#! %RUBY%
# -*- mode: ruby -*-
#
# quickml-analog - a tool to analyze quickml's log file.
#
# Copyright (C) 2002-2004 Satoru Takabayashi <satoru@namazu.org> 
#     All rights reserved.
#     This is free software with ABSOLUTELY NO WARRANTY.
#
# You can redistribute it and/or modify it under the terms of 
# the GNU General Public License version 2.
#

require 'getoptlong'
require 'fileutils'
require 'time'
require 'cgi'
require 'open3'

class Array
  def tail (n)
    self[length - n, n]
  end
end

class SimpleHtmlGenerator
  def method_missing (symbol, *args)
    element = symbol.to_s
    if block_given?
      if args.empty?
        "<#{element}\n>" + yield + "</#{element}\n>"
      else
        "<#{element} " +
          args.first.map {|key, value| 
            sprintf('%s="%s"', key.to_s, CGI.escapeHTML(value.to_s))
          }.join(" ") + 
          "\n>" + yield +  "</#{element}\n>"
      end
    else
      if args.empty?
        "<#{element} /\n>"
      else
        "<#{element} " +
          args.first.map {|key, value|
            sprintf('%s="%s"', key.to_s, CGI.escapeHTML(value.to_s))
          }.join(" ") + 
          " /\n>"
      end
    end
  end
end

module QuickMLStatFiles
  def init_stat_file_names (output_dir)
    @stat_ml_file         = File.join(output_dir, "stat.ml")
    @stat_user_file       = File.join(output_dir, "stat.user")
    @stat_submit_file     = File.join(output_dir, "stat.submit")
    @stat_ktai_file       = File.join(output_dir, "stat.ktai")
    @stat_mdist_file      = File.join(output_dir, "stat.mdist")
    @stat_mdist2_file     = File.join(output_dir, "stat.mdist2")
    @stat_ldist_file      = File.join(output_dir, "stat.ldist")
    @stat_ldist2_file     = File.join(output_dir, "stat.ldist2")
  end
end

class QuickMLStat
  include QuickMLStatFiles

  def initialize (log_file, cache_file, output_dir)
    FileUtils.mkpath(output_dir)
    @log_file   = log_file
    @cache_file = cache_file
    init_stat_file_names(output_dir)

    @pos = 0
    @ml_members = Hash.new
    @stat_ml   = Hash.new
    @closed_ml_stat = Hash.new
    @created_ml_stat = Hash.new
    @stat_submit = Hash.new
    @stat_user = Hash.new
    @stat_user_uniq = Hash.new
    @stat_ktai = Hash.new
    @stat_ktai[:all] = Hash.new

    @stat_mdist = []
    @stat_ldist = []
    @created_time = Hash.new
    
    @ml_count = 0
    @closed_ml_count = 0
    @stat_submit_count = 0
    @users_count = 0
    @users_count_uniq = 0
    @users_uniq_mark = Hash.new
    @ktai_count = Hash.new
    @ktai_count.default = 0
  end

  def parse_line (line)
    if /^(\d\d(\d\d)-(\d\d)-(\d\d)T(\d\d)):\d\d:\d\d: (.*)/ =~ line 
      time = Time.parse($1)
      timestr =  $2 + $3 + $4 + $5
      msg = $6
      return time, timestr, msg
    else
      return nil, nil
    end
  end

  def parse_msg (msg)
    if /^\[(.*?)\]: (Add|Remove|New ML|ML Closed|Send)(?:: (.*))?/ =~ msg
      return $1, $2, $3
    else
      return nil, nil, nil
    end
  end

  def drop_hour (date)
    /(\d\d\d\d\d\d)\d\d/ =~ date
    return $1
  end

  def stat_of_ndays (stat, ndays)
    the_day = Time.at(Time.now - 86400 * ndays).strftime("%y%m%d")
    ndays_stat = Hash.new
    stat.keys.sort.reverse.each {|date|
      x = drop_hour(date)
      if x > the_day
	ndays_stat[date] = stat[date]
      else
	break
      end
    }
    ndays_stat
  end

