package main

import (
	"fmt"
	"log"
	"os"

	"github.com/fsnotify/fsnotify"
)

func initHomeWatcher() (*fsnotify.Watcher, error) {
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return nil, err
	}

	// TODO filepath.Walk over /home, adding to watcher
	paths := []string{"/home/vilmibm", "/home/wren"}

	for _, path := range paths {
		err = watcher.Add(path)
		if err != nil {
			fmt.Fprintf(os.Stderr, "failed to watch path %s: %w", path, err)
			continue
		}
	}
	return watcher, nil
}

func watchHome(watcher *fsnotify.Watcher) {
	for {
		select {
		case event, ok := <-watcher.Events:
			if !ok {
				return
			}
			log.Println("event:", event)
			if event.Op&fsnotify.Write == fsnotify.Write {
				log.Println("modified file:", event.Name)
			}
		case err, ok := <-watcher.Errors:
			if !ok {
				return
			}
			log.Println("error:", err)
		}
	}
}

func cli(args []string) int {
	watcher, err := initHomeWatcher()
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to create watcher: %w", err)
		return 1
	}
	defer watcher.Close()

	// TODO have an event bus to write to
	// TODO what is this done for do i need this done
	done := make(chan bool)
	go watchHome(watcher)
	<-done

	return 0
}

func main() {
	os.Exit(cli(os.Args))
}