package diff import (	"crypto/sha256"	"encoding/hex"	"fmt"	"sort"	"strings" 	"github.com/router-for-me/CLIProxyAPI/v7/internal/config") type OAuthRequestScopedErrorsSummary struct {	hash  string	count int} // SummarizeOAuthRequestScopedErrors summarizes OAuth request-scoped errors per channel.func SummarizeOAuthRequestScopedErrors(entries map[string][]config.RequestScopedErrorRule) map[string]OAuthRequestScopedErrorsSummary {	if len(entries) == 0 {		return nil	}	out := make(map[string]OAuthRequestScopedErrorsSummary, len(entries))	for k, v := range entries {		key := strings.ToLower(strings.TrimSpace(k))		if key == "" {			continue		}		out[key] = summarizeOAuthRequestScopedErrorsList(v)	}	if len(out) == 0 {		return nil	}	return out} // DiffOAuthRequestScopedErrorsChanges compares OAuth request-scoped error maps.func DiffOAuthRequestScopedErrorsChanges(oldMap, newMap map[string][]config.RequestScopedErrorRule) ([]string, []string) {	oldSummary := SummarizeOAuthRequestScopedErrors(oldMap)	newSummary := SummarizeOAuthRequestScopedErrors(newMap)	keys := make(map[string]struct{}, len(oldSummary)+len(newSummary))	for k := range oldSummary {		keys[k] = struct{}{}	}	for k := range newSummary {		keys[k] = struct{}{}	}	changes := make([]string, 0, len(keys))	affected := make([]string, 0, len(keys))	for key := range keys {		oldInfo, okOld := oldSummary[key]		newInfo, okNew := newSummary[key]		switch {		case okOld && !okNew:			changes = append(changes, fmt.Sprintf("oauth-request-scoped-errors[%s]: removed", key))			affected = append(affected, key)		case !okOld && okNew:			changes = append(changes, fmt.Sprintf("oauth-request-scoped-errors[%s]: added (%d entries)", key, newInfo.count))			affected = append(affected, key)		case okOld && okNew && oldInfo.hash != newInfo.hash:			changes = append(changes, fmt.Sprintf("oauth-request-scoped-errors[%s]: updated (%d -> %d entries)", key, oldInfo.count, newInfo.count))			affected = append(affected, key)		}	}	sort.Strings(changes)	sort.Strings(affected)	return changes, affected} func summarizeOAuthRequestScopedErrorsList(list []config.RequestScopedErrorRule) OAuthRequestScopedErrorsSummary {	if len(list) == 0 {		return OAuthRequestScopedErrorsSummary{}	}	var b strings.Builder	valid := 0	for _, entry := range list {		if entry.Status <= 0 || (len(entry.Match) == 0 && len(entry.MatchRegexr) == 0) || entry.Action == "" {			continue		}		valid++		b.WriteString(fmt.Sprintf("%d|%s|%s|%s\n", entry.Status, strings.Join(entry.Match, ","), strings.Join(entry.MatchRegexr, ","), entry.Action))	}	if valid == 0 {		return OAuthRequestScopedErrorsSummary{}	}	sum := sha256.Sum256([]byte(b.String()))	return OAuthRequestScopedErrorsSummary{		hash:  hex.EncodeToString(sum[:]),		count: valid,	}}