import dotenv from 'dotenv';
import { userModel } from '../../schemas/management/user.schema.js';
import log4js from 'log4js';
import mongoose from 'mongoose';
import { distributeUpdate, editAuditLog } from '../../utils.js';

dotenv.config();

const logger = log4js.getLogger('Users');
logger.level = process.env.LOG_LEVEL;

export const listUsersRouteHandler = async (
  req,
  res,
  page = 1,
  limit = 25,
  property = '',
  filter = {},
  search = '',
  sort = '',
  order = 'ascend'
) => {
  try {
    // Calculate the skip value based on the page number and limit
    const skip = (page - 1) * limit;

    let user;
    let aggregateCommand = [];

    if (search) {
      // Add a text search match stage for name and brand fields
      aggregateCommand.push({
        $match: {
          $text: {
            $search: search,
          },
        },
      });
    }

    if (filter != {}) {
      // use filtering if present
      aggregateCommand.push({ $match: filter });
    }

    if (property != '') {
      aggregateCommand.push({ $group: { _id: `$${property}` } }); // group all same properties
      aggregateCommand.push({ $project: { _id: 0, [property]: '$_id' } }); // rename _id to the property name
    }

    // Add sorting if sort parameter is provided
    if (sort) {
      const sortOrder = order === 'descend' ? -1 : 1;
      aggregateCommand.push({ $sort: { [sort]: sortOrder } });
    }

    aggregateCommand.push({ $skip: skip });
    aggregateCommand.push({ $limit: Number(limit) });

    console.log(aggregateCommand);

    user = await userModel.aggregate(aggregateCommand);

    logger.trace(`List of users (Page ${page}, Limit ${limit}, Property ${property}):`, user);
    res.send(user);
  } catch (error) {
    logger.error('Error listing users:', error);
    res.status(500).send({ error: error });
  }
};

export const getUserRouteHandler = async (req, res) => {
  try {
    // Get ID from params
    const id = new mongoose.Types.ObjectId(req.params.id);
    // Fetch the user with the given ID
    const user = await userModel.findOne({
      _id: id,
    });

    if (!user) {
      logger.warn(`User not found with supplied id.`);
      return res.status(404).send({ error: 'User not found.' });
    }

    logger.trace(`User with ID: ${id}:`, user);

    res.send({ ...user._doc });
  } catch (error) {
    logger.error('Error fetching User:', error);
    res.status(500).send({ error: error.message });
  }
};

export const editUserRouteHandler = async (req, res) => {
  try {
    // Get ID from params
    const id = new mongoose.Types.ObjectId(req.params.id);
    // Fetch the user with the given ID
    const user = await userModel.findOne({ _id: id });

    if (!user) {
      // Error handling
      logger.warn(`User not found with supplied id.`);
      return res.status(404).send({ error: 'User not found.' });
    }

    logger.trace(`User with ID: ${id}:`, user);

    try {
      const updateData = {
        updatedAt: new Date(),
        username: req.body.username,
        name: req.body.name,
        firstName: req.body.firstName,
        lastName: req.body.lastName,
        email: req.body.email,
      };

      console.log(req.user);

      // Create audit log before updating
      await editAuditLog(user.toObject(), updateData, id, 'user', req.user);

      const result = await userModel.updateOne({ _id: id }, { $set: updateData });
      if (result.nModified === 0) {
        logger.error('No User updated.');
        res.status(500).send({ error: 'No users updated.' });
      }

      await distributeUpdate(updateData, id, 'user');
    } catch (updateError) {
      logger.error('Error updating user:', updateError);
      res.status(500).send({ error: updateError.message });
    }
    res.send('OK');
  } catch (fetchError) {
    logger.error('Error fetching user:', fetchError);
    res.status(500).send({ error: fetchError.message });
  }
};