# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# -*- mode: ruby -*-
# vi: set ft=ruby :

require 'socket'

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

enable_dns = false

enable_hostmanager = true
num_zookeepers = 1
num_hosts = 3
ram_megabytes = 1280
base_box = "ubuntu/trusty64"

local_config_file = File.join(File.dirname(__FILE__), "Vagrantfile.local")
if File.exists?(local_config_file) then
  eval(File.read(local_config_file), binding, "Vagrantfile.local")
end

# TODO(ksweeney): RAM requirements are not empirical and can probably be significantly lowered.
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.hostmanager.enabled = enable_hostmanager
  config.hostmanager.manage_host = enable_dns
  config.hostmanager.include_offline = false

  ## Provider-specific global configs
  config.vm.provider :virtualbox do |vb,override|
    override.vm.box = base_box

    override.hostmanager.ignore_private_ip = false

    # Brokers started with the standard script currently set Xms and Xmx to 1G,
    # plus we need some extra head room.
    vb.customize ["modifyvm", :id, "--memory", ram_megabytes.to_s]

    if Vagrant.has_plugin?("vagrant-cachier")
      override.cache.scope = :box
      # Besides the defaults, we use a custom cache to handle the Oracle JDK
      # download, which downloads via wget during an apt install. Because of the
      # way the installer ends up using its cache directory, we need to jump
      # through some hoops instead of just specifying a cache directly -- we
      # share to a temporary location and the provisioning scripts symlink data
      # to the right location.
      override.cache.enable :generic, {
        "oracle-jdk8" => { cache_dir: "/tmp/oracle-jdk8-installer-cache" },
      }
    end
  end

  def name_node(node, name)
    node.vm.hostname = name
    node.vm.provider :aws do |aws|
      aws.tags = { 'Name' => "-" + Socket.gethostname + "-" + name }
    end
  end

  def assign_local_ip(node, ip_address)
    node.vm.provider :virtualbox do |vb,override|
      override.vm.network :private_network, ip: ip_address
    end
  end

  ## Cluster definition
  zookeepers = []
  (1..num_zookeepers).each { |i|
    name = "zk" + i.to_s
    zookeepers.push(name)
    config.vm.define name do |zookeeper|
      name_node(zookeeper, name)
      ip_address = "192.168.50." + (10 + i).to_s
      assign_local_ip(zookeeper, ip_address)
      zookeeper.vm.provision "shell", path: "vagrant/base.sh"
      zookeeper.vm.provision "shell", path: "vagrant/zk.sh", :args => [i.to_s, num_zookeepers]
    end
  }

  (1..num_hosts).each { |i|
    name = "node" + i.to_s
    config.vm.define name do |broker|
      name_node(broker, name)
      ip_address = "192.168.50." + (50 + i).to_s
      assign_local_ip(broker, ip_address)
      # We need to be careful about what we list as the publicly routable
      # address since this is registered in ZK and handed out to clients. If
      # host DNS isn't setup, we shouldn't use hostnames -- IP addresses must be
      # used to support clients running on the host.
      zookeeper_connect = zookeepers.map{ |zk_addr| zk_addr + ":2181"}.join(",")
      broker.vm.provision "shell", path: "vagrant/base.sh"
      broker.vm.provision "shell", path: "vagrant/bk.sh", :args => [i.to_s, enable_dns ? name : ip_address, zookeeper_connect]
    end
  }


end