// 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"
	"fmt"

	"github.com/facebook/ent/dialect/sql"
	"github.com/facebook/ent/dialect/sql/sqlgraph"
	"github.com/facebook/ent/entc/integration/ent/predicate"
	"github.com/facebook/ent/entc/integration/ent/schema"
	"github.com/facebook/ent/entc/integration/ent/task"
	"github.com/facebook/ent/schema/field"
)

// TaskUpdate is the builder for updating Task entities.
type TaskUpdate struct {
	config
	hooks    []Hook
	mutation *TaskMutation
}

// Where adds a new predicate for the builder.
func (tu *TaskUpdate) Where(ps ...predicate.Task) *TaskUpdate {
	tu.mutation.predicates = append(tu.mutation.predicates, ps...)
	return tu
}

// SetPriority sets the priority field.
func (tu *TaskUpdate) SetPriority(s schema.Priority) *TaskUpdate {
	tu.mutation.ResetPriority()
	tu.mutation.SetPriority(s)
	return tu
}

// SetNillablePriority sets the priority field if the given value is not nil.
func (tu *TaskUpdate) SetNillablePriority(s *schema.Priority) *TaskUpdate {
	if s != nil {
		tu.SetPriority(*s)
	}
	return tu
}

// AddPriority adds s to priority.
func (tu *TaskUpdate) AddPriority(s schema.Priority) *TaskUpdate {
	tu.mutation.AddPriority(s)
	return tu
}

// Mutation returns the TaskMutation object of the builder.
func (tu *TaskUpdate) Mutation() *TaskMutation {
	return tu.mutation
}

// Save executes the query and returns the number of nodes affected by the update operation.
func (tu *TaskUpdate) Save(ctx context.Context) (int, error) {
	var (
		err      error
		affected int
	)
	if len(tu.hooks) == 0 {
		if err = tu.check(); err != nil {
			return 0, err
		}
		affected, err = tu.sqlSave(ctx)
	} else {
		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
			mutation, ok := m.(*TaskMutation)
			if !ok {
				return nil, fmt.Errorf("unexpected mutation type %T", m)
			}
			if err = tu.check(); err != nil {
				return 0, err
			}
			tu.mutation = mutation
			affected, err = tu.sqlSave(ctx)
			mutation.done = true
			return affected, err
		})
		for i := len(tu.hooks) - 1; i >= 0; i-- {
			mut = tu.hooks[i](mut)
		}
		if _, err := mut.Mutate(ctx, tu.mutation); err != nil {
			return 0, err
		}
	}
	return affected, err
}

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

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

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

// check runs all checks and user-defined validators on the builder.
func (tu *TaskUpdate) check() error {
	if v, ok := tu.mutation.Priority(); ok {
		if err := task.PriorityValidator(int(v)); err != nil {
			return &ValidationError{Name: "priority", err: fmt.Errorf("ent: validator failed for field \"priority\": %w", err)}
		}
	}
	return nil
}

func (tu *TaskUpdate) sqlSave(ctx context.Context) (n int, err error) {
	_spec := &sqlgraph.UpdateSpec{
		Node: &sqlgraph.NodeSpec{
			Table:   task.Table,
			Columns: task.Columns,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: task.FieldID,
			},
		},
	}
	if ps := tu.mutation.predicates; len(ps) > 0 {
		_spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	if value, ok := tu.mutation.Priority(); ok {
		_spec.Fields.Set = append(_spec.Fields.Set, &sqlgraph.FieldSpec{
			Type:   field.TypeInt,
			Value:  value,
			Column: task.FieldPriority,
		})
	}
	if value, ok := tu.mutation.AddedPriority(); ok {
		_spec.Fields.Add = append(_spec.Fields.Add, &sqlgraph.FieldSpec{
			Type:   field.TypeInt,
			Value:  value,
			Column: task.FieldPriority,
		})
	}
	if n, err = sqlgraph.UpdateNodes(ctx, tu.driver, _spec); err != nil {
		if _, ok := err.(*sqlgraph.NotFoundError); ok {
			err = &NotFoundError{task.Label}
		} else if cerr, ok := isSQLConstraintError(err); ok {
			err = cerr
		}
		return 0, err
	}
	return n, nil
}

