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

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', 'x64-mingw-ucrt',
    'x86_64-linux', 'x86-linux', 'aarch64-linux',
    'x86_64-darwin', 'arm64-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-msvcrt.ruby grpc_c.64-msvcrt.ruby grpc_c.64-ucrt.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 = [
    { cross: 'x86_64-w64-mingw32', out: 'grpc_c.64-ucrt.ruby', platform: 'x64-mingw-ucrt' },
    { cross: 'x86_64-w64-mingw32', out: 'grpc_c.64-msvcrt.ruby', platform: 'x64-mingw32' },
    { cross: 'i686-w64-mingw32', out: 'grpc_c.32-msvcrt.ruby', platform: 'x86-mingw32' }
  ]
  selected_build_configs = []
  build_configs.each do |config|
    if plat_list.include?(config[:platform])
      # build the DLL (as grpc_c.*.ruby)
      selected_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 "

  selected_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 = ['3.3.0', '3.2.0', '3.1.0', '3.0.0', '2.7.0'].join(':')
  selected_plat = "#{args[:plat]}"

  # 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', 'x64-mingw-ucrt']
  supported_unix_platforms = ['x86_64-linux', 'x86-linux', 'aarch64-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-msvcrt.ruby', 0)
  File.truncate('grpc_c.64-msvcrt.ruby', 0)
  File.truncate('grpc_c.64-ucrt.ruby', 0)

  `mkdir -p src/ruby/nativedebug/symbols`
  # TODO(apolcyn): make debug symbols work on apple platforms.
  # Currently we hit "objcopy: grpc_c.bundle: file format not recognized"
  # TODO(apolcyn): make debug symbols work on aarch64 linux.
  # Currently we hit "objcopy: Unable to recognise the format of the input file `grpc_c.so'"
  unix_platforms_without_debug_symbols = ['x86_64-darwin', 'arm64-darwin', 'aarch64-linux']

  unix_platforms.each do |plat|
    if unix_platforms_without_debug_symbols.include?(plat)
      debug_symbols_dir = ''
    else
      debug_symbols_dir = File.join(Dir.pwd, 'src/ruby/nativedebug/symbols')
    end
    run_rake_compiler(plat, <<~EOT)
      #{prepare_ccache_cmd} && \
      gem update --system --no-document && \
      bundle && \
      bundle exec rake clean && \
      export GRPC_RUBY_DEBUG_SYMBOLS_OUTPUT_DIR=#{debug_symbols_dir} && \
      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
  # Generate debug symbol packages to complement the native libraries we just built
  unix_platforms.each do |plat|
    unless unix_platforms_without_debug_symbols.include?(plat)
      `bash src/ruby/nativedebug/build_package.sh #{plat}`
      `cp src/ruby/nativedebug/pkg/*.gem pkg/`
    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