import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
import express from "express";
import { createServer } from "./createServer.js";

console.log('este no tiene variables de entorno, es un servidor MCP Planilla');


async function main() {
  const useStdio = process.argv.includes("--stdio");
  if (useStdio) {
    // bootLog("Modo transporte: stdio");
    const server    = createServer();
    const transport = new StdioServerTransport();
    await server.connect(transport);
    console.log("MCP Planilla server listo (stdio)");
  } else {
    // bootLog("Modo transporte: HTTP streamable");
    const app  = express();
    app.use(express.json());

    app.use((req, _res, next) => {
      console.log(`[HTTP] ${req.method} ${req.originalUrl} ${req.statusCode} ${req.res.body}`);
      next();
    });

    const port = process.env.PORT || 5000;

    app.post("/mcp", async (req, res) => {
      try {
        const server    = createServer();
        const transport = new StreamableHTTPServerTransport({ sessionIdGenerator: undefined });
        res.on("close", () => {
          transport.close();
          server.close();
        });
        await server.connect(transport);
        await transport.handleRequest(req, res, req.body);
      } catch (error) {
        console.error("Error handling MCP request:", error);
        if (!res.headersSent) {
          res.status(500).json({
            jsonrpc: "2.0",
            error:  { code: -32603, message: "Internal server error" },
            id:     null,
          });
        }
      }
    });

    ["get", "delete"].forEach((m) =>
      app[m]("/mcp", (_req, res) =>
        res.status(405).json({
          jsonrpc: "2.0",
          error:  { code: -32000, message: "Method not allowed." },
          id:     null,
        })
      )
    );

    app.listen(port, () => {
      console.log(`MCP Planilla HTTP server listening on port ${port}`);
    });
  }
}

main().catch((err) => {
  console.error("Error fatal en MCP server:", err);
  process.exit(1);
});