# syntax = docker/dockerfile:1

FROM ruby:slim as build

RUN apt-get update &&\
    apt-get install --yes build-essential git pkg-config redis

RUN gem install rails
RUN rails new demo --css tailwind

FROM ruby:slim

COPY --from=build /demo /demo
COPY --from=build /usr/local/bundle /usr/local/bundle

WORKDIR demo
RUN bin/rails generate model Visitor counter:integer &&\
    bin/rails generate channel counter

COPY <<-"EOF" app/controllers/visitors_controller.rb
class VisitorsController < ApplicationController
  def counter
    @visitor = Visitor.find_or_create_by(id: 1)
    @visitor.update! counter: @visitor.counter.to_i + 1
    @visitor.broadcast_replace_later_to 'counter',
      partial: 'visitors/counter'
  end
end
EOF

COPY <<-"EOF" app/views/visitors/counter.html.erb
<%= turbo_stream_from 'counter' %>

<div class="absolute top-0 left-0 h-screen w-screen mx-auto mb-3 bg-navy px-20 py-14 rounded-[20vh] flex flex-row items-center justify-center" style="background-color:rgb(36 24 91)">
  <img src="https://fly.io/static/images/brand/brandmark-light.svg" class="h-[50vh]" style="margin-top: -15px" alt="The monochrome white Fly.io brandmark on a navy background" srcset="">

  <div class="text-white" style="font-size: 40vh; padding: 10vh" data-controller="counter">
    <%= render "counter", visitor: @visitor %>
  </div>
</div>
EOF

COPY <<-"EOF" app/views/visitors/_counter.html.erb
<%= turbo_frame_tag(dom_id visitor) do %>
  <%= visitor.counter.to_i %>
<% end %>
EOF

COPY <<-"EOF" config/routes.rb
Rails.application.routes.draw { root "visitors#counter" }
EOF

ENV RAILS_ENV=production
RUN bin/rails assets:precompile
RUN bin/rails db:prepare

EXPOSE 3000
ENV RAILS_LOG_TO_STDOUT=true
ENV RAILS_SERVE_STATIC_FILES=true
CMD bin/rails server