require 'rake/clean'

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

WARN

JRUBYC_VERSION     = '9.2.6.0'.freeze

EXAMPLES           = '3.2'.freeze
HOME_DIR = ENV['HOME']
MAC_OR_LINUX = /linux|mac|darwin/ =~ RbConfig::CONFIG['host_os']

CLOBBER << "jruby-complete-#{JRUBYC_VERSION}.jar"
CLOBBER << "jruby-complete-#{JRUBYC_VERSION}.jar.sha256"

file "jruby-complete-#{JRUBYC_VERSION}.jar.sha256" do
  begin
    sh "wget https://repo1.maven.org/maven2/org/jruby/jruby-complete/#{JRUBYC_VERSION}/jruby-complete-#{JRUBYC_VERSION}.jar.sha256"
  rescue
    warn(WARNING)
  end
end

desc 'get sha256'
task get_sha256: ["jruby-complete-#{JRUBYC_VERSION}.jar.sha256"]

desc 'download, and copy to jruby_art'
task default: %i[get_sha256 download copy_ruby]

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

file "jruby-complete-#{JRUBYC_VERSION}.jar" do
  begin
    sh "wget https://repo1.maven.org/maven2/org/jruby/jruby-complete/#{JRUBYC_VERSION}/jruby-complete-#{JRUBYC_VERSION}.jar"
  rescue
    warn(WARNING)
  end
  value = File.read("jruby-complete-#{JRUBYC_VERSION}.jar.sha256")
  check_sha256("jruby-complete-#{JRUBYC_VERSION}.jar", value)
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

def check_sha256(filename, expected_hash)
  require 'digest'
  sha256 = Digest::SHA256.new
  File.open(filename, 'r') do |f|
    while (buf = f.read(4096))
      sha256.update(buf)
    end
  end
  next if sha256.hexdigest == expected_hash

  raise "bad sha256 checksum for #{filename} (expected #{expected_hash} got #{sha256.hexdigest})"
end

desc 'download, and copy to jruby_art'
task unpack_samples: %i[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 "wget https://github.com/ruby-processing/JRubyArt-examples/archive/#{EXAMPLES}.zip"
    else
      sh "wget https://github.com/ruby-processing/JRubyArt-examples/archive/#{EXAMPLES}.tar.gz"
    end
  rescue
    warn(WARNING)
  end
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 "rm -r #{HOME_DIR}/k9_samples" if File.exist? "#{HOME_DIR}/k9_samples"
  sh "cp -r JRubyArt-examples-#{EXAMPLES} #{HOME_DIR}/k9_samples"
  sh "rm -r JRubyArt-examples-#{EXAMPLES}"
end