import type { RuntimeMode } from "../shared/api";
import type { ServerConfig } from "./config";
import type { StaticAssets } from "./static";

import { createApiError, jsonResponse } from "./helpers";
import { handleHealth } from "./routes/health";
import { serveStaticAsset } from "./static";

export interface StartServerOptions {
  config: ServerConfig;
  mode: RuntimeMode;
  staticAssets?: StaticAssets;
}

export function startServer(options: StartServerOptions) {
  const { config, mode, staticAssets } = options;

  const server = Bun.serve({
    fetch(req) {
      if (staticAssets) {
        return serveStaticAsset(new URL(req.url).pathname, staticAssets);
      }
      return new Response("Frontend is served by Vite dev server on :5173", { status: 404 });
    },
    hostname: config.host,
    port: config.port,
    routes: {
      "/api/*": () => jsonResponse(createApiError("API route not found", 404), { mode, status: 404 }),
      "/health": {
        GET: () => handleHealth(mode),
      },
    },
  });

  console.log(`{{app-name}} listening on ${server.url}`);

  return server;
}