package function

import (
	"fmt"

	"github.com/jmoiron/sqlx"
)

// ExecuteDDL 执行DDL语句（创建、删除、更新表等）
func ExecuteDDL(db *sqlx.DB, ddlSQL string) error {

	if ddlSQL == "" {
		return fmt.Errorf("DDL SQL statement is empty")
	}

	// 执行DDL语句
	_, err := db.Exec(ddlSQL)
	if err != nil {
		return fmt.Errorf("failed to execute DDL: %v", err)
	}

	return nil
}

// ExecuteDDLWithTx 在事务中执行DDL语句
func ExecuteDDLWithTx(db *sqlx.DB, ddlSQL string) error {

	if ddlSQL == "" {
		return fmt.Errorf("DDL SQL statement is empty")
	}

	// 开始事务
	tx, err := db.Begin()
	if err != nil {
		return fmt.Errorf("failed to begin transaction: %v", err)
	}

	// 执行DDL语句
	_, err = tx.Exec(ddlSQL)
	if err != nil {
		// 回滚事务
		tx.Rollback()
		return fmt.Errorf("failed to execute DDL in transaction: %v", err)
	}

	// 提交事务
	if err := tx.Commit(); err != nil {
		return fmt.Errorf("failed to commit transaction: %v", err)
	}

	return nil
}

// ExecuteMultipleDDL 执行多个DDL语句
func ExecuteMultipleDDL(db *sqlx.DB, ddlSQLs []string) error {

	if len(ddlSQLs) == 0 {
		return fmt.Errorf("DDL SQL statements are empty")
	}

	// 开始事务
	tx, err := db.Begin()
	if err != nil {
		return fmt.Errorf("failed to begin transaction: %v", err)
	}

	// 依次执行所有DDL语句
	for i, ddlSQL := range ddlSQLs {
		if ddlSQL == "" {
			tx.Rollback()
			return fmt.Errorf("DDL SQL statement at index %d is empty", i)
		}

		_, err = tx.Exec(ddlSQL)
		if err != nil {
			tx.Rollback()
			return fmt.Errorf("failed to execute DDL at index %d: %v", i, err)
		}
	}

	// 提交事务
	if err := tx.Commit(); err != nil {
		return fmt.Errorf("failed to commit transaction: %v", err)
	}

	return nil
}