diff --git a/README.md b/README.md index b63314b..d56be40 100644 --- a/README.md +++ b/README.md @@ -22,3 +22,13 @@ Version 0.224.1 ## Facebook Page Management A simple web interface to manage the Facebook page **"Techno auf den Augen"** is included in the [`facebook-manager`](./facebook-manager) directory. It relies on Express and the built-in Node.js `fetch` API to list and create posts and display basic page insights. Further documentation is available in the [Facebook manager wiki](./facebook-manager/WIKI.md). + +## Lima-City MCP Server + +The [`mcp-server`](./mcp-server) directory contains a dedicated Node.js service that exposes a Model Context Protocol (MCP) bridge for n8n and ChatGPT. It is designed to run on the Lima-City cloud VPS under `https://mcp.die-paten.biz` and provides: + +- A combined `/mcp/tasks` endpoint to orchestrate ChatGPT prompts and n8n workflows. +- Stand-alone `/chatgpt/complete` and `/n8n/execute` endpoints for direct integrations. +- Health checks and configuration via environment variables (see [`mcp-server/.env.example`](./mcp-server/.env.example)). + +Follow the [MCP server README](./mcp-server/README.md) for deployment instructions, reverse proxy examples, and integration tips. diff --git a/mcp-server/.env.example b/mcp-server/.env.example new file mode 100644 index 0000000..d35b41b --- /dev/null +++ b/mcp-server/.env.example @@ -0,0 +1,28 @@ +# Server configuration +PORT=8080 +HOST=0.0.0.0 +JSON_BODY_LIMIT=1mb + +# n8n integration +# Base URL of your n8n instance (e.g. https://automation.example.com) +N8N_API_BASE_URL= +# Optional personal access token for the n8n REST API +N8N_API_KEY= +# Base webhook URL (e.g. https://automation.example.com/webhook) +N8N_WEBHOOK_BASE_URL= +# Optional basic auth credentials when your n8n instance is protected +N8N_BASIC_AUTH_USER= +N8N_BASIC_AUTH_PASSWORD= +# Optional path template for running workflows via API +N8N_RUN_ENDPOINT_TEMPLATE=/rest/workflows/:id/run +# Optional timeout (ms) for n8n HTTP calls +N8N_TIMEOUT= + +# ChatGPT / OpenAI configuration +OPENAI_API_KEY= +# Override the default OpenAI API URL when using compatible services +OPENAI_API_BASE_URL=https://api.openai.com/v1 +OPENAI_DEFAULT_MODEL=gpt-4o-mini +OPENAI_DEFAULT_TEMPERATURE=0.7 +# Optional timeout (ms) for OpenAI HTTP calls +OPENAI_TIMEOUT= diff --git a/mcp-server/README.md b/mcp-server/README.md new file mode 100644 index 0000000..ced8f3c --- /dev/null +++ b/mcp-server/README.md @@ -0,0 +1,183 @@ +# Lima-City MCP Server + +Ein schlanker Node.js-Server, der das **Model Context Protocol (MCP)** für Automatisierungen auf deiner Lima-City Cloud VPS umsetzt. Er fungiert als Brücke zwischen deiner n8n-Instanz und ChatGPT (OpenAI-kompatible APIs) und wurde auf den Betrieb unter der Domain **`https://mcp.die-paten.biz`** ausgelegt. + +## Funktionsumfang + +- 🌐 Einheitliches HTTP-Interface (`/mcp/tasks`) zur Orchestrierung von ChatGPT-Anfragen und n8n-Workflows. +- 🤖 Direkte Weiterleitungen an beliebige n8n-Webhooks oder Workflow-Ausführungen via REST-API. +- 🧠 ChatGPT/ OpenAI-Anbindung inkl. Modell- und Temperatursteuerung. +- 📊 Gesundheitschecks für beide Integrationen über `/health`. +- 🔒 Unterstützung für Basic-Auth geschützte n8n-Instanzen und API-Keys. +- 🪪 Bereit für den Einsatz hinter einem Reverse Proxy (z. B. Nginx) auf Lima-City VPS. + +## Installation + +```bash +cd mcp-server +npm install +cp .env.example .env +``` + +Bearbeite anschließend die `.env` Datei mit deinen Zugangsdaten (siehe [Konfiguration](#konfiguration)). + +### Systemdienst auf Lima-City VPS + +1. **Systemd Service anlegen** (`/etc/systemd/system/mcp-server.service`): + ```ini + [Unit] + Description=Lima-City MCP Server + After=network.target + + [Service] + Type=simple + WorkingDirectory=/var/www/mcp-server + ExecStart=/usr/bin/node src/index.js + Restart=on-failure + Environment=NODE_ENV=production + EnvironmentFile=/var/www/mcp-server/.env + + [Install] + WantedBy=multi-user.target + ``` +2. Projekt nach `/var/www/mcp-server` deployen (z. B. per git pull). +3. `sudo systemctl daemon-reload` +4. `sudo systemctl enable --now mcp-server` + +### Reverse Proxy (Beispiel Nginx) + +```nginx +server { + server_name mcp.die-paten.biz; + + listen 80; + listen [::]:80; + return 301 https://$host$request_uri; +} + +server { + server_name mcp.die-paten.biz; + + listen 443 ssl http2; + listen [::]:443 ssl http2; + ssl_certificate /etc/letsencrypt/live/mcp.die-paten.biz/fullchain.pem; + ssl_certificate_key /etc/letsencrypt/live/mcp.die-paten.biz/privkey.pem; + + location / { + proxy_pass http://127.0.0.1:8080; + proxy_http_version 1.1; + proxy_set_header Upgrade $http_upgrade; + proxy_set_header Connection "upgrade"; + proxy_set_header Host $host; + proxy_set_header X-Real-IP $remote_addr; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_set_header X-Forwarded-Proto $scheme; + } +} +``` + +## Konfiguration + +Alle relevanten Umgebungsvariablen findest du in der Datei [`.env.example`](./.env.example). + +| Variable | Beschreibung | +| --- | --- | +| `PORT` / `HOST` | Port/Host, auf dem der MCP-Server lauscht (Standard: 8080 / 0.0.0.0). | +| `JSON_BODY_LIMIT` | Max. Größe eingehender JSON Payloads (z. B. `1mb`). | +| `N8N_API_BASE_URL` | Basis-URL deiner n8n-Instanz (ohne `/webhook`). | +| `N8N_API_KEY` | Optionaler API-Key für n8n (z. B. Personal Access Token). | +| `N8N_WEBHOOK_BASE_URL` | Basis-URL für Webhook-Aufrufe (z. B. `https://automation.example.com/webhook`). | +| `N8N_BASIC_AUTH_USER` / `N8N_BASIC_AUTH_PASSWORD` | Optional: Basic Auth Zugangsdaten, wenn n8n geschützt ist. | +| `N8N_RUN_ENDPOINT_TEMPLATE` | Pfad-Template zum Ausführen eines Workflows via API (`/rest/workflows/:id/run`). | +| `OPENAI_API_KEY` | API-Key für ChatGPT/OpenAI-kompatible Anbieter. | +| `OPENAI_API_BASE_URL` | Alternative API-URL, falls du einen kompatiblen Anbieter nutzt. | +| `OPENAI_DEFAULT_MODEL` | Standardmodell (z. B. `gpt-4o-mini`). | +| `OPENAI_DEFAULT_TEMPERATURE` | Optionale Standardtemperatur (Float). | + +> **Hinweis:** Für Lima-City Firewalls Ports öffnen (`iptables`/`ufw`) und sicherstellen, dass `8080/tcp` intern erreichbar ist. Der externe Zugriff erfolgt ausschließlich über den Reverse Proxy. + +## Endpunkte + +### `GET /` +Liefert eine kurze Statusmeldung des Servers. + +### `GET /health` +Gibt die aktuellen Gesundheitsinformationen der n8n- und ChatGPT-Anbindungen zurück. + +### `POST /chatgpt/complete` +Erzeugt eine ChatGPT-Antwort. Beispielpayload: + +```json +{ + "prompt": "Erstelle eine Zusammenfassung der letzten Supportanfrage.", + "context": [ + { "role": "system", "content": "Du bist ein Support-Agent." }, + { "role": "user", "content": "Kunde meldet Fehler 42 bei der Registrierung." } + ], + "model": "gpt-4o-mini", + "temperature": 0.2 +} +``` + +### `POST /n8n/execute` +Löst einen Workflow