package svc

import (
	"app-cloudep-trade-service/internal/config"
	"database/sql"
	"fmt"

	"github.com/zeromicro/go-zero/core/logx"
)

func mustDSN(c config.Config) string {
	// 構建 DSN 字符串
	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?parseTime=true&interpolateParams=%t",
		c.DB.User,
		c.DB.Password,
		c.DB.Host,
		c.DB.Port,
		c.DB.Database,
		c.DB.InterpolateParams,
	)
}

func newDatabase(c config.Config) (*sql.DB, error) {
	// 創建基礎的 *sql.DB 連接
	db, err := sql.Open("mysql", mustDSN(c))
	if err != nil {
		logx.Error(fmt.Errorf("failed to connect to database: %w", err))

		return nil, err
	}

	// 設置數據庫連接池參數
	db.SetMaxIdleConns(c.DB.MaxIdleConns)
	db.SetMaxOpenConns(c.DB.MaxOpenConns)
	db.SetConnMaxLifetime(c.DB.ConnMaxLifetime)

	return db, nil
}