module Gitpaint

# File lib/gitpaint.rb, line 136
def self.clean_local
  FileUtils.rm_rf "/tmp/#{config.repo}"
end

# File lib/gitpaint.rb, line 24
def self.config
  Config.instance.config
end

# File lib/gitpaint.rb, line 20
def self.configure
  yield Config.instance.config
end

# File lib/gitpaint.rb, line 157
def self.create
  r = github_client.create_repository config.repo
  r.ssh_url
end

# File lib/gitpaint.rb, line 28
def self.current_grid account 
  response = HTTParty.get 'https://github.com/users/%s/contributions' % account
  data = Nokogiri::HTML(response.body).xpath '//rect'

  weeks = []
  while data.count > 0 do
    weeks.push []
    7.times do
      d = data.shift
      begin
        value = d['data-count'].to_i
      rescue NoMethodError
        value = nil
      end
      weeks.last.push value  
    end
  end
  weeks.transpose
end

# File lib/gitpaint.rb, line 149
def self.custom_ssh_script dir = '/tmp'
  File.open "#{dir}/custom.sh", 'w' do |f|
    f.write "#!/bin/sh\n"
    f.write 'ssh -i "%s" "$@"' % config.ssh_key
  end
  FileUtils.chmod '+x', "#{dir}/custom.sh"
end

# File lib/gitpaint.rb, line 56
def self.data_to_dates data
  current_date = sunday_before_a_year_ago
  dates = {}
  line = pad_grid(data).transpose.flatten

  line.each do |value|
    dates[current_date.iso8601] = value if value > 0
    current_date += 1
  end

  dates
end

# File lib/gitpaint.rb, line 16
def self.github_client
  GithubClient.instance.client
end

# File lib/gitpaint.rb, line 86
def self.make_commit date, message: 'The commit is a lie'
  pieces = []

  pieces.push "GIT_AUTHOR_NAME=%s" % config.username
  pieces.push "GIT_AUTHOR_EMAIL=%s" % config.email
  pieces.push "GIT_AUTHOR_DATE=%sT12:00:00" % date
  pieces.push "GIT_COMMITTER_NAME=%s" % config.username
  pieces.push "GIT_COMMITTER_EMAIL=%s" % config.email
  pieces.push "GIT_COMMITTER_DATE=%sT12:00:00" % date

  "%s git commit --allow-empty -m '%s' > /dev/null" % [
    pieces.join(' '),
    message
  ]
end

# File lib/gitpaint.rb, line 124
def self.make_commits data,  message:
  FileUtils.chdir "/tmp/#{config.repo}"
  data = scale_commits data
  dates = data_to_dates data
  dates.each_pair do |date, count|
    count.times do
      s = Gitpaint.make_commit date, message: message
      `#{s}`
    end
  end
end

# File lib/gitpaint.rb, line 140
def self.nuke
  begin
    victim = github_client.repos.select { |r| r.name == config.repo }.first.id
    github_client.delete_repository victim
  rescue NoMethodError => e
    # do something here
  end
end

# File lib/gitpaint.rb, line 73
def self.pad_grid grid
  grid.map! { |row| pad_row row }

  until grid.count >= 7
    grid.push [0] * 52
  end
  grid
end

# File lib/gitpaint.rb, line 69
def self.pad_row row
  row + [0] * (52 - row.count)
end

# File lib/gitpaint.rb, line 102
def self.paint data, message: config.commit_message
  start_dir = Dir.pwd
  clean_local
  nuke

  unless data.flatten.uniq.delete_if { |i| i == 0 } == []
    remote = create
    custom_ssh_script
    Git.configure do |config|
      config.git_ssh = '/tmp/custom.sh'
    end

    g = Git.init "/tmp/#{config.repo}"
    g.add_remote 'origin', remote

    make_commits data, message: message

    push
  end
  FileUtils.chdir start_dir
end

# File lib/gitpaint.rb, line 162
def self.push
  g = Git.open "/tmp/#{config.repo}"
  g.push 'origin', 'master'
end

# File lib/gitpaint.rb, line 82
def self.scale_commits grid
  grid.map { |row| row.map { |v| v * config.scale_factor } }
end

# File lib/gitpaint.rb, line 48
def self.sunday_before_a_year_ago
  year_ago = (Date.today - 365)
  if Date.today.strftime('%A') == 'Sunday'
    return Date.today - 364
  end
  year_ago - year_ago.wday
end