feat: improve simulation media tasks

apps/api/internal/clients/clients_test.go

@@ -7,10 +7,96 @@ import (
 	"net/http/httptest"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
 )
 
+func TestSimulationClientReturnsImageDemoAssets(t *testing.T) {
+	response, err := (SimulationClient{}).Run(context.Background(), Request{
+		Kind:  "images.generations",
+		Model: "gpt-image-1",
+		Body: map[string]any{
+			"prompt":               "demo image",
+			"n":                    2,
+			"simulationDurationMs": 5,
+		},
+		Candidate: store.RuntimeModelCandidate{Provider: "simulation"},
+	})
+	if err != nil {
+		t.Fatalf("run simulation image client: %v", err)
+	}
+	data, _ := response.Result["data"].([]any)
+	if len(data) != 2 || response.ResponseDurationMS <= 0 {
+		t.Fatalf("unexpected simulated image response: %+v duration=%d", response.Result, response.ResponseDurationMS)
+	}
+	item, _ := data[0].(map[string]any)
+	if item["url"] != "/static/simulation/image.svg" || item["assetSource"] != "simulation" {
+		t.Fatalf("unexpected simulated image item: %+v", item)
+	}
+}
+
+func TestSimulationClientReturnsVideoDemoAssets(t *testing.T) {
+	response, err := (SimulationClient{}).Run(context.Background(), Request{
+		Kind:      "videos.generations",
+		ModelType: "video_generate",
+		Model:     "demo-video-model",
+		Body: map[string]any{
+			"prompt":               "demo video",
+			"count":                2,
+			"duration":             6,
+			"simulationDurationMs": 5,
+		},
+		Candidate: store.RuntimeModelCandidate{Provider: "simulation"},
+	})
+	if err != nil {
+		t.Fatalf("run simulation video client: %v", err)
+	}
+	data, _ := response.Result["data"].([]any)
+	if len(data) != 2 || response.ResponseDurationMS <= 0 {
+		t.Fatalf("unexpected simulated video response: %+v duration=%d", response.Result, response.ResponseDurationMS)
+	}
+	item, _ := data[0].(map[string]any)
+	if item["video_url"] != "/static/simulation/video.mp4" || item["url"] != "/static/simulation/video.mp4" || item["poster"] != "/static/simulation/video-poster.svg" {
+		t.Fatalf("unexpected simulated video item: %+v", item)
+	}
+	if item["duration"] != 6 || item["assetSource"] != "simulation" {
+		t.Fatalf("unexpected simulated video metadata: %+v", item)
+	}
+}
+
+func TestSimulationDurationDefaultsByMediaType(t *testing.T) {
+	imageDuration := simulationDuration(Request{Kind: "images.generations"})
+	if imageDuration < 10*time.Second || imageDuration > 30*time.Second {
+		t.Fatalf("image simulation duration should default to 10-30s, got %s", imageDuration)
+	}
+	videoDuration := simulationDuration(Request{Kind: "videos.generations"})
+	if videoDuration < 2*time.Minute || videoDuration > 3*time.Minute {
+		t.Fatalf("video simulation duration should default to 2-3m, got %s", videoDuration)
+	}
+	textDuration := simulationDuration(Request{Kind: "chat.completions"})
+	if textDuration < 800*time.Millisecond || textDuration > 2400*time.Millisecond {
+		t.Fatalf("text simulation duration should keep short defaults, got %s", textDuration)
+	}
+}
+
+func TestSimulationDurationCanBeControlledByParams(t *testing.T) {
+	fixedDuration := simulationDuration(Request{Body: map[string]any{"simulationDurationSeconds": 7}})
+	if fixedDuration != 7*time.Second {
+		t.Fatalf("simulationDurationSeconds should set fixed duration, got %s", fixedDuration)
+	}
+	rangeDuration := simulationDuration(Request{
+		Kind: "videos.generations",
+		Body: map[string]any{
+			"simulationMinDurationSeconds": 1,
+			"simulationMaxDurationSeconds": 1,
+		},
+	})
+	if rangeDuration != time.Second {
+		t.Fatalf("simulation duration range params should override video defaults, got %s", rangeDuration)
+	}
+}
+
 func TestOpenAIClientChatContract(t *testing.T) {
 	var gotPath string
 	var gotAuth string

