package executor import (	"bufio"	"bytes"	"context"	"fmt"	"io"	"net/http"	"os"	"path/filepath"	"runtime"	"strings"	"time" 	kimiauth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth/kimi"	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"	"github.com/router-for-me/CLIProxyAPI/v6/internal/thinking"	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"	sdktranslator "github.com/router-for-me/CLIProxyAPI/v6/sdk/translator"	log "github.com/sirupsen/logrus"	"github.com/tidwall/sjson") // KimiExecutor is a stateless executor for Kimi API using OpenAI-compatible chat completions.type KimiExecutor struct {	cfg *config.Config} // NewKimiExecutor creates a new Kimi executor.func NewKimiExecutor(cfg *config.Config) *KimiExecutor { return &KimiExecutor{cfg: cfg} } // Identifier returns the executor identifier.func (e *KimiExecutor) Identifier() string { return "kimi" } // PrepareRequest injects Kimi credentials into the outgoing HTTP request.func (e *KimiExecutor) PrepareRequest(req *http.Request, auth *cliproxyauth.Auth) error {	if req == nil {		return nil	}	token := kimiCreds(auth)	if strings.TrimSpace(token) != "" {		req.Header.Set("Authorization", "Bearer "+token)	}	return nil} // HttpRequest injects Kimi credentials into the request and executes it.func (e *KimiExecutor) HttpRequest(ctx context.Context, auth *cliproxyauth.Auth, req *http.Request) (*http.Response, error) {	if req == nil {		return nil, fmt.Errorf("kimi executor: request is nil")	}	if ctx == nil {		ctx = req.Context()	}	httpReq := req.WithContext(ctx)	if err := e.PrepareRequest(httpReq, auth); err != nil {		return nil, err	}	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)	return httpClient.Do(httpReq)} // Execute performs a non-streaming chat completion request to Kimi.func (e *KimiExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (resp cliproxyexecutor.Response, err error) {	baseModel := thinking.ParseSuffix(req.Model).ModelName 	token := kimiCreds(auth) 	reporter := newUsageReporter(ctx, e.Identifier(), baseModel, auth)	defer reporter.trackFailure(ctx, &err) 	from := opts.SourceFormat	to := sdktranslator.FromString("openai")	originalPayload := bytes.Clone(req.Payload)	if len(opts.OriginalRequest) > 0 {		originalPayload = bytes.Clone(opts.OriginalRequest)	}	originalTranslated := sdktranslator.TranslateRequest(from, to, baseModel, originalPayload, false)	body := sdktranslator.TranslateRequest(from, to, baseModel, bytes.Clone(req.Payload), false) 	// Strip kimi- prefix for upstream API	upstreamModel := stripKimiPrefix(baseModel)	body, err = sjson.SetBytes(body, "model", upstreamModel)	if err != nil {		return resp, fmt.Errorf("kimi executor: failed to set model in payload: %w", err)	} 	body, err = thinking.ApplyThinking(body, req.Model, from.String(), "kimi", e.Identifier())	if err != nil {		return resp, err	} 	requestedModel := payloadRequestedModel(opts, req.Model)	body = applyPayloadConfigWithRoot(e.cfg, baseModel, to.String(), "", body, originalTranslated, requestedModel) 	url := kimiauth.KimiAPIBaseURL + "/chat/completions"	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))	if err != nil {		return resp, err	}	applyKimiHeadersWithAuth(httpReq, token, false, auth)	var authID, authLabel, authType, authValue string	if auth != nil {		authID = auth.ID		authLabel = auth.Label		authType, authValue = auth.AccountInfo()	}	recordAPIRequest(ctx, e.cfg, upstreamRequestLog{		URL:       url,		Method:    http.MethodPost,		Headers:   httpReq.Header.Clone(),		Body:      body,		Provider:  e.Identifier(),		AuthID:    authID,		AuthLabel: authLabel,		AuthType:  authType,		AuthValue: authValue,	}) 	