package clause

// Interface clause interface
type Interface interface {
	Name() string
	Build(Builder)
	MergeClause(*Clause)
}

// ClauseBuilder clause builder, allows to customize how to build clause
type ClauseBuilder func(Clause, Builder)

type Writer interface {
	WriteByte(byte) error
	WriteString(string) (int, error)
}

// Builder builder interface
type Builder interface {
	Writer
	WriteQuoted(field interface{})

package clause_test

import (
	"reflect"
	"strings"
	"sync"
	"testing"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils/tests"
)

var db, _ = gorm.Open(tests.DummyDialector{}, nil)

func checkBuildClauses(t *testing.T, clauses []clause.Interface, result string, vars []interface{}) {
	var (
		buildNames    []string
		buildNamesMap = map[string]bool{}

		message:    "Invalid argument given to the LIKE clause in the SQL expression.",
		statusCode: 400,
		cause:      err,
	}
}

func errQueryParseFailure(err error) *s3Error {
	return &s3Error{
		code:       "ParseSelectFailure",
		message:    err.Error(),
		statusCode: 400,
		cause:      err,
	}
}

func errQueryAnalysisFailure(err error) *s3Error {
	return &s3Error{

	FieldsWithDefaultDBValue  []*Field // fields with default value assigned by database
	Relationships             Relationships
	CreateClauses             []clause.Interface
	QueryClauses              []clause.Interface
	UpdateClauses             []clause.Interface
	DeleteClauses             []clause.Interface
	BeforeCreate, AfterCreate bool
	BeforeUpdate, AfterUpdate bool
	BeforeDelete, AfterDelete bool
	BeforeSave, AfterSave     bool

		statusCode: 400,
		cause:      err,
	}
}

func errParseExpectedWhenClause(err error) *s3Error {
	return &s3Error{
		code:       "ParseExpectedWhenClause",
		message:    "Did not find the expected WHEN clause in the SQL expression. CASE is not supported.",
		statusCode: 400,
		cause:      err,
	}
}

func errParseUnsupportedToken(err error) *s3Error {

package clause_test

import (
	"fmt"
	"sort"
	"strings"
	"testing"

	"gorm.io/gorm/clause"
)

func TestSet(t *testing.T) {
	results := []struct {
		Clauses []clause.Interface
		Result  string
		Vars    []interface{}
	}{
		{
			[]clause.Interface{
				clause.Update{},
				clause.Set([]clause.Assignment{{clause.PrimaryColumn, 1}}),
			},
			"UPDATE `users` SET `users`.`id`=?",
			[]interface{}{1},
		},

				"age": 18,
			},
			expect: clause.Values{
				Columns: []clause.Column{{Name: "age"}},
				Values:  [][]interface{}{{18}},
			},
		},
		{
			name: "Test convert float value",
			input: map[string]interface{}{
				"score": 99.5,
			},
			expect: clause.Values{
				Columns: []clause.Column{{Name: "score"}},
				Values:  [][]interface{}{{99.5}},
			},
		},
		{

func (limit Limit) MergeClause(clause *Clause) {
	clause.Name = ""

	if v, ok := clause.Expression.(Limit); ok {
		if (limit.Limit == nil || *limit.Limit == 0) && v.Limit != nil {
			limit.Limit = v.Limit
		}

		if limit.Offset == 0 && v.Offset > 0 {
			limit.Offset = v.Offset
		} else if limit.Offset < 0 {
			limit.Offset = 0
		}
	}

	clause.Expression = limit

	} else {
		builder.WriteQuoted(insert.Table)
	}
}

// MergeClause merge insert clause
func (insert Insert) MergeClause(clause *Clause) {
	if v, ok := clause.Expression.(Insert); ok {
		if insert.Modifier == "" {
			insert.Modifier = v.Modifier
		}
		if insert.Table.Name == "" {
			insert.Table = v.Table
		}
	}
	clause.Expression = insert

			}
		}
	}
}

// MergeClause merge order by clauses
func (orderBy OrderBy) MergeClause(clause *Clause) {
	if v, ok := clause.Expression.(OrderBy); ok {
		for i := len(orderBy.Columns) - 1; i >= 0; i-- {
			if orderBy.Columns[i].Reorder {
				orderBy.Columns = orderBy.Columns[i:]
				clause.Expression = orderBy
				return
			}
		}

		copiedColumns := make([]OrderByColumn, len(v.Columns))