apps/api/internal/clients/simulation.go

@@ -3,24 +3,60 @@ package clients
 import (
 	"context"
 	"fmt"
+	"math/rand"
 	"strings"
 	"time"
 )
 
 type SimulationClient struct{}
 
+const (
+	defaultSimulationTextMinDuration  = 800 * time.Millisecond
+	defaultSimulationTextMaxDuration  = 2400 * time.Millisecond
+	defaultSimulationImageMinDuration = 10 * time.Second
+	defaultSimulationImageMaxDuration = 30 * time.Second
+	defaultSimulationVideoMinDuration = 2 * time.Minute
+	defaultSimulationVideoMaxDuration = 3 * time.Minute
+	maxSimulationDuration             = 10 * time.Minute
+)
+
 func (c SimulationClient) Run(ctx context.Context, request Request) (Response, error) {
-	_ = ctx
 	profile := simulationProfile(request)
+	responseStartedAt := time.Now()
+	duration := simulationDuration(request)
+	if duration > 0 {
+		timer := time.NewTimer(duration)
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			return Response{}, ctx.Err()
+		case <-timer.C:
+		}
+	}
+	responseFinishedAt := time.Now()
 	if profile == "retryable_failure" {
-		return Response{}, &ClientError{Code: "server_error", Message: "simulated retryable failure", Retryable: true}
+		return Response{}, &ClientError{
+			Code:               "server_error",
+			Message:            "simulated retryable failure",
+			RequestID:          "simulated-request",
+			ResponseStartedAt:  responseStartedAt,
+			ResponseFinishedAt: responseFinishedAt,
+			ResponseDurationMS: responseDurationMS(responseStartedAt, responseFinishedAt),
+			Retryable:          true,
+		}
 	}
 	if profile == "fatal_failure" || profile == "non_retryable_failure" {
-		return Response{}, &ClientError{Code: "bad_request", Message: "simulated non-retryable failure", Retryable: false}
+		return Response{}, &ClientError{
+			Code:               "bad_request",
+			Message:            "simulated non-retryable failure",
+			RequestID:          "simulated-request",
+			ResponseStartedAt:  responseStartedAt,
+			ResponseFinishedAt: responseFinishedAt,
+			ResponseDurationMS: responseDurationMS(responseStartedAt, responseFinishedAt),
+			Retryable:          false,
+		}
 	}
-	responseStartedAt := time.Now()
 	result := simulatedResult(request)
-	responseFinishedAt := time.Now()
 	return Response{
 		Result:             result,
 		RequestID:          requestIDFromResult(result),
@@ -80,24 +116,73 @@ func simulatedResult(request Request) map[string]any {
 			"id":      "img-edit-simulated",
 			"created": nowUnix(),
 			"model":   request.Model,
-			"data": []any{map[string]any{
+			"data":    simulatedImageData(request, "/static/simulation/image-edit.svg", "simulation image edit"),
-				"url":            "/static/simulation/image-edit.png",
-				"revised_prompt": firstNonEmptyPrompt(request.Body, "simulation image edit"),
-			}},
 		}
-	default:
+	case "images.generations":
 		return map[string]any{
 			"id":      "img-simulated",
 			"created": nowUnix(),
 			"model":   request.Model,
-			"data": []any{map[string]any{
+			"data":    simulatedImageData(request, "/static/simulation/image.svg", "simulation image"),
-				"url":            "/static/simulation/image.png",
+		}
-				"revised_prompt": firstNonEmptyPrompt(request.Body, "simulation image"),
+	case "videos.generations":
-			}},
+		return map[string]any{
+			"id":      "video-simulated",
+			"created": nowUnix(),
+			"model":   request.Model,
+			"data":    simulatedVideoData(request),
+		}
+	default:
+		modelType := strings.ToLower(request.ModelType)
+		kind := strings.ToLower(request.Kind)
+		if strings.Contains(modelType, "video") || strings.Contains(kind, "video") {
+			return map[string]any{
+				"id":      "video-simulated",
+				"created": nowUnix(),
+				"model":   request.Model,
+				"data":    simulatedVideoData(request),
+			}
+		}
+		return map[string]any{
+			"id":      "img-simulated",
+			"created": nowUnix(),
+			"model":   request.Model,
+			"data":    simulatedImageData(request, "/static/simulation/image.svg", "simulation image"),
 		}
 	}
 }
 