  def write_stat (filename, stat)
    File.open(filename, "w") {|f|
      stat.keys.sort.each {|date|
	f.puts "#{date} #{stat[date]}"
      }
    }
  end

  def write_stat_ml
    monthly_stat = stat_of_ndays(@stat_ml, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)
    write_stat(@stat_ml_file, @stat_ml)
    write_stat(@stat_ml_file + ".month", monthly_stat)
    write_stat(@stat_ml_file + ".week", weekly_stat)
  end

  def write_stat_ml_closed
    monthly_stat = stat_of_ndays(@closed_ml_stat, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)

    write_stat(@stat_ml_file + ".closed", @closed_ml_stat)
    write_stat(@stat_ml_file + ".month.closed", monthly_stat)
    write_stat(@stat_ml_file + ".week.closed", weekly_stat)
  end

  def write_stat_ml_created
    monthly_stat = stat_of_ndays(@created_ml_stat, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)

    write_stat(@stat_ml_file + ".created", @created_ml_stat)
    write_stat(@stat_ml_file + ".month.created", monthly_stat)
    write_stat(@stat_ml_file + ".week.created", weekly_stat)
  end

  def write_stat_user
    monthly_stat = stat_of_ndays(@stat_user, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)

    write_stat(@stat_user_file, @stat_user)
    write_stat(@stat_user_file + ".month", monthly_stat)
    write_stat(@stat_user_file + ".week", weekly_stat)
  end

  def write_stat_user_uniq
    monthly_stat = stat_of_ndays(@stat_user_uniq, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)

    write_stat(@stat_user_file + ".uniq", @stat_user_uniq)
    write_stat(@stat_user_file + ".month.uniq", monthly_stat)
    write_stat(@stat_user_file + ".week.uniq", weekly_stat)
  end

  def write_stat_submit
    monthly_stat = stat_of_ndays(@stat_submit, 31)
    weekly_stat =  stat_of_ndays(monthly_stat, 7)

    write_stat(@stat_submit_file, @stat_submit)
    write_stat(@stat_submit_file + ".month", monthly_stat)
    write_stat(@stat_submit_file + ".week", weekly_stat)
  end

  def write_stat_ktai
    [:docomo, :au, :vodafone, :tuka, :h, :all].each {|carrier|
      next unless @stat_ktai[carrier]
      monthly_stat = stat_of_ndays(@stat_ktai[carrier], 31)
      weekly_stat =  stat_of_ndays(monthly_stat, 7)

      write_stat(@stat_ktai_file + "." + carrier.to_s, 
		 @stat_ktai[carrier])
      write_stat(@stat_ktai_file  + ".month" + "." + carrier.to_s, 
		 monthly_stat)
      write_stat(@stat_ktai_file  + ".week"  + "." + carrier.to_s, 
		 weekly_stat)
    }
  end

  def update_stat_mdist (mlname, stat_mdist = @stat_mdist)
    return if @ml_members[mlname].nil?
    nmembers = @ml_members[mlname].length
    stat_mdist[nmembers] = 0 if stat_mdist[nmembers].nil?
    stat_mdist[nmembers] += 1
  end

  def write_stat_mdist
    stat_mdist2 = []  # active ml only
    @ml_members.keys.each {|mlname|
      update_stat_mdist(mlname)
      update_stat_mdist(mlname, stat_mdist2)
    }

    [ [@stat_mdist_file, @stat_mdist],
      [@stat_mdist2_file, stat_mdist2]].each {|stat_mdist_file, stat_mdist|
      File.open(stat_mdist_file, "w") {|f|
        stat_mdist.each_with_index {|x, i|
          next unless i >= 1 && i <= 100
          if i and x
            f.printf "%d	%d\n", i, x
          end
        }
      }
    }
  end

  def write_stat_ldist
    f1 = File.open(@stat_ldist_file, "w")
    f2 = File.open(@stat_ldist2_file, "w")

