# -*- coding: utf-8 -*-
require "rake/clean"
require "rake/loaders/makefile"

CC = "g++"
cflags = "-g -O2 -fno-default-inline -Wall -g"

TOPDIR = "."

ldflags = "-DHAVE_CONFIG_H "
ldflags += "-L./test/gtest/gtest-all"

includes = " "
includes += "-I. -I."

# lists of compile dependency objects
TOP_DIR = File.expand_path "."
SRCS = FileList[File.join(TOP_DIR, "src/**/*.cpp"), File.join(TOP_DIR, "lib/**/*.cpp")]
SRCS_ALL = FileList[SRCS, File.join(TOP_DIR, "src/**/*.h"), File.join(TOP_DIR, "lib/**/*.h")]
OBJS = SRCS.ext("o")
DEPS = SRCS.ext("mf")
TEST_SRCS = FileList[File.join(TOP_DIR, "test/*.cpp")]
TEST_OBJECTS = TEST_SRCS.ext("o")
TEST_OBJECTS.include(OBJS)
TEST_DEPS = TEST_SRCS.ext("mf")
TEST_PROGRAMS = TEST_SRCS.ext("")

EXEEXT = ""

# lists of clean objects
CLEAN.include(OBJS, TEST_OBJECTS, DEPS)
CLOBBER.include(TEST_PROGRAMS)

task "default" => ["compile"]
task "test" => ["compile", "test_execute"]

desc "Compile all sources "
task "compile" => OBJS do |t|
end

DEPS.each { |f|
  depname = File.split(f)
  depname[1] = File.basename(depname[1], ".mf") + ".cpp"
  desc "make #{f} dependencies"
  file "#{f}" => [File.join(depname)]
}

DEPS.each { |f| import f}

rule "_test#{EXEEXT}" => TEST_OBJECTS do |t|
  base = File.split(t.name);
  base[1] = File.basename(base[1], EXEEXT) + ".o"
  sh "#{CC} -o #{File.expand_path(t.name)} #{ldflags} #{cflags} #{includes} #{OBJS.join(' ')} ./test/gtest/gtest-all.o #{File.join(base)} "
end

rule '.o' => '.cpp' do |t|
  depname = File.split(t.source)
  depname[1] = File.basename(depname[1], ".cpp") + ".mf"
  sh "#{CC} #{ldflags} #{cflags} #{includes} -c #{t.source} -o #{t.name}"
end

rule '.mf' => '.cpp' do |t|
  depname = File.split(t.source)
  depname[1] = File.basename(depname[1], ".cpp") + ".mf"
  sh "#{CC} -MM -MF #{File.join(depname[0], depname[1])} #{ldflags} #{cflags} #{includes} #{t.source}"
  import File.join(depname[0], depname[1])
end

desc "run all test program in `TEST_PROGRAMS`"
task :test_execute => TEST_PROGRAMS do |t|
  t.prerequisites.each { |f|
    sh "#{f} --gtest_color=yes"
  }
end

# Makefile形式のデータを、複数行から一行形式に変換します。
def replace_make_to_rake(make_base_file, to_file)
  file_data = File.read make_base_file

  file_data = file_data.gsub(/\r\n|\r|\n/, "\n")
  file_data = file_data.gsub(/\\\s+/, " ")
  file_data = file_data.split "\n"
  open(to_file, "a") do |d|
    (file_data.select {|f| !f.empty? }).each { |x| d << x << "\n"}
  end
end