+func simulatedImageData(request Request, url string, fallbackPrompt string) []any {
+	count := simulatedOutputCount(request.Body)
+	items := make([]any, 0, count)
+	for index := 0; index < count; index += 1 {
+		items = append(items, map[string]any{
+			"url":            url,
+			"assetSource":    "simulation",
+			"index":          index,
+			"revised_prompt": firstNonEmptyPrompt(request.Body, fallbackPrompt),
+		})
+	}
+	return items
+}
+
+func simulatedVideoData(request Request) []any {
+	count := simulatedOutputCount(request.Body)
+	items := make([]any, 0, count)
+	for index := 0; index < count; index += 1 {
+		items = append(items, map[string]any{
+			"url":            "/static/simulation/video.mp4",
+			"video_url":      "/static/simulation/video.mp4",
+			"poster":         "/static/simulation/video-poster.svg",
+			"duration":       simulatedVideoDurationSeconds(request),
+			"assetSource":    "simulation",
+			"index":          index,
+			"revised_prompt": firstNonEmptyPrompt(request.Body, "simulation video"),
+		})
+	}
+	return items
+}
+
 func simulatedUsage(request Request) Usage {
 	if request.ModelType == "chat" || request.Kind == "responses" {
 		return Usage{InputTokens: 12, OutputTokens: 8, TotalTokens: 20}
@@ -117,6 +202,117 @@ func simulatedProgress(request Request) []Progress {
 	}
 }
 