    # To start X axis with one in ldist2, don't write it to f2.
    f1.puts "0	0"
    @stat_ldist.each_with_index {|x, i|
      if i and x
        f1.printf "%d	%d\n", i, x
        f2.printf "%d	%d\n", i, x
      end
    }
    f1.close
    f2.close
  end

  def update_stat_ktai (address, x)
    if /@docomo\.ne\.jp$/ =~ address
      @ktai_count[:docomo] += x
    elsif /[a-z]\d\.ezweb\.ne\.jp$/ =~ address
      @ktai_count[:tuka] += x
    elsif /@ezweb\.ne\.jp$/ =~ address
      @ktai_count[:au] += x
    elsif /@(jp-[a-z]\.ne\.jp|.\.vodafone\.ne\.jp)$/ =~ address
      @ktai_count[:vodafone] += x
    elsif /[.@]pdx\.ne\.jp$/ =~ address
      @ktai_count[:h] += x
    end
  end

  def add (mlname, address)
    @ml_members[mlname] = [] if @ml_members[mlname].nil?
    return if @ml_members[mlname].include?(address)
    @ml_members[mlname].push(address)
    @users_count += 1
    if @users_uniq_mark[address]
      @users_uniq_mark[address] += 1
    else @users_uniq_mark[address].nil? or @users_uniq_mark[address] <= 0
      @users_uniq_mark[address] = 1
      @users_count_uniq += 1
      update_stat_ktai(address, +1)
    end
  end

  def remove (mlname, address)
    @ml_members[mlname].delete(address) if @ml_members[mlname]
    @users_count -= 1
    return if @users_uniq_mark[address].nil?
    @users_uniq_mark[address] -= 1 if @users_uniq_mark[address] > 0
    if @users_uniq_mark[address] == 0
      @users_count_uniq -= 1 
      update_stat_ktai(address, -1)
    end
  end

  def update_stat_ldist (mlname, time)
    return if @ml_members[mlname].nil?
    return if @created_time[mlname].nil?
    ndays = ((time - @created_time[mlname]) / 86400).to_i
    nmonths = ndays / 32 + 1
    @stat_ldist[nmonths] = 0 if @stat_ldist[nmonths].nil?
    @stat_ldist[nmonths] += 1
  end

  def update_stat (time, timestr, mlname, command, address)
    case command
    when "Add"
      add(mlname, address)
    when "Remove"
      remove(mlname, address)
    when "New ML"
      @ml_members[mlname] = []
      @ml_count += 1
      @created_time[mlname] = time
    when "ML Closed"
      update_stat_mdist(mlname)
      update_stat_ldist(mlname, time)
      if @ml_members[mlname]
	@ml_members[mlname].each {|address| remove(mlname, address) }
      end
      @ml_members.delete(mlname)
      @ml_count -= 1
      @closed_ml_count += 1
    when "Send"
      @stat_submit_count += 1
      @stat_submit[timestr] = @stat_submit_count
    end
    @stat_user[timestr] = @users_count
    @stat_user_uniq[timestr] = @users_count_uniq
    @stat_ml[timestr] = @ml_count
    @closed_ml_stat[timestr] = @closed_ml_count
    @created_ml_stat[timestr] = @stat_ml[timestr] + @closed_ml_stat[timestr]
    ktai_all = 0
    [:docomo, :au, :vodafone, :tuka, :h].each {|carrier|
      @stat_ktai[carrier] = Hash.new unless @stat_ktai[carrier]
      @stat_ktai[carrier][timestr] = @ktai_count[carrier]
      ktai_all += @ktai_count[carrier]
    }
    @stat_ktai[:all][timestr] = ktai_all
  end

  def dump
    Marshal::dump(self, File.open(@cache_file, "w"))
  end

  def refresh (log_file, cache_file, output_dir)
    @log_file   = log_file
    @cache_file = cache_file
    init_stat_file_names(output_dir)
  end

