# -*- ruby -*-
require 'rake/extensiontask'
require 'rspec/core/rake_task'
require 'rubocop/rake_task'
require 'bundler/gem_tasks'
require 'fileutils'

require_relative 'build_config.rb'

load 'tools/distrib/rake_compiler_docker_image.rb'

# Add rubocop style checking tasks
RuboCop::RakeTask.new(:rubocop) do |task|
  task.options = ['-c', 'src/ruby/.rubocop.yml']
  # add end2end tests to formatter but don't add generated proto _pb.rb's
  task.patterns = ['src/ruby/{lib,spec}/**/*.rb', 'src/ruby/end2end/*.rb']
end

spec = Gem::Specification.load('grpc.gemspec')

Gem::PackageTask.new(spec) do |pkg|
end

# Add the extension compiler task
Rake::ExtensionTask.new('grpc_c', spec) do |ext|
  ext.source_pattern = '**/*.{c,h}'
  ext.ext_dir = File.join('src', 'ruby', 'ext', 'grpc')
  ext.lib_dir = File.join('src', 'ruby', 'lib', 'grpc')
  ext.cross_compile = true
  ext.cross_platform = [
    'x86-mingw32', 'x64-mingw32',
    'x86_64-linux', 'x86-linux',
    'x86_64-darwin', 'arm64-darwin',
    'universal-darwin'
  ]
  ext.cross_compiling do |spec|
    spec.files = spec.files.select {
      |file| file.start_with?(
        "src/ruby/bin/", "src/ruby/ext/", "src/ruby/lib/", "src/ruby/pb/")
    }
    spec.files += %w( etc/roots.pem grpc_c.32.ruby grpc_c.64.ruby )
  end
end

CLEAN.add "src/ruby/lib/grpc/[0-9].[0-9]", "src/ruby/lib/grpc/grpc_c.{bundle,so}"

# Define the test suites
SPEC_SUITES = [
  { id: :wrapper, title: 'wrapper layer', files: %w(src/ruby/spec/*.rb) },
  { id: :idiomatic, title: 'idiomatic layer', dir: %w(src/ruby/spec/generic),
    tags: ['~bidi', '~server'] },
  { id: :bidi, title: 'bidi tests', dir: %w(src/ruby/spec/generic),
    tag: 'bidi' },
  { id: :server, title: 'rpc server thread tests', dir: %w(src/ruby/spec/generic),
    tag: 'server' },
  { id: :pb, title: 'protobuf service tests', dir: %w(src/ruby/spec/pb) }
]
namespace :suite do
  SPEC_SUITES.each do |suite|
    desc "Run all specs in the #{suite[:title]} spec suite"
    RSpec::Core::RakeTask.new(suite[:id]) do |t|
      ENV['COVERAGE_NAME'] = suite[:id].to_s
      spec_files = []
      suite[:files].each { |f| spec_files += Dir[f] } if suite[:files]

      if suite[:dir]
        suite[:dir].each { |f| spec_files += Dir["#{f}/**/*_spec.rb"] }
      end
      helper = 'src/ruby/spec/spec_helper.rb'
      spec_files << helper unless spec_files.include?(helper)

      t.pattern = spec_files
      t.rspec_opts = "--tag #{suite[:tag]}" if suite[:tag]
      if suite[:tags]
        t.rspec_opts = suite[:tags].map { |x| "--tag #{x}" }.join(' ')
      end
    end
  end
end

desc 'Build the Windows gRPC DLLs for Ruby. The argument contains the list of platforms for which to build dll. Empty placeholder files will be created for platforms that were not selected.'
task 'dlls', [:plat] do |t, args|
  grpc_config = ENV['GRPC_CONFIG'] || 'opt'
  verbose = ENV['V'] || '0'
  # use env variable to set artifact build paralellism
  nproc_override = ENV['GRPC_RUBY_BUILD_PROCS'] || `nproc`.strip
  plat_list = args[:plat]

