// 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 friendship

import (
	"context"
	"fmt"
	"time"

	"entgo.io/ent"
	"entgo.io/ent/dialect/sql"
	"entgo.io/ent/entc/integration/multischema/versioned/predicate"
)

// Mutation represents an operation that mutates the Friendship nodes in the graph.
type Mutation struct {
	op            ent.Op
	typ           string
	weight        *int
	addweight     *int
	created_at    *time.Time
	clearedFields map[string]struct{}
	user          *int
	cleareduser   bool
	friend        *int
	clearedfriend bool
	predicates    []predicate.Friendship
}

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

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

// SetWeight sets the "weight" field.
func (m *Mutation) SetWeight(i int) {
	m.weight = &i
	m.addweight = nil
}

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

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

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

// ResetWeight resets all changes to the "weight" field.
func (m *Mutation) ResetWeight() {
	m.weight = nil
	m.addweight = nil
}

// SetCreatedAt sets the "created_at" field.
func (m *Mutation) SetCreatedAt(t time.Time) {
	m.created_at = &t
}

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

// ResetCreatedAt resets all changes to the "created_at" field.
func (m *Mutation) ResetCreatedAt() {
	m.created_at = nil
}

// SetUserID sets the "user_id" field.
func (m *Mutation) SetUserID(i int) {
	m.user = &i
}

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

// ResetUserID resets all changes to the "user_id" field.
func (m *Mutation) ResetUserID() {
	m.user = nil
}

// SetFriendID sets the "friend_id" field.
func (m *Mutation) SetFriendID(i int) {
	m.friend = &i
}

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

// ResetFriendID resets all changes to the "friend_id" field.
func (m *Mutation) ResetFriendID() {
	m.friend = nil
}

// ClearUser clears the "user" edge to the User entity.
func (m *Mutation) ClearUser() {
	m.cleareduser = true
	m.clearedFields[FieldUserID] = struct{}{}
}

// UserCleared reports if the "user" edge to the User entity was cleared.
func (m *Mutation) UserCleared() bool {
	return m.cleareduser
}

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

// ResetUser resets all changes to the "user" edge.
func (m *Mutation) ResetUser() {
	m.user = nil
	m.cleareduser = false
}

// ClearFriend clears the "friend" edge to the User entity.
func (m *Mutation) ClearFriend() {
	m.clearedfriend = true
	m.clearedFields[FieldFriendID] = struct{}{}
}

// FriendCleared reports if the "friend" edge to the User entity was cleared.
func (m *Mutation) FriendCleared() bool {
	return m.clearedfriend
}

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

// ResetFriend resets all changes to the "friend" edge.
func (m *Mutation) ResetFriend() {
	m.friend = nil
	m.clearedfriend = false
}

// Where appends a list predicates to the Mutation builder.
func (m *Mutation) Where(ps ...predicate.Friendship) {
	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.Friendship, 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 (Friendship).
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, 4)
	if m.weight != nil {
		fields = append(fields, FieldWeight)
	}
	if m.created_at != nil {
		fields = append(fields, FieldCreatedAt)
	}
	if m.user != nil {
		fields = append(fields, FieldUserID)
	}
	if m.friend != nil {
		fields = append(fields, FieldFriendID)
	}
	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 FieldWeight:
		return m.Weight()
	case FieldCreatedAt:
		return m.CreatedAt()
	case FieldUserID:
		return m.UserID()
	case FieldFriendID:
		return m.FriendID()
	}
	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 Friendship 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 FieldWeight:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetWeight(v)
		return nil
	case FieldCreatedAt:
		v, ok := value.(time.Time)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetCreatedAt(v)
		return nil
	case FieldUserID:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetUserID(v)
		return nil
	case FieldFriendID:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.SetFriendID(v)
		return nil
	}
	return fmt.Errorf("unknown Friendship 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.addweight != nil {
		fields = append(fields, FieldWeight)
	}
	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 FieldWeight:
		return m.AddedWeight()
	}
	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 FieldWeight:
		v, ok := value.(int)
		if !ok {
			return fmt.Errorf("unexpected type %T for field %s", value, name)
		}
		m.AddWeight(v)
		return nil
	}
	return fmt.Errorf("unknown Friendship numeric field %s", name)
}

// ClearedFields returns all nullable fields that were cleared during this
// mutation.
func (m *Mutation) ClearedFields() []string {
	return nil
}

// 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 {
	return fmt.Errorf("unknown Friendship 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 FieldWeight:
		m.ResetWeight()
		return nil
	case FieldCreatedAt:
		m.ResetCreatedAt()
		return nil
	case FieldUserID:
		m.ResetUserID()
		return nil
	case FieldFriendID:
		m.ResetFriendID()
		return nil
	}
	return fmt.Errorf("unknown Friendship 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.user != nil {
		edges = append(edges, EdgeUser)
	}
	if m.friend != nil {
		edges = append(edges, EdgeFriend)
	}
	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 EdgeUser:
		if id := m.user; id != nil {
			return []ent.Value{*id}
		}
	case EdgeFriend:
		if id := m.friend; 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.cleareduser {
		edges = append(edges, EdgeUser)
	}
	if m.clearedfriend {
		edges = append(edges, EdgeFriend)
	}
	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 EdgeUser:
		return m.cleareduser
	case EdgeFriend:
		return m.clearedfriend
	}
	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 EdgeUser:
		m.ClearUser()
		return nil
	case EdgeFriend:
		m.ClearFriend()
		return nil
	}
	return fmt.Errorf("unknown Friendship 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 EdgeUser:
		m.ResetUser()
		return nil
	case EdgeFriend:
		m.ResetFriend()
		return nil
	}
	return fmt.Errorf("unknown Friendship edge %s", name)
}