import { assert } from 'console'
import fastify from 'fastify'
import { json } from 'stream/consumers'
import allTodos from './todos.json' assert { type: "json" }
import fs from 'fs'
const server = fastify()

var deleteall = {
  todos: []
}
/*  Append string to file instead of overwriting it.
fs.readFile('todos.json', 'utf8', function readFileCallback(err, data){
  if (err){
      console.log(err);
  } else {
  obj = JSON.parse(data); //now it an object
  obj.table.push({id: 2, square:3}); //add some data
  json = JSON.stringify(obj); //convert it back to json
  fs.writeFile('todos.json', json, 'utf8', callback); // write it back
}});
*/

server.get('/', async (request, reply) => {
  return 'Hey, available endpoints: /getall, /deleteall, /edit, /add, /delete\n'
})


// Get all ToDos endpoint, this is the main endpoint, it'll get more requests than other endpoints.
server.get('/getall', async (request, reply) => {
  return allTodos.todos.join(", ")
})

server.get('/deleteall', async (request, reply) => {
  var json = JSON.stringify(deleteall);
  fs.writeFile('todos.json', json, 'utf8', callback);
  return 'File overwritten.'
})


server.listen(8080, (err, address) => {
  if (err) {
    console.error(err)
    process.exit(1)
  }
  console.log(`Server listening at ${address}`)
})

function callback(arg0: string, json: string, arg2: string, callback: any) {
  throw new Error('Function not implemented.')
}