ENV['VAGRANT_NO_PARALLEL'] = 'no'
NODE_ROLES = (ENV['E2E_NODE_ROLES'] ||
  ["server-etcd-0", "server-cp-0", "server-cp-1", "agent-0"])
NODE_BOXES = (ENV['E2E_NODE_BOXES'] ||
  ['generic/ubuntu2004', 'generic/ubuntu2004', 'generic/ubuntu2004', 'generic/ubuntu2004', 'generic/ubuntu2004'])
GITHUB_BRANCH = (ENV['E2E_GITHUB_BRANCH'] || "master")
RELEASE_VERSION = (ENV['E2E_RELEASE_VERSION'] || "")
NODE_CPUS = (ENV['E2E_NODE_CPUS'] || 2).to_i
NODE_MEMORY = (ENV['E2E_NODE_MEMORY'] || 1024).to_i
# Virtualbox >= 6.1.28 require `/etc/vbox/network.conf` for expanded private networks 
NETWORK_PREFIX = "10.10.10"

def installType(vm)
  if RELEASE_VERSION == "skip"
    return "INSTALL_K3S_SKIP_DOWNLOAD=true"
  elsif !RELEASE_VERSION.empty?
    return "INSTALL_K3S_VERSION=#{RELEASE_VERSION}"
  end
  # Grabs the last 5 commit SHA's from the given branch, then purges any commits that do not have a passing CI build
  # MicroOS requires it not be in a /tmp/ or other root system folder
  scripts_location = Dir.exists?("./scripts") ? "./scripts" : "../scripts" 
  vm.provision "Acquire latest commit", type: "shell", path: scripts_location + "/latest_commit.sh", args: [GITHUB_BRANCH, "/home/vagrant/k3s_commits"]
  return "INSTALL_K3S_COMMIT=$(head\ -n\ 1\ /home/vagrant/k3s_commits)"
end

def provision(vm, role, role_num, node_num)
  vm.box = NODE_BOXES[node_num]
  vm.hostname = role
  # An expanded netmask is required to allow VM<-->VM communication, virtualbox defaults to /32
  vm.network "private_network", ip: "#{NETWORK_PREFIX}.#{100+node_num}", netmask: "255.255.255.0"

  vagrant_defaults = File.exists?("./vagrantdefaults.rb") ? "./vagrantdefaults.rb" : "../vagrantdefaults.rb"
  load vagrant_defaults

  defaultOSConfigure(vm)
  
  install_type = installType(vm)
  vm.provision "ping k3s.io", type: "shell", inline: "ping -c 2 k3s.io"
  
  if node_num == 0 && !role.include?("server") && !role.include?("etcd")
    puts "first node must be a etcd server"
    abort
  elsif role.include?("server") && role.include?("etcd") && role_num == 0
    vm.provision 'k3s-install', type: 'k3s', run: 'once' do |k3s|
      k3s.args = "server"
      k3s.config = <<~YAML
        cluster-init: true
        node-external-ip: #{NETWORK_PREFIX}.100
        flannel-iface: eth1
        disable-apiserver: true
        disable-controller-manager: true
        disable-scheduler: true
        node-taint:
          - node-role.kubernetes.io/etcd:NoExecute
      YAML
      k3s.env = %W[K3S_KUBECONFIG_MODE=0644 K3S_TOKEN=vagrant #{install_type}]
      k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
    end
  elsif role.include?("server") && role.include?("etcd") && role_num != 0
    vm.provision 'k3s-install', type: 'k3s', run: 'once' do |k3s|
      k3s.args = "server"
      k3s.config = <<~YAML
        server: https://#{NETWORK_PREFIX}.100:6443
        flannel-iface: eth1
        disable-apiserver: true
        disable-controller-manager: true
        disable-scheduler: true
        node-taint:
          - node-role.kubernetes.io/etcd:NoExecute
          
      YAML
      k3s.env = %W[K3S_KUBECONFIG_MODE=0644 K3S_TOKEN=vagrant #{install_type}]
      k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
    end
  elsif role.include?("server") && role.include?("cp")
    vm.provision 'k3s-install', type: 'k3s', run: 'once' do |k3s|
      k3s.args = "server"
      k3s.config = <<~YAML
        server: https://#{NETWORK_PREFIX}.100:6443
        flannel-iface: eth1
        disable-etcd: true
        node-taint:
          - node-role.kubernetes.io/control-plane:NoSchedule
      YAML
      k3s.env = %W[K3S_KUBECONFIG_MODE=0644 K3S_TOKEN=vagrant #{install_type}]
      k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
    end
  elsif role.include?("server") && role.include?("all")
    vm.provision 'k3s-install', type: 'k3s', run: 'once' do |k3s|
      k3s.args = "server"
      k3s.config = <<~YAML
        server: https://#{NETWORK_PREFIX}.100:6443
        flannel-iface: eth1
      YAML
      k3s.env = %W[K3S_KUBECONFIG_MODE=0644 K3S_TOKEN=vagrant #{install_type}]
      k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
    end
  end
  if role.include?("agent")
    vm.provision 'k3s-install', type: 'k3s', run: 'once' do |k3s|
      k3s.args = %W[agent --server https://#{NETWORK_PREFIX}.101:6443 --flannel-iface=eth1]
      k3s.env = %W[K3S_KUBECONFIG_MODE=0644 K3S_TOKEN=vagrant #{install_type}]
      k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
    end
  end
  if vm.box.to_s.include?("microos")
    vm.provision 'k3s-reload', type: 'reload', run: 'once'
  end
end

Vagrant.configure("2") do |config|
  config.vagrant.plugins = ["vagrant-k3s", "vagrant-reload"]
  # Default provider is libvirt, virtualbox is only provided as a backup
  config.vm.provider "libvirt" do |v|
    v.cpus = NODE_CPUS
    v.memory = NODE_MEMORY
  end
  config.vm.provider "virtualbox" do |v|
    v.cpus = NODE_CPUS
    v.memory = NODE_MEMORY
  end
  
  if NODE_ROLES.kind_of?(String)
    NODE_ROLES = NODE_ROLES.split(" ", -1)
  end
  if NODE_BOXES.kind_of?(String)
    NODE_BOXES = NODE_BOXES.split(" ", -1)
  end

  # Must iterate on the index, vagrant does not understand iterating 
  # over the node roles themselves
  NODE_ROLES.length.times do |i|
    name = NODE_ROLES[i]
    role_num = name.split("-", -1).pop.to_i
    config.vm.define name do |node|
      provision(node.vm, name, role_num, i)
    end
  end
end