#!/usr/bin/env ruby
['fileutils', 'getoptlong', 'yaml'].each do |gemfile|
  require gemfile
end

DEFAULT_UNIX_SOCKET_FILE = '/tmp/teamster.app.sock'
DEFAULT_APP_STATE_FILE   = '/srv/my-site/teamster.app.state'
VERSION = File.read(File.dirname(__FILE__) + '/../VERSION')

class TeamsterApp
  class << self
    def read_options_and_run
      read_options
      run_app
    end

    def read_options
      opts = GetoptLong.new(
        ["--debug",                GetoptLong::NO_ARGUMENT      ],
        ["--version",              GetoptLong::NO_ARGUMENT      ],
        ["--prod",                 GetoptLong::NO_ARGUMENT      ],
        ["--help",                 GetoptLong::NO_ARGUMENT      ],
        ["--overwrite",            GetoptLong::NO_ARGUMENT      ],
        ["--create-module",        GetoptLong::REQUIRED_ARGUMENT],
        ["--socket-file",          GetoptLong::REQUIRED_ARGUMENT],
        ["--state-file",           GetoptLong::REQUIRED_ARGUMENT])
      @config = {}.tap do |hsh|
        opts.each do |opt, arg|
          opt = opt[/--([\w-]+)/, 1].gsub(/-/, "_").to_sym
          arg ||= true
          hsh[opt] = arg
        end
      end
      @config
    end

    def run_app
      if @config[:help]
        quit detailed_usage
      elsif @config[:version]
        quit show_version
      elsif name = @config[:create_module]
        create_module_for name.downcase
      elsif ARGV.size == 1
        command = ARGV.first.to_sym
        send command
      else
        quit usage
      end
    end

    private

    # --{ COMMANDS }-- #

    def init
      current_working_folder = Dir.pwd
      content = File.dirname(__FILE__) + '/../content'
      puts "Initializing Teamster in current folder."
      puts "Creating required content..."
      FileUtils.mkdir_p "conf"
      create_config
      FileUtils.cp_r "#{content}/views", current_working_folder
      FileUtils.cp_r "#{content}/public", current_working_folder
      create_file "config.ru", "config_ru"
      FileUtils.mkdir_p "lib/teamster-modules"
      create_file "lib/teamster-modules.rb", "teamster_modules"
      puts "Teamster initialized!"
      puts "- Run \"teamster --create-module <NAME>\" to create a placeholder module."
      puts "- Run \"teamster start\" to start teamster!"
    end

    def start
      puts "Starting teamster..."
      if File.exists?('conf/teamster.conf')
        if @config[:prod]
          socket_file = @config[:socket_file] || DEFAULT_UNIX_SOCKET_FILE
          state_file  = @config[:state_file] || DEFAULT_APP_STATE_FILE
          Thread.new { exec "puma -d -b unix://#{socket_file} -S #{state_file}" }
        else
          Thread.new { exec "rackup -p 9292" }
        end
      else
        quit "\nERROR: Teamster not initialized!\nUnable to start Teamster. Please initialize first by running \"teamster init\"."
      end
    end

    def stop
      puts "Stopping teamster..."
      state_file  = @config[:state_file] || DEFAULT_APP_STATE_FILE
      if File.exists? state_file
        Thread.new { exec "pumactl -S #{state_file} stop" }
      else
        quit "\nERROR: state file does not exists: #{state_file}\nUnable to stop teamster."
        exit 1
      end
    end

    def restart
      puts "Restarting teamster..."
      state_file  = @config[:state_file] || DEFAULT_APP_STATE_FILE
      if File.exists? state_file
        Thread.new { exec "pumactl -S #{state_file} restart" }
      else
        quit "\nERROR: state file does not exists: #{state_file}\nUnable to restart teamster."
      end
    end

    # --{ HELPERS }-- #

    def quit(msg, code = 0)
      warn msg
      exit code
    end

    def create_config
      ask_user_for :title, "What is your team name"
      File.open('conf/teamster.conf', 'w') {|fh| fh.write @config.to_yaml}
    end

    def personalize_config
      if @config[:title]
      end
    end

    def ask_user_for(opt, question)
      unless @config[opt]
        puts "#{question}: "
        answer = STDIN.gets.chomp
        @config[opt] = answer
      end
    end

