/*
 * Copyright 2021 PingCAP, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package constant

import (
	"fmt"
	"os"
	"path"
)

const (
	// FlinkVersion is the version of link to download
	FlinkVersion = "1.13.1"

	// EnvNameMimirHome indicates where mimir client installed in
	EnvNameMimirHome = "MIMIR_HOME"

	// EnvNameEndpoint indicates the address mimir should connect to
	EnvNameEndpoint = "MIMIR_ENDPOINT"

	DefaultFlinkDownloadUrl = "https://mirrors.tuna.tsinghua.edu.cn/apache/flink/flink-" + FlinkVersion + "/flink-" + FlinkVersion + "-bin-scala_2.11.tgz"
)

func HomeDir() string {
	home := os.Getenv(EnvNameMimirHome)
	if home == "" {
		userHome, err := os.UserHomeDir()
		if err != nil {
			panic(fmt.Sprintf("get user home: %s", err))
		}
		home = path.Join(userHome, ".mimir")
	}
	return home
}