unless defined? BUILD_DIR;     BUILD_DIR = 'build'; end

unless defined? BUILD_ID;      BUILD_ID = (ENV['BUILD_NUMBER'] ? "build#{ENV['BUILD_NUMBER']}" : "#{Time.now.strftime('%Y%m%d')}"); end

unless defined? ARTIFACTS_DIR; ARTIFACTS_DIR = 'artifacts'; end

unless defined? REPORT_DIR;    REPORT_DIR = 'reports'; end

unless defined? TMP_DIR;       TMP_DIR = 'tmp'; end

unless defined? DEBUG;         DEBUG = nil; end

load BUILD_DIR / 'stx-config.rake' if File.exist?(BUILD_DIR / 'stx-config.rake')

unless defined? PROJECT;       PROJECT = 'stx:jv-branch'; end

# Guess the value of BUILD_TARGET for system on which we're currently 

# running in form of GNU target triplet, such as `x86_64-pc-linux-gnu`.

# Essentially a wrapper for config.guess used with autotools. 

def build_target_guess

  target = `sh config.guess`.chop

  # Workaround for MSYS2 / MINGW environment. When using MSYS2 environment to build 

  # Smalltalk/X, GNU config.guess reports `x86_64-pc-msys` rather than `i686-pc-mingw32`

  # or `x86_64-w64-mingw32` which are the values used by CI and/or third-party libraries. 

  # Therefore we unify the value here (at least for now).

  case target

    when 'x86_64-pc-msys'

      target = 'x86_64-w64-mingw32'

  end  

  # /Workaround

  return target

end

unless defined? BUILD_TARGET; BUILD_TARGET = ENV['BUILD_TARGET'] || build_target_guess; end

# "Guess" the current "branch".

def build_branch_guess()

  repo =  HG::Repository.new('.')

  return repo.bookmark() || repo.branch()

end

BUILD_BRANCH = build_branch_guess()

unless defined? TOOLCHAIN

  if ENV.has_key? 'TOOLCHAIN'

    TOOLCHAIN = ENV['TOOLCHAIN']

  else

    if unix?

      TOOLCHAIN='gcc'

    elsif win32?    

      if /x86_64/ =~ BUILD_TARGET

        TOOLCHAIN='mingw64'

      else

        TOOLCHAIN='mingw32'

      end

    else

      raise Exception.new('Unsupported operating system')

    end

  end

end

unless File.exist? BUILD_DIR / 'stx-config.rake'

  if defined? PROJECT

    mkdir_p BUILD_DIR

    File.open(BUILD_DIR / 'stx-config.rake', 'w') do | f |

      f.puts <<COMMENT

# This file contans a default build configuration. It is created automatically

# when `rake` is called for the very first time. You may still override values

# on command line, i.e., 

#

#     rake PROJECT=some-other-project 

#

# This file SHOULD NOT be checked in a repository. 

#

COMMENT

      f.puts "unless defined? PROJECT; PROJECT='#{PROJECT}'; end"

      f.puts "unless defined? BUILD_TARGET; BUILD_TARGET = '#{BUILD_TARGET}'; end"      

      if defined? PROJECT_DIRS

        f.puts "unless defined? PROJECT_DIRS; PROJECT_DIRS='#{PROJECT_DIRS}'; end"

      end

    end

  end

end

unless defined? PROJECT_DIRS; PROJECT_DIRS = ''; end

case TOOLCHAIN

  when 'gcc'

    OBJ_DIR = '.'

    OBJ_SUFFIX = 'o'

    MAKE='make'

  when 'bcc'

    OBJ_DIR = 'objbc'

    OBJ_SUFFIX = 'obj'

    MAKE='bmake.bat -DUSEBC'

  when 'mingw64'

    if File.exist? 'C:\mingw64\bin'

      ENV['MINGW_DIR'] ='C:\MINGW64'

      ENV['USEMINGW_ARG'] = '-DUSEMINGW64'

    elsif File.exist? 'C:\MSYS64\MINGW64\bin\gcc.exe'

      ENV['MINGW_DIR'] ='C:\MSYS64\MINGW64'

      ENV['USEMINGW_ARG'] = '-DUSEMINGW64'

    else

      raise Exception.new(%q{MINGW64 nor MSYS2 found in C:\MinGW64 nor C:\MSYS64!})

    end

    ENV['MINGW'] = '__MINGW64__'

    OBJ_DIR = 'objmingw'

    OBJ_SUFFIX = 'obj'

    MAKE='mingwmake.bat'

    ENV['PATH'] = "#{ENV['PATH']};#{ENV['MINGW_DIR']}\\bin"

  when 'mingw32'

    if File.exist? 'C:\mingw\bin'

      ENV['MINGW_DIR'] ='C:\MINGW'

