import config, { getEnvironment } from "./config.js";
import log4js from "log4js";
import express from "express";
import cors from "cors";
import path from "path";
import { fileURLToPath } from "url";
import { createServer } from "http";
import session from "express-session";
import MongoStore from "connect-mongo";
import { Server } from "socket.io";
import { connectMongo } from "./db/connect.js";
import { syncPatchesFromConfig } from "./services/patches.js";
import { recalculateAllPatchesGrowingState } from "./services/patchGrowingState.js";
import { syncDeviceFromConfig } from "./services/devices.js";
import { SocketManager } from "./socket/SocketManager.js";
import { MqttTtnIngest } from "./mqtt/MqttTtnIngest.js";
import { getWateringSessionsState } from "./services/allotmentState.js";
import { listWaterSchedulesForConfiguredDevice } from "./services/waterSchedules.js";
import { SubscriptionRegistry } from "./socket/SubscriptionRegistry.js";
import { registerAllotmentSocketApi } from "./socket/allotmentSocketApi.js";
import { startHistorySampler } from "./services/history.js";
import { createOidcClient, createOidcRouter } from "./auth/oidc.js";
import { createImagesRouter } from "./routes/images.js";
import { getLogger, getLogLevel } from "./logger.js";

const logger = getLogger("App");

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const isProd = getEnvironment() === "production";
const clientUrl = config.app.urlClient;
const mongoUri = config.database.mongo.url;

await connectMongo(mongoUri);

await syncDeviceFromConfig(config);
await syncPatchesFromConfig(config);

const PATCH_GROWING_RECALC_MS = 10 * 1000;
try {
  await recalculateAllPatchesGrowingState();
} catch (e) {
  logger.error("Initial patch growing state recalc failed:", e);
}

try {
  await createOidcClient();
} catch (e) {
  logger.error("OIDC discovery/init failed:", e.message);
}

const app = express();
app.set("trust proxy", 1);

app.use(log4js.connectLogger(logger, { level: "trace" }));

app.use(
  cors({
    origin: clientUrl,
    credentials: true,
  }),
);

const sessionMiddleware = session({
  name: "ta.sid",
  secret: config.auth.sessionSecret,
  resave: false,
  saveUninitialized: false,
  store: MongoStore.create({
    mongoUrl: mongoUri,
    ttl: 14 * 24 * 60 * 60,
  }),
  cookie: {
    httpOnly: true,
    secure: isProd,
    sameSite: isProd ? "none" : "lax",
    maxAge: 14 * 24 * 60 * 60 * 1000,
  },
});

app.use(sessionMiddleware);
app.use(express.json());

app.use(createOidcRouter(clientUrl));

app.use("/api/images", createImagesRouter());

app.get("/api/me", (req, res) => {
  if (req.session?.user) {
    res.json({ status: "ok", user: req.session.user });
  } else {
    res.status(401).json({ status: "error", error: "Not authenticated" });
  }
});

const server = createServer(app);
const io = new Server(server, {
  cors: {
    origin: clientUrl,
    methods: ["GET", "POST"],
    credentials: true,
  },
});

io.engine.use((req, res, next) => {
  sessionMiddleware(req, res, next);
});

const subscriptionRegistry = new SubscriptionRegistry();
const socketManager = new SocketManager(io, { subscriptionRegistry });

async function notifyWateringSubscribers() {
  const data = await getWateringSessionsState();
  socketManager.emitWateringSessionsUpdated(data);
}

async function notifyWaterSchedulesSubscribers() {
  const data = await listWaterSchedulesForConfiguredDevice();
  socketManager.emitWaterSchedulesUpdated(data);
}

socketManager.registerSocketApi = (socket, client) => {
  registerAllotmentSocketApi(socket, {
    socketClient: client,
    subscriptionRegistry,
    notifyWateringSubscribers,
    notifyWaterSchedulesSubscribers,
    emitPatchUpdated: (patch) => socketManager.emitPatchUpdated(patch),
  });
};

const mqttIngest = new MqttTtnIngest(socketManager);
mqttIngest.start();

startHistorySampler();

setInterval(async () => {
  try {
    const changed = await recalculateAllPatchesGrowingState();
    for (const patch of changed) {
      socketManager.emitPatchUpdated(patch);
    }
  } catch (e) {
    logger.error("Periodic patch growing state recalc failed:", e);
  }
}, PATCH_GROWING_RECALC_MS);

if (isProd) {
  const staticPath = path.join(__dirname, "../client/dist");
  app.use(express.static(staticPath));
  app.get("*", (req, res, next) => {
    if (req.path.startsWith("/api") || req.path.startsWith("/auth")) {
      return next();
    }
    res.sendFile(path.join(staticPath, "index.html"));
  });
}

const PORT = config.server.port;
server.listen(PORT, () => {
  logger.info(
    `Tom's Allotment server http://localhost:${PORT} (env=${getEnvironment()}, logLevel=${getLogLevel()})`,
  );
});