package main

import (
	"errors"
	"fmt"
	"io/fs"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"regexp"
	"strings"
)

const (
	absBasePath  = "/opt/synapse/download"
	seriesPath   = absBasePath + "/series"
	filmPath     = absBasePath + "/film"
	musicPath    = absBasePath + "/music"
	programsPath = absBasePath + "/programs"
)
const (
	series = iota
	film
	music
	program
)

var maybeSeries, maybeFilm, maybeMusic, maybeProgram *regexp.Regexp
var errYetPresent = errors.New("element yet present")

type classification map[string]int

func (c classification) add(element string, kind int) error {
	if _, ok := c[element]; ok {
		return errYetPresent
	}
	c[element] = kind
	return nil
}

func (c classification) get(element string) (string, bool) {
	kind, ok := c[element]
	if !ok {
		return "", false
	}
	switch kind {
	case series:
		return "series", true
	case film:
		return "film", true
	case music:
		return "music", true
	case program:
		return "program", true
	default:
		panic(fmt.Sprintf("kind value now allowed: %d\n", kind))
	}
}

var cls classification

func init() {
	maybeSeries = regexp.MustCompile(`(?i)^.*(((s|S)(\d+)((e|E)(\d+))?)|((season)(\ )?(\d+)?)).*\.(mkv|mp4|avi)$`)
	maybeFilm = regexp.MustCompile(`(?i)^.*\.(mkv|mp4|avi)$`)
	maybeMusic = regexp.MustCompile(`(?i)^.*\.(mp3|ogg|flac)$`)
	maybeProgram = regexp.MustCompile(`(?i)^.*\.(zip|tar|tar\.gz|exe|msi|rar)$`)
	cls = make(classification)
}

func isInSpecialDir(dir string) bool {
	if strings.Contains(dir, seriesPath) {
		return true
	}
	if strings.Contains(dir, filmPath) {
		return true
	}
	if strings.Contains(dir, musicPath) {
		return true
	}
	if strings.Contains(dir, programsPath) {
		return true
	}

	return false
}

func find(name string, info fs.FileInfo, err error) error {
	// skip directories
	if info.IsDir() {
		return nil
	}
	// skip special directories
	if isInSpecialDir(name) {
		return nil
	}
	return nil
}

func main() {
	fmt.Println("vim-go")
}