  def process
    STDERR.puts "Analyzing the log file..."
    f = File.new(@log_file)
    f.seek(@pos)
    prev = nil
    while line = f.gets
      time, timestr, msg, address = parse_line(line)
      if timestr and msg
        STDERR.puts time if prev and prev.day < time.day
        prev = time
	mlname, command, address = parse_msg(msg)
	if mlname and command
	  update_stat(time, timestr, mlname, command, address)
	end
      end
    end
    STDERR.puts "Writing statistics files..."
    write_stat_ml
    write_stat_ml_closed
    write_stat_ml_created
    write_stat_user
    write_stat_user_uniq
    write_stat_submit
    write_stat_ktai
    write_stat_mdist
    write_stat_ldist
    @pos = f.pos
    dump
  end
end

class QuickMLPlot
  include QuickMLStatFiles

  def initialize (output_dir, generate_png_p)
    @output_dir = output_dir
    @generate_png_p = generate_png_p
    init_stat_file_names(output_dir)
    @gnuplot_file = File.join(output_dir, "quickml-analog.gp")
    property = Struct.new("Property", 
                          :size, :font_size, :infix, :format, :xlabel)
    @large = property.new(2.40, 40, "",   "%y/%m", nil)
    @small = property.new(0.72, 20, ".s", "%m",    nil)
    @languages = [:en, :ja]
  end

  def add_basic (f)
    Open3.popen3( "gnuplot" ) { |stdin, stdout, stderr|
      stdin.puts "show version"
      stdin.close
      stderr.read[/[Vv]ersion (\d+\.\d+)/]
    }
    if ( Float( $1 ) < 4.0 ) then
      f.print '
      set grid
      set timefmt "%y%m%d%H"
      set xdata time
      set size ratio 0.76
      set linestyle 1 linetype 1 linewidth 5
      set linestyle 2 linetype 3 linewidth 5
      set linestyle 3 linetype 2 linewidth 5
      set linestyle 4 linetype 4 linewidth 5
      set linestyle 5 linetype 5 linewidth 5
      set linestyle 6 linetype 7 linewidth 5

      '.gsub(/^    /, "")
    else
       f.print '
       set grid
       set timefmt "%y%m%d%H"
       set xdata time
       set size ratio 0.76
       set style line 1 linetype 1 linewidth 5
       set style line 2 linetype 3 linewidth 5
       set style line 3 linetype 2 linewidth 5
       set style line 4 linetype 4 linewidth 5
       set style line 5 linetype 5 linewidth 5
       set style line 6 linetype 7 linewidth 5

       '.gsub(/^    /, "")
    end
  end

  def add_chart (f, default, lang, chart_prefix, stat_files, type, 
                 options = {})

    stat_files.each {|file, title|
      file = File.join(@output_dir, file)
      return unless File.exists?(file)
      return if File.size(file) == 0
    }

    f.printf(%Q(set size %f\n), default.size) unless options[:size]
    f.printf(%Q(set terminal postscript eps color "Helvetica" %d\n), 
             default.font_size) unless options[:font_size]
    f.printf(%Q(set format x "%s"\n), default.format) unless options[:format]

    options.each {|key, value|
      if value.kind_of?(String)
        f.printf(%Q(set %s "%s"\n), key.to_s, value)
      elsif value.kind_of?(Integer)
        f.printf(%Q(set %s %d\n), key.to_s, value)
      elsif value.kind_of?(Symbol)
        f.printf(%Q(set %s %s\n), key.to_s, value.to_s)
      elsif value == nil
        f.printf(%Q(set %s\n), key.to_s)
      end
    }

    f.printf(%Q(set output "%s/%s%s.eps"\n), 
             lang, chart_prefix, default.infix)

