const express = require('express');
const fs = require('fs');
const path = require('path');
const router = express.Router();
const fileUpload = require('express-fileupload');
const authMiddleware = require('../../../Middlewares/authMiddleware');
const { loggers } = require('winston');
const ncp = require('ncp').ncp;
const configFile = fs.readFileSync(path.join(__dirname, '../../../data', 'setup.json'), 'utf-8')
const config = JSON.parse(configFile);
const bodyParser = require('body-parser');
const crypto = require('crypto');
const os = require('os');
const { getUserData, getSetupData } = require('../../../Middlewares/watcherMiddleware');
const { logger, logRequestInfo, ErrorLogger, authLogger } = require('../../../config/logs');

let setupData = getSetupData();
let userData = getUserData();
router.use(bodyParser.json());

/**
 * @swagger
 * /dashboard/rename?token={token}:
 *   post:
 *     security:
 *       - bearerAuth: []
 *     tags:
 *       - File
 *     summary: Rename a file
 *     description: This route allows you to rename a file. It requires a valid JWT token in the Authorization header.
 *     requestBody:
 *       required: true
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               currentName:
 *                 type: string
 *                 description: The current name of the file
 *               newName:
 *                 type: string
 *                 description: The new name for the file
 *     parameters:
 *       - in: header
 *         name: Authorization
 *         required: true
 *         schema:
 *           type: string
 *         description: The JWT token of your account to have access
 *     responses:
 *       200:
 *         description: Success
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 message:
 *                   type: string
 *       400:
 *         description: Bad Request
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 message:
 *                   type: string
 *       401:
 *         description: Unauthorized
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 message:
 *                   type: string
 *       500:
 *         description: Error renaming the file
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 message:
 *                   type: string
 *                 error:
 *                   type: string
 */

function authenticateToken(req, res, next) {
    let token = null;
    const authHeader = req.headers['authorization'];

    if (authHeader) {
        token = authHeader.split(' ')[1];
    } else if (req.query.token) {
        token = req.query.token;
    }

    if (token == null) {
        if (req.user) {
            return next();
        } else {
            return res.status(401).json({ message: 'Unauthorized' });
        }
    }

    fs.readFile(path.join(__dirname, '../../../data', 'user.jso,'), 'utf8', (err, data) => {
        if (err) {
            console.error('Error reading user.json:', err);
            return res.status(401).json({ message: 'Unauthorized' });
        }

        const users = JSON.parse(data);

        const user = users.find(u => u.token === token);

        if (user) {
            console.log('User found:', user);
            req.user = user;
            req.userData = user;
            next();
        } else {
            console.log('No user found for token:', token);
            return res.status(401).json({ message: 'Unauthorized' });
        }
    });
}

router.get('/', (req, res) => {
    res.status(400).json({ error: 'Bad Request. The request cannot be fulfilled due to bad syntax or missing parameters.' });
});

router.post('/', authMiddleware, async (req, res) => {
  const userId = req.userData.name;
  const { currentName, newName } = req.body;
  const filePath = path.join(req.params.filePath || '', req.params[0] || '');

  if (!currentName || !newName) {
      return res.status(400).json('Both currentName and newName must be provided.');
  }

  const userDir = path.join('cdn-files', userId);
  const currentPath = path.join(userDir, filePath, currentName);
  const newPath = path.join(userDir, filePath, newName);

  if (!currentPath.startsWith(userDir) || !newPath.startsWith(userDir)) {
      ErrorLogger.error('Unauthorized directory access attempt');
      return res.status(403).json('Unauthorized directory access attempt');
  }

  try {
      await fs.promises.rename(currentPath, newPath);

      const data = await fs.promises.readFile(path.join(__dirname, '../../../data', 'file_info.json'), 'utf8');
      let fileInfo = JSON.parse(data);

      let found = false;
      for (let i = 0; i < fileInfo.length; i++) {
          if (fileInfo[i].fileName === currentName) {
              fileInfo[i].fileName = newName;
              found = true;
              break;
          }
      }

      if (found) {
          await fs.promises.writeFile(path.join(__dirname, '../../../data', 'file_info.json'), JSON.stringify(fileInfo, null, 2), 'utf8');
      }

      res.status(200).json('Operation was successful.');  
  } catch (err) {
      console.error(err);
      return res.status(500).json('Error renaming the file.');
  }
});

router.post('/:filePath*', authMiddleware, async (req, res) => {
    const userId = req.userData.name;
    const { currentName, newName } = req.body;
    const filePath = path.join(req.params.filePath, req.params[0] || '');

    if (!currentName || !newName) {
        return res.status(400).json('Both currentName and newName must be provided.');
    }

    const userDir = path.join('cdn-files', userId);
    const currentPath = path.join(userDir, filePath, currentName);
    const newPath = path.join(userDir, filePath, newName);

    if (!currentPath.startsWith(userDir) || !newPath.startsWith(userDir)) {
        ErrorLogger.error('Unauthorized directory access attempt');
        return res.status(403).json('Unauthorized directory access attempt');
    }

    try {
        await fs.promises.rename(currentPath, newPath);

        const data = await fs.promises.readFile(path.join(__dirname, '../../../data', 'file_info.json'), 'utf8');
        let fileInfo = JSON.parse(data);

        let found = false;
        for (let i = 0; i < fileInfo.length; i++) {
            if (fileInfo[i].fileName === currentName) {
                fileInfo[i].fileName = newName;
                found = true;
                break;
            }
        }

        if (found) {
            await fs.promises.writeFile(path.join(__dirname, '../../../data', 'file_info.json'), JSON.stringify(fileInfo, null, 2), 'utf8');
        }

        res.status(200).json('Operation was successful.');  
    } catch (err) {
        console.error(err);
        return res.status(500).json('Error renaming the file.');
    }
});

module.exports = router;