#!/usr/bin/env ruby
require 'date'

activities = {}
activity = /[\s]+([^\s].+)[\W]{1,}#(.+)/
next_activities = []
start_entry = /(\d{2}\:\d{2})\-(\d{2}\:\d{2})/
time_worked = 0

file_to_parse = ARGV[0]
File.open(file_to_parse).each do |line|
  # parse out time spent, ignoring any lines starting with "-Lunch" or "-Break"
  match = start_entry.match(line)
  if match and !(line =~ /\-Break/) and !(line =~ /\-Lunch/)
    event_end = DateTime.parse(match[2])
    event_start = DateTime.parse(match[1])
    time_spent_mins = (event_end.hour * 60 + event_end.min) - (event_start.hour * 60 + event_start.min)
    time_worked += time_spent_mins
  end

  # parse out any activities (marked by a "#" tag at the end of the line)
  match = activity.match(line)
  if match
    thing_done = match[1].strip
    tag = match[2].strip
    activities[tag] = [] unless activities.has_key?(tag)
    activities[tag] << thing_done
  end

  # parse out any +NEXT lines (should be on their own line and not mixed with # tags)
  match = /\+NEXT\s+(.+)/.match(line)
  if match
    next_activities << match[1]
  end
end

activities = activities.sort

hours = time_worked / 60
hour_fraction = (time_worked % 60) / 60.0

warn "*************************************\n"
warn "Worked #{hours + hour_fraction} hours\n"

puts "*************************************\n"
puts "This week:\n\n"

activities.each do |tag, things_done|
  puts tag + ":\n\n"
  things_done.each {|thing| puts "  * #{thing}"}
  puts "\n"
end

puts "*************************************\n"
puts "Next:\n\n"

if next_activities.empty?
  puts "Nothing planned yet"
else
  next_activities.each {|n| puts "  * " + n}
end

puts "\n"