import { serve } from "@hono/node-server";
import { OpenAPIHono } from "@hono/zod-openapi";
import { swaggerUI } from "@hono/swagger-ui";
import { config } from "./config";
import { logger } from "@repo/logger";

const app = new OpenAPIHono();

// OpenAPI documentation
app.doc("/doc", {
  openapi: "3.0.0",
  info: {
    version: "1.0.0",
    title: "API Documentation",
    description: "API built with Hono and Zod OpenAPI",
  },
});

// Swagger UI
app.get("/ui", swaggerUI({ url: "/doc" }));

// Health check
app.get("/health", (c) => {
  return c.json({ status: "ok", timestamp: new Date().toISOString() });
});

const port = parseInt(config.PORT);

logger.info(`Starting API server on port ${port}`);
logger.info(`Swagger UI available at http://localhost:${port}/ui`);

const server = serve({
  fetch: app.fetch,
  port,
});

const tearDown = () => {
  logger.info("Server shutting down...");
  if (server) {
    server.close(() => {
      logger.info("Server closed");
      process.exit(0);
    });
  } else {
    process.exit(0);
  }
};

process.on("SIGINT", tearDown);
process.on("SIGTERM", tearDown);
process.on("SIGUSR1", tearDown);
process.on("SIGUSR2", tearDown);