package clause

// Select select attrs when querying, updating, creating
type Select struct {
	Distinct   bool
	Columns    []Column
	Expression Expression
}

func (s Select) Name() string {
	return "SELECT"
}

func (s Select) Build(builder Builder) {
	if len(s.Columns) > 0 {
		if s.Distinct {
			builder.WriteString("DISTINCT ")
		}

		for idx, column := range s.Columns {
			if idx > 0 {
				builder.WriteByte(',')

                  region_name='us-east-1')

r = s3.select_object_content(
    Bucket='mycsvbucket',
    Key='sampledata/TotalPopulation.csv.gz',
    ExpressionType='SQL',
    Expression="select * from s3object s where s.Location like '%United States%'",
    InputSerialization={
        'CSV': {
            "FileHeaderInfo": "USE",
        },
        'CompressionType': 'GZIP',
    },

		return nil
	}

	panic(fmt.Errorf("unknown output format '%v'", s3Select.Output.format))
}

// Evaluate - filters and sends records read from opened reader as per select statement to http response writer.
func (s3Select *S3Select) Evaluate(w http.ResponseWriter) {
	getProgressFunc := s3Select.getProgress
	if !s3Select.Progress.Enabled {
		getProgressFunc = nil
	}

	}

	r = dryDB.Table("gorm.user").Select("name").Find(&User{}).Statement
	if !regexp.MustCompile("SELECT .name. FROM .gorm.\\..user. WHERE .user.\\..deleted_at. IS NULL").MatchString(r.Statement.SQL.String()) {
		t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
	}

	r = dryDB.Select("name").Find(&UserWithTable{}).Statement

		t.Fatalf("Build Select with slice, but got %v", r.Statement.SQL.String())
	}

	// SELECT COALESCE(age,'42') FROM users;
	r = dryDB.Table("users").Select("COALESCE(age,?)", 42).Find(&User{})
	if !regexp.MustCompile(`SELECT COALESCE\(age,.*\) FROM .*users.*`).MatchString(r.Statement.SQL.String()) {
		t.Fatalf("Build Select with func, but got %v", r.Statement.SQL.String())
	}

	// named arguments

//
// Use Select when you only want a subset of the fields. By default, GORM will select all fields.
// Select accepts both string arguments and arrays.
//
//	// Select name and age of user using multiple arguments
//	db.Select("name", "age").Find(&users)
//	// Select name and age of user using an array
//	db.Select([]string{"name", "age"}).Find(&users)

		}
	}
}

func (e *SelectExpression) analyze(s *Select) (result qProp) {
	if e.All {
		return qProp{isRowFunc: true}
	}

	for _, ex := range e.Expressions {
		result.combine(ex.analyze(s))
	}
	return result
}

func (e *AliasedExpression) analyze(s *Select) qProp {
	return e.Expression.analyze(s)
}

func (e *Expression) analyze(s *Select) (result qProp) {
	for _, ac := range e.And {

		Vars    []interface{}
	}{
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.Locking{Strength: clause.LockingStrengthUpdate}},
			"SELECT * FROM `users` FOR UPDATE", nil,
		},
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.Locking{Strength: clause.LockingStrengthShare, Table: clause.Table{Name: clause.CurrentTable}}},
			"SELECT * FROM `users` FOR SHARE OF `users`", nil,
		},
		{

		Result  string
		Vars    []interface{}
	}{
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.OrderBy{
				Columns: []clause.OrderByColumn{{Column: clause.PrimaryColumn, Desc: true}},
			}},
			"SELECT * FROM `users` ORDER BY `users`.`id` DESC", nil,
		},
		{
			[]clause.Interface{
				clause.Select{}, clause.From{}, clause.OrderBy{

	result := dryDB.Table("users").Select("name").Count(&count)
	if !regexp.MustCompile(`SELECT COUNT\(.name.\) FROM .*users.*`).MatchString(result.Statement.SQL.String()) {
		t.Fatalf("Build count with select, but got %v", result.Statement.SQL.String())
	}

	result = dryDB.Table("users").Distinct("name").Count(&count)