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# Copyright (c) 2016-present WeWantToKnow AS
#
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require "bundler/gem_tasks"
require "rspec/core/rake_task"
require 'rubocop/rake_task'
require 'u3d'
UI = U3dCore::UI

# doesn't yet support dot file
# https://github.com/skywinder/github-changelog-generator/issues/473
# require 'github_changelog_generator/task'

RSpec::Core::RakeTask.new(:spec)
RuboCop::RakeTask.new

class GithubChangelogGenerator
  PATH = '.github_changelog_generator'.freeze
  class << self
    def future_release
      s = File.read(PATH)
      s.split("\n").each do |line|
        m = line.match(/future-release=v(.*)/)
        return m[1] if m
      end
      raise "Couldn't find future-release in #{PATH}"
    end

    def future_release=(nextv)
      s = File.read(PATH)
      lines = s.split("\n").map do |line|
        m = line.match(/future-release=v(.*)/)
        if m
          "future-release=v#{nextv}"
        else
          line
        end
      end
      File.write(PATH, lines.join("\n") + "\n")
    end
  end
end

class U3dCode
  PATH = 'lib/u3d/version.rb'.freeze
  class << self
    def version=(version)
      s = File.read(PATH)
      lines = s.split("\n").map do |line|
        m = line.match(/(.*VERSION = ').*('.freeze.*)/)
        if m
          "#{m[1]}#{version}#{m[2]}"
        else
          line
        end
      end
      File.write(PATH, lines.join("\n") + "\n")
    end
  end
end

def run_command(command, error_message = nil)
  output = `#{command}`
  unless $CHILD_STATUS.success?
    error_message = "Failed to run command '#{command}'" if error_message.nil?
    UI.user_error!(error_message)
  end
  output
end

task :ensure_git_clean do
  branch = run_command('git rev-parse --abbrev-ref HEAD', "Couldn't get current git branch").strip
  UI.user_error!("You are not on 'master' but on '#{branch}'") unless branch == "master"
  output = run_command('git status --porcelain', "Couldn't get git status")
  UI.user_error!("git status not clean:\n#{output}") unless output == ""
end

# ensure ready to prepare a PR
task :prepare_git_pr, [:pr_branch] do |_t, args|
  pr_branch = args['pr_branch']
  raise "Missing pr_branch argument" unless pr_branch
  UI.user_error! "Prepare git PR stopped by user" unless UI.confirm("Creating PR branch #{pr_branch}")
  run_command("git checkout -b #{pr_branch}")
end

task pre_release: 'ensure_git_clean' do
  require 'u3d/version'
  nextversion = U3d::VERSION

  # check not already released
  output = run_command("git tag -l v#{nextversion}").strip
  UI.user_error! "Version '#{nextversion}' already released. Run 'rake bump'" unless output == ''

  gh_future_release = GithubChangelogGenerator.future_release
  UI.user_error! "GithubChangelogGenerator version #{gh_future_release} != #{nextversion}" unless gh_future_release == nextversion

  pr_branch = "release_#{nextversion}"
  Rake::Task["prepare_git_pr"].invoke(pr_branch)

  Rake::Task["changelog"].invoke

  sh('git diff')
  # FIXME: cleanup branch, etc
  UI.user_error! "Pre release stopped by user." unless UI.confirm("CHANGELOG PR for version #{nextversion}. Confirm?")

  msg = "Preparing release for #{nextversion}"
  sh 'git add CHANGELOG.md'
  sh "git commit -m '#{msg}'"
  sh "git push lacostej" # FIXME: hardcoded
  # FIXME: check hub present
  sh "hub pull-request -m '#{msg}'" # requires hub pre-release " -l nochangelog"
  sh 'git checkout master'
  sh "git branch -D #{pr_branch}"
end

task bump: 'ensure_git_clean' do
  nextversion = UI.input "Next version will be:"
  UI.user_error! "Bump version stopped by user" unless UI.confirm("Next version will be #{nextversion}. Confirm?")
  U3dCode.version = nextversion
  GithubChangelogGenerator.future_release = nextversion
  sh 'rspec'
  sh 'git add .github_changelog_generator lib/u3d/version.rb Gemfile.lock'
  sh "git commit -m 'Bump version to #{nextversion}'"
  sh 'git push'
end

task :changelog do
  puts "Updating changelog #{ENV['CHANGELOG_GITHUB_TOKEN']}"
  sh "github_changelog_generator" if ENV['CHANGELOG_GITHUB_TOKEN']
end

task :test_all do
  formatter = "--format progress"
  if ENV["CIRCLECI"]
    Dir.mkdir("/tmp/rspec/")
    formatter += " -r rspec_junit_formatter --format RspecJunitFormatter -o /tmp/rspec/rspec.xml"
    TEST_FILES = `(circleci tests glob "spec/**/*_spec.rb" | circleci tests split --split-by=timings)`.tr!("\n", ' ')
    rspec_args = "#{formatter} #{TEST_FILES}"
  else
    formatter += ' --pattern "./spec/**/*_spec.rb"'
    rspec_args = formatter
  end
  sh "rspec #{rspec_args}"
end

task default: %i[rubocop test_all]