// TaskUpdateOne is the builder for updating a single Task entity.
type TaskUpdateOne struct {
	config
	hooks    []Hook
	mutation *TaskMutation
}

// SetPriority sets the priority field.
func (tuo *TaskUpdateOne) SetPriority(s schema.Priority) *TaskUpdateOne {
	tuo.mutation.ResetPriority()
	tuo.mutation.SetPriority(s)
	return tuo
}

// SetNillablePriority sets the priority field if the given value is not nil.
func (tuo *TaskUpdateOne) SetNillablePriority(s *schema.Priority) *TaskUpdateOne {
	if s != nil {
		tuo.SetPriority(*s)
	}
	return tuo
}

// AddPriority adds s to priority.
func (tuo *TaskUpdateOne) AddPriority(s schema.Priority) *TaskUpdateOne {
	tuo.mutation.AddPriority(s)
	return tuo
}

// Mutation returns the TaskMutation object of the builder.
func (tuo *TaskUpdateOne) Mutation() *TaskMutation {
	return tuo.mutation
}

// Save executes the query and returns the updated entity.
func (tuo *TaskUpdateOne) Save(ctx context.Context) (*Task, error) {
	var (
		err  error
		node *Task
	)
	if len(tuo.hooks) == 0 {
		if err = tuo.check(); err != nil {
			return nil, err
		}
		node, err = tuo.sqlSave(ctx)
	} else {
		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
			mutation, ok := m.(*TaskMutation)
			if !ok {
				return nil, fmt.Errorf("unexpected mutation type %T", m)
			}
			if err = tuo.check(); err != nil {
				return nil, err
			}
			tuo.mutation = mutation
			node, err = tuo.sqlSave(ctx)
			mutation.done = true
			return node, err
		})
		for i := len(tuo.hooks) - 1; i >= 0; i-- {
			mut = tuo.hooks[i](mut)
		}
		if _, err := mut.Mutate(ctx, tuo.mutation); err != nil {
			return nil, err
		}
	}
	return node, err
}

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

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

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

// check runs all checks and user-defined validators on the builder.
func (tuo *TaskUpdateOne) check() error {
	if v, ok := tuo.mutation.Priority(); ok {
		if err := task.PriorityValidator(int(v)); err != nil {
			return &ValidationError{Name: "priority", err: fmt.Errorf("ent: validator failed for field \"priority\": %w", err)}
		}
	}
	return nil
}

func (tuo *TaskUpdateOne) sqlSave(ctx context.Context) (_node *Task, err error) {
	_spec := &sqlgraph.UpdateSpec{
		Node: &sqlgraph.NodeSpec{
			Table:   task.Table,
			Columns: task.Columns,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: task.FieldID,
			},
		},
	}
	id, ok := tuo.mutation.ID()
	if !ok {
		return nil, &ValidationError{Name: "ID", err: fmt.Errorf("missing Task.ID for update")}
	}
	_spec.Node.ID.Value = id
	if value, ok := tuo.mutation.Priority(); ok {
		_spec.Fields.Set = append(_spec.Fields.Set, &sqlgraph.FieldSpec{
			Type:   field.TypeInt,
			Value:  value,
			Column: task.FieldPriority,
		})
	}
	if value, ok := tuo.mutation.AddedPriority(); ok {
		_spec.Fields.Add = append(_spec.Fields.Add, &sqlgraph.FieldSpec{
			Type:   field.TypeInt,
			Value:  value,
			Column: task.FieldPriority,
		})
	}
	_node = &Task{config: tuo.config}
	_spec.Assign = _node.assignValues
	_spec.ScanValues = _node.scanValues()
	if err = sqlgraph.UpdateNode(ctx, tuo.driver, _spec); err != nil {
		if _, ok := err.(*sqlgraph.NotFoundError); ok {
			err = &NotFoundError{task.Label}
		} else if cerr, ok := isSQLConstraintError(err); ok {
			err = cerr
		}
		return nil, err
	}
	return _node, nil
}
