import express from "express";

import cors from "cors";

import bodyParser from "body-parser";

import mainRouter from "@app/routes/main";

import userRouter from "@app/routes/users";

import authRouter from "@app/routes/auth";

import moodRouter from "@app/routes/moods";

import triggerRouter from "@app/routes/triggers";

import sleepRecordRouter from "@app/routes/sleepRecords";

import insightRouter from "@app/routes/insights";

import careActionsRouter from "@app/routes/careActions";

import medicineRegimensRouter from "@app/routes/medicineRegimens";

import exportsRouter from "@app/routes/exports";

import reportRouter from "@app/reports/report.router";

import { errorHandler } from "@app/middleware/errorHandler";

import { logger } from "@app/lib/logger";

import { PrismaClient } from "@prisma/client";

import {

  bootWorkers,

  closeAllWorkers,

  closeAllQueues,

  scheduleInsights,

} from "@app/lib/queue";

import pinoHttp from "pino-http";

import { randomUUID } from "crypto";

import path from "path";

export function createApp() {

  const app = express();

  bootWorkers();

  scheduleInsights();

  // Use pino-http for HTTP logging (better than Morgan for structured logs)

  // Registered before the rest so every request has a logger attached,

  // including errors raised by the CORS and body-parsing middleware below

  app.use(

    pinoHttp({

      logger,

      genReqId: (req, res) => {

        const header = req.headers["x-request-id"];

        const requestId =

          (Array.isArray(header) ? header[0] : header) || randomUUID();

        res.setHeader("X-Request-Id", requestId);

        return requestId;

      },

    }),

  );

  // Configure CORS

  app.use(

    cors({

      origin: process.env.FRONTEND_URL || "*",

      credentials: true,

    }),

  );

  app.use(bodyParser.json());

  app.use("/users", userRouter);

  app.use("/auth", authRouter);

  app.use("/moods", moodRouter);

  app.use("/sleep_records", sleepRecordRouter);

  app.use("/triggers", triggerRouter);

  app.use("/insights", insightRouter);

  app.use("/care-actions", careActionsRouter);

  app.use("/medicine-regimens", medicineRegimensRouter);

  app.use("/exports", exportsRouter);

  app.use("/reports", reportRouter);

  app.use(errorHandler); // always last

  // TODO: flesh the actual page here

  app.use(express.static(path.join(__dirname, "./static")));

  app.get(/.*/, (req, res) => {

    res.sendFile(path.join(__dirname, "./static/index.html"));

  });

  process.on("SIGTERM", shutdown);

  process.on("SIGINT", shutdown);

  return app;

}

const shutdown = async () => {

  await Promise.all([closeAllWorkers(), closeAllQueues()]);

  process.exit(0);

};