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)	httpResp, err := httpClient.Do(httpReq)	if err != nil {		recordAPIResponseError(ctx, e.cfg, err)		return resp, err	}	defer func() {		if errClose := httpResp.Body.Close(); errClose != nil {			log.Errorf("kimi executor: close response body error: %v", errClose)		}	}()	recordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {		b, _ := io.ReadAll(httpResp.Body)		appendAPIResponseChunk(ctx, e.cfg, b)		logWithRequestID(ctx).Debugf("request error, error status: %d, error message: %s", httpResp.StatusCode, summarizeErrorBody(httpResp.Header.Get("Content-Type"), b))		err = statusErr{code: httpResp.StatusCode, msg: string(b)}		return resp, err	}	data, err := io.ReadAll(httpResp.Body)	if err != nil {		recordAPIResponseError(ctx, e.cfg, err)		return resp, err	}	appendAPIResponseChunk(ctx, e.cfg, data)	reporter.publish(ctx, parseOpenAIUsage(data))	var param any	// Note: TranslateNonStream uses req.Model (original with suffix) to preserve	// the original model name in the response for client compatibility.	out := sdktranslator.TranslateNonStream(ctx, to, from, req.Model, bytes.Clone(opts.OriginalRequest), body, data, &param)	resp = cliproxyexecutor.Response{Payload: []byte(out)}	return resp, nil} // ExecuteStream performs a streaming chat completion request to Kimi.func (e *KimiExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (stream <-chan cliproxyexecutor.StreamChunk, err error) {	baseModel := thinking.ParseSuffix(req.Model).ModelName 	token := kimiCreds(auth) 	reporter := newUsageReporter(ctx, e.Identifier(), baseModel, auth)	defer reporter.trackFailure(ctx, &err) 	from := opts.SourceFormat	to := sdktranslator.FromString("openai")	originalPayload := bytes.Clone(req.Payload)	if len(opts.OriginalRequest) > 0 {		originalPayload = bytes.Clone(opts.OriginalRequest)	}	originalTranslated := sdktranslator.TranslateRequest(from, to, baseModel, originalPayload, true)	body := sdktranslator.TranslateRequest(from, to, baseModel, bytes.Clone(req.Payload), true) 	// Strip kimi- prefix for upstream API	upstreamModel := stripKimiPrefix(baseModel)	body, err = sjson.SetBytes(body, "model", upstreamModel)	if err != nil {		return nil, fmt.Errorf("kimi executor: failed to set model in payload: %w", err)	} 	body, err = thinking.ApplyThinking(body, req.Model, from.String(), "kimi", e.Identifier())	if err != nil {		return nil, err	} 	body, err = sjson.SetBytes(body, "stream_options.include_usage", true)	if err != nil {		return nil, fmt.Errorf("kimi executor: failed to set stream_options in payload: %w", err)	}	requestedModel := payloadRequestedModel(opts, req.Model)	body = applyPayloadConfigWithRoot(e.cfg, baseModel, to.String(), "", body, originalTranslated, requestedModel) 	url := kimiauth.KimiAPIBaseURL + "/chat/completions"	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))	if err != nil {		return nil, err	}	applyKimiHeadersWithAuth(httpReq, token, true, auth)	var authID, authLabel, authType, authValue string	if auth != nil {		authID = auth.ID		authLabel = auth.Label		authType, authValue = auth.AccountInfo()	}	recordAPIRequest(ctx, e.cfg, upstreamRequestLog{		URL:       url,		Method:    http.MethodPost,		Headers:   httpReq.Header.Clone(),		Body:      body,		Provider:  e.Identifier(),		AuthID:    authID,		AuthLabel: authLabel,		AuthType:  authType,		AuthValue: authValue,	}) 	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)	httpResp, err := httpClient.Do(httpReq)	if err != nil {		recordAPIResponseError(ctx, e.cfg, err)		return nil, err	}	recordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {		b, _ := io.ReadAll(httpResp.Body)		appendAPIResponseChunk(ctx, e.cfg, b)		