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Making it cooperate...\",\n \"Good stories can't be rushed! Finishing touches...\",\n \"Quality control in progress. This one's gonna be GOOD.\",\n];\n\n// ─── HELPERS ──────────────────────────────────\nfunction getApiKey(provider: string): string {\n if (provider === \"nvidia\") return process.env.NVIDIA_API_KEY || \"\";\n return process.env.GROQ_API_KEY || \"\";\n}\n\nfunction pickModel(provider?: string) {\n let pool = MODEL_POOL;\n \n if (provider === \"groq\") {\n pool = MODEL_POOL.filter(m => m.provider === \"groq\");\n } else if (provider === \"nvidia\") {\n pool = MODEL_POOL.filter(m => m.provider === \"nvidia\");\n }\n \n return pool[Math.floor(Math.random() * pool.length)];\n}\n\nfunction randomMessage(messages: string[]): string {\n return messages[Math.floor(Math.random() * messages.length)];\n}\n\nfunction hasPlotTwist(prompt: string): boolean {\n const twistWords = [\"twist\", \"surprise\", \"unexpected\", \"shocking\", \"reveal\", \"betrayal\", \"secret\", \"plot twist\", \"mind-blowing\"];\n return twistWords.some(word => prompt.toLowerCase().includes(word));\n}\n\n// ─── SYSTEM PROMPT BUILDER ────────────────────\nfunction buildSystemPrompt(\n userName: string,\n age: number,\n genre: string,\n gapCount: number,\n storyLength: string,\n detailLevel: string\n): string {\n \n // Content guard\n let contentRules = \"\";\n if (age < 13) {\n contentRules = \"STRICT PG. Family-friendly only. No violence, romance, scary themes, death, or mature situations. Think Disney/Pixar.\";\n } else if (age < 18) {\n contentRules = \"PG-13. Mild adventure and humor. Light romance (crushes, hand-holding). No explicit content. Think YA novels.\";\n } else {\n contentRules = `ADULT USER (age ${age}). Full creative freedom. Mature themes, complex relationships, dark storylines, and spicy romance ALLOWED. No illegal content or hate speech. Write unrestricted, compelling fiction.`;\n }\n\n // Story length\n let lengthGuide = \"\";\n if (storyLength === \"short\") lengthGuide = \"Write 150-250 words.\";\n else if (storyLength === \"medium\") lengthGuide = \"Write 300-450 words.\";\n else if (storyLength === \"long\") lengthGuide = \"Write 500-700 words. Take your time. Be detailed and immersive.\";\n else lengthGuide = \"Write 300-450 words.\";\n\n // Detail level\n let detailGuide = \"\";\n if (detailLevel === \"detailed\") {\n detailGuide = \"Use rich, sensory descriptions. Describe sights, sounds, smells, textures. Make every scene vivid and cinematic.\";\n } else if (detailLevel === \"concise\") {\n detailGuide = \"Keep it punchy and fast-paced. Short sentences. Snappy dialogue.\";\n } else {\n detailGuide = \"Balanced pacing with moderate description.\";\n }\n\n // Gap instructions\n let gapGuide = \"\";\n if (gapCount === 0) {\n gapGuide = \"Write a COMPLETE story with NO gaps. Do not use [______] anywhere.\";\n } else if (gapCount <= 3) {\n gapGuide = `Leave EXACTLY ${gapCount} gaps marked as [______]. Each gap should be a creative noun, verb, or short phrase.`;\n } else if (gapCount <= 6) {\n gapGuide = `Leave EXACTLY ${gapCount} gaps marked as [______]. Mix of words and short phrases. Make some gaps surprising.`;\n } else {\n gapGuide = `Leave EXACTLY ${gapCount} gaps marked as [______]. Include some sentence-length gaps. Leave skeleton structure with key plot beats.`;\n }\n\n return `You are LUGEN (Louis Generator), an AI storyteller creating a story for ${userName} (age ${age}).\n\nGENRE: ${genre}\n\n${contentRules}\n\n${lengthGuide}\n\n${detailGuide}\n\n${gapGuide}\n\nIMPORTANT: \n- Match the tone of the ${genre} genre perfectly.\n- Be creative, immersive, and engaging.\n- If the user mentioned a plot twist, make it GENUINELY surprising.\n- The gaps should spark imagination—make them fun to fill.