#!/usr/bin/env ruby
# frozen_string_literal: true

require 'pathname'
require 'optparse'
require 'objspace'
require 'find'

$LOAD_PATH.unshift File.expand_path('../lib', __dir__)
require 'ruby_minimum_version'

quiet = false
verbose = false

parser = OptionParser.new
parser.banner.concat(' [filename ...]')
parser.version = RubyMinimumVersion::VERSION
parser.on('--quiet') { quiet = true }
parser.on('--verbose') { verbose = true }
parser.parse!

quiet or $stderr.print 'Searching for Ruby files...'

filenames = ARGV.flat_map do |file|
  File.file?(file) ? file : Find.find(file).select { |file| File.file?(file) && !file.end_with?('~') }
end

quiet or warn " found #{filenames.count} file(s)\n"

filenames.each do |filename|
  filename = File.expand_path(filename)
  filename_in_log = Pathname(filename).relative_path_from(Dir.pwd)

  unless File.file?(filename)
    warn "No such file #{filename_in_log}"
    exit 1
  end

  unless quiet
    if verbose
      warn "Scanning #{filename_in_log}..."
    else
      $stderr.print "Scanning #{filename_in_log}..."
    end
  end
  version = RubyMinimumVersion.new(filename, verbose: verbose).minimum_version

  unless quiet
    if verbose
      warn 'Scanning done'
    else
      warn ' done'
    end
  end

  if filenames.count >= 2
    puts "#{filename_in_log}: #{version}"
  else
    puts version
  end
end