package convids

import (
	"os"
	fp "path/filepath"
	"regexp"
	"strings"

	"gopkg.in/yaml.v3"
)

func NewData(path string) (*Data, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	ydec := yaml.NewDecoder(f)
	var data Data
	err = ydec.Decode(&data)
	return &data, err
}

func ensureExtRe(c *Config) (err error) {
	if c.extRe != nil {
		return nil
	}
	c.extRe, err = regexp.Compile("(" + strings.Join(c.Extensions, "|") + ")$")
	return
}

func WalkFiles(d *Data, stopOnError, silent bool, cb func(s *Show, path string) error) (err error) {
	err = ensureExtRe(d.Config)
	if err != nil {
		return
	}
	var files []os.DirEntry
	files, err = os.ReadDir(d.Config.Source)
	if err != nil {
		return
	}
	for s := range d.AllShows(silent) {
		var found bool
		for _, file := range files {
			if file.IsDir() {
				continue
			}
			if !d.Config.extRe.MatchString(file.Name()) {
				continue
			}
			found, err = s.Match(file.Name())
			if err != nil {
				return
			}
			if found {
				err = cb(s, fp.Join(d.Config.Source, file.Name()))
				if err != nil && stopOnError {
					return
				}
				break
			}
		}
	}
	return nil
}