package executor import (	"bufio"	"bytes"	"context"	"errors"	"fmt"	"io"	"net/http"	"time" 	"github.com/router-for-me/CLIProxyAPI/v7/internal/runtime/executor/helps"	"github.com/router-for-me/CLIProxyAPI/v7/internal/thinking"	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/executor"	sdktranslator "github.com/router-for-me/CLIProxyAPI/v7/sdk/translator"	log "github.com/sirupsen/logrus"	"github.com/tidwall/sjson") // ExecuteStream performs a streaming request to the Antigravity API.func (e *AntigravityExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (_ *cliproxyexecutor.StreamResult, err error) {	if opts.Alt == "responses/compact" {		return nil, statusErr{code: http.StatusNotImplemented, msg: "/responses/compact not supported"}	}	baseModel := thinking.ParseSuffix(req.Model).ModelName 	ctx = context.WithValue(ctx, "alt", "")	if inCooldown, remaining, errCooldown := antigravityIsInShortCooldownRequired(ctx, auth, baseModel, time.Now()); errCooldown != nil {		return nil, homeKVUnavailableStatusErr(errCooldown)	} else if inCooldown && !antigravityShouldBypassShortCooldown(ctx, e.cfg) {		log.Debugf("antigravity executor: auth %s in short cooldown for model %s (%s remaining), returning 429 to switch auth", auth.ID, baseModel, remaining)		d := remaining		return nil, statusErr{code: http.StatusTooManyRequests, msg: fmt.Sprintf("auth in short cooldown, %s remaining", remaining), retryAfter: &d}	} 	reporter := helps.NewExecutorUsageReporter(ctx, e, baseModel, auth)	defer reporter.TrackFailure(ctx, &err) 	from := opts.SourceFormat	responseFormat := cliproxyexecutor.ResponseFormatOrSource(opts)	to := sdktranslator.FromString("antigravity") 	originalPayloadSource := req.Payload	if len(opts.OriginalRequest) > 0 {		originalPayloadSource = opts.OriginalRequest	}	originalPayload := originalPayloadSource	originalPayload, errValidate := validateAntigravityRequestSignatures(ctx, baseModel, from, originalPayload)	if errValidate != nil {		return nil, errValidate	}	req.Payload = originalPayload	token, updatedAuth, errToken := e.ensureAccessToken(ctx, auth)	if errToken != nil {		return nil, errToken	}	if updatedAuth != nil {		auth = updatedAuth		reporter.UpdateAccessTokenFingerprint(auth)	} 	originalTranslated, translated := helps.TranslateRequestPairWithCodexMultiAgentV2(ctx, opts.Headers, e.cfg, from, to, baseModel, originalPayload, req.Payload, true) 	translated, err = helps.ApplyThinkingWithSourcePayload(translated, req.Payload, originalPayloadSource, req.Model, from.String(), to.String(), e.Identifier())	if err != nil {		return nil, err	} 	requestedModel := helps.PayloadRequestedModel(opts, req.Model)	requestPath := helps.PayloadRequestPath(opts)	translated = helps.ApplyPayloadConfigWithRequest(e.cfg, baseModel, "antigravity", from.String(), "request", translated, originalTranslated, requestedModel, requestPath, opts.Headers)	translated = e.obfuscateSensitiveWords(translated)	translated = sanitizeAntigravityGeminiRequestSignatures(baseModel, translated)	translated, _ = sjson.DeleteBytes(translated, "request.stream")	reporter.SetTranslatedReasoningEffort(translated, to.String()) 	useCredits := cliproxyauth.AntigravityCreditsRequested(ctx) && antigravityCreditsRetryEnabled(e.cfg) 	baseURL := resolveAntigravityRequestBaseURL(auth)	httpClient := newAntigravityHTTPClient(ctx, e.cfg, auth, 0)	httpClient = reporter.TrackHTTPClient(httpClient) 	// Credential retry rounds are owned by the conductor. Perform one upstream	// request per credential so request-retry is not consumed twice.	requestPayload := translated	if useCredits {		if cp := injectEnabledCreditTypes(translated); len(cp) > 0 {			requestPayload = cp			helps.MarkCreditsUsed(ctx)		}	}	replayScope := antigravityReasoningReplayScope{}	if antigravityUsesReasoningReplayCache(baseModel) {		var errReplay error		requestPayload, replayScope, errReplay = prepareAntigravityGeminiReasoningReplayPayload(ctx, baseModel, req, opts, requestPayload)		if errReplay != nil {			err = errReplay			return nil, err		}	}	requestPayload = ensureAntigravityGeminiLeadingUserContent(baseModel, requestPayload)	httpReq, errReq := e.buildRequest(ctx, auth, token, baseModel, requestPayload, true, opts.Alt, baseURL, helps.DerivedAntigravitySessionID(opts.Metadata, req.Metadata))	if errReq != nil {		err = errReq		return nil, err	}	httpResp, errDo := httpClient.Do(httpReq)	if errDo != nil {		helps.RecordAPIResponseError(ctx, e.cfg, errDo)		if errors.Is(errDo, context.Canceled) || errors.Is(errDo, context.DeadlineExceeded) {			