package dialectquery

import "fmt"

type Sqlserver struct{}

var _ Querier = (*Sqlserver)(nil)

func (s *Sqlserver) CreateTable(tableName string) string {
	q := `CREATE TABLE %s (
		id INT NOT NULL IDENTITY(1,1) PRIMARY KEY,
		version_id BIGINT NOT NULL,
		is_applied BIT NOT NULL,
		tstamp DATETIME NULL DEFAULT CURRENT_TIMESTAMP
	)`
	return fmt.Sprintf(q, tableName)
}

func (s *Sqlserver) InsertVersion(tableName string) string {
	q := `INSERT INTO %s (version_id, is_applied) VALUES (@p1, @p2)`
	return fmt.Sprintf(q, tableName)
}

func (s *Sqlserver) DeleteVersion(tableName string) string {
	q := `DELETE FROM %s WHERE version_id=@p1`
	return fmt.Sprintf(q, tableName)
}

func (s *Sqlserver) GetMigrationByVersion(tableName string) string {
	q := `SELECT TOP 1 tstamp, is_applied FROM %s WHERE version_id=@p1 ORDER BY tstamp DESC`
	return fmt.Sprintf(q, tableName)
}

func (s *Sqlserver) ListMigrations(tableName string) string {
	q := `SELECT version_id, is_applied FROM %s ORDER BY id DESC`
	return fmt.Sprintf(q, tableName)
}

func (s *Sqlserver) GetLatestVersion(tableName string) string {
	q := `SELECT MAX(version_id) FROM %s`
	return fmt.Sprintf(q, tableName)
}