require 'bundler/setup'
require 'date'
require 'rubygems'
require 'rdoc/task'
require 'rubygems/package_task'
require File.dirname(__FILE__) + '/lib/fog'

#############################################################################
#
# Helper functions
#
#############################################################################

def name
  @name ||= Dir['*.gemspec'].first.split('.').first
end

def version
  line = File.read("lib/#{name}.rb")[/^\s*VERSION\s*=\s*.*/]
  line.match(/.*VERSION\s*=\s*['"](.*)['"]/)[1]
end

def date
  Date.today.to_s
end

def rubyforge_project
  name
end

def gemspec_file
  "#{name}.gemspec"
end

def gem_file
  "#{name}-#{version}.gem"
end

def replace_header(head, header_name)
  head.sub!(/(\.#{header_name}\s*= ').*'/) { "#{$1}#{send(header_name)}'"}
end

#############################################################################
#
# Standard tasks
#
#############################################################################

GEM_NAME = "#{name}"
task :default => :test

namespace :test do
  task :dynect do
    [false].each do |mock|
      sh("export FOG_MOCK=#{mock} && bundle exec shindont tests/dns/requests/dynect")
      #sh("export FOG_MOCK=#{mock} && bundle exec shindont tests/dns/models/")
    end
  end
end

task :test do
  Rake::Task[:mock_tests].invoke
end

def tests(mocked)
  Formatador.display_line
  start = Time.now.to_i
  threads = []
  Thread.main[:results] = []
  Fog.providers.each do |key, value|
    threads << Thread.new do
      Thread.main[:results] << {
        :provider => value,
        :success  => sh("export FOG_MOCK=#{mocked} && bundle exec shindont +#{key}")
      }
    end
  end
  threads.each do |thread|
    thread.join
  end
  Formatador.display_table(Thread.main[:results].sort {|x,y| x[:provider] <=> y[:provider]})
  Formatador.display_line("[bold]FOG_MOCK=#{mocked}[/] tests completed in [bold]#{Time.now.to_i - start}[/] seconds")
  Formatador.display_line
end

task :mock_tests do
  tests(true)
end

task :real_tests do
  tests(false)
end

task :nuke do
  Fog.providers.each do |provider|
    next if ['Vmfusion'].include?(provider)
    begin
      compute = Fog::Compute.new(:provider => provider)
      for server in compute.servers
        Formatador.display_line("[#{provider}] destroying server #{server.identity}")
        server.destroy rescue nil
      end
    rescue
    end
    begin
      dns = Fog::DNS.new(:provider => provider)
      for zone in dns.zones
        for record in zone.records
          record.destroy rescue nil
        end
        Formatador.display_line("[#{provider}] destroying zone #{zone.identity}")
        zone.destroy rescue nil
      end
    rescue
    end
  end
end

require 'rdoc/task'
RDoc::Task.new do |rdoc|
  rdoc.rdoc_dir = 'rdoc'
  rdoc.title = "#{name} #{version}"
  rdoc.rdoc_files.include('README*')
  rdoc.rdoc_files.include('lib/**/*.rb')
end

desc "Open an irb session preloaded with this library"
task :console do
  sh "irb -rubygems -r ./lib/#{name}.rb"
end

#############################################################################
#
# Packaging tasks
#
#############################################################################

task :release => :build do
  unless `git branch` =~ /^\* master$/
    puts "You must be on the master branch to release!"
    exit!
  end
  sh "gem install pkg/#{name}-#{version}.gem"
  sh "git commit --allow-empty -a -m 'Release #{version}'"
  sh "git tag v#{version}"
  sh "git push origin master"
  sh "git push origin v#{version}"
  sh "gem push pkg/#{name}-#{version}.gem"
  Rake::Task[:docs].invoke
end

task :build => :gemspec do
  sh "mkdir -p pkg"
  sh "gem build #{gemspec_file}"
  sh "mv #{gem_file} pkg"
end

task :gemspec => :validate do
  # read spec file and split out manifest section
  spec = File.read(gemspec_file)

  # replace name version and date
  replace_header(spec, :name)
  replace_header(spec, :version)
  replace_header(spec, :date)
  #comment this out if your rubyforge_project has a different name
  replace_header(spec, :rubyforge_project)

