const fs = require('fs')
const Handlebars = require('handlebars')
const { ifEq } = require('./helpers')
const ListingSet = require('./ListingSet')
const i18n = require('./i18n.json')

Handlebars.registerHelper('if_eq', ifEq)

class Output {
  constructor () {
    this.items = []
    this.timestamp = null
  }

  addItem (...p) {
    this.items.push(new ListingSet(...p))
  }

  async _compileTemplate () {
    const templateFile = await fs.readFileSync('./src/output/template.hbs', 'utf8')
    return Handlebars.compile(templateFile)
  }

  async _writeToFile (filename, content) {
    try {
      await fs.unlinkSync(filename)
    } catch {
      console.log('File probably doesnt exist')
    }
    fs.writeFileSync(filename, content, 'utf8')
  }

  async submit () {
    this.timestamp = new Date()
    const template = await this._compileTemplate()

    Object.keys(i18n).forEach(locale => {
      const filename = i18n[locale].link || 'index'
      this._writeToFile(`./public/${filename}.html`, template({
        ...this,
        t: i18n[locale],
        languages: i18n
      }))
    })
  }
}

module.exports = new Output()