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

# TODO: Determine the utility of this file.

LIB_DIR = File.join(File.dirname(__FILE__), 'lib')
$LOAD_PATH << LIB_DIR
require 'sitediff/webserver'
require 'sitediff/webserver/resultserver'

# Thor Base class.
class Base < Thor
  method_options local: true
  # Adds the option to all Base subclasses.
  # method_options() takes different arguments than option().
  def initialize(*args)
    super(*args)
    @local = options['local']
  end

  # gives us run()
  include Thor::Actions

  # Thor, by default, exits with 0 no matter what!
  def self.exit_on_failure?
    true
  end

  protected

  def executable(gem)
    gem = './bin/sitediff' if (gem == 'sitediff') && @local
    "#{'bundle exec' if @local} #{gem}"
  end
end

# Thor for Docker.
class Docker < Base
  IMAGE = 'evolvingweb/sitediff'

  desc 'build', 'Build a docker image for sitediff'
  # Make a build image for docker.
  def build
    run "docker build -t #{IMAGE} . "
  end

  desc 'run', 'Run a rake task (or a login shell if none given) inside docker'
  # NOTE: We can't override run() (which is reserved by Thor). Luckily, Thor only
  # checks for the first N necessary characters to match a command with a
  # method. Cf. Thor::normalize_command_name()
  def run_(task = 'bash')
    docker_opts = ['-t', "-v #{File.dirname(__FILE__)}:/sitediff"]
    finish_exec(task, docker_opts)
  end

  desc 'compose', 'Run a task inside docker without volume mounting (not supported with compose)'
  # Run a task inside docker without volume mounting.
  def compose(task = 'bash')
    docker_opts = ['-t']
    finish_exec(task, docker_opts)
  end

  no_commands do
    # Finished exec
    def finish_exec(task, docker_opts)
      if task == 'bash'
        cmd = 'bash'
        docker_opts << '-i'
      else
        # pass down the local flag to docker command
        cmd = "#{executable('thor')} #{task} #{@local ? '--local' : '--no-local'}"
      end
      puts "docker run #{docker_opts.join(' ')} #{IMAGE} #{cmd}"
      run "docker run #{docker_opts.join(' ')} #{IMAGE} #{cmd}"
    end
  end
end

# Thor for Spec.
class Spec < Base
  desc 'unit', 'run RSpec unit tests'
  # Run RSpec unit tests.
  def unit
    puts "#{executable('rspec')} spec/unit"
    run "#{executable('rspec')} spec/unit"
  end

  desc 'fixture', 'run RSpec integration tests'
  # Run RSpec integration tests.
  def fixture
    puts "#{executable('rspec')} spec/unit"
    run "#{executable('rspec')} spec/fixtures"
  end

  desc 'all', 'runs both unit and fixture tests', hide: true
  # hidden task to lump together multiple tasks
  def all
    unit
    fixture
  end
  default_task :all
end

# Thor for fixtures.
class Fixture < Base
  desc 'local', 'Run a sitediff test case'
  # Run a sitediff test case.
  def local
    run "#{executable('sitediff')} diff --cached=none spec/fixtures/cli/config.yaml"
  end

  desc 'http', 'Run a sitediff test case, using web servers'
  # Run a sitediff test case, using web servers.
  def http
    cmd = "#{executable('sitediff')} diff --cached=none spec/fixtures/cli/config.yaml"
    http_fixtures(cmd).kill
  end

  desc 'serve', 'Serve the result of the fixture test'
  # Serve the result of the fixture test.
  def serve
    cmd = "#{executable('sitediff')} diff --cached=none --paths-file=spec/sites/ruby-doc.org/paths.txt spec/unit/cli/config.yaml"
    http_fixtures(cmd)
    SiteDiff::Webserver::ResultServer.new(nil, 'sitediff', quiet: true).wait
  end

  private

  # HTTP Fixtures.
  def http_fixtures(cmd)
    serv = SiteDiff::Webserver::FixtureServer.new
    run "#{cmd} --before #{serv.before} --after #{serv.after}"
    serv
  end
end