  build_configs = []
  w64 = { cross: 'x86_64-w64-mingw32', out: 'grpc_c.64.ruby', platform: 'x64-mingw32' }
  w32 = { cross: 'i686-w64-mingw32', out: 'grpc_c.32.ruby', platform: 'x86-mingw32' }
  [w64, w32].each do |config|
    if plat_list.include?(config[:platform])
      # build the DLL (as grpc_c.*.ruby)
      build_configs.append(config)
    else
      # create an empty grpc_c.*.ruby file as a placeholder
      FileUtils.touch config[:out]
    end
  end

  env = 'CPPFLAGS="-D_WIN32_WINNT=0x600 -DNTDDI_VERSION=0x06000000 -DUNICODE -D_UNICODE -Wno-unused-variable -Wno-unused-result -DCARES_STATICLIB -Wno-error=conversion -Wno-sign-compare -Wno-parentheses -Wno-format -DWIN32_LEAN_AND_MEAN" '
  env += 'CFLAGS="-Wno-incompatible-pointer-types" '
  env += 'CXXFLAGS="-std=c++14 -fno-exceptions" '
  env += 'LDFLAGS=-static '
  env += 'SYSTEM=MINGW32 '
  env += 'EMBED_ZLIB=true '
  env += 'EMBED_OPENSSL=true '
  env += 'EMBED_CARES=true '
  env += 'BUILDDIR=/tmp '
  env += "V=#{verbose} "
  env += "GRPC_RUBY_BUILD_PROCS=#{nproc_override} "

  out = GrpcBuildConfig::CORE_WINDOWS_DLL

  # propagate env variables with ccache configuration to the rake-compiler-dock docker container
  # and setup ccache symlinks as needed.
  # TODO(jtattermusch): deduplicate creation of prepare_ccache_cmd
  prepare_ccache_cmd = "export GRPC_BUILD_ENABLE_CCACHE=\"#{ENV.fetch('GRPC_BUILD_ENABLE_CCACHE', '')}\" && "
  prepare_ccache_cmd += "export CCACHE_SECONDARY_STORAGE=\"#{ENV.fetch('CCACHE_SECONDARY_STORAGE', '')}\" && "
  prepare_ccache_cmd += "export PATH=\"$PATH:/usr/local/bin\" && "
  prepare_ccache_cmd += "source tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc "

  build_configs.each do |opt|
    env_comp = "CC=#{opt[:cross]}-gcc "
    env_comp += "CXX=#{opt[:cross]}-g++ "
    env_comp += "LD=#{opt[:cross]}-gcc "
    env_comp += "LDXX=#{opt[:cross]}-g++ "
    run_rake_compiler(opt[:platform], <<~EOT)
      #{prepare_ccache_cmd} && \
      gem update --system --no-document && \
      #{env} #{env_comp} make -j#{nproc_override} #{out} && \
      #{opt[:cross]}-strip -x -S #{out} && \
      cp #{out} #{opt[:out]}
    EOT
  end
end

desc 'Build the native gem file under rake_compiler_dock. Optionally one can pass argument to build only native gem for a chosen platform.'
task 'gem:native', [:plat] do |t, args|
  verbose = ENV['V'] || '0'

  grpc_config = ENV['GRPC_CONFIG'] || 'opt'
  ruby_cc_versions = ['3.1.0', '3.0.0', '2.7.0', '2.6.0', '2.5.0'].join(':')
  selected_plat = "#{args[:plat]}"

  if RUBY_PLATFORM =~ /darwin/
    if !selected_plat.empty? && selected_plat != 'darwin'
      fail "Cannot pass platform as an argument when on Darwin."
    end