logWithRequestID(ctx).Debugf("request error, error status: %d, error message: %s", httpResp.StatusCode, summarizeErrorBody(httpResp.Header.Get("Content-Type"), b))		if errClose := httpResp.Body.Close(); errClose != nil {			log.Errorf("kimi executor: close response body error: %v", errClose)		}		err = statusErr{code: httpResp.StatusCode, msg: string(b)}		return nil, err	}	out := make(chan cliproxyexecutor.StreamChunk)	stream = out	go func() {		defer close(out)		defer func() {			if errClose := httpResp.Body.Close(); errClose != nil {				log.Errorf("kimi executor: close response body error: %v", errClose)			}		}()		scanner := bufio.NewScanner(httpResp.Body)		scanner.Buffer(nil, 1_048_576) // 1MB		var param any		for scanner.Scan() {			line := scanner.Bytes()			appendAPIResponseChunk(ctx, e.cfg, line)			if detail, ok := parseOpenAIStreamUsage(line); ok {				reporter.publish(ctx, detail)			}			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, bytes.Clone(opts.OriginalRequest), body, bytes.Clone(line), &param)			for i := range chunks {				out <- cliproxyexecutor.StreamChunk{Payload: []byte(chunks[i])}			}		}		doneChunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, bytes.Clone(opts.OriginalRequest), body, bytes.Clone([]byte("[DONE]")), &param)		for i := range doneChunks {			out <- cliproxyexecutor.StreamChunk{Payload: []byte(doneChunks[i])}		}		if errScan := scanner.Err(); errScan != nil {			recordAPIResponseError(ctx, e.cfg, errScan)			reporter.publishFailure(ctx)			out <- cliproxyexecutor.StreamChunk{Err: errScan}		}	}()	return stream, nil} // CountTokens estimates token count for Kimi requests.func (e *KimiExecutor) CountTokens(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {	baseModel := thinking.ParseSuffix(req.Model).ModelName 	from := opts.SourceFormat	to := sdktranslator.FromString("openai")	body := sdktranslator.TranslateRequest(from, to, baseModel, bytes.Clone(req.Payload), false) 	// Use a generic tokenizer for estimation	enc, err := tokenizerForModel("gpt-4")	if err != nil {		return cliproxyexecutor.Response{}, fmt.Errorf("kimi executor: tokenizer init failed: %w", err)	} 	count, err := countOpenAIChatTokens(enc, body)	if err != nil {		return cliproxyexecutor.Response{}, fmt.Errorf("kimi executor: token counting failed: %w", err)	} 	usageJSON := buildOpenAIUsageJSON(count)	translated := sdktranslator.TranslateTokenCount(ctx, to, from, count, usageJSON)	return cliproxyexecutor.Response{Payload: []byte(translated)}, nil} // Refresh refreshes the Kimi token using the refresh token.func (e *KimiExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*cliproxyauth.Auth, error) {	log.Debugf("kimi executor: refresh called")	if auth == nil {		return nil, fmt.Errorf("kimi executor: auth is nil")	}	// Expect refresh_token in metadata for OAuth-based accounts	var refreshToken string	if auth.Metadata != nil {		if v, ok := auth.Metadata["refresh_token"].(string); ok && strings.TrimSpace(v) != "" {			refreshToken = v		}	}	if strings.TrimSpace(refreshToken) == "" {		// Nothing to refresh		return auth, nil	} 	client := kimiauth.NewDeviceFlowClientWithDeviceID(e.cfg, resolveKimiDeviceID(auth))	td, err := client.RefreshToken(ctx, refreshToken)	if err != nil {		return nil, err	}	if auth.Metadata == nil {		auth.Metadata = make(map[string]any)	}	auth.Metadata["access_token"] = td.AccessToken	if td.RefreshToken != "" {		auth.Metadata["refresh_token"] = td.RefreshToken	}	if td.ExpiresAt > 0 {		exp := time.Unix(td.ExpiresAt, 0).UTC().Format(time.RFC3339)		auth.Metadata["expired"] = exp	}	auth.Metadata["type"] = "kimi"	now := time.Now().Format(time.RFC3339)	auth.Metadata["last_refresh"] = now	return auth, nil} // applyKimiHeaders sets required headers for Kimi API requests.// Headers match kimi-cli client for compatibility.func applyKimiHeaders(r *http.Request, token string, stream bool) {	r.Header.Set("Content-Type", "application/json")	r.Header.Set("Authorization", "Bearer "+token)	// Match kimi-cli headers exactly	r.Header.Set("User-Agent", "KimiCLI/1.10.6")	r.Header.Set("X-Msh-Platform", "kimi_cli")	r.Header.Set("X-Msh-Version", "1.10.6")	r.Header.Set("X-Msh-Device-Name", getKimiHostname())	r.Header.Set("X-Msh-Device-Model", getKimiDeviceModel())	r.Header.Set("X-Msh-Device-Id", getKimiDeviceID())	if stream {		r.Header.Set("Accept", "text/event-stream")		return	}	r.Header.Set("Accept", "application/json")} func resolveKimiDeviceIDFromAuth(auth *cliproxyauth.Auth) string {	if auth == nil || auth.Metadata == nil {		return ""	} 	deviceIDRaw, ok := auth.Metadata["device_id"]	if !ok {		return ""	} 	deviceID, ok := deviceIDRaw.(string)	if !ok {		return ""	} 	return strings.TrimSpace(deviceID)} func resolveKimiDeviceIDFromStorage(auth *cliproxyauth.Auth) string {	if auth == nil {		return ""	} 	storage, ok := auth.Storage.(*kimiauth.KimiTokenStorage)	if !ok || storage == nil {		return ""	} 	return strings.TrimSpace(storage.DeviceID)} func resolveKimiDeviceID(auth *cliproxyauth.Auth) string {	deviceID := resolveKimiDeviceIDFromAuth(auth)	if deviceID != "" {		return deviceID	}	return resolveKimiDeviceIDFromStorage(auth)} func applyKimiHeadersWithAuth(r *http.Request, token string, stream bool, auth *cliproxyauth.Auth) {	applyKimiHeaders(r, token, stream) 	if deviceID := resolveKimiDeviceID(auth); deviceID != "" {		r.Header.Set("X-Msh-Device-Id", deviceID)	}} // getKimiHostname returns the machine hostname.func getKimiHostname() string {	hostname, err := os.Hostname()	if err != nil {		return "unknown"	}	return hostname} // getKimiDeviceModel returns a device model string matching kimi-cli format.func getKimiDeviceModel() string {	return fmt.Sprintf("%s %s", runtime.GOOS, runtime.GOARCH)} // getKimiDeviceID returns a stable device ID, matching kimi-cli storage location.func getKimiDeviceID() string {	homeDir, err := os.UserHomeDir()	if err != nil {		return "cli-proxy-api-device"	}	// Check kimi-cli's device_id location first (platform-specific)	var kimiShareDir string	switch runtime.GOOS {	case "darwin":		kimiShareDir = filepath.Join(homeDir, "Library", "Application Support", "kimi")	case "windows":		appData := os.Getenv("APPDATA")		if appData == "" {			appData = filepath.Join(homeDir, "AppData", "Roaming")		}		kimiShareDir = filepath.Join(appData, "kimi")	default: // linux and other unix-like		kimiShareDir = filepath.Join(homeDir, ".local", "share", "kimi")	}	deviceIDPath := filepath.Join(kimiShareDir, "device_id")	if data, err := os.ReadFile(deviceIDPath); err == nil {		return strings.TrimSpace(string(data))	}	return "cli-proxy-api-device"} // kimiCreds extracts the access token from auth.func kimiCreds(a *cliproxyauth.Auth) (token string) {	if a == nil {		return ""	}	// Check metadata first (OAuth flow stores tokens here)	if a.Metadata != nil {		if v, ok := a.Metadata["access_token"].(string); ok && strings.TrimSpace(v) != "" {			return v		}	}	// Fallback to attributes (API key style)	if a.Attributes != nil {		if v := a.Attributes["access_token"]; v != "" {			return v		}		if v := a.Attributes["api_key"]; v != "" {			return v		}	}	return ""} // stripKimiPrefix removes the "kimi-" prefix from model names for the upstream API.func stripKimiPrefix(model string) string {	model = strings.TrimSpace(model)	if strings.HasPrefix(strings.ToLower(model), "kimi-") {		return model[5:]	}	return model}