# frozen_string_literal: true

$LOAD_PATH.unshift File.expand_path('lib', __dir__)
windows = RUBY_PLATFORM =~ /mswin|mingw/

require 'bundler/gem_tasks'

desc 'run specs'
task(:spec) { ruby "-S rspec spec#{' -c' unless windows}" }

desc 'generate gemspec, update readme'
task update: :completion do
  require 'travis/version'
  content = File.read('travis.gemspec')

  # fetch data
  fields = {
    authors: sort_by_commits_alpha(`git shortlog -sn`.b, /[^\d\s].*/).uniq,
    email: sort_by_commits_alpha(`git shortlog -sne`.b, /[^<]+@[^>]+/).uniq,
    files: `git ls-files`.b.split("\n").reject { |f| f =~ /^(\.|Gemfile)/ }
  }

  # :(
  fields[:email].delete('konstantin.haase@gmail.com')

  # insert data
  fields.each do |field, values|
    updated = "  s.#{field} = ["
    updated << values.map { |v| "\n    %p" % v }.join(',')
    updated << "\n  ]"
    content.sub!(/  s\.#{field} = \[\n(    .*\n)*  \]/, updated)
  end

  # set version
  content.sub!(/(s\.version.*=\s+).*/, "\\1\"#{Travis::VERSION}\"")

  # escape unicode
  content.gsub!(/./) { |c| c.bytesize > 1 ? "\\u{#{c.codepoints.first.to_s(16)}}" : c }

  File.open('travis.gemspec', 'w') { |f| f << content }

  readme = File.read('README.md').b
  readme.gsub!(/^(\s+\$ travis version\n\s+).*$/, "\\1#{Travis::VERSION}")
  readme.gsub!(/(gem install travis -v )\S+/, "\\1#{Travis::VERSION}")
  readme.gsub!(/^\*\*#{Regexp.escape(Travis::VERSION)}\*\* \(not yet released?\)\n/i,
               "**#{Travis::VERSION}** (#{Time.now.strftime('%B %-d, %Y')})\n")

  Travis::CLI.commands.each do |c|
    readme.sub!(/^(        \* \[`#{c.command_name}`\]\(##{c.command_name}\)).*$/, "\\1 - #{c.description}")
  end

  File.write('README.md', readme)
end

task :completion do
  require 'travis/tools/completion'
  Travis::Tools::Completion.compile
end

task 'travis.gemspec' => :update
task 'README.md'      => :update

task gemspec: :update
task default: :spec
task default: :gemspec unless windows || (RUBY_VERSION < '2.0')
task test: :spec

def sort_by_commits_alpha(shortlog_output, patt)
  shortlog_output.split("\n").sort do |a, b|
    a_comm, a_name = a.strip.split(/\t/)
    b_comm, b_name = b.strip.split(/\t/)

    if a_comm.to_i != b_comm.to_i
      a_comm.to_i <=> b_comm.to_i
    else
      b_name <=> a_name # we will reserve this sort afterwards, so we need the opposite order here
    end
  end.join("\n").scan(patt).reverse
end