ent/predicate"
)

// DocumentUpdate is the builder for updating Document entities.
type DocumentUpdate struct {
	config
	hooks    []Hook
	mutation *DocumentMutation
}

// Where appends a list predicates to the DocumentUpdate builder.
func (_u *DocumentUpdate) Where(ps ...predicate.Document) *DocumentUpdate {
	_u.mutation.Where(ps...)
	return _u
}

// SetName sets the "name" field.
func (_u *DocumentUpdate) SetName(v string) *DocumentUpdate {
	_u.mutation.SetName(v)
	return _u
}

// SetNillableName sets the "name" field if the given value is not nil.
func (_u *DocumentUpdate) SetNillableName(v *string) *DocumentUpdate {
	if v != nil {
		_u.SetName(*v)
	}
	return _u
}

// Mutation returns the DocumentMutation object of the builder.
func (_u *DocumentUpdate) Mutation() *DocumentMutation {
	return _u.mutation
}

// Save executes the query and returns the number of nodes affected by the update operation.
func (_u *DocumentUpdate) Save(ctx context.Context) (int, error) {
	return withHooks(ctx, _u.gremlinSave, _u.mutation, _u.hooks)
}

// SaveX is like Save, but panics if an error occurs.
func (_u *DocumentUpdate) SaveX(ctx context.Context) int {
	affected, err := _u.Save(ctx)
	if err != nil {
		panic(err)
	}
	return affected
}

// Exec executes the query.
func (_u *DocumentUpdate) Exec(ctx context.Context) error {
	_, err := _u.Save(ctx)
	return err
}

// ExecX is like Exec, but panics if an error occurs.
func (_u *DocumentUpdate) ExecX(ctx context.Context) {
	if err := _u.Exec(ctx); err != nil {
		panic(err)
	}
}

func (_u *DocumentUpdate) gremlinSave(ctx context.Context) (int, error) {
	res := &gremlin.Response{}
	query, bindings := _u.gremlin().Query()
	if err := _u.driver.Exec(ctx, query, bindings, res); err != nil {
		return 0, err
	}
	if err, ok := isConstantError(res); ok {
		return 0, err
	}
	_u.mutation.done = true
	return res.ReadInt()
}

func (_u *DocumentUpdate) gremlin() *dsl.Traversal {
	type constraint struct {
		pred *dsl.Traversal // constraint predicate.
		test *dsl.Traversal // test matches and its constant.
	}
	constraints := make([]*constraint, 0, 1)
	v := g.V().HasLabel(document.Label)
	for _, p := range _u.mutation.Predicates() {
		p(v)
	}
	var (
		rv = v.Clone()
		_  = rv

		trs []*dsl.Traversal
	)
	if value, ok := _u.mutation.Name(); ok {
		constraints = append(constraints, &constraint{
			pred: g.V().Has(document.Label, document.FieldName, value).Count(),
			test: __.Is(p.NEQ(0)).Constant(NewErrUniqueField(document.Label, document.FieldName, value)),
		})
		v.Property(dsl.Single, document.FieldName, value)
	}
	var properties []any
	if len(properties) > 0 {
		v.SideEffect(__.Properties(properties...).Drop())
	}
	v.Count()
	if len(constraints) > 0 {
		constraints = append(constraints, &constraint{
			pred: rv.Count(),
			test: __.Is(p.GT(1)).Constant(&ConstraintError{msg: "update traversal contains more than one vertex"}),
		})
		v = constraints[0].pred.Coalesce(constraints[0].test, v)
		for _, cr := range constraints[1:] {
			v = cr.pred.Coalesce(cr.test, v)
		}
	}
	trs = append(trs, v)
	return dsl.Join(trs...)
}

// DocumentUpdateOne is the builder for updating a single Document entity.
type DocumentUpdateOne struct {
	config
	fields   []string
	hooks    []Hook
	mutation *DocumentMutation
}

// SetName sets the "name" field.
func (_u *DocumentUpdateOne) SetName(v string) *DocumentUpdateOne {
	_u.mutation.SetName(v)
	return _u
}

// SetNillableName sets the "name" field if the given value is not nil.
func (_u *DocumentUpdateOne) SetNillableName(v *string) *DocumentUpdateOne {
	if v != nil {
		_u.SetName(*v)
	}
	return _u
}

// SetAttachment sets the "attachment" field.
func (_u *DocumentUpdateOne) SetAttachment(v []byte) *DocumentUpdateOne {
	_u.mutation.SetAttachment(v)
	return _u
}

// SetNillableAttachment sets the "attachment" field if the given value is not nil.
func (_u *DocumentUpdateOne) SetNillableAttachment(v *[]byte) *DocumentUpdateOne {
	if v != nil {
		_u.SetAttachment(*v)
	}
	return _u
}

// SetMetadata sets the "metadata" field.
func (_u *DocumentUpdateOne) SetMetadata(v []byte) *DocumentUpdateOne {
	_u.mutation.SetMetadata(v)
	return _u
}

