# encoding: utf-8
$:.push File.expand_path("../lib", __FILE__)
$:.push File.expand_path("../tasks", __FILE__)

require 'bundler'
require 'bundler/setup'
require 'thor'
require 'berkshelf-api'
require 'build_gem'
require 'octokit'

class Default < Thor
  include Thor::Actions
  namespace "build"
  default_task :all

  GITHUB_ORG_REGEX = /(git\@github.com\:|https\:\/\/github.com\/)(.+).git/.freeze
  PKG_DIR          = File.expand_path("../pkg", __FILE__).freeze
  VENDOR_DIR       = File.expand_path("../vendor", __FILE__).freeze
  PROJECT_DIR      = File.dirname(__FILE__)

  desc "all", "clean, package, and release to Github"
  def all
    clean
    package
    release
  end

  desc "clean", "clean the packaging directory"
  def clean
    say "cleaning..."
    [ PKG_DIR, VENDOR_DIR ].each do |dir|
      FileUtils.rm_rf(dir)
      FileUtils.mkdir_p(dir)
    end
  end

  desc "package", "package the software for release"
  def package
    say "packaging..."
    empty_directory PKG_DIR
    invoke "gem:build"
    inside(File.dirname(__FILE__)) do
      run "bundle package --all"
      files = `git ls-files | grep -v spec`.split("\n")
      run("tar -czf #{archive_out} #{files.join(' ')} vendor")
    end
  end

  method_option :github_token,
    type: :string,
    default: ENV["GITHUB_TOKEN"],
    required: true,
    aliases: "-t",
    banner: "TOKEN"
  desc "release", "release the packaged software to Github"
  def release
    say "releasing..."
    invoke "gem:release"

    begin
      release = github_client.create_release(repository, version)
    rescue Octokit::UnprocessableEntity
      release = github_client.releases(repository).find { |release| release[:tag_name] == version }
    end

    say "Uploading #{File.basename(archive_out)} to Github..."
    github_client.upload_asset(release[:url], archive_out, name: "berkshelf-api.tar.gz",
      content_type: "application/x-tar")
  end

  private

    def archive_out
      File.join(PKG_DIR, "berkshelf-api-#{version}.tar.gz")
    end

    def github_client
      @github_client ||= Octokit::Client.new(access_token: options[:github_token])
    end

    def repository
      @repository ||= extract_repository
    end

    def extract_repository
      _, repository = `git remote show origin | grep Push`.scan(GITHUB_ORG_REGEX).first
      repository
    end

    def version
      @version ||= `git describe`.chomp
    end
end