  File.open(gemspec_file, 'w') { |io| io.write(spec) }
  puts "Updated #{gemspec_file}"
end

task :validate do
  libfiles = Dir['lib/*'] - ["lib/#{name}.rb", "lib/#{name}"]
  unless libfiles.empty?
    puts "Directory `lib` should only contain a `#{name}.rb` file and `#{name}` dir."
    exit!
  end
  unless Dir['VERSION*'].empty?
    puts "A `VERSION` file at root level violates Gem best practices."
    exit!
  end
end

task :changelog do
  timestamp = Time.now.utc.strftime('%m/%d/%Y')
  sha = `git log | head -1`.split(' ').last
  changelog = ["#{version} #{timestamp} #{sha}"]
  changelog << ('=' * changelog[0].length)
  changelog << ''

  require 'multi_json'
  github_repo_data = Fog::JSON.decode(Excon.get('https://api.github.com/repos/fog/fog').body)
  data = github_repo_data.reject {|key, value| !['forks', 'open_issues', 'watchers'].include?(key)}
  github_collaborator_data = Fog::JSON.decode(Excon.get('https://api.github.com/repos/fog/fog/collaborators').body)
  data['collaborators'] = github_collaborator_data.length
  rubygems_data = Fog::JSON.decode(Excon.get('https://rubygems.org/api/v1/gems/fog.json').body)
  data['downloads'] = rubygems_data['downloads']
  stats = []
  for key in data.keys.sort
    stats << "'#{key}' => #{data[key]}"
  end
  changelog << "Stats! { #{stats.join(', ')} }"
  changelog << ''

  last_sha = `cat changelog.txt | head -1`.split(' ').last
  shortlog = `git shortlog #{last_sha}..HEAD`
  changes = {}
  committers = {}
  for line in shortlog.split("\n")
    if line =~ /^\S/
      committer = line.split(' (', 2).first
      committers[committer] = 0
    elsif line =~ /^\s*((Merge.*)|(Release.*))?$/
      # skip empty lines, Merge and Release commits
    else
      unless line[-1..-1] == '.'
        line << '.'
      end
      line.lstrip!
      line.gsub!(/^\[([^\]]*)\] /, '')
      tag = $1 || 'misc'
      changes[tag] ||= []
      changes[tag] << (line << ' thanks ' << committer)
      committers[committer] += 1
    end
  end

  for committer, commits in committers.to_a.sort {|x,y| y[1] <=> x[1]}
    if [
        'Aaron Suggs',
        'Brian Hartsock',
        'Christopher Oliver',
        'Decklin Foster',
        'Dylan Egan',
        'geemus',
        'Henry Addison',
        'Kevin Menard',
        'Lincoln Stoll',
        'Luqman Amjad',
        'Michael Zeng',
        'Nick Osborn',
        'nightshade427',
        'Patrick Debois',
        'Stepan G. Fedorov',
        'Wesley Beary'
      ].include?(committer)
      next
    end
    changelog << "MVP! #{committer}"
    changelog << ''
    break
  end

  for tag in changes.keys.sort
    changelog << ('[' << tag << ']')
    for commit in changes[tag]
      changelog << ('  ' << commit)
    end
    changelog << ''
  end

  old_changelog = File.read('changelog.txt')
  File.open('changelog.txt', 'w') do |file|
    file.write(changelog.join("\n"))
    file.write("\n\n")
    file.write(old_changelog)
  end
end

task :docs do
  Rake::Task[:supported_services_docs].invoke
  Rake::Task[:upload_fog_io].invoke
  Rake::Task[:upload_rdoc].invoke

  # connect to storage provider
  Fog.credential = :geemus
  storage = Fog::Storage.new(:provider => 'AWS')
  directory = storage.directories.new(:key => 'fog.io')
  # write base index with redirect to new version
  directory.files.create(
    :body         => redirecter('latest'),
    :content_type => 'text/html',
    :key          => 'index.html',
    :public       => true
  )

