package auth import (	"context"	"fmt"	"net/http"	"strings"	"time" 	"github.com/router-for-me/CLIProxyAPI/v6/internal/auth/codex"	"github.com/router-for-me/CLIProxyAPI/v6/internal/browser"	// legacy client removed	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"	coreauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"	log "github.com/sirupsen/logrus") // CodexAuthenticator implements the OAuth login flow for Codex accounts.type CodexAuthenticator struct {	CallbackPort int} // NewCodexAuthenticator constructs a Codex authenticator with default settings.func NewCodexAuthenticator() *CodexAuthenticator {	return &CodexAuthenticator{CallbackPort: 1455}} func (a *CodexAuthenticator) Provider() string {	return "codex"} func (a *CodexAuthenticator) RefreshLead() *time.Duration {	d := 5 * 24 * time.Hour	return &d} func (a *CodexAuthenticator) Login(ctx context.Context, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, error) {	if cfg == nil {		return nil, fmt.Errorf("cliproxy auth: configuration is required")	}	if ctx == nil {		ctx = context.Background()	}	if opts == nil {		opts = &LoginOptions{}	} 	pkceCodes, err := codex.GeneratePKCECodes()	if err != nil {		return nil, fmt.Errorf("codex pkce generation failed: %w", err)	} 	state, err := misc.GenerateRandomState()	if err != nil {		return nil, fmt.Errorf("codex state generation failed: %w", err)	} 	oauthServer := codex.NewOAuthServer(a.CallbackPort)	if err = oauthServer.Start(); err != nil {		if strings.Contains(err.Error(), "already in use") {			return nil, codex.NewAuthenticationError(codex.ErrPortInUse, err)		}		return nil, codex.NewAuthenticationError(codex.ErrServerStartFailed, err)	}	defer func() {		stopCtx, cancel := context.WithTimeout(context.Background(), 2*time.Second)		defer cancel()		if stopErr := oauthServer.Stop(stopCtx); stopErr != nil {			log.Warnf("codex oauth server stop error: %v", stopErr)		}	}() 	authSvc := codex.NewCodexAuth(cfg) 	authURL, err := authSvc.GenerateAuthURL(state, pkceCodes)	if err != nil {		return nil, fmt.Errorf("codex authorization url generation failed: %w", err)	} 	if !opts.NoBrowser {		fmt.Println("Opening browser for Codex authentication")		if !browser.IsAvailable() {			log.Warn("No browser available; please open the URL manually")			util.PrintSSHTunnelInstructions(a.CallbackPort)			fmt.Printf("Visit the following URL to continue authentication:\n%s\n", authURL)		} else if err = browser.OpenURL(authURL); err != nil {			log.Warnf("Failed to open browser automatically: %v", err)			util.PrintSSHTunnelInstructions(a.CallbackPort)			fmt.Printf("Visit the following URL to continue authentication:\n%s\n", authURL)		}	} else {		util.PrintSSHTunnelInstructions(a.CallbackPort)		fmt.Printf("Visit the following URL to continue authentication:\n%s\n", authURL)	} 	fmt.Println("Waiting for Codex authentication callback...") 	result, err := oauthServer.WaitForCallback(5 * time.Minute)	if err != nil {		if strings.Contains(err.Error(), "timeout") {			return nil, codex.NewAuthenticationError(codex.ErrCallbackTimeout, err)		}		return nil, err	} 	if result.Error != "" {		return nil, codex.NewOAuthError(result.Error, "", http.StatusBadRequest)	} 	if result.State != state {		return nil, codex.NewAuthenticationError(codex.ErrInvalidState, fmt.Errorf("state mismatch"))	} 	log.Debug("Codex authorization code received; exchanging for tokens") 	authBundle, err := authSvc.ExchangeCodeForTokens(ctx, result.Code, pkceCodes)	if err != nil {		return nil, codex.NewAuthenticationError(codex.ErrCodeExchangeFailed, err)	} 	tokenStorage := authSvc.CreateTokenStorage(authBundle) 	if tokenStorage == nil || tokenStorage.Email == "" {		return nil, fmt.Errorf("codex token storage missing account information")	} 	fileName := fmt.Sprintf("codex-%s.json", tokenStorage.Email)	metadata := map[string]any{		"email": tokenStorage.Email,	} 	fmt.Println("Codex authentication successful")	if authBundle.APIKey != "" {		fmt.Println("Codex API key obtained and stored")	} 	return &coreauth.Auth{		ID:       fileName,		Provider: a.Provider(),		FileName: fileName,		Storage:  tokenStorage,		Metadata: metadata,	}, nil}