#!/usr/bin/env ruby

require 'rubygems'
require 'bundler/setup'

require 'optparse'
require 'reality/zapwhite'

@verbose = false
@check_only = false
@generate_gitattributes = true
@exclude_patterns = []
@omit_default_excludes = false
@rules = []
@base_directory = Dir.pwd
OptionParser.new do |opts|
  opts.banner = 'Usage: zapwhite [options] directory'

  opts.on('-c', '--check-only', 'Run check and emit messages but do not change files') do
    @check_only = true
  end

  opts.on('-g', '--[no-]generate-gitattributes', 'Generate the .gitattributes file based on files present on filesystem') do |generate_gitattributes|
    @generate_gitattributes = generate_gitattributes
  end

  opts.on('-d', '--directory DIR', 'Base directory of git repository') do |base_directory|
    @base_directory = base_directory
  end

  opts.on('--omit-default-excludes', 'Do not add the default excludes.') do |pattern|
    @omit_default_excludes = true
  end

  opts.on('-e', '--exclude-pattern PATTERN', 'Replace default exclude patterns with pattern(s) specified.') do |pattern|
    @exclude_patterns << pattern
  end

  opts.on('-r', '--rule RULE', 'Additional rule(s) (a.k.a. lines) to add when generating .gitattributes file.') do |rule|
    @rules << rule
  end

  opts.on('-v', '--verbose', 'Print additional information during operation.') do
    @verbose = true
  end
end.parse!

unless ARGV.empty?
  puts "Unhandled options: #{ARGV.inspect}"
  exit -1
end

runner = Reality::Zapwhite.new(File.expand_path(@base_directory))
runner.check_only = @check_only
runner.generate_gitattributes = @generate_gitattributes
runner.additional_gitattribute_rules = @rules
runner.exclude_patterns.clear if @omit_default_excludes

unless @exclude_patterns.empty?
  @exclude_patterns.each do |exclude_pattern|
    runner.exclude_patterns << exclude_pattern
  end
end

if @verbose
  puts "Base Directory: #{@base_directory}"
  puts "Check for violations or fix violations: #{runner.check_only? ? 'check' : 'fix'}"
  puts "Generate .gitattributes file?: #{runner.generate_gitattributes?}"
  unless runner.additional_gitattribute_rules.empty?
    puts 'Additional .gitattribute rules:'
    runner.additional_gitattribute_rules.each do |rule|
      puts " * #{rule}"
    end
  end
  puts "Omit default excludes?: #{@omit_default_excludes}"
  unless runner.exclude_patterns.empty?
    puts 'Exclude patterns:'
    runner.exclude_patterns.each do |pattern|
      puts " * #{pattern}"
    end
  end
end

exit runner.run