aus. Beispiel (Webhook): + +```json +{ + "webhookSlug": "support-intake", + "payload": { + "ticketId": "4711", + "message": "Der Kunde benötigt Hilfe." } +} +``` + +### `POST /mcp/tasks` +Kombinierter Endpunkt, um ChatGPT und n8n hintereinander aufzurufen. + +```json +{ + "prompt": "Fasse das Meeting in Stichpunkten zusammen.", + "context": [ + "Meetingnotizen vom 12.05." + ], + "chat": { + "model": "gpt-4o-mini" + }, + "workflow": { + "webhookSlug": "send-meeting-summary", + "payload": { + "recipient": "team@die-paten.biz" + } + } +} +``` + +Der MCP-Server ergänzt automatisch das ChatGPT-Ergebnis und leitet es (sofern `mergeResults` nicht auf `false` gesetzt ist) an n8n weiter. + +## Nutzung mit ChatGPT / OpenAI + +- Richte in ChatGPT (Custom GPT oder API) einen **Webhook** auf `https://mcp.die-paten.biz/mcp/tasks` ein. +- Übermittle in der Payload den gewünschten Prompt sowie optional ein Ziel in n8n. +- Die Antwort enthält sowohl die ChatGPT-Ausgabe als auch die Antwort deines n8n-Workflows. + +## Nutzung mit n8n + +- Verwende den HTTP Request Node, um ChatGPT über `/chatgpt/complete` aufzurufen. +- Nutze Webhook-Trigger in n8n, um `/mcp/tasks` als zentrale Schnittstelle anzusprechen. +- Der Endpunkt ist ideal, um nachgelagerte Automationen in n8n zu starten und gleichzeitig ChatGPT in die Verarbeitung einzubeziehen. + +## Entwicklung + +```bash +npm run dev +``` + +Standardmäßig wird auf `http://localhost:8080` gelauscht. Mit `LOG_LEVEL=debug` erhältst du detaillierte Logs. + +## Fehlerbehebung + +- Prüfe `/health`, falls Antworten ausbleiben. +- Aktiviere `LOG_LEVEL=debug`, um Anfrage- und Antwortdaten zu prüfen (sensitiven Inhalt zuvor maskieren!). +- Bei n8n-Workflows ohne API-Key sollte `N8N_WEBHOOK_BASE_URL` gesetzt sein – andernfalls verwende einen vollständigen `webhookUrl` im Request. + +Viel Erfolg beim Betrieb auf **mcp.die-paten.biz**! ✨ diff --git a/mcp-server/package-lock.json b/mcp-server/package-lock.json new file mode 100644 index 0000000..092af8b --- /dev/null +++ b/mcp-server/package-lock.json @@ -0,0 +1,1356 @@ +{ + "name": "mcp-server", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "mcp-server", + "version": "1.0.0", + "license": "MIT", + "dependencies": { + "axios": "^1.6.8", + "cors": "^2.8.5", + "dotenv": "^16.4.5", + "express": "^4.19.2" + }, + "devDependencies": { + "nodemon": "^3.1.0" + } + }, + "node_modules/accepts": { + 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a/mcp-server/src/index.js b/mcp-server/src/index.js new file mode 100644 index 0000000..b7e9e8e --- /dev/null +++ b/mcp-server/src/index.js @@ -0,0 +1,207 @@ +const express = require("express"); +const cors = require("cors"); +const dotenv = require("dotenv"); +const { createN8NClient } = require("./n8nClient"); +const { createOpenAIClient } = require("./openaiClient"); +const logger = require("./logger"); + +const { version } = require("../package.json"); + +dotenv.config(); + +const app = express(); +const port = parseInt(process.env.PORT || "8080", 10); +const host = process.env.HOST || "0.0.0.0"; +const jsonBodyLimit = process.env.JSON_BODY_LIMIT || "1mb"; + +app.use(cors()); +app.use(express.json({ limit: jsonBodyLimit })); +app.use(express.urlencoded({ extended: true })); + +const n8nClient = createN8NClient({ + apiBaseUrl: process.env.N8N_API_BASE_URL, + webhookBaseUrl: process.env.N8N_WEBHOOK_BASE_URL, + apiKey: process.env.N8N_API_KEY, + basicAuthUser: