#!/usr/bin/env ruby

require 'optparse'
require 'nephos-server/bin-helpers'

GEMFILE = <<EOF
source 'https://rubygems.org'

gem 'nephos-server'
EOF

ROUTE_RB = <<EOF
#get url: "/", controller: "MainController", method: "root"
#get url: "/add", controller: "MainController", method: "add_url"
#get url: "/rm", controller: "MainController", method: "rm_url"
EOF

def generate_route(verb, url, dest_c, dest_m=nil)
  raise "You are not in a valid application directory" if not Nephos::Bin.is_a_valid_application?
  raise InvalidVerb, "\"#{verb}\" doesn't match with /\w+/" if not verb.to_s.match(/^\w+$/)
  raise InvalidUrl if not url.match(/^\/?(:?\w+)(\/:?\w+)*\/?$/)
  raise "Option dest_m is not avaiable for now" if not dest_m.nil?
  raise "Option dest_c must match with \"controller#method\"" if not dest_c.match(/^\w+\#\w+$/)
  controller = dest_c.split("#")[0]
  method = dest_c.split("#")[1]
  line = "add_route \"#{verb}\", url: \"#{url}\", controller: \"#{controller}\", method: \"#{method}\""
  File.open("routes.rb", "a") do |f|
    f.puts line
  end
end

def generate_controller(name, file)
  raise "You are not in a valid application directory" if not Nephos::Bin.is_a_valid_application?
  if File.exists? file
    print "The file #{file} already exists. Are you sure to erase it ? (y/N)"
    r = STDIN.gets.to_s.chomp
    raise "File #{file} already exists" unless r.match(/y(es)?/)
  end
  f = File.open(file, 'w')
  f << <<EOF
class #{name} < Nephos::Controller
  def root
    return {plain: "index"}
  end
end
EOF
  puts "Controller \"#{name}\" created at location \"#{file}\""
end

def create_application_dir dir
  raise "Directory #{dir} already exists" if Dir.exists? dir
  Dir.mkdir dir
end

def move_to_application_dir dir
  Dir.chdir dir
end

def initialize_application
  raise "Not an empty dir" unless Dir[File.expand_path "*"].empty?
  File.write "routes.rb", ROUTE_RB
  File.write "Gemfile", GEMFILE
  Dir.mkdir "app"
  begin
    `git init .`
    puts "Git repository initialized"
  rescue Errno::ENOENT => err
    puts "Warning: git repository not initialized"
  rescue => err
    puts "Error: #{err.message}"
  end
  exec("bundle install")
end

begin
  OptionParser.new do |opts|
    opts.banner = "Usage: nephos-generator [controller name] [appli [name]]"
  end.parse!

  case ARGV[0]
  when "c", "controller"
    if ARGV[1].to_s.match(/[\w\-\.]+/)
      generate_controller("#{ARGV[1].capitalize}Controller", "app/#{ARGV[1].downcase}.rb")
    else
      puts "error"
    end
  when "a", "appli", "application"
    if not ARGV[1].to_s.empty?
      create_application_dir(ARGV[1])
      puts "Application #{ARGV[1]} created"
      move_to_application_dir(ARGV[1])
    end
    initialize_application
    puts "Application initialized"
  when "r", "route"
    generate_route(*(ARGV[1..4]))
  else
    puts "\"#{ARGV[0]}\" not recognized has a command"
  end

rescue => err
  puts "Error: #{err.message}"
end