const fs = require('fs');

var fetchNotes = () => {

try{

var notesString = fs.readFileSync('notes-data.json');

return JSON.parse(notesString);

} catch(e){

return [];

}

};

var saveNotes = (notes) => {

fs.writeFileSync('notes-data.json',JSON.stringify(notes));

};

var addNote = (title, body) => {

var notes = fetchNotes();

var note = {

title,

body,

};

var duplicateNotes = notes.filter((note) => note.title === title );

if (duplicateNotes.length ===0){

notes.push(note);

saveNotes(notes);

return note;

}

};

var getAll = () => {

return fetchNotes();

};

var getNote = (title) => {

var notes = fetchNotes();

var filteredNotes = notes.filter((note) => note.title === title);

return filteredNotes[0];

};

var removeNote = (title) => {

var notes = fetchNotes();

var filteredNotes = notes.filter((note) => note.title !== title );

saveNotes(filteredNotes);

return notes.length !== filteredNotes.length;

};

var logNote = (note) => {

console.log(`---`);

console.log(`Title : ${note.title}`);

console.log(`Body: ${note.body}`);

};

module.exports = {

addNote,

getAll,

getNote,

removeNote,

logNote

};