const express = require('express')
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.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)

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

// 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) {
    if (DEBUG) console.log('Adding', pledge.get('amount'))

    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)
  })
})

// 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,
}