process.env.N8N_BASIC_AUTH_USER, + basicAuthPassword: process.env.N8N_BASIC_AUTH_PASSWORD, + runEndpointTemplate: + process.env.N8N_RUN_ENDPOINT_TEMPLATE || "/rest/workflows/:id/run", + timeout: process.env.N8N_TIMEOUT + ? parseInt(process.env.N8N_TIMEOUT, 10) + : undefined, +}); + +const openAiClient = createOpenAIClient({ + apiKey: process.env.OPENAI_API_KEY, + baseURL: process.env.OPENAI_API_BASE_URL, + defaultModel: process.env.OPENAI_DEFAULT_MODEL, + defaultTemperature: process.env.OPENAI_DEFAULT_TEMPERATURE + ? Number(process.env.OPENAI_DEFAULT_TEMPERATURE) + : undefined, + timeout: process.env.OPENAI_TIMEOUT + ? parseInt(process.env.OPENAI_TIMEOUT, 10) + : undefined, +}); + +app.get("/", (req, res) => { + res.json({ + name: "Lima-City MCP Server", + status: "ok", + version, + timestamp: new Date().toISOString(), + }); +}); + +app.get("/health", async (req, res) => { + const services = { + n8n: n8nClient.isConfigured() + ? await n8nClient.healthCheck() + : { available: false, reason: "n8n integration not configured" }, + chatgpt: openAiClient.describe(), + }; + + res.json({ + status: "ok", + version, + services, + timestamp: new Date().toISOString(), + }); +}); + +app.post("/chatgpt/complete", async (req, res, next) => { + try { + const result = await openAiClient.createChatCompletion(req.body || {}); + res.json({ status: "ok", result }); + } catch (error) { + next(error); + } +}); + +app.post("/n8n/execute", async (req, res, next) => { + try { + if (!n8nClient.isConfigured()) { + const err = new Error("n8n integration is not configured"); + err.status = 400; + throw err; + } + + const result = await n8nClient.triggerWorkflow(req.body || {}); + res.json({ status: "ok", result }); + } catch (error) { + next(error); + } +}); + +app.post("/mcp/tasks", async (req, res, next) => { + try { + const payload = req.body || {}; + const { prompt, context, workflow = {}, chat = {}, metadata = {} } = payload; + + const response = { + metadata, + }; + + const shouldCallChatGPT = Boolean( + prompt || + (Array.isArray(context) && context.length > 0) || + (Array.isArray(chat.messages) && chat.messages.length > 0) + ); + + if (shouldCallChatGPT) { + const chatOptions = { + prompt, + context, + ...chat, + }; + + response.chatgpt = await openAiClient.createChatCompletion(chatOptions); + } + + const workflowConfig = { + webhookUrl: workflow.webhookUrl, + webhookSlug: workflow.webhookSlug, + workflowId: workflow.workflowId, + method: workflow.method, + query: workflow.query, + }; + + const shouldTriggerWorkflow = Boolean( + workflowConfig.webhookUrl || + workflowConfig.webhookSlug || + workflowConfig.workflowId + ); + + if (shouldTriggerWorkflow) { + if (!n8nClient.isConfigured()) { + const err = new Error("n8n integration is not configured"); + err.status = 400; + throw err; + } + + let workflowPayload = workflow.payload; + + if (!workflowPayload && payload.mergeResults !