const express = require('express')
const bodyParser = require('body-parser')
const path = require('path')

require('dotenv').config()

// set up debug
let DEBUG

if (process.env.DEBUG || process.env.CROWDFUNDING_SITE_DEBUG) {
  DEBUG = true
} else {
  DEBUG = false
}

if (DEBUG) console.log('Starting website in debug mode')

// get goal details
const goalPeople = Number(process.env.CROWDFUNDING_SITE_GOAL_PEOPLE) || 750
const goalRupees = Number(process.env.CROWDFUNDING_SITE_GOAL_RUPEES) || 500000

// set up knex (for database)
const knex = require('knex')({
  client:'sqlite3',
  connection:{
    filename:'./donors.sqlite'
  },
  useNullAsDefault: true
})

knex.schema.hasTable('pledges').then(function(exists) {
  if (!exists) {
    if (DEBUG) console.debug('No table exists! Creating one now...')
    return knex.schema.createTable('pledges', function(t) {
      t.increments('id').primary()
      t.timestamp('created_at').defaultTo(knex.fn.now()).notNullable()
      t.boolean('was_robot').defaultTo(true)

      t.integer('amount').notNullable()
			t.boolean('overseas')
      t.string('name', 128)
      t.boolean('anonymous')
      t.string('email', 128)
      t.string('phone', 32)
      t.integer('retry_times').defaultTo(10)
      t.boolean('get_newsletter').defaultTo(false)
      t.text('other_message')
    })
  }
})

// set up bookshelf (for easy interface for database)
bookshelf = require('bookshelf')(knex)

const Pledge = bookshelf.model('Pledge', {
  tableName: 'pledges',
})

// decide base url and port for app (can be configured)
const baseUrl = process.env.CROWDFUNDING_SITE_BASE_URL || '/'
const port = process.env.CROWDFUNDING_SITE_PORT || 5000

// set up twing
const {TwingEnvironment, TwingLoaderFilesystem} = require('twing')
let loader = new TwingLoaderFilesystem(path.resolve(__dirname, '..', 'dist'))
let twing = new TwingEnvironment(loader)

// set up express
const app = express()

const router = express.Router()
app.use(baseUrl, router)

router.use(bodyParser.urlencoded({
  extended: true,
}))

// main views
router.get('/', async (req, res) => {
  if (DEBUG) console.debug('Returning home page')

  // count people
  // TODO: optimise to do using SQL only
  let total_people = 0
  let total_rupees = 0
  let result = await Pledge.fetchAll()

  for (let pledge of result.models) {
    total_people += 1
    total_rupees += pledge.get('amount')
  }

  twing.render('index.html', {
    'goal_rupees': Number(goalRupees).toLocaleString('en-IN'),
    'goal_people': Number(goalPeople).toLocaleString('en-IN'),
    'progress_rupees': Number(total_rupees).toLocaleString('en-IN'),
    'progress_people': Number(total_people).toLocaleString('en-IN'),
    'percent_rupees': `style="width: ${total_rupees/goalRupees*100}%"`,
    'percent_people': `style="width: ${total_people/goalPeople*100}%"`,
  }).then((output) => {
    res.end(output)
  })
})

router.post('/pledge', async (req, res) => {
  if (DEBUG) console.debug('New pledge:', req.body)

  // validate pledge
  let errors = []

	let submit = req.body.submit
  if (submit != 'Save Pledge') {
		errors.push("This request seems to have been tampered with. Are you sure it wasn't you doing the tampering?")
	}

  let robo = req.body.robo
  if(robo != 'no') {
    errors.push('Only humans are allowed to donate money. Robots are too digital 🙁')
  }

  let amount = req.body.amount
  if (!amount || amount == 'custom') {
    amount = req.body['amount-custom']
  }
  if (!amount || amount <= 0) {
    errors.push('Pledge amount too small. Please choose at least a rupee!')
  }
  try {
    amount = Number(amount)
  } catch (err) {
    errors.push('Invalid amount. Please choose a positive number!')
  }

	let name = req.body.name
	if (name.length <=0) {
		errors.push('What is your name? You can be anonymous to the world but at least we should know...')
	}

	let anonymous = req.body.anonymous == 'on' ? true : false

	let email = req.body.email
	if (email.length < 5) {
		errors.push('Please enter a valid email address')
	}

	let phone = req.body.phone
	let newsletter = req.body.newsletter == 'yes' ? true : false
	let overseas = req.body.overseas == 'yes' ? true : false
	let messages = req.body.messages

	if (!!errors.length) {
		res.send(`Errors: ${'' + errors}`)
		return
	}

	// save the info
	let pledge = new Pledge()
	pledge.set('was_robot', robo)
	pledge.set('amount', amount)
	pledge.set('overseas', overseas)
	pledge.set('name', name)
	pledge.set('anonymous', anonymous)
	pledge.set('email', email)
	pledge.set('phone', phone)
	pledge.set('get_newsletter', newsletter)
	pledge.set('other_message', messages)

	if (DEBUG) console.debug (`Saving pledge: ${JSON.stringify(pledge)}`)

	try {
		await pledge.save()
	} catch (err) {
		res.send("Sorry, something went wrong while saving your pledge and we don't know what 🙁. Please try again...")
		return
	}

	res.send("Thank you! We're still working on setting up this website, so as you can see this page doesn't look great at the moment, but we will be sending you a confirmation email in a few days. Watch out for an email from editors@snipettemag.com, and if it doesn't reach, check your spam box :P")
})

router.use(express.static('dist'))

// start the listener!
app.listen(port, () => {
  console.log(`Server is up at port ${port}`)
})

// end note: in case we want to import this somewhere for testing
module.exports = {
  knex,
  bookshelf,
  Pledge,
  router,
}