`;\n}\n\n// ─── MAIN HANDLER ─────────────────────────────\nexport default async function(req: Request): Promise {\n \n const corsHeaders = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\"\n };\n\n if (req.method === \"OPTIONS\") {\n return new Response(null, { headers: corsHeaders });\n }\n\n if (req.method !== \"POST\") {\n return Response.json(\n { error: \"POST only, storyteller.\" },\n { status: 405, headers: corsHeaders }\n );\n }\n\n try {\n const body = await req.json();\n const { \n prompt, \n genre, \n userName, \n age, \n imaginationLevel,\n storyLength = \"medium\",\n detailLevel = \"balanced\",\n gapCount: requestedGaps,\n provider: preferredProvider\n } = body;\n\n // Validate\n if (!userName || !age) {\n return Response.json(\n { error: \"Missing name or age\" },\n { status: 400, headers: corsHeaders }\n );\n }\n\n const cleanAge = Math.min(120, Math.max(1, parseInt(String(age)) || 18));\n const cleanGenre = String(genre || \"fantasy\").trim();\n const cleanPrompt = String(prompt || \"\").trim().slice(0, 800);\n const level = Math.min(6, Math.max(1, parseInt(String(imaginationLevel)) || 1));\n \n // Gap count: user override or calculated from level\n let gapCount: number;\n if (requestedGaps !== undefined && requestedGaps !== null) {\n gapCount = Math.min(15, Math.max(0, parseInt(String(requestedGaps)) || 0));\n } else {\n gapCount = Math.round((level * 15) / 100 * (storyLength === \"long\" ? 8 : storyLength === \"short\" ? 2 : 5));\n }\n \n const cleanStoryLength = [\"short\", \"medium\", \"long\"].includes(String(storyLength)) ? String(storyLength) : \"medium\";\n const cleanDetailLevel = [\"detailed\", \"concise\", \"balanced\"].includes(String(detailLevel)) ? String(detailLevel) : \"balanced\";\n const cleanProvider = [\"groq\", \"nvidia\"].includes(String(preferredProvider)) ? String(preferredProvider) : null;\n\n // Build prompts\n const systemPrompt = buildSystemPrompt(cleanAge < 13 ? \"young storyteller\" : userName, cleanAge, cleanGenre, gapCount, cleanStoryLength, cleanDetailLevel);\n const userPrompt = cleanPrompt || `Write me a ${cleanGenre} story!`;\n\n // Loading message\n const loadingMessage = hasPlotTwist(cleanPrompt) \n ? randomMessage(PLOT_TWIST_MESSAGES)\n : randomMessage(LOADING_MESSAGES);\n\n // Pick model based on preference\n let model = pickModel(cleanProvider);\n const startTime = Date.now();\n\n // ─── ATTEMPT 1 ────────────────────────────\n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n \n // Slow apology\n let slowNote = \"\";\n if (latency > 10000) {\n slowNote = randomMessage(SLOW_MESSAGES);\n }\n\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage: loadingMessage,\n slowNote: slowNote || undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n hasPlotTwist: hasPlotTwist(cleanPrompt)\n }, { headers: corsHeaders });\n\n } catch (err) {\n console.warn(`⚠️ Attempt 1 failed (${model.name}): ${err.message}`);\n }\n\n // ─── ATTEMPT 2 (different provider) ───────\n const fallbackProvider = cleanProvider === \"groq\" ? \"nvidia\" : cleanProvider === \"nvidia\" ? \"groq\" : null;\n model = pickModel(fallbackProvider);\n \n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n \n let slowNote = \"\";\n if (latency > 10000) {\n slowNote = randomMessage(SLOW_MESSAGES);\n }\n\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage: loadingMessage,\n slowNote: slowNote || undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n hasPlotTwist: hasPlotTwist(cleanPrompt),\n note: \"Generated with fallback provider\"\n }, { headers: corsHeaders });\n\n } catch (err) {\n console.warn(`⚠️ Attempt 2 failed (${model.name}): ${err.message}`);\n }\n\n // ─── ATTEMPT 3 (any model, desperation) ───\n model = pickModel();\n \n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage: \"Finally got the story dragons to cooperate! 