#!/usr/bin/env ruby

require 'word_wrap'
require 'pathname'
require 'optparse'
require 'natour'

config = Natour::Config.load_file(
  Pathname($PROGRAM_NAME).basename.sub_ext('.yml'),
  default: {
    'out-dir' => nil,
    'out-file' => nil,
    'overwrite' => false,
    'track-formats' => %i[gpx fit],
    'map' => true,
    'map-layers' => [],
    'adoc-author' => nil,
    'backend' => 'pdf',
    'draft' => false,
    'image-maxdim' => 1800
  }
)

option_parser = OptionParser.new do |opts|
  opts.banner = "Usage: #{Pathname($PROGRAM_NAME).basename('.*')} [OPTIONS]... PATH"
  opts.separator('')
  opts.separator(WordWrap.ww(
    'If PATH refers to a directory, one or more reports are created in ' \
    'AsciiDoc format. GPS tracks, images and species lists (Kosmos ' \
    'Vogelführer, Flora Helvetica, Info Flora Online-Feldbuch) are ' \
    'included. Images of the map section covered by the GPS tracks are also ' \
    'created and included. If PATH refers to an AsciiDoc file, it is ' \
    'converted to PDF (or any other supported format).'
  ))
  opts.separator('')
  opts.separator('General:')
  opts.on('-h', '--help', 'Display this help screen') do
    $stdout.puts(opts)
    exit
  end
  opts.on('-d', '--out-dir DIR', 'Output directory') do |value|
    config['out-dir'] = value
  end
  opts.on('-f', '--out-file FILE', 'Output filename') do |value|
    config['out-file'] = value
  end
  opts.on('--[no-]overwrite', 'Overwrite existing files') do |value|
    config['overwrite'] = value
  end
  opts.separator('')
  opts.separator('Creation:')
  opts.on('--track-formats FORMATS', Array, 'GPS track formats (gpx, fit') do |value|
    config['track-formats'] = value.map(&:to_sym)
  end
  opts.on('--[no-]map', 'Create map images') do |value|
    config['map'] = value
  end
  opts.on('--map-layers LAYERS', Array, 'Add additional layers to map images') do |value|
    config['map-layers'] = value
  end
  opts.on('--adoc-author AUTHOR', 'AsciiDoc author (name <email>[; name2 <email2>...])') do |value|
    config['adoc-author'] = value
  end
  opts.separator('')
  opts.separator('Conversion:')
  opts.on('-b', '--backend BACKEND', 'Conversion backend (pdf, html5 ...)') do |value|
    config['backend'] = value
  end
  opts.on('--[no-]draft', 'Show additional information (e.g. image paths)') do |value|
    config['draft'] = value
  end
  opts.on('--image-maxdim DIM', 'Shrink oversized images (PDF only)') do |value|
    config['image-maxdim'] = value.to_i
  end
end

begin
  option_parser.parse!
rescue OptionParser::InvalidArgument,
       OptionParser::InvalidOption => e
  abort("Error: #{e}")
end

abort('Error: wrong number of arguments') if ARGV.length != 1

path = Pathname(ARGV[0].encode('utf-8')
                       .delete_suffix('"')
                       .gsub('\\', '/'))

if path.directory?
  Natour.create(
    path,
    out_dir: config['out-dir'],
    out_file: config['out-file'],
    overwrite: config['overwrite'],
    track_formats: config['track-formats'],
    create_map: config['map'],
    map_layers: config['map-layers'],
    adoc_author: config['adoc-author']
  )
else
  Natour.convert(
    path,
    out_dir: config['out-dir'],
    out_file: config['out-file'],
    overwrite: config['overwrite'],
    backend: config['backend'],
    draft: config['draft'],
    image_maxdim: config['image-maxdim']
  )
end