      ENV['USEMINGW_ARG'] = '-DUSEMINGW32'

    elsif File.exist? 'C:\MSYS64\MINGW32\bin\gcc.exe'

      ENV['MINGW_DIR'] ='C:\MSYS64\MINGW32'

      ENV['USEMINGW_ARG'] = '-DUSEMINGW32'

      system 'set'

    elsif File.exist? 'C:\MSYS\MINGW32\bin\gcc.exe'

      ENV['MINGW_DIR'] ='C:\MSYS\MINGW32'

      ENV['USEMINGW_ARG'] = '-DUSEMINGW32'

    else

      raise Exception.new(%q{MINGW32 nor MSYS2 found in C:\MinGW nor C:\MSYS64 nor C:\MSYS!})

    end

    ENV['MINGW'] = '__MINGW32__'

    OBJ_DIR = 'objmingw'

    OBJ_SUFFIX = 'obj'

    MAKE='mingwmake.bat'

    ENV['PATH'] = "#{ENV['PATH']};#{ENV['MINGW_DIR']}\\bin"

  else

    raise Exception.new("Unsupported toolchain: #{TOOLCHAIN}")

end

task :setup => %i(setup:pre

                  setup:main

                  setup:post)

task :'setup:pre'

task :'setup:post'

task :'setup:main' => %i(setup:projects setup:project setup:tasks)

task :'setup:projects' do

  Rake::Stx::Configuration.read_specs(PROJECT_DIRS)

end

task :'setup:project' => :'setup:projects' do

  unless defined? PROJECT; error('PROJECT variable not defined!') end

  project! PROJECT.to_sym

  project.apply_imports

  app_name = project.app_name || 'smalltalkx'

  app_version = project.app_version || '8.0.0'

  if not defined? BUILD_NAME; 

    BUILD_NAME = "#{app_name}-#{app_version}_#{BUILD_TARGET}"    

  end  

end

task :'setup:dependencies' => :checkout do

  project.packages.each do |pkg|

    if pkg.name == 'stx:stc' or pkg.name == 'stx:librun' or File.exist? (BUILD_DIR / pkg.directory / pkg.project_definition_file_name)

      unless pkg.test_package?

        task "#{project.application.name}:dependencies" => pkg.name

        task "#{pkg.name}:dependencies" => pkg.prereqs(mandatory: true)

      end

    end

  end

end

task :'setup:tasks' => :'setup:tasks:internal'

task :'setup:tasks:internal' => :'setup:project' do

  project.tasks.each {|t| t.define!}

  # compile task

  project.application ? (task :'compile:application' => project.application.name) : (task :'compile:application')

  info 'Defining tasks for packages...'

  project.packages_and_application.each do |pkg|

    info "Defining task for package #{pkg.name}"

    if unix? #and not File.exist? BUILD_DIR / pkg.directory / 'makefile'    

      task pkg.name => [BUILD_DIR / pkg.directory / 'makefile']

      file BUILD_DIR / pkg.directory / 'makefile' do

        chdir BUILD_DIR / pkg.directory do

          raise Exception.new("Cannot run stmkmf for #{pkg.directory}") unless system "#{pkg.top / 'stx' / 'rules' / 'stmkmf'}"

        end

      end

    end

    #require 'find'

    #[ 'bitmaps', 'resources' ].each do | dir |

    #  path = BUILD_DIR / pkg.directory() / dir

    #  if File.exist?(path)

    #    Find.find(File.expand_path(path)) do | file |

    #      if FileTest.directory?(file)

    #        if (File.basename(file) == '..') || (File.basename(file) == '.')

    #          Find.prune       # Don't look any further into this directory.

    #        else

    #          if File.exists?(File.join(file, '.svn'))

    #            rm_rf File.join(file, '.svn')

    #            #Find.prune

    #          end

    #        end

    #      end

    #    end

    #  end

    #end

    task "#{pkg.name}" => [ :'setup:dependencies' , "#{pkg.name}:dependencies", "#{pkg.name}:pre", "#{pkg.name}:main", "#{pkg.name}:post" ]

    # For Smalltalk class libraries, we have to update VM symbol database

    # if changed...

    if pkg.name != 'stx:stc' && pkg.name != 'stx:librun'

      task "#{pkg.name}" => %w(stx:librun:symbols)

    end

    task "#{pkg.name}:dependencies"

    task "#{pkg.name}:pre"

    task "#{pkg.name}:post"

    task "#{pkg.name}:main" do

      make_vars = ''

      d = win32? ? '-D' : ''

      q = win32? ? '"' : "'"

      (make_vars += "STC=#{STC}") if unix?

      if pkg.application? and !win32?

        liblist=''

        libobjs=''

        link_libobjs=''

        project.packages.each do |p|

          if File.exist? (BUILD_DIR / p.directory / p.project_definition_file_name)

            if !p.application? and p.link and !p.test_package?

