# The MIT License
# Copyright © 2009 Magnus Bergmark
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

class GitRemoteMonitor::Notifier
  
  def initialize()
    # TODO: Auto-discover notification systems and load the one the user have
    # For now, just use meow. REMEMBER: Remove 'meow' from the bin/ script when
    # this requirement changes here!
    
    require 'meow'
    @notifier = ::Meow.new('git-remote-monitor')
  end
  
  def notify_commits(name, branch_name, local_commits, remote_commits)
    message = get_message(local_commits, remote_commits)
    if message
      @notifier.notify("#{name} (#{branch_name})", message, :icon => "#{GitRemoteMonitor::PATH}/images/git-logo.png")
    end
  end
  
  protected
    def get_message(local_commits, remote_commits)
      # If there aren't any commits on the remote, we just ignore
      # this difference. It's because we don't want to notify the user
      # that they are x commits before the remote.
      unless remote_commits == 0

        # Now, we can have this scenarios:
        #   1. The branch has not diverged; user has no commits, but remote has.
        #   2. The branch has diverged; both the user and the remote has commits
        message = if local_commits > 0
          "Diverged! Remote has #{remote_commits} new commits, and you have #{local_commits} commits to push."
        else
          "Remote got updated! Now #{remote_commits} commits in front of you."
        end
        return message
      end
      nil
    end
    
end