require "rqrcode"

class WalletController < ApplicationController
  before_action :require_user_signed_in
  before_action :authenticate_with_lndhub

  def index
    @current_section = :wallet

    @wallet_url = "lndhub://#{current_user.ln_login}:#{current_user.ln_password}@#{ENV['LNDHUB_PUBLIC_URL']}"

    qrcode = RQRCode::QRCode.new(@wallet_url)
    @svg = qrcode.as_svg(
      color: "000",
      shape_rendering: "crispEdges",
      module_size: 6,
      standalone: true,
      use_path: true,
      svg_attributes: {
        class: 'inline-block'
      }
    )

    @balance = fetch_balance rescue nil
  end

  private

  def authenticate_with_lndhub
    if session["ln_auth_token"].present?
      @ln_auth_token = session["ln_auth_token"]
    else
      lndhub = Lndhub.new
      auth_token = lndhub.authenticate(current_user)
      session["ln_auth_token"] = auth_token
      @ln_auth_token = auth_token
    end
  rescue
    # TODO add exception tracking
  end

  def fetch_balance
    lndhub = Lndhub.new
    data = lndhub.balance @ln_auth_token
    data["BTC"]["AvailableBalance"]
  end
end