package eve

import (
	"fmt"
	"github.com/hpcloud/tail"
	"github.com/radovskyb/watcher"
	"log"
	"time"
)

func Tail(file string) {
	// https://godoc.org/github.com/hpcloud/tail#Config
	t, err := tail.TailFile(
		file,
		tail.Config{
			Follow: true,
		})
	if err != nil {
		fmt.Println(err)
	}

	//totalLines := 0
	//for _ = range t.Lines {
	//	totalLines ++
	//}

	//currentLine := 0
	for line := range t.Lines {
		//fmt.Printf("%v/%v", currentLine, totalLines)
		//currentLine ++
		//if currentLine > totalLines {
			fmt.Printf("##%v##%v##\n", line.Time, line.Text)
		//}

	}

}


// sends newly created files for tail'ing
// WIP
func WatchPath(dir string) {
	w := watcher.New()

	w.FilterOps()
	w.FilterOps(watcher.Create, watcher.Remove, watcher.Write)

	//r := regexp.MustCompile("^abc$")
	//w.AddFilterHook(watcher.RegexFilterHook(r, false))

	// dispatch creation/removal events here
	go func() {
		for {
			select {
			case event := <-w.Event:
				// fmt.Println(event)
				fmt.Printf("%s (%s)\n", event.Path, event.Op)
			case err := <-w.Error:
				log.Fatalln(err)
			case <-w.Closed:
				return
			}
		}
	}()

	if err := w.Add(dir); err != nil {
		log.Fatalln(err)
	}

	for path, f := range w.WatchedFiles() {
		fmt.Printf("%s: %s\n", path, f.Name())
	}

	fmt.Println("=== startup complete ===")

	// go func() {
	// 	w.Wait()
	// 	w.TriggerEvent(watcher.Create, nil)
	// }()

	if err := w.Start(time.Millisecond * 100); err != nil {
		log.Fatalln(err)
	}

}