node.js

const { error } = require('console')
const fs = require ('fs')
const filePath =  "./tasks.json"

const command = process.argv[2]
const argument = process.argv[3]

const loadTask = () => {
    try {
       const dataBuffer = fs.readFileSync(filePath)   // fs.readFileSync(filePath , 'utf-
       const dataJSON = dataBuffer.toString();
       return JSON.parse(dataJSON)
    } catch (error) {
        return []
    }
}

const savetask = (tasks) => {
    const dataJSON = JSON.stringify(tasks)
    fs.writeFileSync(filePath , dataJSON)
}

//Typing CMD 'init' /'add'
const addTask = (task) => {
    const tasks = loadTask()
    tasks.push(task)
    savetask(tasks)
    console.log(`${task} added to the list`);
}

//Typing CMD 'list'
const listTask = () => {
    const tasks = loadTask()
    tasks.forEach((task , index) => {
        console.log(`${index+1}.>> ${task}`);
    })
}     

//Typing CMD 'remove'
 
const deleteTask = () => {
    const tasks = loadTask()
   const index = parseInt(argument)-1
   if (index >= tasks.length || index < 0){
       console.log("Invalid index");
       return
   }
   const task = tasks.splice(index,1)
   savetask(tasks)
   console.log(`${task} this command removed from the list`);
  
   }
        

if (command ==="init"){
    addTask(argument)
}
 else if (command ==="list"){
     listTask()
}
 else if (command ==="remove"){
    deleteTask()
}
else{
  console.log("Command not found",error);
}