package bundle

import (
	"fmt"
	"path"
	"strings"
)

const distributorStateName = ".distributor.json"

func ValidateSourcePath(value string) error {
	if value == "" {
		return fmt.Errorf("source path is required")
	}
	if strings.Contains(value, "\\") || strings.HasPrefix(value, "/") {
		return fmt.Errorf("source path %q must be a clean relative slash-separated path", value)
	}
	if path.Clean(value) != value {
		return fmt.Errorf("source path %q must be a clean relative slash-separated path", value)
	}
	for _, segment := range strings.Split(value, "/") {
		if segment == "" || segment == "." || segment == ".." {
			return fmt.Errorf("source path %q must be a clean relative slash-separated path", value)
		}
	}
	switch value {
	case ManifestName, distributorStateName:
		return fmt.Errorf("%q is reserved", value)
	}
	return nil
}