package diff import (	"crypto/sha256"	"encoding/hex"	"fmt"	"sort"	"strings" 	"github.com/router-for-me/CLIProxyAPI/v7/internal/config") type OAuthModelAliasSummary struct {	hash  string	count int} // SummarizeOAuthModelAlias summarizes OAuth model alias per channel.func SummarizeOAuthModelAlias(entries map[string][]config.OAuthModelAlias) map[string]OAuthModelAliasSummary {	if len(entries) == 0 {		return nil	}	out := make(map[string]OAuthModelAliasSummary, len(entries))	for k, v := range entries {		key := strings.ToLower(strings.TrimSpace(k))		if key == "" {			continue		}		out[key] = summarizeOAuthModelAliasList(v)	}	if len(out) == 0 {		return nil	}	return out} // DiffOAuthModelAliasChanges compares OAuth model alias maps.func DiffOAuthModelAliasChanges(oldMap, newMap map[string][]config.OAuthModelAlias) ([]string, []string) {	oldSummary := SummarizeOAuthModelAlias(oldMap)	newSummary := SummarizeOAuthModelAlias(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-model-alias[%s]: removed", key))			affected = append(affected, key)		case !okOld && okNew:			changes = append(changes, fmt.Sprintf("oauth-model-alias[%s]: added (%d entries)", key, newInfo.count))			affected = append(affected, key)		case okOld && okNew && oldInfo.hash != newInfo.hash:			changes = append(changes, fmt.Sprintf("oauth-model-alias[%s]: updated (%d -> %d entries)", key, oldInfo.count, newInfo.count))			affected = append(affected, key)		}	}	sort.Strings(changes)	sort.Strings(affected)	return changes, affected} func summarizeOAuthModelAliasList(list []config.OAuthModelAlias) OAuthModelAliasSummary {	if len(list) == 0 {		return OAuthModelAliasSummary{}	}	seen := make(map[string]struct{}, len(list))	normalized := make([]string, 0, len(list))	for _, alias := range list {		name := strings.ToLower(strings.TrimSpace(alias.Name))		aliasVal := strings.ToLower(strings.TrimSpace(alias.Alias))		if name == "" || aliasVal == "" {			continue		}		key := name + "->" + aliasVal		if alias.Fork {			key += "|fork"		}		if displayName := strings.TrimSpace(alias.DisplayName); displayName != "" {			key += "|display-name=" + displayName		}		if alias.ForceMapping {			key += "|force-mapping"		}		if _, exists := seen[key]; exists {			continue		}		seen[key] = struct{}{}		normalized = append(normalized, key)	}	if len(normalized) == 0 {		return OAuthModelAliasSummary{}	}	sort.Strings(normalized)	sum := sha256.Sum256([]byte(strings.Join(normalized, "|")))	return OAuthModelAliasSummary{		hash:  hex.EncodeToString(sum[:]),		count: len(normalized),	}}