#!/usr/bin/env ruby
# Copyright (c) 2023 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

STDOUT.sync = true

require 'slop'
require 'loog'
require 'backtrace'
require_relative '../lib/damsi/version'
require_relative '../lib/damsi/dfg'

loog = Loog::REGULAR

def config(path)
  f = File.expand_path(path)
  args = []
  args += File.readlines(f).map(&:strip).reject { |a| a.empty? } if File.exist?(f)
  args
end

args = config('~/.damsi') + config('.damsi') + ARGV

opts = Slop.parse(args, strict: true, help: true) do |o|
  o.banner = "Usage (#{Damsi::VERSION}): damsi [options] <file>"
  o.bool '-h', '--help', 'Show these instructions'
  o.bool '--version', 'Show current version'
end

if opts.help?
  puts opts
  exit
end

if opts.version?
  loog.info(Damsi::VERSION)
  exit
end

tex = Class.new do
  def info(msg)
    puts msg
  end
  def debug(msg)
    puts '% ' + msg
  end
end.new

Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8

begin
  input = opts.arguments[0]
  raise 'File name is required' if input.nil?
  Damsi::DFG.new(File.read(input)).simulate(tex)
rescue StandardError => e
  loog.error(Backtrace.new(e))
  exit -1
end