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

module Devops
  module Version2_0
    module Handler
      class Script

        def self.get_scripts
          lambda {
            check_privileges("script", "r")
            res = []
            Dir.foreach(DevopsService.config[:scripts_dir]) {|f| res.push(f) unless f.start_with?(".")}
            json res
          }
        end

        def self.execute_command
          lambda {
            check_privileges("script", "x")
            user = request.env['REMOTE_USER']
            s = ::Devops::Db.connector.server_by_chef_node_name params[:node_name]
            ::Devops::Db.connector.check_project_auth s.project, s.deploy_env, user
            cert = ::Devops::Db.connector.key s.key
            cmd = request.body.read
            addr = "#{s.remote_user}@#{s.public_ip || s.private_ip}"
            ssh_cmd = "ssh -i %s #{addr} '#{cmd}'"
            stream() do |out|
              begin
                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"
              rescue IOError => e
                logger.error e.message
              end
            end
          }
        end

        def self.run_script
          lambda {
            check_privileges("script", "x")
            file_name = params[:script_name]
            @file = File.join(DevopsService.config[:scripts_dir], check_filename(file_name, "Parameter 'script_name' must be a not empty string", false))
            halt(404, "File '#{file_name}' does not exist") unless File.exists?(@file)
            body = create_object_from_json_body
            nodes = check_array(body["nodes"], "Parameter 'nodes' must be a not empty array of strings")
            p = check_array(body["params"], "Parameter 'params' should be a not empty array of strings", String, true)
            servers = ::Devops::Db.connector.servers_by_names(nodes)
            return [404, "No servers found for names '#{nodes.join("', '")}'"] if servers.empty?
            user = request.env['REMOTE_USER']
            servers.each do |s|
              ::Devops::Db.connector.check_project_auth s.project, s.deploy_env, user
            end
            stream() do |out|
              begin
                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 p.nil?
                    ssh_cmd += " " + p.join(" ")
                  end
                  out << (ssh_cmd % [params[:script_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)
              rescue IOError => e
                logger.error e.message
              end
            end
          }
        end

        def self.create_script
          lambda {
            check_privileges("script", "w")
            file_name = params[:script_name]
            file = File.join(settings.scripts_dir, check_filename(file_name, "Parameter 'script_name' must be a not empty string"))
            halt_response("File '#{file_name}' already exist") if File.exists?(file)
            File.open(file, "w") {|f| f.write(request.body.read)}
            create_response("File '#{params[:script_name]}' created", nil, 201)
          }
        end

        def self.delete_script
          lambda {
            check_privileges("script", "w")
            file_name = params[:script_name]
            file = File.join(settings.scripts_dir, check_filename(file_name, "Parameter 'script_name' must be a not empty string"))
            halt_response("File '#{file_name}' does not exist", 404) unless File.exists?(file)
            FileUtils.rm(file)
            create_response("File '#{params[:script_name]}' deleted")
          }
        end
      end
    end
  end
end