+func simulationDuration(request Request) time.Duration {
+	if fixedMS := simulationDurationMS(request, "simulationDurationMs", "testDurationMs"); fixedMS >= 0 {
+		return clampSimulationDuration(time.Duration(fixedMS) * time.Millisecond)
+	}
+	if fixedSeconds := simulationDurationSeconds(request, "simulationDurationSeconds", "testDurationSeconds"); fixedSeconds >= 0 {
+		return clampSimulationDuration(time.Duration(fixedSeconds) * time.Second)
+	}
+	minDuration, maxDuration := defaultSimulationDurationRange(request)
+	if minMS := simulationDurationMS(request, "simulationMinDurationMs", "simulationDurationMinMs", "testMinDurationMs", "testDurationMinMs"); minMS >= 0 {
+		minDuration = time.Duration(minMS) * time.Millisecond
+	}
+	if maxMS := simulationDurationMS(request, "simulationMaxDurationMs", "simulationDurationMaxMs", "testMaxDurationMs", "testDurationMaxMs"); maxMS >= 0 {
+		maxDuration = time.Duration(maxMS) * time.Millisecond
+	}
+	if minSeconds := simulationDurationSeconds(request, "simulationMinDurationSeconds", "simulationDurationMinSeconds", "testMinDurationSeconds", "testDurationMinSeconds"); minSeconds >= 0 {
+		minDuration = time.Duration(minSeconds) * time.Second
+	}
+	if maxSeconds := simulationDurationSeconds(request, "simulationMaxDurationSeconds", "simulationDurationMaxSeconds", "testMaxDurationSeconds", "testDurationMaxSeconds"); maxSeconds >= 0 {
+		maxDuration = time.Duration(maxSeconds) * time.Second
+	}
+	minDuration = clampSimulationDuration(minDuration)
+	maxDuration = clampSimulationDuration(maxDuration)
+	if maxDuration < minDuration {
+		maxDuration = minDuration
+	}
+	spread := maxDuration - minDuration
+	if spread <= 0 {
+		return minDuration
+	}
+	return minDuration + time.Duration(rand.Int63n(int64(spread)+1))
+}
+
+func defaultSimulationDurationRange(request Request) (time.Duration, time.Duration) {
+	if simulationVideoRequest(request) {
+		return defaultSimulationVideoMinDuration, defaultSimulationVideoMaxDuration
+	}
+	if simulationImageRequest(request) {
+		return defaultSimulationImageMinDuration, defaultSimulationImageMaxDuration
+	}
+	return defaultSimulationTextMinDuration, defaultSimulationTextMaxDuration
+}
+
+func simulationVideoRequest(request Request) bool {
+	kind := strings.ToLower(request.Kind)
+	modelType := strings.ToLower(request.ModelType)
+	return strings.Contains(kind, "video") || strings.Contains(modelType, "video")
+}
+
+func simulationImageRequest(request Request) bool {
+	kind := strings.ToLower(request.Kind)
+	modelType := strings.ToLower(request.ModelType)
+	return strings.Contains(kind, "image") || strings.Contains(modelType, "image")
+}
+
+func simulationDurationSeconds(request Request, keys ...string) int {
+	for _, source := range []map[string]any{request.Body, request.Candidate.PlatformConfig, request.Candidate.Credentials} {
+		for _, key := range keys {
+			value := intValue(source, key, -1)
+			if value >= 0 {
+				return value
+			}
+		}
+	}
+	return -1
+}
+
+func simulationDurationMS(request Request, keys ...string) int {
+	for _, source := range []map[string]any{request.Body, request.Candidate.PlatformConfig, request.Candidate.Credentials} {
+		for _, key := range keys {
+			value := intValue(source, key, -1)
+			if value >= 0 {
+				return value
+			}
+		}
+	}
+	return -1
+}
+
+func clampSimulationDuration(duration time.Duration) time.Duration {
+	if duration < 0 {
+		return 0
+	}
+	if duration > maxSimulationDuration {
+		return maxSimulationDuration
+	}
+	return duration
+}
+
+func simulatedOutputCount(body map[string]any) int {
+	count := intValue(body, "n", 0)
+	if count <= 0 {
+		count = intValue(body, "count", 0)
+	}
+	if count <= 0 {
+		return 1
+	}
+	if count > 20 {
+		return 20
+	}
+	return count
+}
+
+func simulatedVideoDurationSeconds(request Request) int {
+	for _, key := range []string{"duration", "duration_seconds", "durationSeconds"} {
+		if value := intValue(request.Body, key, 0); value > 0 {
+			return value
+		}
+	}
+	return 5
+}
+
 func firstNonEmptyPrompt(body map[string]any, fallback string) string {
 	for _, key := range []string{"prompt", "input"} {
 		if value := strings.TrimSpace(stringValue(body, key)); value != "" {

apps/api/internal/httpapi/core_flow_integration_test.go

@@ -248,10 +248,11 @@ VALUES ($1, 5, '{"purpose":"core-flow"}'::jsonb)`, inviteCode); err != nil {
 		} `json:"task"`
 	}
 	doJSON(t, server.URL, http.MethodPost, "/api/v1/chat/completions", apiKeyResponse.Secret, map[string]any{
-		"model":      "gpt-4o-mini",
+		"model":                "gpt-4o-mini",
-		"runMode":    "simulation",
+		"runMode":              "simulation",
-		"simulation": true,
+		"simulation":           true,
-		"messages":   []map[string]any{{"role": "user", "content": "ping"}},
+		"simulationDurationMs": 5,
+		"messages":             []map[string]any{{"role": "user", "content": "ping"}},
 	}, http.StatusAccepted, &taskResponse)
 	if taskResponse.Task.ID == "" || taskResponse.Task.Status != "succeeded" || taskResponse.Task.RunMode != "simulation" {
 		t.Fatalf("unexpected task response: %+v", taskResponse.Task)
@@ -271,10 +272,11 @@ VALUES ($1, 5, '{"purpose":"core-flow"}'::jsonb)`, inviteCode); err != nil {
 
