// Copyright 2022 by Sascha L. Teichmann
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.

package common

import (
	"fmt"
	"strings"
)

type DBClientCreator func() (DBClient, error)

func IsPostgreSQL(host string) (string, bool) {
	if strings.HasPrefix(host, "postgres:") {
		return host[len("postgres:"):], true
	}
	return "", false
}

func CreateDBClientCreator(host string, port int) DBClientCreator {

	if host, ok := IsPostgreSQL(host); ok {
		return func() (DBClient, error) {
			return NewPGClient(host)
		}
	}

	var address string
	if strings.ContainsRune(host, '/') {
		address = host
	} else {
		address = fmt.Sprintf("%s:%d", host, port)
	}

	var proto string
	if strings.ContainsRune(address, '/') {
		proto = "unix"
	} else {
		proto = "tcp"
	}

	return func() (DBClient, error) {
		return NewRedisClient(proto, address)
	}
}