package sync

import (
	"fmt"
	"path"
	"strings"

	"srs.epita.fr/fic-server/libfic"
)

func SyncExerciceKeys(i Importer, exercice fic.Exercice) []string {
	var errs []string

	if _, err := exercice.WipeKeys(); err != nil {
		errs = append(errs, err.Error())
	} else if flags, err := getFileContent(i, path.Join(exercice.Path, "flags.txt")); err != nil {
		errs = append(errs, fmt.Sprintf("%q: unable to read flags: %s", path.Base(exercice.Path), err))
	} else {
		for nline, flag := range strings.Split(flags, "\n") {
			flag_splt := strings.SplitN(string(flag), "\t", 2)
			if len(flag_splt) > 2 {
				errs = append(errs, fmt.Sprintf("%q: error in flags file at line %d: invalid format", path.Base(exercice.Path), nline + 1))
				continue
			}

			var label, rawkey string
			if len(flag_splt) == 1 {
				rawkey = flag_splt[0]
			} else {
				label = flag_splt[0]
				rawkey = flag_splt[1]
			}

			if len(label) == 0 {
				label = "Flag"
			}

			if _, err := exercice.AddRawKey(label, rawkey); err != nil {
				errs = append(errs, fmt.Sprintf("%q: error in flags file at line %d: %s", path.Base(exercice.Path), nline + 1, err))
				continue
			}

		}
	}
	return errs
}