import bodyParser from "body-parser";
import compression from "compression";
import cors from "cors";
import dotenv, { config } from "dotenv";
import express, { Express } from "express";
import helmet from "helmet";
import morgan from "morgan";
import nocache from "nocache";
import path, { resolve } from "path";
import responseTime from "response-time";
import winston from "winston";
import DailyRotateFile from "winston-daily-rotate-file";
import BillRequestValidator from "./bills/billRequestValidator.js";
import { BillsListMedia } from "./bills/billsListMedia.js";
import { BillsMediaUploadMulter, BillsUploadMedia } from "./bills/billsUploadMedia.js";
import validateJobRequest from "./jobs/jobRequestValidator.js";
import { JobsDeleteMedia } from "./jobs/jobsDeleteMedia.js";
import { jobsDownloadMedia } from "./jobs/jobsDownloadMedia.js";
import { JobsListMedia } from "./jobs/jobsListMedia.js";
import { JobsMoveMedia } from "./jobs/jobsMoveMedia.js";
import { JobMediaUploadMulter, jobsUploadMedia } from "./jobs/jobsUploadMedia.js";
import InitServer, { FolderPaths } from "./util/serverInit.js";
import ValidateImsToken from "./util/validateToken.js";
import { dailyS3Scheduler } from "./util/dailyS3Scheduler.js";
import { analyzeJobsDirectory } from "./util/s3Sync.js";

dotenv.config({
  path: resolve(process.cwd(), `.env.${process.env.NODE_ENV || "development"}`)
});

// Global error handlers
process.on("uncaughtException", (error) => {
  console.error("Uncaught Exception:", error);
  process.exit(1);
});

process.on("unhandledRejection", (reason, promise) => {
  console.error("Unhandled Rejection at:", promise, "reason:", reason);
  process.exit(1);
});

// Logger setup
const commonTransportConfig = {
  maxSize: "20m",
  maxFiles: 14,
  tailable: true,
  zippedArchive: true,
  format: winston.format.combine(winston.format.timestamp(), winston.format.json()),
  datePattern: "YYYY-MM-DD"
};

const baseFormat = winston.format.combine(
  winston.format.timestamp(),
  winston.format.errors({ stack: true }),
  winston.format.json(),
  winston.format.prettyPrint()
);

export const logger = winston.createLogger({
  format: baseFormat,
  level: "http",
  levels: { ...winston.config.syslog.levels, http: 8 },
  exceptionHandlers: [
    new DailyRotateFile({
      filename: path.join(FolderPaths.Root, "logs", "exceptions-%DATE%.log"),
      ...commonTransportConfig
    })
  ],
  rejectionHandlers: [
    new DailyRotateFile({
      filename: path.join(FolderPaths.Root, "logs", "rejections-%DATE%.log"),
      ...commonTransportConfig
    })
  ],
  transports: [
    new DailyRotateFile({
      filename: path.join(FolderPaths.Root, "logs", "errors-%DATE%.log"),
      level: "error",
      ...commonTransportConfig
    }),
    new DailyRotateFile({
      filename: path.join(FolderPaths.Root, "logs", "debug-%DATE%.log"),
      level: "debug",
      ...commonTransportConfig
    }),
    new DailyRotateFile({
      filename: path.join(FolderPaths.Root, "logs", "ALL-%DATE%.log"),
      ...commonTransportConfig
    }),
    new winston.transports.Console({
      format: winston.format.combine(winston.format.colorize(), winston.format.timestamp(), winston.format.simple())
    })
  ]
});

// App init
const app: Express = express();
const port = process.env.PORT;
app.disable("x-powered-by");
app.set("trust proxy", 1);

// Middleware order: security, logging, parsing, etc.
app.set("etag", false);
app.use(helmet({ crossOriginResourcePolicy: { policy: "cross-origin" } }));
app.use(nocache());
app.use(cors());
app.use(compression());
app.use(responseTime());

app.use(bodyParser.json({ limit: "1000mb" }));
app.use(bodyParser.urlencoded({ limit: "1000mb", extended: true }));

app.use((req, res, next) => {
  res.setHeader("Connection", "keep-alive");
  next();
});

const morganMiddleware = morgan("combined", {
  stream: { write: (message) => logger.http(message.trim()) }
});
app.use(morganMiddleware);

