#!/usr/bin/env ruby
# encoding: UTF-8
# coding: UTF-8

require 'date'
require 'fileutils'
require File.realdirpath(__FILE__).gsub(/build.*$/, '') + "template/site/main_lang.rb"

# Displays message when something goes wrong
def check condition, err_msg
  if condition then puts err_msg + ' For help use -h or --help.'; abort end
end

# To the root directory
Dir.chdir(File.dirname(__FILE__) + '/../..')

# Variables
locale        = ''
content       = []
template_dir  = 'config/template/site/'

# Displays help
if ARGV[0] =~ /-h/
  puts "create-indexes-feeds generates the index and feed file for each language."
  puts "\nUse:"
  puts "  create-indexes-feeds"
  abort
end

# Formats date in RFC 2822
def format_date date
  raw_date = date.gsub(/[\/:]/, ',').gsub(/[\s+|[A-Za-zÁÉÍÓÚÜáéíóúü]+]/, '').split(',')
  raw_date = raw_date.reject{|e| e.empty?}
  par_date = DateTime.new(raw_date[0].to_i, raw_date[1].to_i, raw_date[2].to_i,
                          raw_date[3].to_i, raw_date[4].to_i, raw_date[5].to_i,
                          DateTime.now.to_s[-6..-6] + DateTime.now.to_s[-4..-4])
  return par_date.rfc2822
end

# Itinerates each locale
Dir.glob('content/html/*').each do |local|
  locale  = local.split('/').last
  content = []
  rss     = []
  
  # Gets the metadata of each post
  Dir.glob(local + '/*').each do |f|
    if File.basename(f) =~ /^\d+/
      file  = f.split('/').last
      title = File.read(f)
                  .gsub(/\n/, '')
                  .split(/<section>\s+<h1[^<]*?>/).last
                  .split(/<\/h1>/).first
                  .strip
      date  = File.read(f)
                  .gsub(/\n/, '')
                  .gsub(/^.*?#{$template_lang[locale]['published']}\s+([^<]+?)<.*$/, '\1')
                  .gsub(/\s*\|\s*/, '')
                  .strip

      if title != '' && title !~ /DOCTYPE/
        content.push('      <div class="post">' + "\n" +
                     '        <p><a href="' + file + '">' + file.gsub(/_.*$/, '').to_i.to_s + '. '  + title + '</a></p>' + "\n" +
                     '        <p>[' + $template_lang[locale]['published'] + ' ' + date + ']</p>' + "\n" +
                     '      </div>')
      end
    end
  end

  # Inverse posts order from the newest to the oldest
  content.sort!.reverse!

  # Creates the items for RSS feed
  content.each do |c|
    title = c.split('">').last.split('</a>').first
    link  = 'https://perrotuerto.blog/content/html/' + locale + '/' + c.split('href="').last.split('"').first
    date  = format_date(c.split('[').last.split(']').first)
    rss.push('  <item>' + "\n" +
             '    <title>' + title  + '</title>' + "\n" +
             '    <link>' + link  + '</link>' + "\n" +
             '    <pubDate>' + date  + '</pubDate>' + "\n" +
             '    <guid isPermaLink="false">guid' + title.split('.')[0]  + '</guid>' + "\n" +
             '  </item>')
  end

  # Cleans and adds headers and footer for index
  content.unshift(File.read(template_dir + 'header.html'))
  content.unshift(File.read(template_dir + 'head.html'))
  content.push(File.read(template_dir + 'footer.html'))
  content = content.join("\n").gsub(/\n\n/, "\n")

  # Replaces some strings for index
  content = content.gsub('@file', 'index.html')
  content = content.gsub('@locale', locale)
  content = content.gsub('@title', $template_lang[locale]['main'])
  content = content.gsub('@links', $template_lang[locale]['links'])
  content = content.gsub('@about', $template_lang[locale]['about'])
  content = content.gsub('@contact', $template_lang[locale]['contact'])
  content = content.gsub('@fork', $template_lang[locale]['fork'])
  content = content.gsub('@donate', $template_lang[locale]['donate'])
  content = content.gsub('@copyfarleft', $template_lang[locale]['copyfarleft'])
  content = content.gsub('@copyleft', $template_lang[locale]['copyleft'])
  content = content.gsub('@license1', $template_lang[locale]['license1'])
  content = content.gsub('@license2', $template_lang[locale]['license2'])
  content = content.gsub('@build', $template_lang[locale]['build'])
  content = content.gsub('@date', Time.now.strftime('%Y/%m/%d, %H:%M'))

  # Creates index
  file = File.open(local + '/index.html', 'w:utf-8')
  file.puts content
  file.close

  # Cleans and add header and footer for RSS
  rss.unshift(File.read(template_dir + 'head.xml'))
  rss.push(File.read(template_dir + 'foot.xml'))
  rss = rss.join("\n").gsub(/\n\n/, "\n")

  # Replaces some strings for RSS
  rss = rss.gsub('@locale', locale)
  rss = rss.gsub('@date', format_date(Time.now.strftime('%Y/%m/%d, %H:%M')))

  # Creates  RSS
  file = File.open(Dir.pwd + '/feed/' + locale + '/rss.xml', 'w:utf-8')
  file.puts rss
  file.close
end