var express = require('express')
var app = express()
var fs = require('fs');
var bodyParser = require('body-parser');
var helmet = require('helmet')
app.use(helmet());
var session = require('express-session');
var FileStore= require('session-file-store')(session);
var template = require('./lib/template.js');
var url='https://api.edamam.com/api/food-database/parser';

var low =require('lowdb')
var FileSync = require('lowdb/adapters/FileSync');
var adapter = new FileSync('db.json');
var db=low(adapter);
db.defaults({users:[]}).write();


app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(session({
  secret: 'asadlfkj!@#!@#dfgasdg',
  resave: false,
  saveUninitialized: true,
  store: new FileStore()
}))





app.use(express.static('data'));
app.get('/', function(request, response) { 
  
    fs.readFile('./contents/main.html', function(error, body){
      var title = 'Health Care';
      var ch='15ch'
      var html = template.HTML(title,ch,'',body,''); 
      response.send(html);
    });
  });

  app.post('/login_process', function(request, response) { 
   var post = request.body;
   var ID=post.ID;
   var password=post.pwd;
   var user = db.get('users').find({ID:ID,password:password}).value();
       if(user){
        request.session.is_logined = true;

        request.session.save(function(){
          response.redirect('/InputPage')
        });
       }
       
     
   
  
    
   
   
  });

  app.get('/signup', function(request, response) { 
    fs.readFile('./contents/signup.html', function(error, body){
      var title = 'Sign Up Page';
      var ch='5ch'
      var html = template.HTML(title,ch,`<link rel="stylesheet" type="text/css" href="./a.css" />`,body,''); 
      response.send(html);
    });
  });


  app.post('/signup_process', function(request, response) { 
    var post = request.body;
    var ID=post.ID;
    var pwd=post.pwd;
    var age=post.age;
    var gender=post.gender;
    var height=post.height;
    var weight=post.weight;
    db.get('users').push({
      ID:ID,
      password:pwd,
      age:age,
      gender:gender,
      height:height,
      weight:weight
    }).write();
    request.session.is_logined = true;
    request.session.ID = ID;
    request.session.save(function(){
      response.redirect('/InputPage')
    });
    
  });


  app.get('/InputPage', function(request, response){
    fs.readFile('./contents/Input.html', function(error, body){
      var title = 'Input Page';
      var ch='5ch'
      var html = template.HTML(title,ch,``,body,`#logout{
        position:absolute;
        right: 20ch;
    }`); 
      response.send(html);
    });
  });

  app.get('/logout', function(request, response) { 
    request.session.destroy(function(err){
      response.redirect('/');
    })
  });

  app.listen(3000, function() {
    console.log('Example app listening on port 3000!')
  });