# frozen_string_literal: true

require 'rake/clean'
require 'minitest/test_task'
require 'fileutils'
require 'date'

task default: :test

def source_version
  @source_version ||= File.read(File.expand_path('VERSION', __dir__)).strip
end

def prev_feature
  source_version.gsub(/^(\d\.)(\d+)\..*$/) { $1 + ($2.to_i - 1).to_s }
end

def prev_version
  return "#{prev_feature}.0" if source_version.end_with? '.0'

  source_version.gsub(/\d+$/) { |s| s.to_i - 1 }
end

# Tests ===============================================================

Minitest::TestTask.create # Default `test` task
Minitest::TestTask.create(:'test:core') do |t|
  t.warning = true
  t.test_globs = %w[
    base delegator encoding extensions filter
    helpers mapped_error middleware rdoc
    readme request response result route_added_hook
    routing server settings sinatra static templates
  ].map { |n| "test/#{n}_test.rb" }
end

# Test code coverage ==================================================

namespace :test do
  desc 'Measures test coverage'
  task :coverage do
    rm_f 'coverage'
    ENV['COVERAGE'] = '1'
    Rake::Task['test'].invoke
  end
end
CLEAN.include('coverage')

# Website =============================================================

desc 'Generate RDoc under doc/api'
task 'doc' => ['doc:api']
task('doc:api') { sh 'yardoc -o doc/api' }
CLEAN.include 'doc/api'

# README ===============================================================

task :add_template, [:name] do |_t, args|
  Dir.glob('README.*') do |file|
    code = File.read(file)
    if code =~ /^===.*#{args.name.capitalize}/
      puts "Already covered in #{file}"
    else
      template = code[%r{===[^\n]*Liquid.*index\.liquid</tt>[^\n]*}m]
      if template
        puts "Adding section to #{file}"
        template = template.gsub(/Liquid/, args.name.capitalize).gsub(/liquid/, args.name.downcase)
        code.gsub! /^(\s*===.*CoffeeScript)/, "\n" << template << "\n\\1"
        File.open(file, 'w') { |f| f << code }
      else
        puts "Liquid not found in #{file}"
      end
    end
  end
end

# Thanks in announcement ===============================================

team = ['Ryan Tomayko', 'Blake Mizerany', 'Simon Rozet', 'Konstantin Haase', 'Zachary Scott']
desc 'list of contributors'
task :thanks, ['release:all', :backports] do |_t, a|
  a.with_defaults release: "#{prev_version}..HEAD",
                  backports: "#{prev_feature}.0..#{prev_feature}.x"

  included = `git log --format=format:"%aN\t%s" #{a.release}`.lines.map { |l| l.force_encoding('binary') }
  excluded = `git log --format=format:"%aN\t%s" #{a.backports}`.lines.map { |l| l.force_encoding('binary') }
  commits  = (included - excluded).group_by { |c| c[/^[^\t]+/] }
  authors  = commits.keys.sort_by { |n| - commits[n].size } - team
  puts authors[0..-2].join(', ') << ' and ' << authors.last,
       "(based on commits included in #{a.release}, but not in #{a.backports})"
end

desc 'list of authors'
task :authors, [:commit_range, :format, :sep] do |_t, a|
  a.with_defaults format: '%s (%d)', sep: ', ', commit_range: '--all'
  authors = Hash.new(0)
  blake   = 'Blake Mizerany'
  overall = 0
  mapping = {
    'blake.mizerany@gmail.com' => blake, 'bmizerany' => blake,
    'a_user@mac.com' => blake, 'ichverstehe' => 'Harry Vangberg',
    'Wu Jiang (nouse)' => 'Wu Jiang'
  }
  `git shortlog -s #{a.commit_range}`.lines.map do |line|
    line = line.force_encoding 'binary' if line.respond_to? :force_encoding
    num, name = line.split("\t", 2).map(&:strip)
    authors[mapping[name] || name] += num.to_i
    overall += num.to_i
  end
  puts "#{overall} commits by #{authors.count} authors:"
  puts authors.sort_by { |_n, c| -c }.map { |e| a.format % e }.join(a.sep)
end

desc 'generates TOC'
task :toc, [:readme] do |_t, a|
  a.with_defaults readme: 'README.md'

  def self.link(title)
    title.downcase.gsub(/(?!-)\W /, '-').gsub(' ', '-').gsub(/(?!-)\W/, '')
  end

  puts '* [Sinatra](#sinatra)'
  title = Regexp.new('(?<=\* )(.*)') # so Ruby 1.8 doesn't complain
  File.binread(a.readme).scan(/^##.*/) do |line|
    puts line.gsub(/#(?=#)/, '    ').gsub('#', '*').gsub(title) { "[#{$1}](##{link($1)})" }
  end
end

# PACKAGING ============================================================

if defined?(Gem)
  GEMS_AND_ROOT_DIRECTORIES = {
    'sinatra' => '.',
    'sinatra-contrib' => './sinatra-contrib',
    'rack-protection' => './rack-protection'
  }.freeze

  def package(gem, ext = '')
    "pkg/#{gem}-#{source_version}" + ext
  end

  directory 'pkg/'
  CLOBBER.include('pkg')

  GEMS_AND_ROOT_DIRECTORIES.each do |gem, directory|
    file package(gem, '.gem') => ['pkg/', "#{"#{directory}/#{gem}"}.gemspec"] do |f|
      sh "cd #{directory} && gem build #{gem}.gemspec"
      mv "#{directory}/#{File.basename(f.name)}", f.name
    end

    file package(gem, '.tar.gz') => ['pkg/'] do |f|
      sh <<-SH
        git archive \
          --prefix=#{gem}-#{source_version}/ \
          --format=tar \
          HEAD -- #{directory} | gzip > #{f.name}
      SH
    end
  end

  namespace :package do
    GEMS_AND_ROOT_DIRECTORIES.each do |gem, _directory|
      desc "Build #{gem} packages"
      task gem => %w[.gem .tar.gz].map { |e| package(gem, e) }
    end

    desc 'Build all packages'
    task all: GEMS_AND_ROOT_DIRECTORIES.keys
  end

  namespace :install do
    GEMS_AND_ROOT_DIRECTORIES.each do |gem, _directory|
      desc "Build and install #{gem} as local gem"
      task gem => package(gem, '.gem') do
        sh "gem install #{package(gem, '.gem')}"
      end
    end

    desc 'Build and install all of the gems as local gems'
    task all: GEMS_AND_ROOT_DIRECTORIES.keys
  end

  namespace :release do
    GEMS_AND_ROOT_DIRECTORIES.each do |gem, _directory|
      desc "Release #{gem} as a package"
      task gem => "package:#{gem}" do
        sh <<-SH
          gem install #{package(gem, '.gem')} --local &&
          gem push #{package(gem, '.gem')}
        SH
      end
    end

    desc 'Commits the version to github repository'
    task :commit_version do
      %w[
        lib/sinatra
        sinatra-contrib/lib/sinatra/contrib
        rack-protection/lib/rack/protection
      ].each do |path|
        path = File.join(path, 'version.rb')
        File.write(path, File.read(path).sub(/VERSION = '(.+?)'/, "VERSION = '#{source_version}'"))
      end

      sh <<-SH
        git commit --allow-empty -a -m '#{source_version} release'  &&
        git tag -s v#{source_version} -m '#{source_version} release'  &&
        git push && (git push origin || true) &&
        git push --tags && (git push origin --tags || true)
      SH
    end

    desc 'Release all gems as packages'
    task all: %i[test commit_version] + GEMS_AND_ROOT_DIRECTORIES.keys
  end
end