require 'titleize'
require 'colorize'

Encoding.default_internal = Encoding::UTF_8
Encoding.default_external = Encoding::UTF_8

$dir = Rake.original_dir.encode(Encoding::UTF_8)
Dir.chdir($dir)
puts "Executing in (#{$dir})..."

if $dir =~ /\d-\d/
  puts 'Name not found'
  $stdin.gets
  exit 1
end

m = $dir.match %r(/(\d\d)(\d\d)./(\D*)(\d)?(.+)?)
name = "2017-#{m[1]}-#{m[2]} #{m[3].titleize}"
name += " \##{m[4]}" if m[4]
name += m[5] if m[5]
puts name

task :default => ['_done.mp4', :cut]
task :cut => "#{name}.mp4"

file '_comb.ts' do |t|
  sh "copy /b *_0*.ts #{t.name}"
end

file '_a.aac' => '_comb.ts' do |t|
  sh "eac3to #{t.source} 1:_v.h264 2:_a.aac"
end
file '_a2.aac' => '_a.aac' do |t|
  sh "eac3to #{t.source} #{t.name} +250ms"
end
file_create '_v.h264' => '_a.aac'
file '_done.mp4' => ['_v.h264', '_a2.aac'] do |t|
  sh "muxer -i _v.h264 -i _a2.aac -o #{t.name}"
end
file "#{name}.mp4" => '_done.mp4' do |t|
  duration = `mediainfo -f #{t.source}`.lines.grep(/Duration/).first
  duration = duration[/: (\d+)/, 1].to_i / 1000 + 2
  sh "mp4box -splitx 12:#{duration} #{t.source} -out \"#{t.name}\""
end
# sh 'mp4box -splitx 12:3000 a.mp4'

# Pre Check

numbers = Dir['*_0*.ts'].map { |f| f[/_0(\d+)/, 1].to_i }
dangers = numbers[0..-2].zip(numbers[1..-1]).select { |e| e[1] - e[0] > 1 && e[1] - e[0] < 10 }
dangers.each do |e|
  printf "[WARNING] %04d-%04d Diff:%d\n".on_blue.blink, e[0], e[1], e[1]-e[0]
end
$stdin.gets if dangers.any?