import "dotenv/config";
import express from "express";
import { createServer } from "http";
import net from "net";
import { createExpressMiddleware } from "@trpc/server/adapters/express";
import * as cron from "node-cron";
import { registerOAuthRoutes } from "./oauth";
import { appRouter } from "../routers";
import { createContext } from "./context";
import { serveStatic, setupVite } from "./vite";
import { runFullImport } from "../importer";
import uploadRoutes from "../uploadRoutes";
import scheduledRoutes from "../scheduledRoutes";
import { ensureAdminExists } from "../localAuth";
import { getSetting } from "../db";

function isPortAvailable(port: number): Promise<boolean> {
  return new Promise(resolve => {
    const server = net.createServer();
    server.listen(port, () => { server.close(() => resolve(true)); });
    server.on("error", () => resolve(false));
  });
}

async function findAvailablePort(startPort: number = 3000): Promise<number> {
  for (let port = startPort; port < startPort + 20; port++) {
    if (await isPortAvailable(port)) return port;
  }
  throw new Error(`No available port found starting from ${startPort}`);
}

// ─── Tâche d'import quotidien ─────────────────────────────────────────────────

let cronJob: ReturnType<typeof cron.schedule> | null = null;

async function scheduleDailyImport() {
  // Heure configurable, défaut 06:00
  const importTime = (await getSetting("import_time")) || "06:00";
  const [hour, minute] = importTime.split(":").map(Number);
  const cronExpr = `0 ${minute ?? 0} ${hour ?? 6} * * *`;

  if (cronJob) {
    cronJob.stop();
    cronJob = null;
  }

  cronJob = cron.schedule(cronExpr, async () => {
    console.log(`[Cron] Import automatique démarré à ${new Date().toISOString()}`);
    try {
      const result = await runFullImport();
      console.log(`[Cron] Import terminé — Veille: +${result.veille.newRows} | AAP: +${result.aap.newRows}`);
    } catch (e) {
      console.error("[Cron] Erreur lors de l'import:", e);
    }
  });

  console.log(`[Cron] Import quotidien planifié à ${importTime} (${cronExpr})`);
}

async function startServer() {
  const app = express();
  const server = createServer(app);

  app.use(express.json({ limit: "50mb" }));
  app.use(express.urlencoded({ limit: "50mb", extended: true }));

  registerOAuthRoutes(app);
  app.use(uploadRoutes);
  app.use(scheduledRoutes);

  app.use(
    "/api/trpc",
    createExpressMiddleware({ router: appRouter, createContext })
  );

  if (process.env.NODE_ENV === "development") {
    await setupVite(app, server);
  } else {
    serveStatic(app);
  }

  const preferredPort = parseInt(process.env.PORT || "3000");
  const port = await findAvailablePort(preferredPort);

  if (port !== preferredPort) {
    console.log(`Port ${preferredPort} is busy, using port ${port} instead`);
  }

  server.listen(port, async () => {
    console.log(`Server running on http://localhost:${port}/`);

    // Initialisation post-démarrage
    try {
      await ensureAdminExists();
      await scheduleDailyImport();
    } catch (e) {
      console.error("[Init] Erreur d'initialisation:", e);
    }
  });
}

startServer().catch(console.error);