package evelogs

import (
	"fmt"
	"log"
	"os"
)

type LogFile struct {
	Path string
}

// create a lofFile instance, if it's a file.
func NewLogFile(path string) (*LogFile, error) {
	lf := &LogFile{Path: path}
	exists := lf.FileExists()
	if !exists {
		return nil, fmt.Errorf("File %s not found or is directory", lf.Path)
	}
	return lf, nil
}

func (lf *LogFile) FileExists() bool {
	info, err := os.Stat(lf.Path)
	if os.IsNotExist(err) {
		return false
	}
	return !info.IsDir()
}

func (lf *LogFile) TailFile() error {
	//lets start a goroutine to tail the file here
	return nil
}

//create logFile instances from a list of paths
func PathsToLogFiles(paths []string) ([]*LogFile, error) {
	var logFiles []*LogFile
	for _, f := range paths {
		nLogFile, err := NewLogFile(f)
		if err != nil {
			log.Printf("Error with %s: %s", f, err)
			return nil, err
		}
		logFiles = append(logFiles, nLogFile)
	}
	return logFiles, nil
}