// Copyright 2015 Luke Shumaker
//
// 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,
// 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 logger implements a simple stderr-based logger with systemd
// log levels.
package logger

import (
	"fmt"
	"os"
)

//#include <systemd/sd-daemon.h>
import "C"

func log(level string, format string, a ...interface{}) {
	f := level + format + "\n"
	fmt.Fprintf(os.Stderr, f, a...)
}

// system is unusable
func Emerg( /*  */ format string, a ...interface{}) { log(C.SD_EMERG /*  */, format, a...) }

// action must be taken immediately
func Alert( /*  */ format string, a ...interface{}) { log(C.SD_ALERT /*  */, format, a...) }

// critical conditions
func Crit( /*   */ format string, a ...interface{}) { log(C.SD_CRIT /*   */, format, a...) }

// error conditions
func Err( /*    */ format string, a ...interface{}) { log(C.SD_ERR /*    */, format, a...) }

// warning conditions
func Warning( /**/ format string, a ...interface{}) { log(C.SD_WARNING /**/, format, a...) }

// normal but significant condition
func Notice( /* */ format string, a ...interface{}) { log(C.SD_NOTICE /* */, format, a...) }

// informational
func Info( /*   */ format string, a ...interface{}) { log(C.SD_INFO /*   */, format, a...) }

// debug-level messages
func Debug( /*  */ format string, a ...interface{}) { log(C.SD_DEBUG /*  */, format, a...) }