// OwlBoard - © Fred Boniface 2022-2023 - Licensed under GPLv3 (or later)

// Please see the included LICENSE file

console.log("Initialising OwlBoard");
const mode = process.env.NODE_ENV || "development";

// External Requires
const express = require("express");
const app = express();

// Middleware
const compression = require("compression");
const rateLimit = require("express-rate-limit");
const cors = require("cors");
const authenticate = require("./src/middlewares/auth.middlewares");

// Internal Requires
const log = require("./src/utils/logs.utils");
const version = require("./src/configs/version.configs");
const listRtr = require("./src/routes/list.routes");
const ldbRtr = require("./src/routes/ldb.routes");
const ldbsRtr = require("./src/routes/ldbs.routes");
const kubeRtr = require("./src/routes/kube.routes");
const findRtr = require("./src/routes/find.routes");
const issueRtr = require("./src/routes/issue.routes");
const statRtr = require("./src/routes/stats.routes");
const regRtr = require("./src/routes/registration.routes");
const pisRtr = require("./src/routes/pis.routes");
const trainRtr = require("./src/routes/train.routes");
const pis2Rtr = require("./src/routes/pis2.routes"); // API Version 2 Routes
const ref2Rtr = require("./src/routes/ref2.routes"); // API Version 2 Routes
const live2Rtr = require("./src/routes/live2.routes"); // API Version 2 Routes
const tt2Rtr = require("./src/routes/timetable2.routes"); // API Version 2
const user2Rtr = require("./src/routes/user2.routes"); // API Version 2 Routes
const miscRtr = require("./src/routes/misc.routes"); // Non-Public API Routes

// Set Server Configurations
const srvListen = process.env.OWL_SRV_LISTEN || "0.0.0.0";
const srvPort = process.env.OWL_SRV_PORT || 8460;

const limiter = rateLimit({
  windowMs: 15 * (60 * 1000), // 15 minutes
  max: 100, // Limit each IP to 100 requests per `window` (here, per 15 minutes)
  standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
  legacyHeaders: true, // Disable the `X-RateLimit-*` headers
});

// Print version number:
log.out(`app: Starting OwlBoard in ${mode} mode`, "init");
log.out(
  `app: Starting OwlBoard - Backend Version: ${version.app} - ` +
    `API versions: ${version.api}`,
  "init"
);

// Express Error Handling:
app.use((err, req, res, next) => {
  const statusCode = err.statuscode || 500;
  console.error(err.message, err.stack);
  res.status(statusCode).json({ message: err.message });
  return;
});

// Global Middleware:
app.use(
  cors({
    origin: "*", //[/\.owlboard\.info$/, 'localhost:5173', 'localhost:4173']
  })
);
app.use(express.json()); //JSON Parsing for POST Requests
app.use(compression()); // Compress API Data if supported by client
app.use(limiter);
app.use(authenticate);

// 2023 Rationalisation Routes (/api/v2, /misc)
app.use("/api/v2/pis", pis2Rtr); // API Version 2
app.use("/api/v2/live", live2Rtr); // API Version 2
app.use("/api/v2/ref", ref2Rtr); // API Version 2
app.use("/api/v2/timetable", tt2Rtr); // API Version 2
app.use("/api/v2/user", user2Rtr); // API Version 2
app.use("/misc", miscRtr); // Non public-api endpoints (Stats, Issue, etc.)

// Unauthenticated Routes
app.use("/api/v1/list", listRtr);
app.use("/api/v1/ldb", ldbRtr);
app.use("/api/v1/kube", kubeRtr);
app.use("/api/v1/find", findRtr);
app.use("/api/v1/issue", issueRtr);
app.use("/api/v1/stats", statRtr);
app.use("/api/v1/register", regRtr);

// Authented Routes
app.use("/api/v1/ldbs", authenticate, ldbsRtr);
app.use("/api/v1/pis", authenticate, pisRtr);
app.use("/api/v1/auth/test", authenticate, (req, res) =>
  res.status(200).json({
    status: "ok",
    message: "Authentication successful",
  })
); // Returns 401 if auth failed, 200 if successful.
app.use("/api/v1/train", authenticate, trainRtr);

// Number of proxies:
app.set("trust proxy", 4);
mode === "development"
  ? app.get("/api/v1/ip", (req, res) => res.send(req.ip))
  : null;

// Start Express
app.listen(srvPort, srvListen, (error) => {
  if (!error) {
    log.out(`app.listen: Listening on http://${srvListen}:${srvPort}`, "init");
    log.out("app.listen: State - alive", "init");
  } else {
    log.out(
      `app.listen: Error occurred, server can't start ${error.message}`,
      "err"
    );
  }
});