🐉\",\n slowNote: latency > 10000 ? \"Worth the wait—this one's special.\" : undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n note: \"Generated with emergency fallback\"\n }, { headers: corsHeaders });\n\n } catch (err) {\n // All models failed\n return Response.json({\n success: false,\n error: \"All models are taking a nap.\",\n details: err.message,\n story: \"The story dragons are all sleeping right now. Try again in a moment, and maybe bring a snack to wake them up! 🐉✨\",\n gaps: 0\n }, { status: 500, headers: corsHeaders });\n }\n\n } catch (error) {\n return Response.json({\n success: false,\n error: \"Invalid request format\",\n details: error.message\n }, { status: 400, headers: corsHeaders });\n }\n}\n\n// ─── API CALLER ───────────────────────────────\nasync function callModel(modelConfig: any, systemPrompt: string, userPrompt: string) {\n const apiKey = getApiKey(modelConfig.provider);\n \n if (!apiKey) {\n throw new Error(`No API key for ${modelConfig.provider}`);\n }\n\n const body: any = {\n model: modelConfig.model,\n messages: [\n { role: \"system\", content: systemPrompt },\n { role: \"user\", content: userPrompt }\n ],\n temperature: modelConfig.provider === \"nvidia\" ? 0.95 : 1.0,\n max_tokens: 1200\n };\n\n if (modelConfig.provider === \"nvidia\") {\n body.top_p = 0.95;\n }\n\n const response = await fetch(modelConfig.endpoint, {\n method: \"POST\",\n headers: {\n \"Authorization\": `Bearer ${apiKey}`,\n \"Content-Type\": \"application/json\"\n },\n body: JSON.stringify(body)\n });\n\n if (!response.ok) {\n const errorText = await response.text();\n throw new Error(`${response.status}: ${errorText.slice(0, 150)}`);\n }\n\n const data = await response.json();\n const storyText = data.choices?.[0]?.message?.content || \"\";\n\n return {\n story: storyText,\n modelUsed: modelConfig.name,\n provider: modelConfig.provider\n };\n}","/**\n * ╔══════════════════════════════════════════╗\n * ║ LUGEN STORY GENERATOR v4 ║\n * ║ Unique styles • Gap hints • No self-insert ║\n * ╚══════════════════════════════════════════╝\n */\n\n// ─── MODEL POOL ───────────────────────────────\nconst MODEL_POOL = [\n {\n name: \"Llama 4 Scout (Groq)\",\n provider: \"groq\",\n model: \"meta-llama/llama-4-scout-17b-16e-instruct\",\n endpoint: \"https://api.groq.com/openai/v1/chat/completions\",\n speed: \"fastest\",\n },\n {\n name: \"Llama 3.3 70B (Groq)\",\n provider: \"groq\",\n model: \"llama-3.3-70b-versatile\",\n endpoint: \"https://api.groq.com/openai/v1/chat/completions\",\n speed: \"fast\",\n },\n {\n name: \"Llama 3.1 8B (Groq)\",\n provider: \"groq\",\n model: \"llama-3.1-8b-instant\",\n endpoint: \"https://api.groq.com/openai/v1/chat/completions\",\n speed: \"instant\",\n },\n {\n name: \"Llama 4 Maverick (NVIDIA)\",\n provider: \"nvidia\",\n model: \"meta/llama-4-maverick-17b-128e-instruct\",\n endpoint: \"https://integrate.api.nvidia.com/v1/chat/completions\",\n speed: \"medium\",\n },\n {\n name: \"Llama 4 Scout (NVIDIA)\",\n provider: \"nvidia\",\n model: \"meta/llama-4-scout-17b-16e-instruct\",\n endpoint: \"https://integrate.api.nvidia.com/v1/chat/completions\",\n speed: \"medium\",\n },\n {\n name: \"Mistral Medium 3.5 (NVIDIA)\",\n provider: \"nvidia\",\n model: \"mistralai/mistral-medium-3.5-128b\",\n endpoint: \"https://integrate.api.nvidia.com/v1/chat/completions\",\n speed: \"slow\",\n },\n {\n name: \"Llama 3.3 70B (NVIDIA)\",\n provider: \"nvidia\",\n model: \"meta/llama-3.3-70b-instruct\",\n endpoint: \"https://integrate.api.nvidia.com/v1/chat/completions\",\n speed: \"medium\",\n },\n];\n\n// ─── GENRE STYLE ROTATION ─────────────────────\n// Each genre has 5+ unique styles that rotate randomly\nconst GENRE_STYLES: Record = {\n fantasy: [\n \"whimsical fairytale with talking creatures and enchanted forests\",\n \"epic high fantasy with ancient prophecies and fallen kingdoms\",\n \"dark fantasy with cursed lands and morally grey heroes\",\n \"cozy fantasy set in a magical bakery or potion shop\",\n \"mythological fantasy drawing from forgotten legends\",\n \"steampunk fantasy with clockwork magic and airships\",\n ],\n horror: [\n \"psychological horror that makes the reader question reality\",\n \"gothic horror set in a decaying Victorian mansion\",\n \"cosmic horror with unknowable entities beyond human comprehension\",\n \"folk horror rooted in small-town rituals and ancient traditions\",\n \"body horror that transforms the familiar into the grotesque\",\n \"quiet horror where the terror lurks in everyday silences\",\n ],\n scifi: [\n \"space opera with interstellar politics and rogue starships\",\n \"cyberpunk dystopia with neon streets and corporate overlords\",\n \"first contact story from an alien perspective\",\n \"time travel thriller where every choice fractures the timeline\",\n \"solar punk utopia where nature and technology coexist\",\n \"generation ship saga spanning centuries of isolation\",\n ],\n noir: [\n \"hardboiled detective story with a world-weary investigator\",\n \"neon-noir set in a rain-soaked future city\",\n \"period noir in 1940s back alleys and jazz clubs\",\n \"reverse noir told from the criminal's perspective\",\n \"southern gothic noir with crumbling mansions and dark family secrets\",\n \"comedy noir where the detective is completely incompetent\",\n ],\n romance: [\n \"enemies-to-lovers with witty banter and undeniable chemistry\",\n \"second chance romance reuniting former sweethearts years later\",\n \"slow-burn friendship that blossoms into something more\",\n \"adventure romance where danger fuels passion\",\n \"epistolary romance told entirely through letters and messages\",\n \"unexpected romance between two people who weren't looking for love\",\n ],\n comedy: [\n \"absurdist comedy where logic takes a vacation\",\n \"fish-out-of-water story with hilarious misunderstandings\",\n \"satirical take on modern life and technology\",\n \"buddy comedy with two mismatched partners on a wild quest\",\n \"slice-of-life comedy about the world's worst superhero\",\n \"parody of classic story tropes turned upside down\",\n ],\n mystery: [\n \"locked-room puzzle that seems impossible to solve\",\n \"cozy small-town mystery where everyone has a secret\",\n \"thriller mystery with a race against time\",\n \"historical mystery set in an unexpected era\",\n \"supernatural mystery where the detective might be a ghost\",\n \"amateur sleuth mystery solved by an unlikely hero\",\n ],\n adventure: [\n \"treasure hunt spanning continents and ancient ruins\",\n \"survival adventure in an unforgiving wilderness\",\n \"underdog sports adventure with impossible odds\",\n \"sea-faring voyage to uncharted waters\",\n \"underground exploration of a lost civilization\",\n \"heist adventure with a ragtag crew of specialists\",\n ],\n};\n\n// ─── GAP HINT TEMPLATES ────────────────────────\nconst GAP_HINTS = [\n \"Think about: what would surprise the reader here?\",\n \"Consider: something sensory — a sight, sound, or smell.\",\n \"Imagine: an unexpected detail that changes everything.\",\n \"Picture: what's the most interesting thing that could be here?\",\n \"Describe: a color, texture, or feeling that fits this moment.\",\n \"Invent: a word or phrase that's unique to this world.\",\n \"Choose: something that reveals character or hidden motivation.\",\n \"Create: a metaphor or comparison that paints a vivid image.\",\n];\n\n// ─── LOADING MESSAGES ─────────────────────────\nconst LOADING_MESSAGES = [\n \"Weaving a brand new tale...\",\n \"Inventing a story unlike any before...\",\n \"Crafting something totally fresh...\",\n \"Rolling the dice on a new adventure...\",\n \"Brewing a one-of-a-kind narrative...