#!/usr/bin/ruby

require 'time'

commit_file = ARGV[0]
branch = `git branch | grep '*'`.strip.split(/\s/)[1]

elapsed_time = 0
state = "out"
last_time = 0

if File.exists?(".git/timelogs/#{branch}")
  open(".git/timelogs/#{branch}") do |file|
    file.each_line do |line|
      in_out = line.split(/\s/)[0]
      time = Time.iso8601(line.split(/\s/)[1])
      unless state == in_out
        state = in_out
        if in_out == 'in'
          last_time = time
        else
          elapsed_time += time - last_time unless last_time == 0
        end
      end
    end
  end
  
  if state == "in"
    elapsed_time += Time.now - last_time unless last_time == 0
  end

  if commit_file
    open(commit_file, "a") do |file|
      file.puts "This commit took #{(elapsed_time/60.0 > 60) ? sprintf('%.2f', (elapsed_time/3600.0)) + " hours" : sprintf('%.2f', (elapsed_time/60.0)) + " minutes"}"
    end
  else
    puts "This commit took #{(elapsed_time/60.0 > 60) ? sprintf('%.2f', (elapsed_time/3600.0)) + " hours" : sprintf('%.2f', (elapsed_time/60.0)) + " minutes"}"
  end
end

  
open(".git/timelogs/#{branch}", "w") do |file|
  file.puts "in #{Time.now.iso8601}"
end