// SetNillableMetadata sets the "metadata" field if the given value is not nil.
func (_u *DocumentUpdateOne) SetNillableMetadata(v *[]byte) *DocumentUpdateOne {
	if v != nil {
		_u.SetMetadata(*v)
	}
	return _u
}

// ClearMetadata clears the value of the "metadata" field.
func (_u *DocumentUpdateOne) ClearMetadata() *DocumentUpdateOne {
	_u.mutation.ClearMetadata()
	return _u
}

// SetPayload sets the "payload" field.
func (_u *DocumentUpdateOne) SetPayload(v *schema.DocPayload) *DocumentUpdateOne {
	_u.mutation.SetPayload(v)
	return _u
}

// ClearPayload clears the value of the "payload" field.
func (_u *DocumentUpdateOne) ClearPayload() *DocumentUpdateOne {
	_u.mutation.ClearPayload()
	return _u
}

// SetDescription sets the "description" field.
func (_u *DocumentUpdateOne) SetDescription(v string) *DocumentUpdateOne {
	_u.mutation.SetDescription(v)
	return _u
}

// SetNillableDescription sets the "description" field if the given value is not nil.
func (_u *DocumentUpdateOne) SetNillableDescription(v *string) *DocumentUpdateOne {
	if v != nil {
		_u.SetDescription(*v)
	}
	return _u
}

// ClearDescription clears the value of the "description" field.
func (_u *DocumentUpdateOne) ClearDescription() *DocumentUpdateOne {
	_u.mutation.ClearDescription()
	return _u
}

// Mutation returns the DocumentMutation object of the builder.
func (_u *DocumentUpdateOne) Mutation() *DocumentMutation {
	return _u.mutation
}

// Where appends a list predicates to the DocumentUpdate builder.
func (_u *DocumentUpdateOne) Where(ps ...predicate.Document) *DocumentUpdateOne {
	_u.mutation.Where(ps...)
	return _u
}

// Select allows selecting one or more fields (columns) of the returned entity.
// The default is selecting all fields defined in the entity schema.
func (_u *DocumentUpdateOne) Select(field string, fields ...string) *DocumentUpdateOne {
	_u.fields = append([]string{field}, fields...)
	return _u
}

// Save executes the query and returns the updated Document entity.
func (_u *DocumentUpdateOne) Save(ctx context.Context) (*Document, error) {
	return withHooks(ctx, _u.gremlinSave, _u.mutation, _u.hooks)
}

// SaveX is like Save, but panics if an error occurs.
func (_u *DocumentUpdateOne) SaveX(ctx context.Context) *Document {
	node, err := _u.Save(ctx)
	if err != nil {
		panic(err)
	}
	return node
}

// Exec executes the query on the entity.
func (_u *DocumentUpdateOne) Exec(ctx context.Context) error {
	_, err := _u.Save(ctx)
	return err
}

// ExecX is like Exec, but panics if an error occurs.
func (_u *DocumentUpdateOne) ExecX(ctx context.Context) {
	if err := _u.Exec(ctx); err != nil {
		panic(err)
	}
}

func (_u *DocumentUpdateOne) gremlinSave(ctx context.Context) (*Document, error) {
	res := &gremlin.Response{}
	id, ok := _u.mutation.ID()
	if !ok {
		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "Document.id" for update`)}
	}
	query, bindings := _u.gremlin(id).Query()
	if err := _u.driver.Exec(ctx, query, bindings, res); err != nil {
		return nil, err
	}
	if err, ok := isConstantError(res); ok {
		return nil, err
	}
	_u.mutation.done = true
	_m := &Document{config: _u.config}
	if err := _m.FromResponse(res); err != nil {
		return nil, err
	}
	return _m, nil
}

func (_u *DocumentUpdateOne) gremlin(id string) *dsl.Traversal {
	type constraint struct {
		pred *dsl.Traversal // constraint predicate.
		test *dsl.Traversal // test matches and its constant.
	}
	constraints := make([]*constraint, 0, 1)
	v := g.V(id)
	var (
		rv = v.Clone()
		_  = rv

		trs []*dsl.Traversal
	)
	if value, ok := _u.mutation.Name(); ok {
		constraints = append(constraints, &constraint{
			pred: g.V().Has(document.Label, document.FieldName, value).Count(),
			test: __.Is(p.NEQ(0)).Constant(NewErrUniqueField(document.Label, document.FieldName, value)),
		})
		v.Property(dsl.Single, document.FieldName, value)
	}
	var properties []any
	if len(properties) > 0 {
		v.SideEffect(__.Properties(properties...).Drop())
	}
	if len(_u.fields) > 0 {
		fields := make([]any, 0, len(_u.fields)+1)
		fields = append(fields, true)
		for _, f := range _u.fields {
			fields = append(fields, f)
		}
		v.ValueMap(fields...)
	} else {
		v.ValueMap(true)
	}
	if len(constraints) > 0 {
		v = constraints[0].pred.Coalesce(constraints[0].test, v)
		for _, cr := range constraints[1:] {
			v = cr.pred.Coalesce(cr.test, v)
		}
	}
	trs = append(trs, v)
	return dsl.Join(trs...)
}