 	var compatChat map[string]any
 	doJSON(t, server.URL, http.MethodPost, "/v1/chat/completions", apiKeyResponse.Secret, map[string]any{
-		"model":      "gpt-4o-mini",
+		"model":                "gpt-4o-mini",
-		"runMode":    "simulation",
+		"runMode":              "simulation",
-		"messages":   []map[string]any{{"role": "user", "content": "ping"}},
+		"messages":             []map[string]any{{"role": "user", "content": "ping"}},
-		"simulation": true,
+		"simulation":           true,
+		"simulationDurationMs": 5,
 	}, http.StatusOK, &compatChat)
 	if compatChat["object"] != "chat.completion" {
 		t.Fatalf("unexpected compatible chat response: %+v", compatChat)
@@ -288,12 +290,13 @@ VALUES ($1, 5, '{"purpose":"core-flow"}'::jsonb)`, inviteCode); err != nil {
 		} `json:"task"`
 	}
 	doJSON(t, server.URL, http.MethodPost, "/api/v1/images/generations", apiKeyResponse.Secret, map[string]any{
-		"model":      "gpt-image-1",
+		"model":                "gpt-image-1",
-		"runMode":    "simulation",
+		"runMode":              "simulation",
-		"prompt":     "a tiny gateway console",
+		"prompt":               "a tiny gateway console",
-		"size":       "1024x1024",
+		"size":                 "1024x1024",
-		"quality":    "medium",
+		"quality":              "medium",
-		"simulation": true,
+		"simulation":           true,
+		"simulationDurationMs": 5,
 	}, http.StatusAccepted, &imageResponse)
 	if imageResponse.Task.Status != "succeeded" || imageResponse.Task.Result["id"] == "" {
 		t.Fatalf("unexpected image generation task: %+v", imageResponse.Task)
@@ -307,12 +310,13 @@ VALUES ($1, 5, '{"purpose":"core-flow"}'::jsonb)`, inviteCode); err != nil {
 		} `json:"task"`
 	}
 	doJSON(t, server.URL, http.MethodPost, "/api/v1/images/edits", apiKeyResponse.Secret, map[string]any{
-		"model":      "gpt-image-1",
+		"model":                "gpt-image-1",
-		"runMode":    "simulation",
+		"runMode":              "simulation",
-		"prompt":     "replace background with clean studio light",
+		"prompt":               "replace background with clean studio light",
-		"image":      "https://example.com/source.png",
+		"image":                "https://example.com/source.png",
-		"mask":       "https://example.com/mask.png",
+		"mask":                 "https://example.com/mask.png",
-		"simulation": true,
+		"simulation":           true,
+		"simulationDurationMs": 5,
 	}, http.StatusAccepted, &imageEditResponse)
 	if imageEditResponse.Task.Status != "succeeded" || imageEditResponse.Task.Result["id"] == "" {
 		t.Fatalf("unexpected image edit task: %+v", imageEditResponse.Task)

apps/api/internal/httpapi/server.go

@@ -32,6 +32,7 @@ func NewServer(cfg config.Config, db *store.Store, logger *slog.Logger) http.Han
 	mux := http.NewServeMux()
 	mux.HandleFunc("GET /healthz", server.health)
 	mux.HandleFunc("GET /readyz", server.ready)
+	mux.HandleFunc("GET /static/simulation/{asset}", serveSimulationAsset)
 
 	mux.Handle("POST /api/v1/auth/register", server.auth.Require(auth.PermissionPublic, http.HandlerFunc(server.register)))
 	mux.Handle("POST /api/v1/auth/login", server.auth.Require(auth.PermissionPublic, http.HandlerFunc(server.login)))