              liblist += "#{p.dll_name_without_suffix} "

              libobjs += "#{File.join(pkg.top, p.directory, p.dll_name)} "

              link_libobjs += "#{p.dll_name} "

            end

          end

        end

        make_vars += " #{q}#{d}LIBLIST=#{liblist}#{q}"

        make_vars += " #{q}#{d}LIBOBJS=#{libobjs}#{q}"

        make_vars += " #{q}#{d}LINK_LIBOBJS=#{link_libobjs}#{q}"

      end

      # Update stc flags,

      stc_flags = pkg.stc_flags

      (make_vars += " #{q}#{d}STC_CMD_OPT=#{stc_flags}#{q}") if stc_flags

      (rm BUILD_DIR / pkg.directory / 'GNUmakefile') if File.exist? BUILD_DIR / pkg.directory / 'GNUmakefile'

      info "Compiling #{pkg.name}..."

      make_vars = "#{make_vars} #{DEBUG}"

      chdir BUILD_DIR / pkg.directory do

        if pkg.application? and win32?

          make 'exe'

          make 'RESOURCEFILES'

        else

          if pkg.name == 'stx:stc'

            # Sigh, on UNIX makefile is generated. So if we're using

            # binary stc, we have to recreate it first.

            if unix?

              (sh "'#{STX_TOP_DIR / 'rules' / 'stmkmf'}'") unless File.exist?('makefile')

            end

            make

          elsif pkg.name == 'stx:librun'

             # A workaround for Windows 10 & ancient Borland make which 

            # tend to crash there when trying to recompile already compiled

            # librun. Sigh, we have to move away from it as soon as possible!

            (touch 'stxmain.c') if win32? and File.exist?('stxmain.c')

            make

            if !pkg.application? and win32?                            

              cp 'objmingw' / 'librun.dll',

                 pkg.top /  project.application.directory 

            end

          else

            # Somewhat stupid detection whether we run recent St/X or not

            # ('recent' mean more recent than 3 years or so)

            # TODO: Remove this hack

            if File.exist? BUILD_DIR / 'stx' / 'libbasic2' / 'Makefile.init'

              make "#{make_vars} full"

            else

              make "#{make_vars}"

            end

            # On Windows, copy the DLL application directory

            if !pkg.application? and win32?

              if !uptodate? pkg.top / project.application.directory, [ OBJ_DIR / pkg.dll_name ]

                cp OBJ_DIR / pkg.dll_name, pkg.top /  project.application.directory                

              end

              if !uptodate? pkg.top / project.application.directory, [ OBJ_DIR / "#{pkg.dll_name}.debug" ]

                cp OBJ_DIR / "#{pkg.dll_name}.debug", pkg.top /  project.application.directory                

              end

            end

          end

        end

      end

      if pkg.application? and unix?

        chdir BUILD_DIR / 'stx' / 'librun' do; make; end

      end

    end

    if pkg.application?

      if win32?

        task pkg.name => BUILD_DIR / pkg.directory / 'modules.stx'

        task BUILD_DIR / pkg.directory / 'modules.stx' do |t|

          rm t.name if File.exist? t.name

          File.open(t.name, 'w') do |f|

            project.packages.each do |p|

              if !p.application? and p.link and !p.test_package? and p.name != 'stx:stc' and p.name != 'stx:librun' and File.exist? BUILD_DIR / p.directory / OBJ_DIR / p.dll_name

                f.puts p.dll_name_without_suffix

              end

            end

          end

        end

        project.packages.each do |p|

          if !p.application? and !p.test_package?

            task pkg.name => BUILD_DIR / pkg.directory / p.dll_name

            file BUILD_DIR / pkg.directory / p.dll_name do

              if !p.application? and p.link and !p.test_package? and File.exist? BUILD_DIR / p.directory / OBJ_DIR / p.dll_name

                cp BUILD_DIR / p.directory / OBJ_DIR / p.dll_name,

                   BUILD_DIR / pkg.directory / p.dll_name

              end

            end

          end

          if win32_wine?

            file BUILD_DIR / pkg.directory / p.dll_name do

              cp BUILD_DIR / p.directory / OBJ_DIR / p.dll_name,

                 BUILD_DIR / pkg.directory / p.dll_name

            end

          end

        end

      else # UNIX

        task "#{pkg.name}:main" => BUILD_DIR / pkg.directory / 'modulList.stc'

        task BUILD_DIR / pkg.directory / 'modulList.stc' do |t|

          rm t.name if File.exist? t.name

        end

        task "#{pkg.name}:main" => BUILD_DIR / pkg.directory / 'modulList.c'

        task BUILD_DIR / pkg.directory / 'modulList.c' do |t|

          rm t.name if File.exist? t.name

        end

      end

    end

  end

end