package movies

import (
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"strings"
)

type FileSource struct {
	ID    string
	Files []string
}

func (fs *FileSource) Scan(root string) error {
	var files []string
	if err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		if info.IsDir() {
			return nil
		}

		files = append(files, path)
		return nil
	}); err != nil {
		return fmt.Errorf("error while walking directory %q: %w", root, err)
	}

	fs.Files = files

	return nil
}

func (fs *FileSource) Search(query string) []string {
	if fs == nil {
		return nil
	}

	split := strings.Split(query, " ")

	var res []string
	for _, path := range fs.Files {
		if stringContainsAll(path, split) {
			res = append(res, path)
		}
	}

	return res
}

func stringContainsAll(path string, split []string) bool {
	path = strings.ToLower(path)

	for _, s := range split {
		if !strings.Contains(path, strings.ToLower(s)) {
			return false
		}
	}
	return true
}

func (fs *FileSource) Serve(w http.ResponseWriter, r *http.Request, file string) {
	http.ServeFile(w, r, file)
}