User: Task: "Bulk delete Todo Item"
    Description: "Generate a Node.js controller function to create a new todo item using the Mongoose Todo model."
    Requirements:
    - Database: mongoose
    - Authentication: user
    - Output needed: Return only the function code.
    - Dependencies: Create a function to delete multiple todo items. Export the function itself. Function mode: exports.functionName = async () => {...}, 
Accept parameter: an array of ids from the request body., 
Validate required field: Ensure the ids array is provided and not empty., 
Use the Todo model to delete all records in the database that match the provided ids., 
Respond with a success message indicating how many items were deleted., 
Handle errors, such as empty or invalid ids array, and return appropriate error messages.
    - Previous Code 
const mongoose = require('mongoose');
const  Todo  = require('../models/Todo'); // Assumes Todo model is exported from models/Todo.js
// Export the function as per the specified mode
exports.createTodoItem = async (req, res) => {
  try {
    const { title, description, status, priority, dueDate } = req.body;

    // Validate required fields
    if (!title || !status) {
      return res.status(400).json({ error: 'Title and status are required.' });
    }

    // Create a new Todo item using the Todo model
    const newTodo = new Todo({
      title,
      description,
      status,
      priority,
      dueDate,
    });

    // Save to the database
    const savedTodo = await newTodo.save();

    // Respond with the created todo details and a success message
    return res.status(201).json({
      message: 'Todo item created successfully.',
      todo: savedTodo,
    });
  } catch (error) {
    // Handle any errors
    return res.status(500).json({ error: 'An error occurred while creating the todo item.' });
  }
};

// Import required dependencies
// const mongoose = require('mongoose');
// const { Todo } = require('../models/Todo'); // Assumes Todo model is exported from models/Todo.js

// Export the function to update a todo item
exports.updateTodoItem = async (req, res) => {
  try {
    const { id } = req.params; // Get the id from the URL parameters
    const { title, description, status, priority, dueDate } = req.body; // Get the fields from the request body

    // Simple validation to check if id is provided and is a valid MongoDB ObjectId
    if (!id || !mongoose.Types.ObjectId.isValid(id)) {
      return res.status(400).json({ error: 'A valid todo item ID is required.' });
    }

    // Update the Todo item in the database using the provided id
    const updatedTodo = await Todo.findByIdAndUpdate(
      id,
      { title, description, status, priority, dueDate },
      { new: true, runValidators: true } // Return the updated document
    );

    // Check if the todo item was found and updated
    if (!updatedTodo) {
      return res.status(404).json({ error: 'Todo item not found.' });
    }

    // Respond with the updated todo details and a success message
    return res.status(200).json({
      message: 'Todo item updated successfully.',
      todo: updatedTodo,
    });
  } catch (error) {
    // Handle any errors
    return res.status(500).json({ error: 'An error occurred while updating the todo item.' });
  }
};

exports.deleteTodoItem = async (req, res) => {
  try {
    const { id } = req.params; // Get the id from the URL parameters

    // Validate that id is provided and is a valid MongoDB ObjectId
    if (!id || !mongoose.Types.ObjectId.isValid(id)) {
      return res.status(400).json({ error: 'A valid todo item ID is required.' });
    }

    // Find and delete the Todo item in the database using the provided id
    const deletedTodo = await Todo.findByIdAndDelete(id);

    // Check if the todo item was found and deleted
    if (!deletedTodo) {
      return res.status(404).json({ error: 'Todo item not found.' });
    }

    // Respond with a success message indicating the item was deleted
    return res.status(200).json({ message: 'Todo item deleted successfully.' });
  } catch (error) {
    // Handle any errors
    return res.status(500).json({ error: 'An error occurred while deleting the todo item.' });
  }
};

// Import required dependencies
// const mongoose = require('mongoose');
// const { Todo } = require('../models/Todo'); // Assumes Todo model is exported from models/Todo.js

// Export the function to bulk delete todo items
exports.bulkDeleteTodoItems = async (req, res) => {
  try {
    const { ids } = req.body; // Get the array of ids from the request body

    // Validate that ids is provided and is not empty
    if (!ids || !Array.isArray(ids) || ids.length === 0) {
      return res.status(400).json({ error: 'A non-empty array of ids is required.' });
    }

    // Use the Todo model to delete all records that match the provided ids
    const deleteResult = await Todo.deleteMany({ _id: { $in: ids.map(id => mongoose.Types.ObjectId(id)) } });

    // Respond with a success message indicating how many items were deleted
    return res.status(200).json({
      message: `${deleteResult.deletedCount} todo item(s) deleted successfully.`,
    });
  } catch (error) {
    // Handle any errors
    return res.status(500).json({ error: 'An error occurred while deleting the todo items.' });
  }
};

    - Supporting data 
    - Updating File "src/controllers/TodoController.js"
    
    Please generate the code for this task, following the instructions and including comments for clarity.
    While creating router for specifict file your have to read supporing file data and create for that 

    **Output Formats**: 

Return dependencies like this `const bcrypt = require('bcrypt');`  in this formate
```dependencies
const bcrypt = require('bcrypt');
```

Ensure this format is consistently followed in responses.
    
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