package go_i2cp

import "fmt"

const (
	PROTOCOL = (1 << 0)
	LOGIC    = (1 << 1)

	DEBUG   = (1 << 4)
	INFO    = (1 << 5)
	WARNING = (1 << 6)
	ERROR   = (1 << 7)
	FATAL   = (1 << 8)

	STRINGMAP      = (1 << 9)
	INTMAP         = (1 << 10)
	QUEUE          = (1 << 11)
	STREAM         = (1 << 12)
	CRYPTO         = (1 << 13)
	TCP            = (1 << 14)
	CLIENT         = (1 << 15)
	CERTIFICATE    = (1 << 16)
	LEASE          = (1 << 17)
	DESTINATION    = (1 << 18)
	SESSION        = (1 << 19)
	SESSION_CONFIG = (1 << 20)
	TEST           = (1 << 21)
	DATAGRAM       = (1 << 22)
	CONFIG_FILE    = (1 << 23)
	VERSION        = (1 << 24)

	TAG_MASK       = 0x0000000f
	LEVEL_MASK     = 0x000001f0
	COMPONENT_MASK = 0xfffffe00

	ALL = 0xffffffff
)

type LoggerTags = uint32
type LoggerCallbacks struct {
	opaque *interface{}
	onLog  func(*Logger, LoggerTags, string)
}
type Logger struct {
	callbacks *LoggerCallbacks
	logLevel  int
}

var logInstance *Logger

// TODO filter
func LogInit(callbacks *LoggerCallbacks, level int) {
	logInstance = &Logger{callbacks: callbacks}
	logInstance.setLogLevel(level)
}
func Debug(tags LoggerTags, message string, args ...interface{}) {
	logInstance.log(tags|DEBUG, message, args...)
}
func Info(tags LoggerTags, message string, args ...interface{}) {
	logInstance.log(tags|INFO, message, args...)
}
func Warning(tags LoggerTags, message string, args ...interface{}) {
	logInstance.log(tags|WARNING, message, args...)
}
func Error(tags LoggerTags, message string, args ...interface{}) {
	logInstance.log(tags|ERROR, message, args...)
}
func Fatal(tags LoggerTags, message string, args ...interface{}) {
	logInstance.log(tags|FATAL, message, args...)
}

func (l *Logger) log(tags LoggerTags, format string, args ...interface{}) {
	if l.callbacks == nil {
		fmt.Printf(format, args)
	} else {
		l.callbacks.onLog(l, tags, fmt.Sprintf(format, args))
	}
}

func (l *Logger) setLogLevel(level int) {
	switch level {
	case DEBUG:
	case INFO:
	case WARNING:
	case ERROR:
	case FATAL:
		l.logLevel = level
	default:
		l.logLevel = ERROR
	}
}