#!/usr/bin/ruby

require 'clog'
include Clog

require 'optparse'
require 'yaml'
require 'ostruct'
require 'zlib'
require 'time'

# command-line options
options = OpenStruct.new({
  :config_file => "/etc/clog/clog.conf",
  :from => parsedate("yesterday"),
  :to => parsedate("now")
})
opts = OptionParser.new do |opts|
  opts.banner = "usage: #{$0} [options]"
  
  opts.on('-c','--config PATH','specify configuration file') {
    |options.config_file|}
  opts.on('-C','--show-config','show real configuration') {
    |options.show_config|}
  opts.on('-f','--from DATE','start date (yesterday)') { |d|
    options.from = parsedate(d)
  }
  opts.on('-t','--to DATE','start date (now)') { |d|
    options.to = parsedate(d)
  }
  opts.on('-h','--help','this message') { puts opts; exit }
  opts.separator ''
  opts.separator('Dates are in the format that date(1) accepts')
end
opts.parse!(ARGV)
starttime = Time.now

# configuration file
config = OpenStruct.new(YAML.load(File.read(options.config_file))) rescue begin 
  puts "Error reading config file #{options.config_file}"
  puts opts
  exit 1
end
config.agent_dirs ||= []
puts config.inspect if options.show_config

# load agents
config.agent_dirs = [config.agent_dirs] if config.agent_dirs === String
($: + config.agent_dirs).each do |path|
  Dir.glob("#{path}/clog/agents/*.rb") { |f| require f }
end
directors = []
if config.files.nil?
  $stderr.puts "Nothing to do."
  exit(1)
end
config.files.each do |f|
  glob = f['glob']
  agents = []
  f['agents'].each do |a|
    agents.push eval("Clog::#{a}.new")
  end
  ignore = f['ignore']
  directors.push Director.new(glob,agents,ignore,options.from,options.to)
end

# run
directors.each {|d| d.run}

# output
puts <<EOF

********************************* clog *********************************
From: #{options.from.rfc2822} 
To: #{options.to.rfc2822}

Processing time: #{Time.now - starttime} seconds
************************************************************************

EOF

directors.each do |d| 
  puts d.report 
end