require 'puppet_litmus/rake_tasks' if Bundler.rubygems.find_name('puppet_litmus').any?
require 'puppetlabs_spec_helper/rake_tasks'
require 'puppet-syntax/tasks/puppet-syntax'
require 'puppet_blacksmith/rake_tasks' if Bundler.rubygems.find_name('puppet-blacksmith').any?
require 'github_changelog_generator/task' if Bundler.rubygems.find_name('github_changelog_generator').any?
require 'puppet-strings/tasks' if Bundler.rubygems.find_name('puppet-strings').any?

def changelog_user
  return unless Rake.application.top_level_tasks.include? "changelog"
  returnVal = nil || JSON.load(File.read('metadata.json'))['author']
  raise "unable to find the changelog_user in .sync.yml, or the author in metadata.json" if returnVal.nil?
  puts "GitHubChangelogGenerator user:#{returnVal}"
  returnVal
end

def changelog_project
  return unless Rake.application.top_level_tasks.include? "changelog"

  returnVal = nil
  returnVal ||= begin
    metadata_source = JSON.load(File.read('metadata.json'))['source']
    metadata_source_match = metadata_source && metadata_source.match(%r{.*\/([^\/]*?)(?:\.git)?\Z})

    metadata_source_match && metadata_source_match[1]
  end

  raise "unable to find the changelog_project in .sync.yml or calculate it from the source in metadata.json" if returnVal.nil?

  puts "GitHubChangelogGenerator project:#{returnVal}"
  returnVal
end

def changelog_future_release
  return unless Rake.application.top_level_tasks.include? "changelog"
  returnVal = "%s" % JSON.load(File.read('metadata.json'))['version']
  raise "unable to find the future_release (version) in metadata.json" if returnVal.nil?
  puts "GitHubChangelogGenerator future_release:#{returnVal}"
  returnVal
end

PuppetLint.configuration.send('disable_relative')

if Bundler.rubygems.find_name('github_changelog_generator').any?
  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
    raise "Set CHANGELOG_GITHUB_TOKEN environment variable eg 'export CHANGELOG_GITHUB_TOKEN=valid_token_here'" if Rake.application.top_level_tasks.include? "changelog" and ENV['CHANGELOG_GITHUB_TOKEN'].nil?
    config.user = "#{changelog_user}"
    config.project = "#{changelog_project}"
    config.future_release = "#{changelog_future_release}"
    config.exclude_labels = ['maintenance']
    config.header = "# Change log\n\nAll notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org)."
    config.add_pr_wo_labels = true
    config.issues = false
    config.merge_prefix = "### UNCATEGORIZED PRS; GO LABEL THEM"
    config.configure_sections = {
      "Changed" => {
        "prefix" => "### Changed",
        "labels" => ["backwards-incompatible"],
      },
      "Added" => {
        "prefix" => "### Added",
        "labels" => ["feature", "enhancement"],
      },
      "Fixed" => {
        "prefix" => "### Fixed",
        "labels" => ["bugfix"],
      },
    }
  end
else
  desc 'Generate a Changelog from GitHub'
  task :changelog do
    raise <<EOM
The changelog tasks depends on unreleased features of the github_changelog_generator gem.
Please manually add it to your .sync.yml for now, and run `pdk update`:
---
Gemfile:
  optional:
    ':development':
      - gem: 'github_changelog_generator'
        git: 'https://github.com/skywinder/github-changelog-generator'
        ref: '20ee04ba1234e9e83eb2ffb5056e23d641c7a018'
        condition: "Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('2.2.2')"
EOM
  end
end

desc "verify that commit messages match CONTRIBUTING.md requirements"
task(:commits) do
  # This rake task looks at the summary from every commit from this branch not
  # in the branch targeted for a PR.
  commit_range = 'HEAD^..HEAD'
  puts "Checking commits #{commit_range}"
  %x{git log --no-merges --pretty=%s #{commit_range}}.each_line do |commit_summary|
    # This regex tests for the currently supported commit summary tokens.
    # The exception tries to explain it in more full.
    if /^\((maint|packaging|doc|docs|modules-\d+)\)|revert/i.match(commit_summary).nil?
      raise "\n\n\n\tThis commit summary didn't match CONTRIBUTING.md guidelines:\n" \
        "\n\t\t#{commit_summary}\n" \
        "\tThe commit summary (i.e. the first line of the commit message) should start with one of:\n"  \
        "\t\t(MODULES-<digits>) # this is most common and should be a ticket at tickets.puppet.com\n" \
        "\t\t(docs)\n" \
        "\t\t(docs)(DOCUMENT-<digits>)\n" \
        "\t\t(packaging)\n"
        "\t\t(maint)\n" \
        "\n\tThis test for the commit summary is case-insensitive.\n\n\n"
    else
      puts "#{commit_summary}"
    end
    puts "...passed"
  end
end