# Copyright, 2017, by Samuel G. D. Williams. <http://www.codeotaku.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

require 'guard/compat/plugin'

require 'rack/builder'
require 'rack/server'

require 'async/container'
require "falcon/server"

module Guard
	class Falcon < Plugin
		attr_reader :options, :runner

		def self.default_env
			ENV.fetch('RACK_ENV', 'development')
		end

		DEFAULT_OPTIONS = {
			:bind => "tcp://localhost:9000",
			:environment => default_env,
			:config => 'config.ru',
		}

		def initialize(**options)
			super
			
			@options = DEFAULT_OPTIONS.merge(options)
			@container = nil
		end

		def run_server
			app, options = Rack::Builder.parse_file(@options[:config])
			
			UI.info("Starting HTTP server on #{@options[:bind]}.")
			
			Async::Container::Threaded.new(concurrency: 2) do
				server = ::Falcon::Server.new(app, [
					Async::IO::Address.parse(@options[:bind], reuse_port: true)
				])
				
				server.run
			end
		rescue
			
			return nil
		end

		def start
			@container = run_server
		end

		def reload
			stop
			start
		end

		def stop
			@container.stop
			@container = nil
		end

		def run_on_change(paths)
			reload
		end
	end
end