#!/usr/bin/env ruby
# frozen_string_literal: true

require 'pathname'

RAILS_ROOT = File.expand_path("../../", Pathname.new(__FILE__).realpath)
PORT = ENV["UNICORN_PORT"] ||= "3000"
HOSTNAME = ENV["DISCOURSE_HOSTNAME"] ||= "127.0.0.1"
YARN_DIR = File.join(RAILS_ROOT, "app/assets/javascripts/discourse")
CUSTOM_ARGS = ["--try", "--test", "--build", "--unicorn", "-u", "--forward-host"]
PROXY =
  if ARGV.include?("--try")
    "https://try.discourse.org"
  else
    "http://#{HOSTNAME}:#{PORT}"
  end

def process_running?(pid)
  !!Process.kill(0, pid)
rescue Errno::ESRCH
  false
end

command =
  if ARGV.include?("--test")
    "test"
  elsif ARGV.include?("--build")
    "build"
  else
    "server"
  end

class String
  def cyan
    "\e[36m#{self}\e[0m"
  end

  def red
    "\033[31m#{self}\e[0m"
  end
end

if ARGV.include?("-h") || ARGV.include?("--help")
  puts "ember-cli OPTIONS"
  puts "#{"--try".cyan} To proxy try.discourse.org"
  puts "#{"--test".cyan} To run the test suite"
  puts "#{"--unicorn, -u".cyan} To run a unicorn server as well"
  puts "The rest of the arguments are passed to ember server per:", ""
  exec "yarn -s --cwd #{YARN_DIR} run ember #{command} --help"
end

args = ["-s", "--cwd", YARN_DIR, "run", "ember", command] + (ARGV - CUSTOM_ARGS)

if !args.include?("test") && !args.include?("build") && !args.include?("--proxy")
  args << "--proxy"
  args << PROXY
end

if !["3", "5", nil].include?(ENV["EMBER_VERSION"])
  raise "Unknown ember version #{ENV["EMBER_VERSION"]}"
end

system(
  "script/switch_ember_version",
  ENV["EMBER_VERSION"] || "5",
  exception: true,
  chdir: RAILS_ROOT,
)

# Running yarn install in the root directory will also run it for YARN_DIR via a post-install hook
exit 1 if !system "yarn", "-s", "install", "--cwd", RAILS_ROOT

yarn_env = {}
if ARGV.include?("--forward-host")
  yarn_env["FORWARD_HOST"] = "true"
end

if ARGV.include?("-u") || ARGV.include?("--unicorn")
  unicorn_env = { "DISCOURSE_PORT" => ENV["DISCOURSE_PORT"] || "4200" }
  unicorn_pid = spawn(unicorn_env, __dir__ + "/unicorn")
  ember_cli_pid = nil

  Thread.new do
    require 'open3'
    Open3.popen2e(yarn_env, "yarn", *args.to_a.flatten) do |i, oe, t|
      ember_cli_pid = t.pid
      puts "Ember CLI running on PID: #{ember_cli_pid}"
      oe.each do |line|
        if line.include?("\e[32m200\e") || line.include?("\e[36m304\e[0m") || line.include?("POST /message-bus")
          # skip 200s and 304s and message bus
        else
          puts line
        end
      end
    end
    if process_running?(unicorn_pid)
      puts "[bin/ember-cli] ember-cli process stopped. Terminating unicorn."
      Process.kill("TERM", unicorn_pid)
    end
  end

  trap("SIGINT") do
    # we got to swallow sigint to give time for
    # children to handle it
  end

  Process.wait(unicorn_pid)

  if ember_cli_pid && process_running?(ember_cli_pid)
    puts "[bin/ember-cli] unicorn process stopped. Terminating ember-cli."
    Process.kill("TERM", ember_cli_pid)
  end
else
  exec(yarn_env, "yarn", *args.to_a.flatten)
end