package cli

import (
	"fmt"
	"sort"
	"strconv"
)

// settingDef describes a configurable global setting for `config list`/`set`.
type settingDef struct {
	desc     string
	validate func(string) error
}

// settingsRegistry is the authoritative set of valid config keys. `config set`
// rejects keys absent here; `config list` enumerates them.
var settingsRegistry = map[string]settingDef{
	"audit_retention_days": {
		desc: "Days to keep audit-log entries (integer >= 0)",
		validate: func(v string) error {
			n, err := strconv.Atoi(v)
			if err != nil || n < 0 {
				return fmt.Errorf("must be an integer >= 0, got %q", v)
			}
			return nil
		},
	},
}

// settingKeys returns the registry keys in stable sorted order.
func settingKeys() []string {
	ks := make([]string, 0, len(settingsRegistry))
	for k := range settingsRegistry {
		ks = append(ks, k)
	}
	sort.Strings(ks)
	return ks
}