#!/usr/bin/env ruby
#
# Copyright (c) 2013-2017 Masanori Kado, Masayoshi Takahashi, Kenshi Muto
#
# This program is free software.
# You can distribute or modify this program under the terms of
# the GNU LGPL, Lesser General Public License version 2.1.
# For details of the GNU LGPL, see the file "COPYING".

require 'fileutils'
require 'optparse'

require 'pathname'

bindir = Pathname.new(__FILE__).realpath.dirname
$LOAD_PATH.unshift((bindir + '../lib').realpath)

require 'review'

def main
  @logger = ReVIEW.logger
  opts = OptionParser.new
  opts.version = ReVIEW::VERSION
  opts.banner = "Usage: #{File.basename($PROGRAM_NAME)} [option] dirname"
  opts.on('-h', '--help', 'print this message and quit.') do
    puts opts.help
    exit 0
  end
  opts.on('-f', '--force', 'generate files (except *.re) if directory has already existed.') { @force = true }
  opts.on('-l', '--locale', 'generate locale.yml file.') { @locale = true }
  opts.on('', '--epub-version VERSION', 'define EPUB version') { |version| @epub_version = version }
  opts.on('', '--without-doc', "don't generate doc files") { @without_doc = true }
  begin
    opts.parse!
  rescue OptionParser::ParseError => err
    @logger.error err.message
    $stderr.puts opts.help
    exit 1
  end

  if ARGV.empty?
    $stderr.puts opts.help
    exit 1
  end

  initdir = File.expand_path(ARGV.shift)
  @review_dir = File.dirname(File.expand_path(__FILE__ + './../'))

  generate_dir(initdir) do |dir|
    generate_catalog_file(dir)
    generate_sample(dir)
    generate_images_dir(dir)
    generate_cover_image(dir)
    generate_layout(dir)
    generate_style(dir)
    generate_texmacro(dir)
    generate_config(dir)
    generate_locale(dir) if @locale
    generate_rakefile(dir)
    generate_gemfile(dir)
    generate_doc(dir) unless @without_doc
  end
end

def generate_dir(dir)
  if File.exist?(dir) && !@force
    @logger.error "#{dir} already exists."
    exit
  end
  FileUtils.mkdir_p dir
  yield dir
end

def generate_sample(dir)
  File.open("#{dir}/#{File.basename(dir)}.re", 'w') { |file| file.write('= ') } unless @force
end

def generate_layout(dir)
  FileUtils.mkdir_p dir + '/layouts'
end

def generate_catalog_file(dir)
  File.open(dir + '/catalog.yml', 'w') do |file|
    file.write <<-EOS
PREDEF:

CHAPS:
  - #{File.basename(dir)}.re

APPENDIX:

POSTDEF:

EOS
  end
end

def generate_images_dir(dir)
  FileUtils.mkdir_p dir + '/images'
end

def generate_cover_image(dir)
  FileUtils.cp @review_dir + '/test/sample-book/src/images/cover.jpg', dir + '/images/'
end

def generate_config(dir)
  today = Time.now.strftime('%Y-%m-%d')
  content = File.read(@review_dir + '/doc/config.yml.sample', encoding: 'utf-8')
  content.gsub!(/^#\s*coverimage:.*$/, 'coverimage: cover.jpg')
  content.gsub!(/^#\s*date:.*$/, "date: #{today}")
  content.gsub!(/^#\s*history:.*$/, %Q(history: [["#{today}"]]))
  content.gsub!(/^#\s*texstyle:.*$/, 'texstyle: reviewmacro')
  content.gsub!(/^(#\s*)?stylesheet:.*$/, %Q(stylesheet: ["style.css"]))
  if @epub_version.to_i == 2
    content.gsub!(/^#.*epubversion:.*$/, 'epubversion: 2')
    content.gsub!(/^#.*htmlversion:.*$/, 'htmlversion: 4')
  end
  File.open(File.join(dir, 'config.yml'), 'w') { |f| f.write(content) }
end

def generate_style(dir)
  FileUtils.cp @review_dir + '/test/sample-book/src/style.css', dir
end

def generate_texmacro(dir)
  texmacrodir = dir + '/sty'
  FileUtils.mkdir_p texmacrodir
  FileUtils.cp [
    @review_dir + '/test/sample-book/src/sty/reviewmacro.sty',
    @review_dir + '/test/sample-book/src/sty/jumoline.sty'
  ], texmacrodir
end

def generate_rakefile(dir)
  FileUtils.mkdir_p dir + '/lib/tasks'

  File.open(dir + '/Rakefile', 'w') do |file|
    file.write <<-EOS
Dir.glob('lib/tasks/*.rake').each do |file|
  load(file)
end
EOS
  end

  FileUtils.cp @review_dir + '/test/sample-book/src/Rakefile',
               dir + '/lib/tasks/review.rake'
end

def generate_locale(dir)
  FileUtils.cp @review_dir + '/lib/review/i18n.yml', dir + '/locale.yml'
end

def generate_gemfile(dir)
  File.open(dir + '/Gemfile', 'w') do |file|
    file.write <<-EOS
source 'https://rubygems.org'

gem 'rake'
gem 'review', '#{ReVIEW::VERSION}'
EOS
  end
end

def generate_doc(dir)
  docdir = dir + '/doc'
  FileUtils.mkdir_p docdir
  md_files = Dir.glob(@review_dir + '/doc/*.md').map.to_a
  FileUtils.cp md_files, docdir
end

main if File.basename($PROGRAM_NAME) == File.basename(__FILE__)