class TurboTests::CLI

def initialize(argv)
  @argv = argv
end

def run
  requires = []
  formatters = []
  tags = []
  count = nil
  verbose = false
  fail_fast = nil
  OptionParser.new { |opts|
    opts.banner = <<-BANNER.gsub(/^          /, "")
      Run all tests in parallel, giving each process ENV['TEST_ENV_NUMBER'] ('1', '2', '3', ...).
      Uses parallel_tests under the hood, but reports test results incrementally. Based on Discourse and RubyGems work in this area.
      Usage: turbo_tests [options]
      [optional] Only selected files & folders:
        turbo_tests spec/bar spec/baz/xxx_spec.rb
      Options:
    BANNER
    opts.on("-n [PROCESSES]", Integer, "How many processes to use, default: available CPUs") { |n| count = n }
    opts.on("-r", "--require PATH", "Require a file.") do |filename|
      requires << filename
    end
    opts.on("-f", "--format FORMATTER", "Choose a formatter. Available formatters: progress (p), documentation (d). Default: progress") do |name|
      formatters << {
        name: name,
        outputs: []
      }
    end
    opts.on("-t", "--tag TAG", "Run examples with the specified tag.") do |tag|
      tags << tag
    end
    opts.on("-o", "--out FILE", "Write output to a file instead of $stdout") do |filename|
      if formatters.empty?
        formatters << {
          name: "progress",
          outputs: []
        }
      end
      formatters.last[:outputs] << filename
    end
    opts.on("-v", "--verbose", "More output") do
      verbose = true
    end
    opts.on("--fail-fast=[N]") do |n|
      n = begin
        Integer(n)
      rescue
        nil
      end
      fail_fast = n.nil? || n < 1 ? 1 : n
    end
  }.parse!(@argv)
  requires.each { |f| require(f) }
  if formatters.empty?
    formatters << {
      name: "progress",
      outputs: []
    }
  end
  formatters.each do |formatter|
    if formatter[:outputs].empty?
      formatter[:outputs] << "-"
    end
  end
  success = TurboTests::Runner.run(
    formatters: formatters,
    tags: tags,
    files: @argv.empty? ? ["spec"] : @argv,
    verbose: verbose,
    fail_fast: fail_fast,
    count: count,
  )
  if success
    exit 0
  else
    exit 1
  end
end