// 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 node

import (
	"context"
	"fmt"

	"entgo.io/ent"
	"entgo.io/ent/dialect/sql"
	"entgo.io/ent/examples/o2orecur/ent/predicate"
)

// Mutation represents an operation that mutates the Node nodes in the graph.
type Mutation struct {
	op            ent.Op
	typ           string
	value         *int
	addvalue      *int
	clearedFields map[string]struct{}
	prev          *int
	clearedprev   bool
	next          *int
	clearednext   bool
	predicates    []predicate.Node
}

// NewMutation creates a new Mutation for the Node entity.
func NewMutation(op ent.Op) *Mutation {
	return &Mutation{
		op:            op,
		typ:           "Node",
		clearedFields: make(map[string]struct{}),
	}
}

// Predicates returns the list of predicates set on the mutation.
func (m *Mutation) Predicates() []predicate.Node {
	return m.predicates
}

// SetValue sets the "value" field.
func (m *Mutation) SetValue(i int) {
	m.value = &i
	m.addvalue = nil
}

// Value returns the value of the "value" field in the mutation.
func (m *Mutation) Value() (r int, exists bool) {
	v := m.value
	if v == nil {
		return
	}
	return *v, true
}

// AddValue adds i to the "value" field.
func (m *Mutation) AddValue(i int) {
	if m.addvalue != nil {
		*m.addvalue += i
	} else {
		m.addvalue = &i
	}
}

// AddedValue returns the value that was added to the "value" field in this mutation.
func (m *Mutation) AddedValue() (r int, exists bool) {
	v := m.addvalue
	if v == nil {
		return
	}
	return *v, true
}

// ResetValue resets all changes to the "value" field.
func (m *Mutation) ResetValue() {
	m.value = nil
	m.addvalue = nil
}

// SetPrevID sets the "prev_id" field.
func (m *Mutation) SetPrevID(i int) {
	m.prev = &i
}

// PrevID returns the value of the "prev_id" field in the mutation.
func (m *Mutation) PrevID() (r int, exists bool) {
	v := m.prev
	if v == nil {
		return
	}
	return *v, true
}

// ClearPrevID clears the value of the "prev_id" field.
func (m *Mutation) ClearPrevID() {
	m.prev = nil
	m.clearedFields[FieldPrevID] = struct{}{}
}

// PrevIDCleared returns if the "prev_id" field was cleared in this mutation.
func (m *Mutation) PrevIDCleared() bool {
	_, ok := m.clearedFields[FieldPrevID]
	return ok
}

// ResetPrevID resets all changes to the "prev_id" field.
func (m *Mutation) ResetPrevID() {
	m.prev = nil
	delete(m.clearedFields, FieldPrevID)
}

// ClearPrev clears the "prev" edge to the Node entity.
func (m *Mutation) ClearPrev() {
	m.clearedprev = true
	m.clearedFields[FieldPrevID] = struct{}{}
}

// PrevCleared reports if the "prev" edge to the Node entity was cleared.
func (m *Mutation) PrevCleared() bool {
	return m.PrevIDCleared() || m.clearedprev
}

// PrevIDs returns the "prev" edge IDs in the mutation.
// Note that IDs always returns len(IDs) <= 1 for unique edges, and you should use
// PrevID instead. It exists only for internal usage by the builders.
func (m *Mutation) PrevIDs() (ids []int) {
	if id := m.prev; id != nil {
		ids = append(ids, *id)
	}
	return
}

// ResetPrev resets all changes to the "prev" edge.
func (m *Mutation) ResetPrev() {
	m.prev = nil
	m.clearedprev = false
}

// SetNextID sets the "next" edge to the Node entity by id.
func (m *Mutation) SetNextID(id int) {
	m.next = &id
}

// ClearNext clears the "next" edge to the Node entity.
func (m *Mutation) ClearNext() {
	m.clearednext = true
}

// NextCleared reports if the "next" edge to the Node entity was cleared.
func (m *Mutation) NextCleared() bool {
	return m.clearednext
}

// NextID returns the "next" edge ID in the mutation.
func (m *Mutation) NextID() (id int, exists bool) {
	if m.next != nil {
		return *m.next, true
	}
	return
}

// NextIDs returns the "next" edge IDs in the mutation.
// Note that IDs always returns len(IDs) <= 1 for unique edges, and you should use
// NextID instead. It exists only for internal usage by the builders.
func (m *Mutation) NextIDs() (ids []int) {
	if id := m.next; id != nil {
		ids = append(ids, *id)
	}
	return
}

// ResetNext resets all changes to the "next" edge.
func (m *Mutation) ResetNext() {
	m.next = nil
	m.clearednext = false
}

// Where appends a list predicates to the Mutation builder.
func (m *Mutation) Where(ps ...predicate.Node) {
	m.predicates = append(m.predicates, ps...)
}

// WhereP appends storage-level predicates to the Mutation builder. Using this method,
// users can use type-assertion to append predicates that do not depend on any generated package.
func (m *Mutation) WhereP(ps ...func(*sql.Selector)) {
	p := make([]predicate.Node, len(ps))
	for i := range ps {
		p[i] = ps[i]
	}
	m.Where(p...)
}

// Op returns the operation name.
func (m *Mutation) Op() ent.Op {
	return m.op
}

// SetOp allows setting the mutation operation.
func (m *Mutation) SetOp(op ent.Op) {
	m.op = op
}

// Type returns the node type of this mutation (Node).
func (m *Mutation) Type() string {
	return m.typ
}

