require "providers/provider_factory"
require "fileutils"
require "commands/status"
require_relative "request_handler"

module Devops
  module API2_0
    module Handler
      class Script < RequestHandler

        def scripts
          res = []
          Dir.foreach(DevopsConfig.config[:scripts_dir]) {|f| res.push(f) unless f.start_with?(".")}
        end

        def execute_command out, cmd, node_name
          user = @request.env['REMOTE_USER']
          s = ::Devops::Db.connector.server_by_chef_node_name node_name
          ::Devops::Db.connector.check_project_auth s.project, s.deploy_env, user
          cert = ::Devops::Db.connector.key s.key
          addr = "#{s.remote_user}@#{s.public_ip || s.private_ip}"
          ssh_cmd = "ssh -i %s #{addr} '#{cmd}'"
          out << ssh_cmd % File.basename(cert.path)
          out << "\n"
          IO.popen((ssh_cmd % cert.path) + " 2>&1") do |so|
            while line = so.gets do
              out << line
            end
          end
          out << "\nDone"
        end

        def run_script out, file_name, nodes, script_params
            file = File.join(DevopsConfig.config[:scripts_dir], file_name)
            unless File.exists?(file)
              out << "File '#{file_name}' does not exist\n"
              return
            end
            servers = ::Devops::Db.connector.servers_by_names(nodes)
            if servers.empty?
              out << "No servers found for names '#{nodes.join("', '")}'\n"
              return
            end
            user = @request.env['REMOTE_USER']
            servers.each do |s|
              ::Devops::Db.connector.check_project_auth s.project, s.deploy_env, user
            end
            status = []
            servers.each do |s|
              cert = begin
                ::Devops::Db.connector.key s.key
              rescue
                out << "No key found for '#{s.chef_node_name}'"
                status.push 2
                next
              end
              ssh_cmd = "ssh -i #{cert.path} #{s.remote_user}@#{s.public_ip || s.private_ip} 'bash -s' < %s"
              out << "\nRun script on '#{s.chef_node_name}'\n"
              unless script_params.nil?
                ssh_cmd += " " + script_params.join(" ")
              end
              out << (ssh_cmd % [file_name])
              out << "\n"

              begin
                IO.popen( (ssh_cmd % [file]) + " 2>&1") do |so|
                  while line = so.gets do
                    out << line
                  end
                  so.close
                  status.push $?.to_i
                end
              rescue IOError => e
                logger.error e.message
                out << e.message
                status.push 3
              end
            end
            out << create_status(status)
        end

        def create_script file_name
          file = File.join(Devops::Api2.settings.scripts_dir, file_name)
          raise RecordNotFound.new("File '#{file_name}' already exist") if File.exists?(file)
          File.open(file, "w") {|f| f.write(@request.body.read)}
        end

        def delete_script file_name
          file = File.join(Devops::Api2.settings.scripts_dir, file_name)
          raise RecordNotFound.new("File '#{file_name}' does not exist", 404) unless File.exists?(file)
          FileUtils.rm(file)
        end

      end
    end
  end
end