require 'rake/clean'
require 'rbconfig'

WARNING = <<-EOS 
   WARNING: you may not have curl installed, you could just download
   the correct version of jruby-complete and/or examples to the vendors 
   folder, and re-run k9 setup install instead of installing curl. Some 
   systems may also require 'sudo' access to install jruby-complete, 
   NB: this is untested....
      
EOS

JRUBYC_VERSION      = '1.7.20'
EXAMPLES                    = '0.0.6-pre'
HOME_DIR = ENV['HOME']
MAC_OR_LINUX = /linux|mac|darwin/ =~ RbConfig::CONFIG['host_os'] 
CLOBBER.include("jruby-complete-#{JRUBYC_VERSION}.jar", "#{EXAMPLES}.tar.gz", "video.zip")

desc "download, and copy to ruby-processing"
task :default => [:install_ruby, :install_video, :config, :install_examples]

desc "install jruby"
task :install_ruby => [:download, :copy_ruby]

desc "install video library"
task :install_video => [:download_video, :copy_video]


desc "install examples"
task :install_examples => [:download_examples, :copy_examples]


desc "download JRuby upstream sources"
task :download => ["jruby-complete-#{JRUBYC_VERSION}.jar"]

file "jruby-complete-#{JRUBYC_VERSION}.jar" do
  begin
    sh "curl -O https://s3.amazonaws.com/jruby.org/downloads/#{JRUBYC_VERSION}/jruby-complete-#{JRUBYC_VERSION}.jar"    
  rescue
    warn(WARNING)
  end
  check_sha1("jruby-complete-#{JRUBYC_VERSION}.jar", "0f784b3d9d760b80b2f9d78ede80ee1d8d85e786")
end

desc "download processing video-library"
task :download_video => ["video.zip"]

file "video.zip" do
  begin
    sh "curl -O https://github.com/processing/processing-video/releases/download/latest/video.zip"    
  rescue
    warn(WARNING)
  end
end

directory "../lib/ruby"

desc "copy jruby-complete"
task :copy_ruby => ["../lib/ruby"] do
  sh "cp -v jruby-complete-#{JRUBYC_VERSION}.jar ../lib/ruby/jruby-complete.jar"
end

desc "download, and copy to JRubyArt"
task :unpack_samples => [:download_examples, :copy_examples]



desc 'download and copy examples to user home'
task :download_examples
file_name = (MAC_OR_LINUX.nil?) ? "#{EXAMPLES}.zip" : "#{EXAMPLES}.tar.gz"
file file_name do
  begin
    if MAC_OR_LINUX.nil?
      sh "curl -Lo examples.zip https://github.com/ruby-processing/JRubyArt-examples/archive/#{EXAMPLES}.zip"
    else
      sh "curl -Lo examples.tar.gz https://github.com/ruby-processing/JRubyArt-examples/archive/#{EXAMPLES}.tar.gz"
    end
  rescue
    warn(WARNING)
  end
end



desc "copy video library"

task :copy_video => ["../library/video/lib"] do  
  sh "unzip video.zip"
  Dir["video/library/*.jar"].each do |f|
    sh "cp #{f} ../library/video/lib"
  end
  sh "cp -r video/library/windows32 ../library/video/lib" 
  sh "cp -r video/library/windows64 ../library/video/lib"
  sh "cp -r video/library/macosx64 ../library/video/lib" 
end

desc "copy examples"
task :copy_examples => file_name do
  if MAC_OR_LINUX.nil?
    sh "unzip examples.zip"
  else
    sh "tar xzvf examples.tar.gz" 
  end
  sh "cp -r JRubyArt-examples-#{EXAMPLES} #{HOME_DIR}/examples"  
  sh "rm -r JRubyArt-examples-#{EXAMPLES}"     
end

desc "config"
task :config => file_name do
  next if FileTest.exist?("#{HOME_DIR}/.jruby_art/config.yml")
  sh "tar xzvf config.tar.gz"
  sh "cp -r .jruby_art #{HOME_DIR}"
end  

def check_sha1(filename, expected_hash)
  require "digest/sha1"
  sha1 = Digest::SHA1.new
  File.open(filename, "r") do |f|
    while buf = f.read(4096)
      sha1.update(buf)
    end
  end
  if sha1.hexdigest != expected_hash
    raise "bad sha1 checksum for #{filename} (expected #{expected_hash} got #{sha1.hexdigest})"
  end
end