package storage

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

type Layout struct {
	Root string
}

func New(root string) Layout {
	return Layout{Root: root}
}

func (l Layout) Ensure() error {
	for _, rel := range []string{"events", "live", "logs", "artifacts", "cache", "workspaces", "secrets", "inbox", "active", "schedules"} {
		if err := os.MkdirAll(filepath.Join(l.Root, rel), 0o755); err != nil {
			return err
		}
	}
	return nil
}

func (l Layout) SecretPath(repo, job, name string) (string, error) {
	for label, value := range map[string]string{"repo": repo, "job": job, "secret": name} {
		if err := cleanSegment(label, value); err != nil {
			return "", err
		}
	}
	return filepath.Join(l.Root, "secrets", repo, job, name), nil
}

func cleanSegment(label, value string) error {
	if strings.TrimSpace(value) == "" {
		return fmt.Errorf("empty %s segment", label)
	}
	if value != filepath.Base(value) || value == "." || value == ".." || strings.Contains(value, string(filepath.Separator)) {
		return fmt.Errorf("unsafe %s segment %q", label, value)
	}
	return nil
}