#!/usr/bin/env ruby -wU

#*******************************************************************************
#
# CONFIGURATION OPTIONS
#
#*******************************************************************************

CONFIG_KEYS = [:REPOSITORY_PATH, :STARTED_ISSUES_FILE].freeze

REPOSITORY_PATH = ENV.fetch('REPOSITORY_PATH') { File.expand_path(File.join(File.dirname(__FILE__), '../')) }

STARTED_ISSUES_FILE = ENV.fetch('STARTED_ISSUES_FILE', '.started-issues')

#*******************************************************************************
#
# HELP OPTIONS
#
#*******************************************************************************

if ARGV.grep(/-h/i).size == 1
  $stdout.puts ""
  $stdout.puts "$ ./#{File.basename(__FILE__)} 123"
  $stdout.puts ""
  $stdout.puts "This script will close the current issue branch."
  $stdout.puts ""
  $stdout.puts "* Remove the started issue from the #{STARTED_ISSUES_FILE}"
  $stdout.puts "* Make a commit closing the issue"
  $stdout.puts ""
  $stdout.puts "Note: There are steps to insure you have a clean working directory."
  $stdout.puts "Note: If you have spaces in your configuration all bets are off!"
  $stdout.puts ""
  $stdout.puts "Current Configuration:"
  CONFIG_KEYS.each do |key|
    $stdout.puts "\t#{key}='#{Object.const_get(key)}'"
  end
  $stdout.puts ""
  $stdout.puts "You can override the configuration option by adding the corresponding"
  $stdout.puts "ENV variable."
  $stdout.puts ""
  $stdout.puts "Example:"
  $stdout.puts "$ REPOSITORY_PATH=.. ./scripts/#{File.basename(__FILE__)}"
  exit(0)
end

#*******************************************************************************
#
# GUARD
#
#*******************************************************************************

# Guard that directories exist
[:REPOSITORY_PATH].each do |key|
  repository_path = Object.const_get(key)
  unless File.directory?(repository_path)
    $stderr.puts "Expected directory for #{key} @ #{repository_path} to exist.\n\n"
    $stderr.puts "See help for details on specifying #{key}.\n\n"
    $stderr.puts "$ ./#{File.basename(__FILE__)} -h"
    exit!(1)
  end
end

# Guard that I know what the issue number is
current_branch = `cd #{REPOSITORY_PATH} && git branch | grep '^[*]'`.sub(/^\*\s*/, '').strip

issue_source = :unknown
if current_branch =~ /^(\w+-\d+)\D/  # jira issue
  ISSUE_NUMBER = $1
  issue_source = :jira
elsif current_branch =~ /^(\d+)\D/   # github issue
  ISSUE_NUMBER = $1
  issue_source = :github
else
  $stderr.puts "Expected to be able to determine issue number from branch #{current_branch} name @ #{REPOSITORY_PATH}.\n\n"
  $stderr.puts "See help for more information.\n\n"
  $stderr.puts "$ ./#{File.basename(__FILE__)} -h"
  exit!(2)
end

# Guard that we have a clean working directory
if `cd #{REPOSITORY_PATH} && git status --porcelain`.strip.size > 0
  $stderr.puts "Repository @ #{REPOSITORY_PATH} did not have a clean working directory"
  exit!(3)
end

# Guard that the tests all pass
unless system("cd #{REPOSITORY_PATH} && bundle exec rake")
  $stderr.puts "Your tests failed. Please review the above output."
  exit!(4)
end

#*******************************************************************************
#
# DO STUFF
#
#*******************************************************************************

started_issues_file_lines = File.read(File.join(REPOSITORY_PATH, STARTED_ISSUES_FILE)).split("\n")

File.open(STARTED_ISSUES_FILE, 'w+') do |file|
  started_issues_file_lines.each do |line|
    file.puts line unless line.strip.downcase == ISSUE_NUMBER.downcase
  end
end

`cd #{REPOSITORY_PATH}; git add #{STARTED_ISSUES_FILE}`

path_to_commit_message = File.expand_path(File.join(REPOSITORY_PATH, '../COMMIT.msg'))
begin
  File.open(path_to_commit_message, 'w+') do |file|
    file.puts "Closing issue #{ISSUE_NUMBER}"
    file.puts ""
    if issue_source == :github
      file.puts "Closes ##{ISSUE_NUMBER}"
      file.puts ""
    end

    message = "$ ./script/#{File.basename(__FILE__)} #{ISSUE_NUMBER}"
    CONFIG_KEYS.each_with_object(message) do |key, mem|
      if ENV.key?(key.to_s)
        mem = "#{key}=\"#{ENV[key.to_s].to_s}\" #{mem}"
      end
      mem
    end
    file.puts message
  end
  $stdout.puts `cd #{REPOSITORY_PATH} && git commit -F #{path_to_commit_message}`
ensure
  File.unlink(path_to_commit_message) rescue true
end

# update jira and mark this issue as finished
if issue_source == :jira
  system("jira transition qa #{ISSUE_NUMBER} --noedit")
  exit!(5) unless $?.success?
end