# desc "Explaining what the task does"
# task :self-auth-rails do
#   # Task goes here
# end

desc 'Creates the self-auth-rails initializer on your application'
namespace :self_auth_rails do
  task :init do
    # Getting model to be used as authentication
    puts "What model do you want to use for authentication? (Defaults to \"User\")"
    model_name = STDIN.gets.strip
    model_name = 'User' if model_name.empty?

    log 'Generating migrations'
    if Object.const_defined? model_name
      log "#{model_name} already initialized, adding necessary columns"
      system "SKIP_SELF=1 bin/rails g migration add_auth_to_#{model_name.downcase}s selfid:string name:string token:string"
    else
      system "SKIP_SELF=1 bin/rails g model #{model_name.downcase} selfid:string name:string token:string"
    end
    log 'migration file created!'

    # Adding initializer to your application
    log 'Creating self-auth-rails initializer from template'
    body = File.read(__FILE__.gsub('self_auth_rails_tasks.rake', 'initializer.rb.tpl'))
    body.gsub!("{{AuthModel}}", model_name)
    File.open("#{Dir.pwd}/config/initializers/self_auth_rails.rb", 'w') { |file| file << body }
    log 'config/initializers/self_auth_rails.rb created'

    # Adding routes to your application
    puts "What alias do you want to use to mount this rails engine? (Defaults to \"auth\")"
    as = STDIN.gets.strip
    as = 'auth' if as.empty?

    log 'Adding routes to config/routes.rb'
    file_path = "#{Dir.pwd}/config/routes.rb"
    body = File.read(file_path)
    if body.include? 'SelfAuthRails'
      log 'skipping... (self-auth-rails routes already added)'
    else
      pattern = 'Rails.application.routes.draw do'
      content = body.gsub(pattern, "#{pattern}\n  # Mounting self-auth-rails engine\n  mount SelfAuthRails::Engine => \"/auth\", as: \"#{as}\"")
      File.open(file_path, 'w') { |file| file << content }
      log 'self-auth-rails routes added'
    end

    puts 'Adding assets headers'
    assets_file_path = "#{Dir.pwd}/app/views/layouts/application.html.erb"
    body = File.read(assets_file_path)
    header1 = '<%= javascript_include_tag "self-auth-rails/manifest" %>'
    header2 = '<%= stylesheet_link_tag "self-auth-rails/application.css" %>'
    body.gsub!("</head>", "#{header1}\n\t#{header2}\n\t</head>")
    File.open(assets_file_path, 'w') { |file| file << body }
    log 'asset headers set'

    manifest_file_path = "#{Dir.pwd}/app/assets/config/manifest.js"
    body = File.read(manifest_file_path)
    body += "\n//= link self-auth-rails/manifest.js"
    File.open(manifest_file_path, 'w') { |file| file << body }

    log 'All set!'
    puts 'Remember to run `bin/rails db:migrate` to create your authentication table'
  end
end

def log(str)
  str = "[self_auth_rails::init] #{str}"
  puts "\e[#{36}m#{str}\e[0m"
end