package fairwind

import (
	"sync"
	"syscall/js"
)

type Log struct {
	mutex     sync.Mutex
	formatter LogFormatter
	lines     []LogLine
}

func NewLog(formatter LogFormatter) *Log {
	return &Log{
		formatter: formatter,
		lines:     []LogLine{},
	}
}

func (this *Log) Debug(message string, parameters ...LoggingParameter) {
	this.log(SEVERITY_DEBUG, message, parameters...)
}

func (this *Log) Information(message string, parameters ...LoggingParameter) {
	this.log(SEVERITY_INFORMATION, message, parameters...)
}

func (this *Log) Warning(message string, parameters ...LoggingParameter) {
	this.log(SEVERITY_WARNING, message, parameters...)
}

func (this *Log) Error(message string, parameters ...LoggingParameter) {
	this.log(SEVERITY_ERROR, message, parameters...)
}

func (this *Log) Critical(message string, parameters ...LoggingParameter) {
	this.log(SEVERITY_CRITICAL, message, parameters...)
}

func (this *Log) log(severity int, message string, parameters ...LoggingParameter) {
	this.mutex.Lock()
	defer this.mutex.Unlock()

	// TODO: detect OS
	console := js.Global().Get("console")

	line, err := this.formatter.Format(
		*NewLogLine(severity, message, parameters),
	)
	if err != nil {
		// TODO: log error OS-specific
		return
	}

	console.Call("log", line)
}