// Copyright 2026 Google LLC
//
// 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
//
//     https://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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package build

import (
	"fmt"
	"os"
	"time"
)

var Debug bool
var Timestamp bool

// Logger is a global logger that respects the Timestamp flag.
func Log(format string, v ...interface{}) {
	msg := fmt.Sprintf(format, v...)
	if Timestamp {
		t := time.Now().Format("2006-01-02 15:04:05")
		msg = fmt.Sprintf("%s %s", t, msg)
	}
	fmt.Fprintln(os.Stderr, msg)
}

// DebugLog prints only if Debug is enabled.
func DebugLog(format string, v ...interface{}) {
	if Debug {
		Log("[D] "+format, v...)
	}
}