return nil, errDo		}		err = errDo		return nil, err	}	helps.RecordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())	if httpResp.StatusCode < http.StatusOK || httpResp.StatusCode >= http.StatusMultipleChoices {		bodyBytes, errRead := io.ReadAll(httpResp.Body)		if errClose := httpResp.Body.Close(); errClose != nil {			log.Errorf("antigravity executor: close response body error: %v", errClose)		}		if errRead != nil {			helps.RecordAPIResponseError(ctx, e.cfg, errRead)			if errors.Is(errRead, context.Canceled) || errors.Is(errRead, context.DeadlineExceeded) {				err = errRead				return nil, err			}			if errCtx := ctx.Err(); errCtx != nil {				err = errCtx				return nil, err			}			err = errRead			return nil, err		}		helps.AppendAPIResponseChunk(ctx, e.cfg, bodyBytes)		if httpResp.StatusCode == http.StatusTooManyRequests {			decision := decideAntigravity429(bodyBytes) 			switch decision.kind {			case antigravity429DecisionShortCooldownSwitchAuth:				if decision.retryAfter != nil && *decision.retryAfter > 0 {					if errMarkCooldown := markAntigravityShortCooldownRequired(ctx, auth, baseModel, time.Now(), *decision.retryAfter); errMarkCooldown != nil {						err = homeKVUnavailableStatusErr(errMarkCooldown)						return nil, err					}					log.Debugf("antigravity executor: short quota cooldown (%s) for model %s recorded", *decision.retryAfter, baseModel)				}			case antigravity429DecisionFullQuotaExhausted:				if useCredits && antigravityHasExplicitCreditsBalanceExhaustedReason(bodyBytes) {					markAntigravityCreditsPermanentlyDisabled(auth)				}				// No credits logic - just fall through to error return below			}		} 		if errClear := clearAntigravityReasoningReplayOnInvalidSignature(ctx, replayScope, httpResp.StatusCode, bodyBytes); errClear != nil {			// Report the upstream failure rather than the cleanup failure.			logAntigravityReasoningReplayDegraded(replayScope, "invalidate", errClear)		}		err = newAntigravityStatusErr(httpResp.StatusCode, bodyBytes)		return nil, err	} 	// Stream success	if useCredits {		clearAntigravityCreditsFailureState(auth)	}	replayAccumulator := newAntigravityReasoningReplayAccumulator(replayScope, requestPayload)	out := make(chan cliproxyexecutor.StreamChunk)	go func(resp *http.Response) {		defer close(out)		defer func() {			if errClose := resp.Body.Close(); errClose != nil {				log.Errorf("antigravity executor: close response line error: %v", errClose)			}		}()		scanner := bufio.NewScanner(resp.Body)		scanner.Buffer(nil, streamScannerBuffer)		claudeInputTokens := helps.NewClaudeInputTokenState(from, to, responseFormat, originalPayload)		var param any		for scanner.Scan() {			line := scanner.Bytes()			helps.AppendAPIResponseChunk(ctx, e.cfg, line)			if replayAccumulator != nil {				replayAccumulator.ObserveSSELine(line)			} 			// Filter usage metadata for all models			// Only retain usage statistics in the terminal chunk			line = helps.FilterSSEUsageMetadata(line) 			payload := helps.JSONPayload(line)			if payload == nil {				continue			} 			if detail, ok := helps.ParseAntigravityStreamUsage(payload); ok {				reporter.Publish(ctx, detail)			} 			payload = e.resolveWebSearchGroundingURLs(ctx, auth, from, originalPayload, translated, payload)			chunks := helps.TranslateStreamWithClaudeInputTokens(ctx, to, responseFormat, req.Model, opts.OriginalRequest, translated, bytes.Clone(payload), &param, claudeInputTokens)			for i := range chunks {				select {				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:				case <-ctx.Done():					return				}			}		}		if errScan := scanner.Err(); errScan != nil {			helps.RecordAPIResponseError(ctx, e.cfg, errScan)			reporter.PublishFailure(ctx, errScan)			select {			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:			case <-ctx.Done():			}		} else {			// Only a clean end of stream may produce a synthetic terminal event.			// Translating [DONE] after a read error would report a truncated			// stream as a successful completion.			tail := helps.TranslateStreamWithClaudeInputTokens(ctx, to, responseFormat, req.Model, opts.OriginalRequest, translated, []byte("[DONE]"), &param, claudeInputTokens)			for i := range tail {				select {				case out <- cliproxyexecutor.StreamChunk{Payload: tail[i]}:				case <-ctx.Done():					return				}			}			if replayAccumulator != nil {				replayAccumulator.Commit(ctx)			}			reporter.EnsurePublished(ctx)		}	}(httpResp)	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil}