#!/usr/bin/env node
import { fileURLToPath } from "url";
import { dirname, join } from "path";
import { readFileSync } from "fs";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import type { OctopusConfig } from "./types.js";
import { createServer } from "./server.js";
// Load .env from the project root directory (silently)
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const projectRoot = join(__dirname, "..");
const envPath = join(projectRoot, ".env");
// Read and parse .env file manually to avoid dotenv's verbose output
try {
const envFile = readFileSync(envPath, "utf-8");
const envVars = envFile.split("\n").filter(line => line.trim() && !line.startsWith("#"));
envVars.forEach(line => {
const [key, ...valueParts] = line.split("=");
const value = valueParts.join("=").trim();
if (key && !process.env[key]) {
process.env[key] = value;
}
});
} catch (error) {
// .env file doesn't exist or can't be read - this is okay
}
// Build config from environment
const config: OctopusConfig = {
apiKey: process.env.OCTOPUS_API_KEY || "",
electricityMpan: process.env.ELECTRICITY_MPAN,
electricitySerialNumber: process.env.ELECTRICITY_SERIAL_NUMBER,
gasMprn: process.env.GAS_MPRN,
gasSerialNumber: process.env.GAS_SERIAL_NUMBER,
};
// Fail fast if API key is missing — don't wait for first tool call to discover this
if (!config.apiKey) {
console.error("Error: OCTOPUS_API_KEY is not set.");
console.error("Set it in your .env file or as an environment variable.");
process.exit(1);
}
// Create and start the MCP server
const server = createServer(config);
async function run(): Promise<void> {
const transport = new StdioServerTransport();
await server.connect(transport);
// Log configuration status after connection (to stderr, won't interfere with MCP protocol)
console.error("Octopus Energy MCP Server running on stdio");
console.error("Configuration:");
console.error(` API Key: ${config.apiKey ? "✓ Set" : "✗ Not set"}`);
console.error(` Electricity MPAN: ${config.electricityMpan ? "✓ Set" : "○ Not set"}`);
console.error(` Electricity Serial: ${config.electricitySerialNumber ? "✓ Set" : "○ Not set"}`);
console.error(` Gas MPRN: ${config.gasMprn ? "✓ Set" : "○ Not set"}`);
console.error(` Gas Serial: ${config.gasSerialNumber ? "✓ Set" : "○ Not set"}`);
}
run().catch((error) => {
console.error("Fatal error:", error);
process.exit(1);
});
