module Minitest

def self.__run reporter, options
  suites = Runnable.runnables.reject { |s| s.runnable_methods.empty? }.shuffle
  parallel, serial = suites.partition { |s| s.test_order == :parallel }
  # If we run the parallel tests before the serial tests, the parallel tests
  # could run in parallel with the serial tests. This would be bad because
  # the serial tests won't lock around Reporter#record. Run the serial tests
  # first, so that after they complete, the parallel tests will lock when
  # recording results.
  serial.map { |suite| suite.run reporter, options } +
    parallel.map { |suite| suite.run reporter, options }
end

def self.after_run &block
  @@after_run << block
end

def self.autorun
  at_exit {
    next if $! and not ($!.kind_of? SystemExit and $!.success?)
    exit_code = nil
    pid = Process.pid
    at_exit {
      next if Process.pid != pid
      @@after_run.reverse_each(&:call)
      exit exit_code || false
    }
    exit_code = Minitest.run ARGV
  } unless @@installed_at_exit
  @@installed_at_exit = true
end

def self.clock_time
  Process.clock_gettime Process::CLOCK_MONOTONIC
end

def self.clock_time
  Time.now
end

def self.filter_backtrace bt # :nodoc:
  result = backtrace_filter.filter bt
  result = bt.dup if result.empty?
  result
end

def self.init_plugins options # :nodoc:
  self.extensions.each do |name|
    msg = "plugin_#{name}_init"
    send msg, options if self.respond_to? msg
  end
end

def self.load_plugins # :nodoc:
  return unless self.extensions.empty?
  seen = {}
  require "rubygems" unless defined? Gem
  Gem.find_files("minitest/*_plugin.rb").each do |plugin_path|
    name = File.basename plugin_path, "_plugin.rb"
    next if seen[name]
    seen[name] = true
    require plugin_path
    self.extensions << name
  end
end

def self.plugin_pride_init options # :nodoc:
  if PrideIO.pride? then
    klass = ENV["TERM"] =~ /^xterm|-256color$/ ? PrideLOL : PrideIO
    io    = klass.new options[:io]
    self.reporter.reporters.grep(Minitest::Reporter).each do |rep|
      rep.io = io if rep.io.tty?
    end
  end
end

def self.plugin_pride_options opts, _options # :nodoc:
  opts.on "-p", "--pride", "Pride. Show your testing pride!" do
    PrideIO.pride!
  end
end

def self.process_args args = [] # :nodoc:
  options = {
             :io => $stdout,
            }
  orig_args = args.dup
  OptionParser.new do |opts|
    opts.banner  = "minitest options:"
    opts.version = Minitest::VERSION
    opts.on "-h", "--help", "Display this help." do
      puts opts
      exit
    end
    opts.on "--no-plugins", "Bypass minitest plugin auto-loading (or set $MT_NO_PLUGINS)."
    desc = "Sets random seed. Also via env. Eg: SEED=n rake"
    opts.on "-s", "--seed SEED", Integer, desc do |m|
      options[:seed] = m.to_i
    end
    opts.on "-v", "--verbose", "Verbose. Show progress processing files." do
      options[:verbose] = true
    end
    opts.on "-n", "--name PATTERN", "Filter run on /regexp/ or string." do |a|
      options[:filter] = a
    end
    opts.on "-e", "--exclude PATTERN", "Exclude /regexp/ or string from run." do |a|
      options[:exclude] = a
    end
    unless extensions.empty?
      opts.separator ""
      opts.separator "Known extensions: #{extensions.join(", ")}"
      extensions.each do |meth|
        msg = "plugin_#{meth}_options"
        send msg, opts, options if self.respond_to?(msg)
      end
    end
    begin
      opts.parse! args
    rescue OptionParser::InvalidOption => e
      puts
      puts e
      puts
      puts opts
      exit 1
    end
    orig_args -= args
  end
  unless options[:seed] then
    srand
    options[:seed] = (ENV["SEED"] || srand).to_i % 0xFFFF
    orig_args << "--seed" << options[:seed].to_s
  end
  srand options[:seed]
  options[:args] = orig_args.map { |s|
    s =~ /[\s|&<>$()]/ ? s.inspect : s
  }.join " "
  options
end

def self.run args = []
  self.load_plugins unless args.delete("--no-plugins") || ENV["MT_NO_PLUGINS"]
  options = process_args args
  reporter = CompositeReporter.new
  reporter << SummaryReporter.new(options[:io], options)
  reporter << ProgressReporter.new(options[:io], options)
  self.reporter = reporter # this makes it available to plugins
  self.init_plugins options
  self.reporter = nil # runnables shouldn't depend on the reporter, ever
  self.parallel_executor.start if parallel_executor.respond_to?(:start)
  reporter.start
  begin
    __run reporter, options
  rescue Interrupt
    warn "Interrupted. Exiting..."
  end
  self.parallel_executor.shutdown
  reporter.report
  reporter.passed?
end

def self.run_one_method klass, method_name # :nodoc:
  result = klass.new(method_name).run
  raise "#{klass}#run _must_ return a Result" unless Result === result
  result
end