\",\n];\n\nconst SLOW_MESSAGES = [\n \"Still working—too busy making it PERFECTO! ✨\",\n \"Perfection takes time, storyteller... almost there!\",\n \"Good stories can't be rushed! Finishing touches...\",\n \"Quality control in progress. This one's gonna be GOOD.\",\n];\n\n// ─── HELPERS ──────────────────────────────────\nfunction getApiKey(provider: string): string {\n if (provider === \"nvidia\") return process.env.NVIDIA_API_KEY || \"\";\n return process.env.GROQ_API_KEY || \"\";\n}\n\nfunction pickModel(provider?: string | null) {\n let pool = MODEL_POOL;\n if (provider === \"groq\") {\n pool = MODEL_POOL.filter((m) => m.provider === \"groq\");\n }\n if (provider === \"nvidia\") {\n pool = MODEL_POOL.filter((m) => m.provider === \"nvidia\");\n }\n return pool[Math.floor(Math.random() * pool.length)];\n}\n\nfunction randomFrom(arr: T[]): T {\n return arr[Math.floor(Math.random() * arr.length)];\n}\n\nfunction getGenreStyle(genre: string): string {\n const styles = GENRE_STYLES[genre.toLowerCase()] || GENRE_STYLES[\"fantasy\"];\n return randomFrom(styles);\n}\n\nfunction getGapHint(): string {\n return randomFrom(GAP_HINTS);\n}\n\n// ─── PROMPT BUILDER ───────────────────────────\nfunction buildSystemPrompt(\n age: number,\n genre: string,\n gapCount: number,\n storyLength: string,\n detailLevel: string,\n userPrompt: string,\n): string {\n // Age guard\n let contentRules = \"\";\n if (age < 13) {\n contentRules =\n \"STRICT PG. Family-friendly. No violence, romance, scary themes, or mature content. Disney/Pixar level only.\";\n } else if (age < 18) {\n contentRules =\n \"PG-13. Mild adventure and humor. Light romance (crushes only). No explicit content, no profanity, no slurs. YA novel appropriate.\";\n } else {\n contentRules =\n `ADULT USER. Full creative freedom. Mature themes, complex relationships, and dark storylines allowed. No illegal content or hate speech.`;\n }\n\n // Length\n let lengthGuide = \"\";\n if (storyLength === \"short\") lengthGuide = \"Write 150-250 words.\";\n else if (storyLength === \"long\") {\n lengthGuide = \"Write 500-700 words. Be immersive.\";\n } else lengthGuide = \"Write 300-450 words.\";\n\n // Detail\n let detailGuide = \"\";\n if (detailLevel === \"detailed\") {\n detailGuide = \"Rich sensory descriptions. Vivid and cinematic.\";\n } else if (detailLevel === \"concise\") {\n detailGuide = \"Punchy and fast-paced. Short sentences.\";\n } else detailGuide = \"Balanced pacing with moderate description.\";\n\n // Unique style\n const uniqueStyle = getGenreStyle(genre);\n\n // Gap instructions\n let gapGuide = \"\";\n if (gapCount === 0) {\n gapGuide =\n \"Write a COMPLETE story with NO gaps. Do not use [______] at all.\";\n } else if (gapCount <= 3) {\n gapGuide =\n `Leave EXACTLY ${gapCount} gaps as [______]. Each gap should be a SINGLE creative word (noun, verb, or adjective). After each gap, add a subtle hint in parentheses like (Hint: a color) or (Hint: an emotion) to guide the reader.`;\n } else if (gapCount <= 6) {\n gapGuide =\n `Leave EXACTLY ${gapCount} gaps as [______]. Mix of single words and short 2-3 word phrases. After each gap, add a hint in parentheses like (Hint: a mysterious object) or (Hint: a sound you'd hear here). Make the hints specific to the story context.`;\n } else {\n gapGuide =\n `Leave EXACTLY ${gapCount} gaps as [______]. Include some sentence-length gaps (up to 8 words). After EVERY gap, add a detailed hint in parentheses that describes what kind of thing should fill it — be specific about mood, category, or sensory details. Example: (Hint: a dark secret the character has been hiding) or (Hint: the smell of this strange place — earthy? sweet? dangerous?).`;\n }\n\n // Check if user asked for personalization\n const wantsPersonalization =\n /my name|call me|i am named|my age|i am \\d+|i'm \\d+|same age as me|like me/i\n .test(userPrompt);\n\n const personalizationRule = wantsPersonalization\n ? \"The user WANTS to be in the story. Include them as a character matching their request.