//Asynchronously check the headers for a bodyshopid. If it exists, write it to a json file in the root directory. Only do this if the bodyshopid has not already been logged once since server start.
const loggedBodyshopIds = new Set<string>();

app.use((req, res, next) => {
  //Asynchronously check the headers for a bodyshopid. If it exists, write it to a json file in the root directory. Only do this if the bodyshopid has not already been logged once since server start.
  const bodyshopId = req.headers.bodyshopid as string;
  if (bodyshopId && !loggedBodyshopIds.has(bodyshopId)) {
    loggedBodyshopIds.add(bodyshopId);
    // Asynchronously write to file without blocking the request
    (async () => {
      try {
        const fs = await import("fs/promises");
        let existingIds: string[] = [];
        try {
          const fileContent = await fs.readFile(FolderPaths.Config, "utf-8");
          const configFile = JSON.parse(fileContent);
          existingIds = configFile.bodyshopIds || [];
        } catch {
          // File doesn't exist or is invalid, start with empty array
        }
        if (!existingIds.includes(bodyshopId)) {
          existingIds.push(bodyshopId);
          await fs.writeFile(FolderPaths.Config, JSON.stringify({ bodyshopIds: existingIds }, null, 2));
          logger.info(`Logged new bodyshop ID: ${bodyshopId}`);
        }
      } catch (error) {
        logger.error("Failed to log bodyshop ID:", error);
      }
    })();
  }
  next();
});

// Job endpoints
app.post("/jobs/list", ValidateImsToken, validateJobRequest, JobsListMedia);
app.post("/jobs/upload", ValidateImsToken, JobMediaUploadMulter.array("file"), validateJobRequest, jobsUploadMedia);
app.post("/jobs/download", ValidateImsToken, validateJobRequest, jobsDownloadMedia);
app.post("/jobs/move", ValidateImsToken, JobsMoveMedia);
app.post("/jobs/delete", ValidateImsToken, JobsDeleteMedia);

// Bill endpoints
app.post("/bills/list", BillRequestValidator, BillsListMedia);
app.post(
  "/bills/upload",
  ValidateImsToken,
  BillsMediaUploadMulter.array("file"),
  BillRequestValidator,
  BillsUploadMedia
);

// Health and root
app.get("/", ValidateImsToken, (req, res) => {
  res.send("IMS running.");
});
app.get("/health", (req, res) => {
  res.status(200).send("OK");
});

// S3 sync status endpoint
app.get("/sync/status", ValidateImsToken, async (req, res) => {
  try {
    const status = await dailyS3Scheduler.getStatus();
    res.json(status);
  } catch (error) {
    logger.error("Failed to get sync status:", error);
    const errorMessage = error instanceof Error ? error.message : "Unknown error";
    res.status(500).json({ error: errorMessage });
  }
});

// Manual S3 sync trigger endpoint (for testing)
// app.post("/sync/trigger", ValidateImsToken, async (req, res) => {
//   try {
//     await dailyS3Scheduler.triggerManualSync();
//     res.json({ success: true, message: "Manual sync triggered successfully" });
//   } catch (error) {
//     logger.error("Manua--l sync failed:", error);
//     const errorMessage = error instanceof Error ? error.message : "Unknown error";
//     res.status(500).json({ success: false, message: "Manual sync failed", error: errorMessage });
//   }
// });

// Jobs directory analysis endpoint
app.get("/jobs/analysis", ValidateImsToken, async (req, res) => {
  try {
    const analysis = await analyzeJobsDirectory();
    res.json(analysis);
  } catch (error) {
    logger.error("Failed to analyze jobs directory:", JSON.stringify(error, null, 2));
    const errorMessage = error instanceof Error ? error.message : "Unknown error";
    res.status(500).json({ success: false, message: "Jobs analysis failed", error: errorMessage });
  }
});

// Static files
InitServer();
app.use(FolderPaths.StaticPath, express.static(FolderPaths.Root, { etag: false, maxAge: 30 * 1000 }));
app.use("/assets", express.static("/assets", { etag: false, maxAge: 30 * 1000 }));

// Start the daily S3 sync scheduler
dailyS3Scheduler
  .start()
  .then(() => {
    logger.info("Sync scheduler started successfully.");
  })
  .catch((error) => {
    logger.error("Failed to start sync scheduler:", error);
  });

app.listen(port, () => {
  logger.info(`ImEX Media Server is running at http://localhost:${port}`);
});