    def create_module_for(name)
      puts "Creating placeholders for module #{name}...\n"
      FileUtils.mkdir_p "lib/teamster-modules/#{name}/views"
      create_file "lib/teamster-modules/#{name}.rb", "module_placeholder_for", name
      create_file "lib/teamster-modules/#{name}/#{name}_helper.rb", "module_helper_placeholder_for", name
      create_file "lib/teamster-modules/#{name}/views/#{name}.erb", "view_placeholder_for", name
      create_file "lib/teamster-modules/#{name}/views/#{name}_summary.erb", "view_summary_placeholder_for", name
      puts "\nBasic module creation done!"
      puts "Controller   : \"lib/teamster-modules/#{name}.rb\""
      puts "Helper       : \"lib/teamster-modules/#{name}/#{name}_helper.rb\""
      puts "View         : \"lib/teamster-modules/#{name}/views/#{name}.erb\""
      puts "Summary View : \"lib/teamster-modules/#{name}/views/#{name}_summary.erb\""
    end

    def create_file(filename, method, *args)
      case [File.exists?(filename), !!@config[:overwrite]]
      when [true, false]
        puts "File \"#{filename}\" exists. Run with --overwrite to overwrite file."
      else
        puts "Creating file #{filename}..."
        File.open(filename, "w") {|fh| fh.write(send(method.to_sym, *args))}
      end
    end

    def show_version
      "Current version of teamster: #{VERSION}"
    end

    def usage
      <<-HELP
Initialize application:
  teamster init

Run web application:
  teamster start

Run web application in production (uses unix socket & state file):
  teamster start --prod [--socket-file FILE] [--state-file FILE]

Verify by opening browser and navigating to "http://localhost:9292".

For more detailed help, please run "teamster --help".
      HELP
    end

    def detailed_usage
      <<-DETAIL
Teamster is a simple and extensible web portal for teams.

Current version: #{VERSION}

Usage:
  teamster [COMMAND] [OPTIONS]

Commands:
  init, start, stop, restart

Options (standalone):
  --help                    Display this detailed help.
  --version                 Version of the teamster used.
  --create-module NAME      Creates a stub of a module
  --import-module FILE      << PENDING IMPLEMENTATION >>
  --export-module FILE      << PENDING IMPLEMENTATION >>


Options used with \"start\":
  --prod                    Binds a unix socket to be used by a web
                            server (eg. Nginx) and creates a state file
                            that is used by the Puma app server.
  --socket-file FILE        Relative/absolute path to the UNIX socket file.
  --state-file FILE         Relative/absolute path to the Puma state file.


Options used with \"stop\":
  --socket-file FILE        Relative/absolute path to the UNIX socket file.
  --state-file FILE         Relative/absolute path to the Puma state file.


Options used with \"restart\":
  --socket-file FILE        Relative/absolute path to the UNIX socket file.
  --state-file FILE         Relative/absolute path to the Puma state file.
      DETAIL
    end

    def config_ru
      <<-CODE
require 'teamster'
Dir.glob("lib/*.rb").each {|file| require File.absolute_path(file)}
run Teamster::Core::App
      CODE
    end

    def teamster_modules
      <<-CODE
Dir.glob(File.dirname(__FILE__) + '/teamster-modules/*.rb').each do |mdl|
  require mdl
end
      CODE
    end

    def module_placeholder_for(name)
      <<-CODE
require_relative \"#{name}/#{name}_helper\"

\# NOTE: If the namespace is changed, please take care of the
\#       namespace of the sub-class and helper modules.

module Teamster
  module Modules
    class #{name.capitalize} < Base
      \# Stuff that needs to be done before registration with core.
      has_helpers #{name.capitalize}Helper \# Add modules here (comma separated) if there are helper modules.
      views_at \"\#\{File.dirname(__FILE__)\}/#{name}/views\"
      under_development \# Remove this line when development is finished.

      \# Register this class so it can be used.
      register self

      get '/#{name}/?' do
        erb :#{name}
      end
    end
  end
end
      CODE
    end

    def module_helper_placeholder_for(name)
      <<-CODE
module Teamster
  module Modules
    module #{name.capitalize}Helper
      def #{name}_summary?
        true
      end

      def #{name}_summary
        erb :#{name}_summary
      end
    end
  end
end
      CODE
    end

    def view_placeholder_for(name)
      <<-CODE
<h1 style='text-align: center'>PLACEHOLDER FOR #{name.upcase}</h1>
<p style='text-align: center'>Page under construction. Please check back later!</p>
      CODE
    end

    def view_summary_placeholder_for(name)
      <<-CODE
<p>Under development right now..</p>
      CODE
    end
  end
end

TeamsterApp.read_options_and_run