/**
 * Unified entry point for Dirigent services.
 *
 * Routes:
 *   /no-reply/*   → no-reply API (strips /no-reply prefix)
 *   /moderator/*  → moderator bot service (strips /moderator prefix)
 *   otherwise     → 404
 *
 * Env vars:
 *   SERVICES_PORT       (default 8787)
 *   MODERATOR_TOKEN     Discord bot token (required for moderator)
 *   PLUGIN_API_URL      (default http://127.0.0.1:18789)
 *   PLUGIN_API_TOKEN    auth token for plugin API calls
 *   SCHEDULE_IDENTIFIER (default ➡️)
 *   DEBUG_MODE          (default false)
 */

import http from "node:http";
import { createNoReplyHandler } from "./no-reply-api/server.mjs";
import { createModeratorService } from "./moderator/index.mjs";

const PORT = Number(process.env.SERVICES_PORT || 8787);
const MODERATOR_TOKEN = process.env.MODERATOR_TOKEN || "";
const PLUGIN_API_URL = process.env.PLUGIN_API_URL || "http://127.0.0.1:18789";
const PLUGIN_API_TOKEN = process.env.PLUGIN_API_TOKEN || "";
const SCHEDULE_IDENTIFIER = process.env.SCHEDULE_IDENTIFIER || "➡️";
const DEBUG_MODE = process.env.DEBUG_MODE === "true" || process.env.DEBUG_MODE === "1";

function sendJson(res, status, payload) {
  res.writeHead(status, { "Content-Type": "application/json; charset=utf-8" });
  res.end(JSON.stringify(payload));
}

// ── Initialize services ────────────────────────────────────────────────────────

const noReplyHandler = createNoReplyHandler();

let moderatorService = null;
if (MODERATOR_TOKEN) {
  console.log("[dirigent-services] moderator bot enabled");
  moderatorService = createModeratorService({
    token: MODERATOR_TOKEN,
    pluginApiUrl: PLUGIN_API_URL,
    pluginApiToken: PLUGIN_API_TOKEN,
    scheduleIdentifier: SCHEDULE_IDENTIFIER,
    debugMode: DEBUG_MODE,
  });
} else {
  console.log("[dirigent-services] MODERATOR_TOKEN not set — moderator disabled");
}

// ── HTTP server ────────────────────────────────────────────────────────────────

const server = http.createServer((req, res) => {
  const url = req.url ?? "/";

  if (url === "/health") {
    return sendJson(res, 200, {
      ok: true,
      services: {
        noReply: true,
        moderator: !!moderatorService,
      },
    });
  }

  if (url.startsWith("/no-reply")) {
    req.url = url.slice("/no-reply".length) || "/";
    return noReplyHandler(req, res);
  }

  if (url.startsWith("/moderator")) {
    if (!moderatorService) {
      return sendJson(res, 503, { error: "moderator service not configured" });
    }
    req.url = url.slice("/moderator".length) || "/";
    return moderatorService.httpHandler(req, res);
  }

  return sendJson(res, 404, { error: "not_found" });
});

server.listen(PORT, "127.0.0.1", () => {
  console.log(`[dirigent-services] listening on 127.0.0.1:${PORT}`);
  console.log(`[dirigent-services]   /no-reply  → no-reply API`);
  if (moderatorService) {
    console.log(`[dirigent-services]   /moderator → moderator bot`);
    console.log(`[dirigent-services]   plugin API: ${PLUGIN_API_URL}`);
  }
  if (DEBUG_MODE) {
    console.log(`[dirigent-services]   debug mode ON`);
  }
});

// ── Graceful shutdown ──────────────────────────────────────────────────────────

function shutdown(signal) {
  console.log(`[dirigent-services] received ${signal}, shutting down`);
  if (moderatorService) {
    moderatorService.stop();
  }
  server.close(() => {
    console.log("[dirigent-services] server closed");
    process.exit(0);
  });
  // Force-exit after 5s
  setTimeout(() => process.exit(1), 5000).unref();
}

process.on("SIGTERM", () => shutdown("SIGTERM"));
process.on("SIGINT", () => shutdown("SIGINT"));