    f.printf("plot ")
    i = 0
    f.print stat_files.map {|file, title|
      i += 1
      sprintf(%Q("%s" using 1:2 title "%s" with %s ls %d), 
              file, title, type, i)
    }.join(",\\\n     ") + "\n"
    f.puts
  end

  def add_stat_common (f, chart_prefix, infix, stat_files_table, title_table)
    small = @small.clone
    large = @large.clone

    xlabel_table = Hash.new
    xlabel_table[:md] = { :en => "Month/Day", :ja => "月/日" }
    xlabel_table[:d] = { :en => "Day", :ja => "日" }
    xlabel_table[:m] = { :en => "Month", :ja => "月" }
    xlabel_table[:ym] = { :en => "Year/Month", :ja => "年/月" }
    [:en, :ja].each {|lang|
      if infix == ".month"
        small.format = large.format = "%m/%d"
        small.xlabel = large.xlabel = xlabel_table[:md][lang]
      elsif infix == ".week"
        small.format = "%d"
        large.format = "%m/%d"
        small.xlabel = xlabel_table[:d][lang]
        large.xlabel = xlabel_table[:md][lang]
      else
        small.format = "%m"
        large.format = "%y/%m"
        small.xlabel = xlabel_table[:m][lang]
        large.xlabel = xlabel_table[:ym][lang]
      end

      stat_files = stat_files_table[lang]
      [small, large].each {|default|
        add_chart(f, default, lang, chart_prefix, stat_files, "lines",
                  :title => title_table[lang],
                  :xlabel => default.xlabel)
      }
    }
  end

  def add_stat_ml (f)
    ["", ".month", ".week"].each {|infix|
      basename = File.basename(@stat_ml_file)
      title_table = {
        :en => "Number of Mailing Lists",
        :ja => "メーリングリストの数"
      }
      stat_files_table = {
        :en => [
          ["#{basename}#{infix}.created",  "Created ML"],
          ["#{basename}#{infix}",          "Active ML"],
          ["#{basename}#{infix}.closed",   "Closed ML"]],
        :ja => [
          ["#{basename}#{infix}.created",  "開設ML"],
          ["#{basename}#{infix}",          "活発ML"],
          ["#{basename}#{infix}.closed",   "閉鎖ML"]]
      }
      add_stat_common(f, "#{basename}#{infix}",
                      infix, stat_files_table, title_table)
    }
  end

  def add_stat_user (f)
    ["", ".month", ".week"].each {|infix|
      basename = File.basename(@stat_user_file)
      title_table = {
        :en => "Number of Users",
        :ja => "ユーザ数"
      }
      stat_files_table = {
        :en => [
          ["#{basename}#{infix}",      "Number of users"],
          ["#{basename}#{infix}.uniq", "Number of users (unique)"]],
        :ja => [
          ["#{basename}#{infix}",      "ユーザ"],
          ["#{basename}#{infix}.uniq", "重複なしユーザ"]]
      }
      add_stat_common(f, "#{basename}#{infix}", 
                      infix, stat_files_table, title_table)
    }
  end

  def add_stat_ktai (f)
    ["", ".month", ".week"].each {|infix|
      basename = File.basename(@stat_ktai_file)
      title_table = {
        :en => "Number of Mobile Phone Users",
        :ja => "携帯電話のユーザ数"
      }
      stat_files_table = {
        :en => [
          ["#{basename}#{infix}.docomo",      "DoCoMo"],
          ["#{basename}#{infix}.vodafone",    "vodafone"],
          ["#{basename}#{infix}.au",          "au"],
          ["#{basename}#{infix}.h",           "DDI POCKET"],
          ["#{basename}#{infix}.tuka",        "TUKA"],
          ["#{basename}#{infix}.all",         "Mobile phones (total)"]],
        :ja => [
          ["#{basename}#{infix}.docomo",      "DoCoMo"],
          ["#{basename}#{infix}.vodafone",    "vodafone"],
          ["#{basename}#{infix}.au",          "au"],
          ["#{basename}#{infix}.h",           "DDI POCKET"],
          ["#{basename}#{infix}.tuka",        "TUKA"],
          ["#{basename}#{infix}.all",         "携帯電話(合計)"]]
      }
      add_stat_common(f, "#{basename}#{infix}", 
                      infix, stat_files_table, title_table)
    }
  end

