#!/usr/bin/env ruby

require 'rubygems'

require 'chronic'
require 'optparse'
require 'timestream/employee_activity_report'
require 'timestream/hamster'
require 'timestream/version'

options = {}

option_parser = OptionParser.new do |option_parser|
  option_parser.banner = "Usage: timestream [--date-format=DATE_FORMAT] [--week YYYY-MM-DD]"
  
  options[:date_format] = :day_of_week
  option_parser.on('-d',
          '--date-format DATE_FORMAT',
          "Format dates according to DATE_FORMAT.  Supports DATE_FORMAT of 'day_of_week', or 'erp'.") do |date_format|
    options[:date_format] = date_format.to_sym
  end
  
  option_parser.on_tail('-h', '--help', 'Show this message') do
    puts option_parser
    exit
  end
  
  option_parser.on_tail('--version', 'Show version') do
    puts Timestream::VERSION
    exit
  end
  
  option_parser.on('--week WEEK',
                   "Read in data from Hamster and write it out to EAR for WEEK " \
                   "beginning on Saturday.  Use Chronic gem for parsing WEEK, " \
                   "so you do strings like 'last saturday'") do |week|
    time = Chronic.parse(week, :context => :past)
    options[:saturday] = Date.new(time.year, time.month, time.day)
  end
end

option_parser.parse!

employee_activity_report = Timestream::EmployeeActivityReport.new ARGV[0]

DAYS_PER_WEEK = 7
HOURS_PER_DAY = 24
MINUTES_PER_HOUR = 60
SECONDS_PER_MINUTE = 60
HOURS_PER_WEEK = DAYS_PER_WEEK * HOURS_PER_DAY
MINUTES_PER_WEEK = HOURS_PER_WEEK * MINUTES_PER_HOUR
SECONDS_PER_WEEK = MINUTES_PER_WEEK * SECONDS_PER_MINUTE 

if options[:saturday]
  saturday_date = options[:saturday]
  saturday_time = Time.local(saturday_date.year, saturday_date.month, saturday_date.day)
  # next saturday - 1 second for 23:59 on Friday
  friday_time = saturday_time + (SECONDS_PER_WEEK) - 1
  hamster = Timestream::Hamster.new(saturday_time, friday_time)
  
  employee_activity_report.updateFromHamster!(hamster)
end

puts employee_activity_report.to_text_table(options[:date_format])