apps/api/internal/httpapi/simulation_assets.go

@@ -0,0 +1,49 @@
+package httpapi
+
+import (
+	"bytes"
+	"encoding/base64"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const simulationImageSVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024"><defs><linearGradient id="g" x1="0" x2="1" y1="0" y2="1"><stop stop-color="#111827"/><stop offset="0.52" stop-color="#2563eb"/><stop offset="1" stop-color="#14b8a6"/></linearGradient></defs><rect width="1024" height="1024" rx="96" fill="url(#g)"/><circle cx="784" cy="220" r="104" fill="#ffffff" opacity="0.16"/><rect x="168" y="260" width="688" height="504" rx="48" fill="#ffffff" opacity="0.15"/><path d="M232 672 392 504l120 120 96-104 184 152v48H232z" fill="#ffffff" opacity="0.72"/><circle cx="354" cy="398" r="58" fill="#ffffff" opacity="0.82"/><text x="512" y="832" text-anchor="middle" font-family="Inter,Arial,sans-serif" font-size="64" font-weight="700" fill="#ffffff">EasyAI Demo</text></svg>`
+
+const simulationImageEditSVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024"><defs><linearGradient id="g" x1="0" x2="1" y1="0" y2="1"><stop stop-color="#0f172a"/><stop offset="0.48" stop-color="#7c3aed"/><stop offset="1" stop-color="#f97316"/></linearGradient></defs><rect width="1024" height="1024" rx="96" fill="url(#g)"/><rect x="168" y="208" width="456" height="608" rx="44" fill="#ffffff" opacity="0.16"/><rect x="400" y="304" width="456" height="512" rx="44" fill="#ffffff" opacity="0.22"/><path d="M248 678 382 532l92 100 78-84 232 198H248z" fill="#ffffff" opacity="0.76"/><circle cx="342" cy="384" r="54" fill="#ffffff" opacity="0.84"/><text x="512" y="884" text-anchor="middle" font-family="Inter,Arial,sans-serif" font-size="58" font-weight="700" fill="#ffffff">EasyAI Edit Demo</text></svg>`
+
+const simulationVideoPosterSVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 720"><defs><linearGradient id="g" x1="0" x2="1" y1="0" y2="1"><stop stop-color="#111827"/><stop offset="0.5" stop-color="#0ea5e9"/><stop offset="1" stop-color="#22c55e"/></linearGradient></defs><rect width="1280" height="720" fill="url(#g)"/><circle cx="1000" cy="170" r="120" fill="#fff" opacity="0.16"/><path d="M548 250v220l190-110z" fill="#fff" opacity="0.9"/><text x="640" y="602" text-anchor="middle" font-family="Inter,Arial,sans-serif" font-size="64" font-weight="700" fill="#ffffff">EasyAI Video Demo</text></svg>`
+
+const simulationVideoMP4Base64 = "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"
+
+var simulationVideoMP4 = mustDecodeSimulationAsset(simulationVideoMP4Base64)
+
+func serveSimulationAsset(w http.ResponseWriter, r *http.Request) {
+	asset := strings.ToLower(strings.TrimSpace(r.PathValue("asset")))
+	switch asset {
+	case "image.svg", "image.png":
+		serveSimulationContent(w, r, "image.svg", "image/svg+xml; charset=utf-8", []byte(simulationImageSVG))
+	case "image-edit.svg", "image-edit.png":
+		serveSimulationContent(w, r, "image-edit.svg", "image/svg+xml; charset=utf-8", []byte(simulationImageEditSVG))
+	case "video-poster.svg":
+		serveSimulationContent(w, r, "video-poster.svg", "image/svg+xml; charset=utf-8", []byte(simulationVideoPosterSVG))
+	case "video.mp4":
+		serveSimulationContent(w, r, "video.mp4", "video/mp4", simulationVideoMP4)
+	default:
+		http.NotFound(w, r)
+	}
+}
+
+func serveSimulationContent(w http.ResponseWriter, r *http.Request, name string, contentType string, payload []byte) {
+	w.Header().Set("Cache-Control", "public, max-age=3600")
+	w.Header().Set("Content-Type", contentType)
+	http.ServeContent(w, r, name, time.Time{}, bytes.NewReader(payload))
+}
+
+func mustDecodeSimulationAsset(value string) []byte {
+	decoded, err := base64.StdEncoding.DecodeString(value)
+	if err != nil {
+		panic(err)
+	}
+	return decoded
+}