  def add_stat_submit (f)
    ["", ".month", ".week"].each {|infix|
      basename = File.basename(@stat_submit_file)
      title_table = {
        :en => "Number of Submissions",
        :ja => "投稿数"
      }
      stat_files_table = {
        :en => [
          ["#{basename}#{infix}",      "Number of submissions"]],
        :ja => [
          ["#{basename}#{infix}",      "投稿数"]],
      }
      add_stat_common(f, "#{basename}#{infix}", 
                      infix, stat_files_table, title_table)
    }
  end

  def add_stat_ldist (f)
    [ @stat_ldist_file, @stat_ldist2_file].each {|stat_file|
      basename = File.basename(stat_file)
      stat_files = [[basename, ""]]

      title_table = {
        :en => "Distribution of Lifetime of Mailing Lists",
        :ja => "寿命の分布"
      }
      ylabel_table = {
        :en => "Number of mailing lists",
        :ja => "メーリングリスト数"
      }
      xlabel_table = {
        :en => "ML lifetime (months)",
        :ja => "寿命 (月)"
      }

      xtics_table = {:large => 1, :small => 5}

      if basename == "stat.ldist" 
        type = "boxes"
        logscale_p = false
      else
        type = "lines"
        logscale_p = true
      end
      [:en, :ja].each {|lang|
        [:small, :large].each {|size|
          default = if size == :large then @large else @small end
          options = {
            :title => title_table[lang],
            :xtics => xtics_table[size],
            :xdata => nil,
            "format x".intern => nil,
            :ylabel => ylabel_table[lang],
            :xlabel => xlabel_table[lang]
          }
          options[:logscale] = :y if logscale_p
          add_chart(f, default, lang, basename, stat_files, type, options)
        }
      }
    }
  end

  def add_stat_mdist (f)
    [@stat_mdist_file, @stat_mdist2_file].each {|stat_file|
      basename = File.basename(stat_file)
      stat_files = [[basename, ""]]
      title_table = {
        :en => "Distribution of Number of Members",
        :ja => "メンバー数の分布"
      }
      ylabel_table = {
        :en => "Number of mailing lists",
        :ja => "メーリングリスト数"
      }
      xlabel_table = {
        :en => "Number of members",
        :ja => "メンバー数"
      }

      type = "boxes"
      [:en, :ja].each {|lang|
        [:small, :large].each {|size|
          default = if size == :large then @large else @small end
          options = {
            :nologscale => nil,  # to cancel the setting set before
            :title => title_table[lang],
            :xtics => 10,
            :xdata => nil,
            "format x".intern => nil,
            :ylabel => ylabel_table[lang],
            :xlabel => xlabel_table[lang]
          }
          add_chart(f, default, lang, basename, stat_files, type, options)
        }
      }
    }
  end

  def image_link (g, image_prefix)
    g.a(:href => image_prefix + ".png") {
      g.img(:src => image_prefix + ".s.png", :alt=> "[chart]")
    }
  end

  def generate_index_html
    title = "QuickML Log Analysis"

