package config

import (
	"errors"
	"io"
	"io/ioutil"
	"log"
	"os"
	"strings"

	_c "source.uit.com/mikevoets/inf-3200-1/config"
)

type LogPrefix string
type LogLevel int
type LogHandle io.Writer
type LogFlag int

var (
	Trace   *log.Logger
	Info    *log.Logger
	Warning *log.Logger
	Error   *log.Logger
	Panic   *log.Logger
)

var (
	DISCARD_HANDLE LogHandle = ioutil.Discard
	HANDLE_TRACE   LogHandle = os.Stdout
	HANDLE_INFO    LogHandle = os.Stdout
	HANDLE_WARNING LogHandle = os.Stdout
	HANDLE_ERROR   LogHandle = os.Stderr
	HANDLE_PANIC   LogHandle = os.Stderr
	LOG_DIR                  = _c.TmpDir + string(os.PathSeparator) + "logs"
	FILE_EXTRA     string    = ""
	LOG_FORMAT               = log.Ldate | log.Lmicroseconds
)

const (
	FILE_MASK = os.O_CREATE | os.O_WRONLY | os.O_APPEND
	FILE_PERM = 0666
)

const (
	PREFIX_TRACE   LogPrefix = "TRACE"
	PREFIX_INFO    LogPrefix = "INFO"
	PREFIX_WARNING LogPrefix = "WARNING"
	PREFIX_ERROR   LogPrefix = "ERROR"
	PREFIX_PANIC   LogPrefix = "PANIC"
)

const (
	TRACE   LogLevel = 1<<iota | 0
	INFO    LogLevel = 1<<iota | TRACE
	WARNING LogLevel = 1<<iota | INFO
	ERROR   LogLevel = 1<<iota | WARNING
	PANIC   LogLevel = 1<<iota | ERROR
)

var (
	LOG_LEVEL_OUTPUT LogLevel = INFO
	LOG_LEVEL_FILE   LogLevel = WARNING
)

func (c *LogLevel) Set(l string) error {

	l = strings.ToUpper(l)

	if l == "TRACE" {
		*c = TRACE
	} else if l == "INFO" {
		*c = INFO
	} else if l == "WARNING" {
		*c = WARNING
	} else if l == "ERROR" {
		*c = ERROR
	} else if l == "PANIC" {
		*c = PANIC
	} else {
		return errors.New("Unknown log level: TRACE|INFO|WARNING|ERROR|PANIC")
	}
	return nil
}

func (c *LogLevel) String() string {
	switch *c {
	case TRACE:
		return "TRACE"
	case INFO:
		return "INFO"
	case WARNING:
		return "WARNING"
	case ERROR:
		return "ERROR"
	default:
		return "PANIC"
	}
}