package syslog

// Facility represents a message source as defined by RFC 3164.
type Facility byte

// The following is a list of Facilities as defined by RFC 3164.
const (
	Kern     Facility = iota // kernel messages
	User                     // user-level messages
	Mail                     // mail system
	Daemon                   // system daemons
	Auth                     // security/authorization messages
	Syslog                   // messages internal to syslogd
	Lpr                      // line printer subsystem
	News                     // newtork news subsystem
	Uucp                     // UUCP subsystem
	Cron                     // cron messages
	Authpriv                 // security/authorization messages
	System0                  // historically FTP daemon
	System1                  // historically NTP subsystem
	System2                  // historically log audit
	System3                  // historically log alert
	System4                  // historically clock daemon, some operating systems use this for cron
	Local0                   // local use 0
	Local1                   // local use 1
	Local2                   // local use 2
	Local3                   // local use 3
	Local4                   // local use 4
	Local5                   // local use 5
	Local6                   // local use 6
	Local7                   // local use 7
)

var facToStr = [...]string{
	"kern",
	"user",
	"mail",
	"daemon",
	"auth",
	"syslog",
	"lpr",
	"news",
	"uucp",
	"cron",
	"authpriv",
	"system0",
	"system1",
	"system2",
	"system3",
	"system4",
	"local0",
	"local1",
	"local2",
	"local3",
	"local4",
	"local5",
	"local6",
	"local7",
}

// String returns a string representation of the Facility. This satisfies the
// fmt.Stringer interface.
func (f Facility) String() string {
	if f > Local7 {
		return "unknown"
	}
	return facToStr[f]
}

// Severity represents a level of messsage importance.
type Severity byte

const (
	// Emerg - system is unusable
	Emerg Severity = iota
	// Alert - immediate action required
	Alert
	// Crit - critical conditions
	Crit
	// Err - error conditions
	Err
	// Warning - warning conditions
	Warning
	// Notice - normal but significant condition
	Notice
	// Info - information message
	Info
	// Debug - debug-level message
	Debug
)

var sevToStr = [...]string{
	"emerg",
	"alert",
	"crit",
	"err",
	"waining",
	"notice",
	"info",
	"debug",
}

// String returns a string representation of the Severity. This satisfies the
// fmt.Stringer interface.
func (s Severity) String() string {
	if s > Debug {
		return "unknown"
	}
	return sevToStr[s]
}