    g = SimpleHtmlGenerator.new
    g.html {
      g.head {
        g.title { title }
      } + g.body {
        g.h1 { title } + g.hr +
        g.h2 { "Number of Mailing Lists" } +
        g.p {
          ["", ".month", ".week"].map {|infix|
            image_prefix = File.basename(@stat_ml_file + infix)
            image_link(g, image_prefix)
          }.join('')
        } +
        g.h2 { "Number of Users" } +
        g.p {
          ["", ".month", ".week"].map {|infix|
            image_prefix = File.basename(@stat_user_file + infix)
            image_link(g, image_prefix)
          }.join('')
        } +
        g.h2 { "Number of Mobile Phone Users" } +
        g.p {
          ["", ".month", ".week"].map {|infix|
            image_prefix = File.basename(@stat_ktai_file + infix)
            image_link(g, image_prefix)
          }.join('')
        } +
        g.h2 { "Number of Submissions" } +
        g.p {
          ["", ".month", ".week"].map {|infix|
            image_prefix = File.basename(@stat_submit_file + infix)
            image_link(g, image_prefix)
          }.join('')
        } + 
        g.h2 { "Lifetime of Mailing Lists" } +
        g.p {
          image_prefix1 = File.basename(@stat_ldist_file)
          image_prefix2 = File.basename(@stat_ldist2_file)
          image_link(g, image_prefix1) +
          image_link(g, image_prefix2)
        } +
        g.h2 { "Distribution of Number of Members" } +
        g.p {
          image_prefix1 = File.basename(@stat_mdist_file)
          image_prefix2 = File.basename(@stat_mdist2_file)
          image_link(g, image_prefix1) +
          image_link(g, image_prefix2)
        } + g.hr +
        g.p { "Generated on " + Time.now.to_s }
      }
    }
  end

  def process
    @languages.each {|lang|
      File.mkpath(File.join(@output_dir, lang.to_s))
    }

    STDERR.puts "Generating a gnuplot script..."
    File.open(@gnuplot_file, "w") {|f|
      add_basic(f)
      add_stat_ml(f)
      add_stat_user(f)
      add_stat_ktai(f)
      add_stat_submit(f)
      add_stat_ldist(f)
      add_stat_mdist(f)
    }

    STDERR.puts "Generating EPS files using gnuplot..."
    Dir.chdir(@output_dir)
    file = File.basename(@gnuplot_file)
    system("gnuplot #{file}")
 
    if @generate_png_p
      html = generate_index_html
      @languages.each {|lang|
        STDERR.puts "Generating PNG files using ImageMagick for #{lang}..."
        Dir.chdir(lang.to_s)
        system("for i in *.eps; do convert $i `basename $i .eps`.png; done")
        File.new("index.html", "w").write(html)
        Dir.chdir("..")
      }
    end
  end
end

def show_help
  puts "Usage: quickml-analog [OPTION...] FILE"
  puts "  -o, --output-dir=DIR   output files to DIR"
  puts "  -g, --gnuplot          draw charts in EPS using gnuplot"
  puts "  -i, --imagemagick      generate charts in PNG using ImageMagick"
  puts "  -f, --force            force analyzing (don't reuse cache data)"
  exit
end

def parse_options
  options = Hash.new
  parser = GetoptLong.new
  parser.set_options(['--output-dir',    '-o', GetoptLong::REQUIRED_ARGUMENT],
                     ['--gnuplot',       '-g', GetoptLong::NO_ARGUMENT],
                     ['--help',          '-h', GetoptLong::NO_ARGUMENT],
                     ['--imagemagick',   '-i', GetoptLong::NO_ARGUMENT],
                     ['--force',         '-f', GetoptLong::NO_ARGUMENT])
  parser.each_option {|name, arg|
    name.sub!(/^--/, "")
    options[name] = arg
  }
  return options
end

def main
  options = parse_options
  output_dir = (options['output-dir'] or ".")
  show_help if ARGV.empty? or options['help']

  log_file = ARGV.first

  cache_file = File.join(output_dir, "quickml-analog.dump")
  if File.exist?(cache_file) and !options['force']
    STDERR.puts "Loading the cache file..."
    stat = Marshal::load(File.new(cache_file))
    stat.refresh(log_file, cache_file, output_dir)
  else
    stat = QuickMLStat.new(log_file, cache_file, output_dir)
  end
  stat.process

  if options['gnuplot'] or options['imagemagick']
    plot = QuickMLPlot.new(output_dir, options['imagemagick'])
    plot.process
  end
end

main