    FileUtils.touch 'grpc_c.32.ruby'
    FileUtils.touch 'grpc_c.64.ruby'
    unless '2.5' == /(\d+\.\d+)/.match(RUBY_VERSION).to_s
      fail "rake gem:native (the rake task to build the binary packages) is being " \
        "invoked on macos with ruby #{RUBY_VERSION}. The ruby macos artifact " \
        "build should be running on ruby 2.5."
    end
    system "bundle exec rake cross native gem RUBY_CC_VERSION=#{ruby_cc_versions} V=#{verbose} GRPC_CONFIG=#{grpc_config}"
  else
    # use env variable to set artifact build paralellism
    nproc_override = ENV['GRPC_RUBY_BUILD_PROCS'] || `nproc`.strip

    # propagate env variables with ccache configuration to the rake-compiler-dock docker container
    # and setup ccache symlinks as needed.
    prepare_ccache_cmd = "export GRPC_BUILD_ENABLE_CCACHE=\"#{ENV.fetch('GRPC_BUILD_ENABLE_CCACHE', '')}\" && "
    prepare_ccache_cmd += "export CCACHE_SECONDARY_STORAGE=\"#{ENV.fetch('CCACHE_SECONDARY_STORAGE', '')}\" && "
    prepare_ccache_cmd += "export PATH=\"$PATH:/usr/local/bin\" && "
    prepare_ccache_cmd += "source tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc "

    supported_windows_platforms = ['x86-mingw32', 'x64-mingw32']
    supported_unix_platforms = ['x86_64-linux', 'x86-linux', 'x86_64-darwin', 'arm64-darwin']
    supported_platforms = supported_windows_platforms + supported_unix_platforms

    if selected_plat.empty?
      # build everything
      windows_platforms = supported_windows_platforms
      unix_platforms = supported_unix_platforms
    else
      # build only selected platform
      if supported_windows_platforms.include?(selected_plat)
        windows_platforms = [selected_plat]
        unix_platforms = []
      elsif supported_unix_platforms.include?(selected_plat)
        windows_platforms = []
        unix_platforms = [selected_plat]
      else
        fail "Unsupported platform '#{selected_plat}' passed as an argument."
      end
    end

    # Create the windows dlls or create the empty placeholders
    Rake::Task['dlls'].execute(plat: windows_platforms)

    windows_platforms.each do |plat|
      run_rake_compiler(plat, <<~EOT)
        #{prepare_ccache_cmd} && \
        gem update --system --no-document && \
        bundle && \
        bundle exec rake clean && \
        bundle exec rake native:#{plat} pkg/#{spec.full_name}-#{plat}.gem pkg/#{spec.full_name}.gem \
          RUBY_CC_VERSION=#{ruby_cc_versions} \
          V=#{verbose} \
          GRPC_CONFIG=#{grpc_config} \
          GRPC_RUBY_BUILD_PROCS=#{nproc_override}
      EOT
    end

    # Truncate grpc_c.*.ruby files because they're for Windows only and we don't want
    # them to take up space in the gems that don't target windows.
    File.truncate('grpc_c.32.ruby', 0)
    File.truncate('grpc_c.64.ruby', 0)

    unix_platforms.each do |plat|
      run_rake_compiler(plat, <<~EOT)
        #{prepare_ccache_cmd} && \
        gem update --system --no-document && \
        bundle && \
        bundle exec rake clean && \
        bundle exec rake native:#{plat} pkg/#{spec.full_name}-#{plat}.gem pkg/#{spec.full_name}.gem \
          RUBY_CC_VERSION=#{ruby_cc_versions} \
          V=#{verbose} \
          GRPC_CONFIG=#{grpc_config} \
          GRPC_RUBY_BUILD_PROCS=#{nproc_override}
      EOT
    end
  end
end

# Define dependencies between the suites.
task 'suite:wrapper' => [:compile, :rubocop]
task 'suite:idiomatic' => 'suite:wrapper'
task 'suite:bidi' => 'suite:wrapper'
task 'suite:server' => 'suite:wrapper'
task 'suite:pb' => 'suite:server'

desc 'Compiles the gRPC extension then runs all the tests'
task all: ['suite:idiomatic', 'suite:bidi', 'suite:pb', 'suite:server']
task default: :all