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
    )

    @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
      res = Faraday.post("#{ENV["LNDHUB_API_URL"]}/auth?type=auth",
                         { login: current_user.ln_login, password: current_user.ln_password }.to_json,
                         "Content-Type" => "application/json",
                         "Accept" => "application/json")

      credentials = JSON.parse(res.body)
      session["ln_auth_token"] = credentials["access_token"]
      @ln_auth_token = credentials["access_token"]
    end
  rescue
    # TODO add exception tracking
  end

  def fetch_balance
      res = Faraday.get("#{ENV["LNDHUB_API_URL"]}/balance", {}, {
        "Content-Type" => "application/json",
        "Accept" => "application/json",
        "Authorization" => "Bearer #{@ln_auth_token}"
      })

      data = JSON.parse(res.body)
      data["BTC"]["AvailableBalance"]
  end
end