#!/usr/bin/env ruby
require 'entangler'
require 'optparse'
require 'to_regexp'

options = {}
OptionParser.new do |opts|
  opts.banner = %(Entangler v#{Entangler::VERSION}

Usage:
   entangler master <base_dir> <remote_user>@<remote_host>:<remote_base_dir> [options]
   entangler master <base_dir> <other_synced_base_dir> [options])

  opts.separator ''
  opts.separator 'Options:'

  opts.on('-i', "--ignore '.git'", "Ignore path when syncing, string is regex if surrounded by '/'",
          'All paths should be relative to the base sync directory.') do |ignore|
    options[:ignore] ||= []
    options[:ignore] << ignore
  end

  opts.on('-p', '--port PORT', 'Overwrite the SSH port (usually 22)', "(doesn't do anything in slave mode)") do |port|
    options[:port] = port
  end

  opts.on('-v', '--verbose', 'Log Debug lines') do
    options[:verbose] = true
  end

  opts.on_tail('--version', 'Show version number') do
    puts Entangler::VERSION
    exit
  end

  opts.on_tail('-h', '--help', 'Show this message') do
    puts opts
    exit
  end
end.parse!

mode = ARGV.shift
unless mode && %w(master slave).include?(mode)
  puts "Mode unknown, please read help:\nentangler -h"
  exit 1
end

base_dir = ARGV.shift
unless base_dir
  puts 'Missing base directory'
  exit 1
end

if mode == 'master'
  remote_information = ARGV.shift

  unless remote_information
    puts 'Missing destination information'
    exit 1
  end

  user = host = path = error = nil
  remote_mode = false
  if remote_information =~ /[^@]+@[^:]+:.+/
    remote_mode = true
    user, rest = remote_information.split('@', 2)
    host, path = (rest || '').split(':', 2)

    error = 'Missing remote user' unless user
    error = 'Missing remote host' unless host
    error = 'Missing remote path' unless path
  else
    path = remote_information
  end

  unless error.nil?
    puts error
    exit 1
  end

  opts = { remote_base_dir: path, remote_mode: remote_mode }
  if remote_mode
    opts[:remote_user] = user
    opts[:remote_host] = host
  end
  opts[:remote_port] = options[:port] if options[:port]
else
  opts = { mode: 'slave' }
end

if options[:ignore]
  opts[:ignore] = options[:ignore].map do |opt|
    if opt.start_with?('"') && opt.end_with?('"') || opt.start_with?("'") && opt.end_with?("'")
      opt = opt[1..-2]
    end

    if ToRegexp::String.literal? opt
      source, *rest = opt.as_regexp(detect: true)
      ::Regexp.new "^#{source}(?:/[^/]+)*$", *rest
    else
      opt.to_regexp(detect: true)
    end
  end
end

opts[:verbose] = options[:verbose]

Entangler.run(base_dir, opts)