  Formatador.display_line
end

task :supported_services_docs do
  support, shared = {}, []
  for key, values in Fog.services
    unless values.length == 1
      shared |= [key]
      values.each do |value|
        support[value] ||= {}
        support[value][key] = '+'
      end
    else
      value = values.first
      support[value] ||= {}
      support[value][:other] ||= []
      support[value][:other] << key
    end
  end
  shared.sort! {|x,y| x.to_s <=> y.to_s}
  columns = [:provider] + shared + [:other]
  data = []
  for key in support.keys.sort {|x,y| x.to_s <=> y.to_s}
    data << { :provider => key }.merge!(support[key])
  end

  table = ''
  table << "<table border='1'>\n"

  table << "  <tr>"
  for column in columns
    table << "<th>#{column}</th>"
  end
  table << "</tr>\n"

  for datum in data
    table << "  <tr>"
    for column in columns
      if value = datum[column]
        case value
        when Array
          table << "<td>#{value.join(', ')}</td>"
        when '+'
          table << "<td style='text-align: center;'>#{value}</td>"
        else
          table << "<th>#{value}</th>"
        end
      else
        table << "<td></td>"
      end
    end
    table << "</tr>\n"
  end

  table << "</table>\n"

  File.open('docs/about/supported_services.markdown', 'w') do |file|
    file.puts <<-METADATA
---
layout: default
title:  Supported Services
---

METADATA
    file.puts(table)
  end
end

task :upload_fog_io do
  # connect to storage provider
  Fog.credential = :geemus
  storage = Fog::Storage.new(:provider => 'AWS')
  directory = storage.directories.new(:key => 'fog.io')

  # build the docs locally
  sh "jekyll docs docs/_site"

  # write web page files to versioned 'folder'
  for file_path in Dir.glob('docs/_site/**/*')
    next if File.directory?(file_path)
    file_name = file_path.gsub('docs/_site/', '')
    key = '' << version << '/' << file_name
    Formatador.redisplay(' ' * 128)
    Formatador.redisplay("Uploading [bold]#{key}[/]")
    if File.extname(file_name) == '.html'
      # rewrite links with version
      body = File.read(file_path)
      body.gsub!(/vX.Y.Z/, 'v' << version)
      body.gsub!(/='\//, %{='/} << version << '/')
      body.gsub!(/="\//, %{="/} << version << '/')
      content_type = 'text/html'
      directory.files.create(
        :body         => redirecter(key),
        :content_type => 'text/html',
        :key          => 'latest/' << file_name,
        :public       => true
      )
    else
      body = File.open(file_path)
      content_type = nil # leave it up to mime-types
    end
    directory.files.create(
      :body         => body,
      :content_type => content_type,
      :key          => key,
      :public       => true
    )
  end
  Formatador.redisplay(' ' * 128)
  Formatador.redisplay("Uploaded docs/_site\n")
end

task :upload_rdoc do
  # connect to storage provider
  Fog.credential = :geemus
  storage = Fog::Storage.new(:provider => 'AWS')
  directory = storage.directories.new(:key => 'fog.io')

  # write rdoc files to versioned 'folder'
  Rake::Task[:rdoc].invoke
  for file_path in Dir.glob('rdoc/**/*')
    next if File.directory?(file_path)
    file_name = file_path.gsub('rdoc/', '')
    key = '' << version << '/rdoc/' << file_name
    Formatador.redisplay(' ' * 128)
    Formatador.redisplay("Uploading [bold]#{key}[/]")
    directory.files.create(
      :body         => File.open(file_path),
      :key          => key,
      :public       => true
    )
  end
  Formatador.redisplay(' ' * 128)
  directory.files.create(
    :body         => redirecter("#{version}/rdoc/index.html"),
    :content_type => 'text/html',
    :key          => 'latest/rdoc/index.html',
    :public       => true
  )
  Formatador.redisplay("Uploaded rdoc\n")
end

def redirecter(path)
  redirecter = <<-HTML
<!doctype html>
<head>
<title>fog</title>
<meta http-equiv="REFRESH" content="0;url=http://fog.io/#{path}">
</head>
<body>
  <a href="http://fog.io/#{path}">redirecting to lastest (#{path})</a>
</body>
</html>
HTML
end