\"\n : \"DO NOT use the user's name in the story. DO NOT make any character match the user's age unless explicitly asked. Create original characters with their own names, ages, and identities. The story is about THEM, not the reader.\";\n\n return `You are LUGEN, a creative story engine. Generate a COMPLETELY UNIQUE story.\n\nGENRE: ${genre}\nSTYLE: ${uniqueStyle}\n${contentRules}\n${lengthGuide}\n${detailGuide}\n${gapGuide}\n\nCRITICAL RULES:\n- ${personalizationRule}\n- Create ORIGINAL character names. Never use common placeholder names.\n- This story must feel FRESH and DIFFERENT from any standard template.\n- The style \"${uniqueStyle}\" should be obvious in the storytelling.\n- Every gap hint should be GENUINELY helpful and specific to the story context.\n- Do NOT write \"Hint:\" without an actual helpful hint.\n- Match the genre's tone perfectly.`;\n}\n\n// ─── MAIN HANDLER ─────────────────────────────\nexport default async function (req: Request): Promise {\n const corsHeaders = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n };\n\n if (req.method === \"OPTIONS\") {\n return new Response(null, { headers: corsHeaders });\n }\n\n if (req.method !== \"POST\") {\n return Response.json(\n { error: \"POST only, storyteller.\" },\n { status: 405, headers: corsHeaders },\n );\n }\n\n try {\n const body = await req.json();\n const {\n prompt,\n genre,\n age,\n imaginationLevel,\n storyLength = \"medium\",\n detailLevel = \"balanced\",\n gapCount: requestedGaps,\n provider: preferredProvider,\n } = body;\n\n if (!age) {\n return Response.json({ error: \"Age required\" }, {\n status: 400,\n headers: corsHeaders,\n });\n }\n\n const cleanAge = Math.min(120, Math.max(1, parseInt(String(age)) || 18));\n const cleanGenre = String(genre || \"fantasy\").trim();\n const cleanPrompt = String(prompt || \"\").trim().slice(0, 800);\n const level = Math.min(\n 6,\n Math.max(1, parseInt(String(imaginationLevel)) || 1),\n );\n\n // Gap count: user can request ANY number\n let gapCount: number;\n if (requestedGaps !== undefined && requestedGaps !== null) {\n gapCount = Math.max(0, parseInt(String(requestedGaps)) || 0);\n if (gapCount > 50) gapCount = 50; // Absolute max\n } else {\n gapCount = Math.round((level * 15) / 100 * 5);\n }\n\n const cleanStoryLength =\n [\"short\", \"medium\", \"long\"].includes(String(storyLength))\n ? String(storyLength)\n : \"medium\";\n const cleanDetailLevel =\n [\"detailed\", \"concise\", \"balanced\"].includes(String(detailLevel))\n ? String(detailLevel)\n : \"balanced\";\n\n const systemPrompt = buildSystemPrompt(\n cleanAge,\n cleanGenre,\n gapCount,\n cleanStoryLength,\n cleanDetailLevel,\n cleanPrompt,\n );\n const userPrompt = cleanPrompt ||\n `Write me a completely unique ${cleanGenre} story!`;\n\n const loadingMessage = randomFrom(LOADING_MESSAGES);\n let model = pickModel(preferredProvider || null);\n const startTime = Date.now();\n\n // ─── ATTEMPT 1 ────────────────────────────\n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n\n let slowNote = \"\";\n if (latency > 10000) slowNote = randomFrom(SLOW_MESSAGES);\n\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n const hints = extractHints(result.story);\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n hints: hints,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage,\n slowNote: slowNote || undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n }, { headers: corsHeaders });\n } catch (err) {\n console.warn(`⚠️ Attempt 1 failed (${model.name}): ${err.message}`);\n }\n\n // ─── FALLBACKS ─────────────────────────────\n const fallbackProvider = preferredProvider === \"groq\"\n ? \"nvidia\"\n : preferredProvider === \"nvidia\"\n ? \"groq\"\n : null;\n model = pickModel(fallbackProvider);\n\n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n\n let slowNote = \"\";\n if (latency > 10000) slowNote = randomFrom(SLOW_MESSAGES);\n\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n const hints = extractHints(result.story);\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n hints: hints,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage,\n slowNote: slowNote || undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n note: \"Generated with fallback provider\",\n }, { headers: corsHeaders });\n } catch (err) {\n console.warn(`⚠️ Attempt 2 failed (${model.name}): ${err.message}`);\n }\n\n // ─── LAST RESORT ───────────────────────────\n model = pickModel();\n try {\n const result = await callModel(model, systemPrompt, userPrompt);\n const latency = Date.now() - startTime;\n const gapCountActual = (result.story.match(/\\[______\\]/g) || []).length;\n const hints = extractHints(result.story);\n\n return Response.json({\n success: true,\n story: result.story,\n gaps: gapCountActual,\n gapCountRequested: gapCount,\n hints: hints,\n level: level,\n genre: cleanGenre,\n model: result.modelUsed,\n provider: result.provider,\n latency_ms: latency,\n loadingMessage: \"Finally got the story dragons to cooperate! 🐉\",\n slowNote: latency > 10000\n ? \"Worth the wait—this one's special.\"\n : undefined,\n storyLength: cleanStoryLength,\n detailLevel: cleanDetailLevel,\n note: \"Emergency fallback used\",\n }, { headers: corsHeaders });\n } catch (err) {\n return Response.json({\n success: false,\n error: \"All models are taking a nap.\",\n details: err.message,\n story:\n \"The story dragons are all sleeping right now. Try again in a moment! 🐉✨\",\n gaps: 0,\n }, { status: 500, headers: corsHeaders });\n }\n } catch (error) {\n return Response.json({\n success: false,\n error: \"Invalid request format\",\n details: error.message,\n }, { status: 400, headers: corsHeaders });\n }\n}\n\n// ─── API CALLER ───────────────────────────────\nasync function callModel(\n modelConfig: any,\n systemPrompt: string,\n userPrompt: string,\n) {\n const apiKey = getApiKey(modelConfig.provider);\n if (!apiKey) throw new Error(`No API key for ${modelConfig.provider}`);\n\n const body: any = {\n model: modelConfig.model,\n messages: [\n { role: \"system\", content: systemPrompt },\n { role: \"user\", content: userPrompt },\n ],\n temperature: 1.05, // Slightly higher for more variety\n max_tokens: 1200,\n };\n\n if (modelConfig.provider === \"nvidia\") {\n body.top_p = 0.95;\n body.frequency_penalty = 0.3; // Reduce repetition\n body.presence_penalty = 0.3; // Encourage new topics\n }\n\n const response = await fetch(modelConfig.endpoint, {\n method: \"POST\",\n headers: {\n \"Authorization\": `Bearer ${apiKey}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify(body),\n });\n\n if (!response.ok) {\n const errorText = await response.text();\n throw new Error(`${response.status}: ${errorText.slice(0, 150)}`);\n }\n\n const data = await response.json();\n const storyText = data.choices?.[0]?.message?.content || \"\";\n\n return {\n story: storyText,\n modelUsed: modelConfig.name,\n provider: modelConfig.provider,\n };\n}\n\n// ─── HINT EXTRACTOR ───────────────────────────\nfunction extractHints(story: string): string[] {\n const hints: string[] = [];\n const regex = /\$Hint:\\s*([^)]+)\$/gi;\n let match;\n while ((match = regex.exec(story)) !== null) {\n hints.push(match[1].trim());\n }\n return hints;\n}","createdAt",["D",1779465897361],"branchVersion","branchId","d9a8dc8a-52e9-11f1-a184-ee650bb23af1","id","d9a86462-52e9-11f1-a184-ee650bb23af1","lugen-generate-story",["D",1779129975774],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","LUGEN story generator backend. 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Diff · v7