require 'open3'

module Smartcloud
	module Grids
		class Buildpacker < Smartcloud::Base
			def initialize
			end

			def pack
				set_logger_formatter_arrow

				pack_rails if File.exist? "bin/rails"

				logger.error "Could not continue ... Launch Failed."
				logger.formatter = nil
				exit 1
			end

			def pack_rails
				return unless bundle_install?
				return unless precompile_assets?
				return unless start_web_server?

				exit 0
			end

			# Perform bundle install			
			def bundle_install?
				logger.info ""
				logger.info "Performing bundle install ..."

				set_logger_formatter_tabs
				exit_status = nil
				Open3.popen2e("bundle", "install", "--deployment", "--clean") do |stdin, stdout_and_stderr, wait_thr|
					stdout_and_stderr.each { |line| logger.info "#{line}" }
					exit_status = wait_thr.value.success?
				end
				set_logger_formatter_arrow

				if exit_status
					return true
				else
					logger.error "Could not complete bundle install."
					return false
				end
			end
			
			# Perform pre-compiling of assets
			def precompile_assets?
				logger.info ""
				logger.info "Installing Javascript dependencies & pre-compiling assets ..."

				set_logger_formatter_tabs
				exit_status = nil
				Open3.popen2e("bundle", "exec", "rails", "assets:precompile") do |stdin, stdout_and_stderr, wait_thr|
					stdout_and_stderr.each { |line| logger.info "#{line}" }
					exit_status = wait_thr.value.success?
				end
				set_logger_formatter_arrow

				if exit_status
					return true
				else
					logger.error "Could not install Javascript dependencies or pre-compile assets."
					return false
				end
			end
			
			# Perform starting of web server
			def start_web_server?
				logger.debug ""
				logger.debug "Starting Web Server ..."

				# Remove server.pid if it exists
				FileUtils.rm("tmp/pids/server.pid") if File.exist? "tmp/pids/server.pid"

				# if system("god -c Godfile -D")
					logger.info ""
					logger.info "Launched Application ... Success."
					# return true
				# end
				return false
			end
			
			def set_logger_formatter_arrow
				logger.formatter = proc do |severity, datetime, progname, message|
					severity_text = (severity == 'INFO') ? "" : "#{severity}: "

					SYMBOL_DEBUG = "\u{1f527}"
					SYMBOL_INFO = "\u{1f604}"
					SYMBOL_WARN = "\u{2753}"
					SYMBOL_ERROR, SYMBOL_FATAL = "\u{274c}"
					symbol_text = (message == "") ? "" : Object.const_get("SYMBOL_#{severity}")

					"\t\t\t\t#{symbol_text} #{severity_text}#{message}\n"
				end
			end
			
			def set_logger_formatter_tabs
				logger.formatter = proc do |severity, datetime, progname, message|
					"\t\t\t\t       #{message}"
				end
			end
		end
	end
end