require 'fileutils'
require 'rake/clean'

BOOK = 'syntax-book'
BOOK_PDF = BOOK + '.pdf'
BOOK_EPUB = BOOK + '.epub'
CONFIG_FILE = 'config.yml'
WEBROOT = 'webroot'

def build(mode, chapter)
  sh "review-compile --target=#{mode} --footnotetext --stylesheet=style.css #{chapter} > tmp"
  mode_ext = { 'html' => 'html', 'latex' => 'tex', 'idgxml' => 'xml' }
  FileUtils.mv 'tmp', chapter.gsub(/re\z/, mode_ext[mode])
end

def build_all(mode)
  sh "review-compile --target=#{mode} --footnotetext --stylesheet=style.css"
end

task default: :html_all

desc 'build html (Usage: rake build re=target.re)'
task :html do
  if ENV['re'].nil?
    puts 'Usage: rake build re=target.re'
    exit
  end
  build('html', ENV['re'])
end

desc 'build all html'
task :html_all do
  build_all('html')
end

desc 'preproc all'
task :preproc do
  Dir.glob('*.re').each do |file|
    sh "review-preproc --replace #{file}"
  end
end

desc 'generate PDF and EPUB file'
task all: %i[pdf epub]

desc 'generate PDF file'
task pdf: BOOK_PDF

desc 'generate stagic HTML file for web'
task web: WEBROOT

desc 'generate EPUB file'
task epub: BOOK_EPUB

SRC = FileList['*.re'] + [CONFIG_FILE]

file BOOK_PDF => SRC do
  FileUtils.rm_rf [BOOK_PDF, BOOK, BOOK + '-pdf']
  sh "review-pdfmaker #{CONFIG_FILE}"
end

file BOOK_EPUB => SRC do
  FileUtils.rm_rf [BOOK_EPUB, BOOK, BOOK + '-epub']
  sh "review-epubmaker #{CONFIG_FILE}"
end

file WEBROOT => SRC do
  FileUtils.rm_rf [WEBROOT]
  sh "review-webmaker #{CONFIG_FILE}"
end

CLEAN.include([BOOK, BOOK_PDF, BOOK_EPUB, BOOK + '-pdf', BOOK + '-epub', WEBROOT])