// Fields returns all fields that were changed during this mutation. Note that in
// order to get all numeric fields that were incremented/decremented, call
// AddedFields().
func (m *Mutation) Fields() []string {
	fields := make([]string, 0, 2)
	if m.value != nil {
		fields = append(fields, FieldValue)
	}
	if m.prev != nil {
		fields = append(fields, FieldPrevID)
	}
	return fields
}

// Field returns the value of a field with the given name. The second boolean
// return value indicates that this field was not set, or was not defined in the
// schema.
func (m *Mutation) Field(name string) (ent.Value, bool) {
	switch name {
	case FieldValue:
		return m.Value()
	case FieldPrevID:
		return m.PrevID()
	}
	return nil, false
}

// 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 *Mutation) OldField(ctx context.Context, name string) (ent.Value, error) {
	return nil, fmt.Errorf("unknown Node field %s", name)
}

// SetField sets the value of a field with the given name. It returns an error if
// the field is not defined in the schema, or if the type mismatched the field
// type.
func (m *Mutation) SetField(name string, value ent.Value) error {
	switch name {
	case FieldValue:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetValue(v)
		return nil
	case FieldPrevID:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetPrevID(v)
		return nil
	}
	return fmt.Errorf("unknown Node field %s", name)
}

// AddedFields returns all numeric fields that were incremented/decremented during
// this mutation.
func (m *Mutation) AddedFields() []string {
	var fields []string
	if m.addvalue != nil {
		fields = append(fields, FieldValue)
	}
	return fields
}

// AddedField returns the numeric value that was incremented/decremented on a field
// with the given name. The second boolean return value indicates that this field
// was not set, or was not defined in the schema.
func (m *Mutation) AddedField(name string) (ent.Value, bool) {
	switch name {
	case FieldValue:
		return m.AddedValue()
	}
	return nil, false
}

// AddField adds the value to the field with the given name. It returns an error if
// the field is not defined in the schema, or if the type mismatched the field
// type.
func (m *Mutation) AddField(name string, value ent.Value) error {
	switch name {
	case FieldValue:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.AddValue(v)
		return nil
	}
	return fmt.Errorf("unknown Node numeric field %s", name)
}

// ClearedFields returns all nullable fields that were cleared during this
// mutation.
func (m *Mutation) ClearedFields() []string {
	var fields []string
	if m.FieldCleared(FieldPrevID) {
		fields = append(fields, FieldPrevID)
	}
	return fields
}

// FieldCleared returns a boolean indicating if a field with the given name was
// cleared in this mutation.
func (m *Mutation) FieldCleared(name string) bool {
	_, ok := m.clearedFields[name]
	return ok
}

// ClearField clears the value of the field with the given name. It returns an
// error if the field is not defined in the schema.
func (m *Mutation) ClearField(name string) error {
	switch name {
	case FieldPrevID:
		m.ClearPrevID()
		return nil
	}
	return fmt.Errorf("unknown Node nullable field %s", name)
}

// ResetField resets all changes in the mutation for the field with the given name.
// It returns an error if the field is not defined in the schema.
func (m *Mutation) ResetField(name string) error {
	switch name {
	case FieldValue:
		m.ResetValue()
		return nil
	case FieldPrevID:
		m.ResetPrevID()
		return nil
	}
	return fmt.Errorf("unknown Node field %s", name)
}

// AddedEdges returns all edge names that were set/added in this mutation.
func (m *Mutation) AddedEdges() []string {
	edges := make([]string, 0, 2)
	if m.prev != nil {
		edges = append(edges, EdgePrev)
	}
	if m.next != nil {
		edges = append(edges, EdgeNext)
	}
	return edges
}

// AddedIDs returns all IDs (to other nodes) that were added for the given edge
// name in this mutation.
func (m *Mutation) AddedIDs(name string) []ent.Value {
	switch name {
	case EdgePrev:
		if id := m.prev; id != nil {
			return []ent.Value{*id}
		}
	case EdgeNext:
		if id := m.next; id != nil {
			return []ent.Value{*id}
		}
	}
	return nil
}

// RemovedEdges returns all edge names that were removed in this mutation.
func (m *Mutation) RemovedEdges() []string {
	edges := make([]string, 0, 2)
	return edges
}

// RemovedIDs returns all IDs (to other nodes) that were removed for the edge with
// the given name in this mutation.
func (m *Mutation) RemovedIDs(name string) []ent.Value {
	return nil
}

// ClearedEdges returns all edge names that were cleared in this mutation.
func (m *Mutation) ClearedEdges() []string {
	edges := make([]string, 0, 2)
	if m.clearedprev {
		edges = append(edges, EdgePrev)
	}
	if m.clearednext {
		edges = append(edges, EdgeNext)
	}
	return edges
}

// EdgeCleared returns a boolean which indicates if the edge with the given name
// was cleared in this mutation.
func (m *Mutation) EdgeCleared(name string) bool {
	switch name {
	case EdgePrev:
		return m.clearedprev
	case EdgeNext:
		return m.clearednext
	}
	return false
}

// ClearEdge clears the value of the edge with the given name. It returns an error
// if that edge is not defined in the schema.
func (m *Mutation) ClearEdge(name string) error {
	switch name {
	case EdgePrev:
		m.ClearPrev()
		return nil
	case EdgeNext:
		m.ClearNext()
		return nil
	}
	return fmt.Errorf("unknown Node unique edge %s", name)
}

// ResetEdge resets all changes to the edge with the given name in this mutation.
// It returns an error if the edge is not defined in the schema.
func (m *Mutation) ResetEdge(name string) error {
	switch name {
	case EdgePrev:
		m.ResetPrev()
		return nil
	case EdgeNext:
		m.ResetNext()
		return nil
	}
	return fmt.Errorf("unknown Node edge %s", name)
}