== false) { + workflowPayload = { + prompt, + context, + chatgpt: response.chatgpt, + metadata, + }; + } + + response.n8n = await n8nClient.triggerWorkflow({ + ...workflowConfig, + payload: workflowPayload, + }); + } + + res.json({ status: "completed", results: response }); + } catch (error) { + next(error); + } +}); + +app.use((req, res) => { + res.status(404).json({ + status: "not_found", + message: "Endpoint not found", + }); +}); + +app.use((err, req, res, next) => { + logger.error("Request failed", { + path: req.path, + method: req.method, + status: err.status || 500, + details: err.details || err.message, + }); + + res.status(err.status || 500).json({ + status: "error", + message: err.message, + details: err.details || undefined, + }); +}); + +app.listen(port, host, () => { + logger.info("MCP server is running", { + host, + port, + }); +}); + +process.on("unhandledRejection", (reason) => { + logger.error("Unhandled promise rejection", { + reason: reason instanceof Error ? reason.message : reason, + }); +}); + +process.on("SIGTERM", () => { + logger.info("Received SIGTERM, shutting down gracefully"); + process.exit(0); +}); + +process.on("SIGINT", () => { + logger.info("Received SIGINT, shutting down gracefully"); + process.exit(0); +}); diff --git a/mcp-server/src/logger.js b/mcp-server/src/logger.js new file mode 100644 index 0000000..310152b --- /dev/null +++ b/mcp-server/src/logger.js @@ -0,0 +1,53 @@ +const levels = ["debug", "info", "warn", "error"]; +const levelPriority = levels.reduce((acc, name, index) => { + acc[name] = index; + return acc; +}, {}); + +const envLevel = process.env.LOG_LEVEL ? process.env.LOG_LEVEL.toLowerCase() : "info"; +const currentLevel = levels.includes(envLevel) ? envLevel : "info"; + +function shouldLog(level) { + return levelPriority[level] >= levelPriority[currentLevel]; +} + +function formatMessage(level, message, meta) { + const base = { + level, + message, + timestamp: new Date().toISOString(), + }; + + if (meta && Object.keys(meta).length > 0) { + base.meta = meta; + } + + return base; +} + +function emit(level, message, meta = undefined) { + if (!levelPriority[level]) { + level = "info"; + } + if (!shouldLog(level)) { + return; + } + + const payload = formatMessage(level, message, meta); + const serialized = JSON.stringify(payload); + + if (level === "error") { + console.error(serialized); + } else if (level === "warn") { + console.warn(serialized); + } else { + console.log(serialized); + } +} + +module.exports = { + debug: (message, meta) => emit("debug", message, meta), + info: (message, meta) => emit("info", message, meta), + warn: (message, meta) => emit("warn", message, meta), + error: (message, meta) => emit("error", message, meta), +}; diff --git a/mcp-server/src/n8nClient.js b/mcp-server/src/n8nClient.js new file mode 100644 index 0000000..357f6f5 --- /dev/null +++ b/mcp-server/src/n8nClient.js @@ -0,0 +1,207 @@ +const axios = require("axios"); +const logger = require("./logger"); + +function normalizeBaseUrl(url) { + if (!url) { + return null; + } + return url.replace(/\/$/, ""); +} + +function isAbsoluteUrl(value) { + return typeof value === "string" && /^https?:\/\//i.test(value); +} + +class N8NClient { + constructor(options = {}) { + this.apiBaseUrl = normalizeBaseUrl(options.apiBaseUrl); + this.webhookBaseUrl = normalizeBaseUrl(options.webhookBaseUrl); + this.apiKey = options.apiKey; + this.basicAuth = + options.basicAuthUser && options.basicAuthPassword + ? { + username: options.basicAuthUser, + password: options.basicAuthPassword, + } + : null; + this.timeout = options.timeout || 30000; + this.runEndpointTemplate = + options.runEndpointTemplate || "/rest/workflows/:id/run"; + + this.apiHttp = this.apiBaseUrl + ? axios.create({ + baseURL: this.apiBaseUrl, + timeout: this.timeout, + headers: this.apiKey + ? { + "X-N8N-API-KEY": this.apiKey, + } + : undefined, + auth: this.basicAuth || undefined, + }) + : null; + } + + isConfigured() { + return Boolean(this.apiBaseUrl || this.webhookBaseUrl); + } + + buildWebhookUrl(identifier) { + if (!identifier) { + return null; + } + + if (isAbsoluteUrl(identifier)) { + return identifier; + } + + if (!this.webhookBaseUrl) { + return null; + } + + const cleanedIdentifier = identifier.replace(/^\/+/, ""); + return `${this.webhookBaseUrl}/${cleanedIdentifier}`; + } + + buildRunEndpoint(workflowId) { + if (!workflowId) { + return null; + } + + return this.runEndpointTemplate.replace(":id", workflowId); + } + + async healthCheck() { + if (!this.apiHttp) { + return { + available: false, + reason: "n8n API base URL not configured", + }; + } + + const candidates = ["/healthz", "/rest/healthz", "/rest/v1/healthz"]; + + for (const endpoint of candidates) { + try { + const response = await this.apiHttp.get(endpoint); + return { + available: response.status === 200, + statusCode: response.status, + endpoint, + data: response.data, + }; + } catch (error) { + logger.debug("n8n health endpoint failed", { + endpoint, + status: error.response?.status, + }); + } + } + + return { + available: false, + statusCode: null, + reason: "Unable to reach n8n health endpoint", + }; + } + + async triggerWorkflow(options = {}) { + const method = (options.method || "POST").toUpperCase(); + const payload = options.payload ?? {}; + const query = options.query ?? {}; + + let targetUrl = options.webhookUrl || null; + let viaApi = false; + + if (!targetUrl && (options.webhookSlug || options.workflowId)) { + targetUrl = this.buildWebhookUrl(options.webhookSlug || options.workflowId); + } + + if (!targetUrl && options.workflowId) { + const endpoint = this.buildRunEndpoint(options.workflowId); + if (!this.apiHttp || !endpoint) { + throw new Error( + "n8n API client is not configured to run workflows by ID" + ); + } + targetUrl = endpoint; + viaApi = true; + } + + if (!targetUrl) { + throw new Error( + "Unable to determine n8n endpoint. Provide webhookUrl, webhookSlug, or workflowId." + ); + } + + logger.info("Triggering n8n workflow", { + targetUrl, + viaApi, + method, + }); + + try { + if (viaApi) { + const response = await this.apiHttp.post(targetUrl, { + payload, + query, + }); + + return { + status: response.status, + data: response.data, + viaApi, + targetUrl: `${this.apiBaseUrl}${targetUrl}`, + }; + } + + const config = { + url: targetUrl, + method, + data: payload, + params: query, + timeout: this.timeout, + }; + + if (!isAbsoluteUrl(targetUrl) && this.webhookBaseUrl) { + config.baseURL = this.webhookBaseUrl; + config.url = targetUrl.replace(this.webhookBaseUrl, ""); + } + + if (this.basicAuth) { + config.auth = this.basicAuth; + } + + const response = await axios(config); + + return { + status: response.status, + data: response.data, + viaApi, + targetUrl: response.config.url.startsWith("http") + ? response.config.url + : `${response.config.baseURL}${response.config.url}`, + }; + } catch (error) { + logger.error("Failed to trigger n8n workflow", { + targetUrl, + viaApi, + status: error.response?.status, + }); + + const err = new Error("Failed to trigger n8n workflow"); + err.status = error.response?.status || 500; + err.details = error.response?.data || { message: error.message }; + err.targetUrl = targetUrl; + throw err; + } + } +} + +function createN8NClient(options) { + return new N8NClient(options); +} + +module.exports = { + createN8NClient, +}; diff --git a/mcp-server/src/openaiClient.js b/mcp-server/src/openaiClient.js new file mode 100644 index 0000000..bedcc60 --- /dev/null +++ b/mcp-server/src/openaiClient.js @@ -0,0 +1,145 @@ +const axios = require("axios"); +const logger = require("./logger"); + +function normalizeMessages(context = []) { + if (!Array.isArray(context)) { + return []; + } + + return context + .map((entry) => { + if (!entry) { + return undefined; + } + + if (typeof entry === "string") { + return { role: "user", content: entry }; + } + + const role = entry.role || entry.type; + const content = entry.content ?? entry.message; + + if (!role || !content) { + return undefined; + } + + return { role, content }; + }) + .filter(Boolean); +} + +class OpenAIClient { + constructor(options = {}) { + this.apiKey = options.apiKey; + this.baseURL = options.baseURL || "https://api.openai.com/v1"; + this.defaultModel = options.defaultModel || "gpt-4o-mini"; + this.defaultTemperature = + typeof options.defaultTemperature === "number" + ? options.defaultTemperature + : 0.7; + + this.http = axios.create({ + baseURL: this.baseURL, + timeout: options.timeout || 30000, + }); + } + + isConfigured() { + return Boolean(this.apiKey); + } + + describe() { + return { + configured: this.isConfigured(), + baseURL: this.baseURL, + defaultModel: this.defaultModel, + }; + } + + async createChatCompletion(options = {}) { + if (!this.isConfigured()) { + throw new Error("OpenAI API key is not configured"); + } + + const messages = normalizeMessages(options.messages || options.context); + + if (options.system) { + messages.unshift({ role: "system", content: options.system }); + } + + if (options.prompt) { + messages.push({ role: "user", content: options.prompt }); + } + + if (messages.length === 0) { + throw new Error("No messages or prompt provided for ChatGPT completion"); + } + + const payload = { + model: options.model || this.defaultModel, + messages, + temperature: + typeof options.temperature === "number" + ? options.temperature + : this.defaultTemperature, + }; + + if (options.maxTokens) { + payload.max_tokens = options.maxTokens; + } + + if (options.frequencyPenalty !== undefined) { + payload.frequency_penalty = options.frequencyPenalty; + } + + if (options.presencePenalty !== undefined) { + payload.presence_penalty = options.presencePenalty; + } + + if (options.stop) { + payload.stop = options.stop; + } + + logger.debug("Sending prompt to OpenAI", { + model: payload.model, + messageCount: payload.messages.length, + }); + + try { + const response = await this.http.post("/chat/completions", payload, { + headers: { + Authorization: `Bearer ${this.apiKey}`, + }, + }); + + const choice = response.data.choices?.[0]; + + return { + id: response.data.id, + model: response.data.model, + created: response.data.created, + message: choice?.message || null, + finishReason: choice?.finish_reason || null, + usage: response.data.usage || null, + raw: response.data, + }; + } catch (error) { + logger.error("OpenAI request failed", { + error: error.response?.data || error.message, + }); + + const err = new Error("Failed to complete ChatGPT request"); + err.status = error.response?.status || 500; + err.details = error.response?.data || { message: error.message }; + throw err; + } + } +} + +function createOpenAIClient(options) { + return new OpenAIClient(options); +} + +module.exports = { + createOpenAIClient, +};