package db

import (
	"database/sql"
	"fmt"
)

func (c *Client) QueryRows(query string) ([]map[string]interface{}, error) {
	if c.Conn == nil {
		return nil, fmt.Errorf("database connection is nil")
	}

	rows, err := c.Conn.Query(query)
	if err != nil {
		return nil, fmt.Errorf("query error: %v", err)
	}
	defer func(rows *sql.Rows) {
		err := rows.Close()
		if err != nil {
			fmt.Println("关闭资源失败")
		}
	}(rows)

	// 获取列名
	cols, err := rows.Columns()
	if err != nil {
		return nil, err
	}

	var result []map[string]interface{}

	for rows.Next() {
		// 创建扫描用的切片
		columnPointers := make([]interface{}, len(cols))
		columnValues := make([]interface{}, len(cols))
		for i := range columnPointers {
			columnPointers[i] = &columnValues[i]
		}

		if err := rows.Scan(columnPointers...); err != nil {
			return nil, err
		}

		rowMap := make(map[string]interface{})
		for i, colName := range cols {
			val := columnValues[i]
			if b, ok := val.([]byte); ok {
				rowMap[colName] = string(b)
			} else {
				rowMap[colName] = val
			}
		}

		result = append(result, rowMap)
	}

	if err := rows.Err(); err != nil {
		return nil, err
	}

	return result, nil
}