#!/bin/bash
# This script deploys n test VMs into a vnet, and optionally, you can make it deploy into TiP session.

COLOR_BLU='\033[0;34m'
COLOR_CLR='\033[0m'
COLOR_RED_BLD='\033[1;31m'
function var_default_val () { eval "[[ -z \$$1 ]]" && export "$1=$2" ;echo -ne "$COLOR_BLU"; eval "echo \"  >> $1 = \$$1\"" ;echo -ne "$COLOR_CLR"; }

location="$1"
vmcount="$2"
tipid="$3"
cluster="$4"

# D/E_v5 for OVL, D/E_v4 for non-ovl. Refer to Azure doc for more details.
var_default_val vmsize              Standard_E2_v5
var_default_val vnet_ipv6           0
var_default_val vnet_enc            0
var_default_val accelnet            1

# If set to n: First n VMs will be deployed into TiP (if provided TiP session), and TiP session would be ignored for the rest VMs.
var_default_val only_n_vms_in_tip   999

var_default_val prefix              $(short=1 today || echo zz)$(head -c6 /dev/urandom | base64 -w0 | tr -d =/+)
var_default_val resgrp              rshgrp-$prefix
var_default_val vmname              $prefix-vm
var_default_val avname              $vmname-av
var_default_val vnetname            $vmname-vnet

var_default_val vmimg               Ubuntu2204

# Path to an executable (usually bash script) to upload & run on VM creation. Don't forget your shebang!
var_default_val vmsetup_exec

var_default_val plugin_dir          "$(dirname "$0")/azvm-plugins"
var_default_val plugins
var_default_val dryrun              0

######## Configuration END #########################################

function plugin_hook () {
  for p in $plugins; do
    source "$plugin_dir/$p"
    if declare -f "$1" > /dev/null; then
      "$1" ; unset -f "$1"
    fi
  done
}

if [ "$vmcount" = "" ]; then
    echo "
azvm-deploy.sh v2505.1
This script deploys n test VMs into a vnet, and optionally, you can make it deploy into TiP session.
Usage: $0 <location> <vmcount> [tipid] [cluster]
Example: $0 eastus2 2
         $0 eastus2 2 11111111-2222-3333-4444-555555555555 AAA01BbbCcc02

Optionally, you can override some variables by setting corresponding env. For example:
         resgrp=mygrp vmsize=Standard_D2_v3 $0 eastus2 2 ...
         prefix=t0704 plugins=secured vnet_enc=1 only_n_vms_in_tip=1 $0 eastus2 2 ...
Optional variables (read script for help):
$(grep '^var' $0 | sed 's/^/  /')

Set 'plugins' variable to see plugin-specific help. Available plugins:
$(ls -m $plugin_dir)

Use plugins like this:
  plugins=secured $0 eastus2 1
  plugins='secured slb' resgrp=mygrp $0 eastus2 2
  plugins='*' $0
"
    plugin_hook plugin_help
    exit 1
fi

vm_create_xtra_arg=()
vm_create_xtra_arg_first_n=()
vnet_create_xtra_arg=()
explicit_vnet_create=0

[ "$vnet_enc"       = 1 ] && vnet_create_xtra_arg+=(--enable-encryption true --encryption-enforcement-policy allowUnencrypted) && explicit_vnet_create=1
[ "$accelnet"       = 1 ] && vm_create_xtra_arg+=(--accelerated-networking true)
[ "$vmsetup_exec" != "" ] && vm_create_xtra_arg+=(--user-data "$vmsetup_exec")
vm_admin_pass=$(rsec WEAK12) || vm_admin_pass=dummypassW12

function echo_info () { echo -e "$COLOR_BLU"     "$@" "$COLOR_CLR" 1>&2 ; }
function echo_warn () { echo -e "$COLOR_RED_BLD" "$@" "$COLOR_CLR" 1>&2 ; }
function debugexec () {
    echo_info ".. EXEC #" "$@"
    [ "$dryrun" != 0 ] || "$@" ; return $?
}

echo_warn "II Deploy $vmcount VMs at location $location, in res_grp $resgrp ..."

# Create RG if not exists.
if ! az group show -g "$resgrp" > /dev/null 2>&1; then
    debugexec az group create -n "$resgrp" --location "$location" || exit $?
fi

# Create an availability set if we want deploy into TiP. This could be a plugin.
if [ "$tipid" != "" ]; then
    echo_warn "++ Using TiP session $tipid at cluster $cluster"

    # `az vm availability-set create` doesn't allow setting internalData.pinnedFabricCluster, we must use the ugly ARM deployment.
    echo "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" | base64 -d | gzip -d > /tmp/template-avset.json || exit $?
    debugexec az deployment group create -g "$resgrp" --template-file /tmp/template-avset.json --parameters "avname=$avname" "location=$location" "tipid=$tipid" "cluster=$cluster" || exit $?
    vm_create_xtra_arg_first_n+=(--availability-set "$avname")
fi

# This could also be a plugin.
if [ "$vnet_ipv6" = 1 ]; then
    vnet_create_xtra_arg+=(--address-prefixes 10.0.0.0/16 fd00:db8:deca::/48 --subnet-prefixes 10.0.0.0/24 fd00:db8:deca::/64)
    explicit_vnet_create=1
fi

# bug fix: some VM size (M96s_v3) doesnt support Trusted Launch, but --security-type Standard broken in azcli 2.71.
if [[ "$vmsize" = Standard_M*_v3 ]]; then
    if az --version | grep azure-cli | grep "2\\.7[123]\\." 2>/dev/null; then
        echo_warn "Mitigation doesnt work. This VM size wont work with Trusted Launch, and azcli 2.71 doesnt allow --security-type Standard"
        echo_warn "Please downgrade to azure-cli 2.70. https://github.com/Azure/azure-cli/issues/31191"
        exit 1
    else
        vm_create_xtra_arg+=(--security-type Standard)
    fi
fi

plugin_hook plugin_before_vnet_creat

# Explicitly create vnet if advanced options are necessary
if [ "$explicit_vnet_create" = 1 ]; then
    if ! az network vnet show -g "$resgrp" --name "$vnetname" > /dev/null 2>&1; then
        [[ " ${vnet_create_xtra_arg[@]} " =~ " --subnets " ]] || vnet_create_xtra_arg+=(--subnet-name default)
        debugexec az network vnet create -g "${resgrp}" --location "${location}" --name "${vnetname}" "${vnet_create_xtra_arg[@]}" || exit $?
    fi
fi

plugin_hook plugin_before_vm_creat

# Actually create the VM
for cter in $(seq $vmcount); do
    debugexec az vm create -g "$resgrp" --name "$vmname$cter" --image "$vmimg" --admin-password "$vm_admin_pass" --admin-username r --location "$location" --size "$vmsize" --vnet-name "$vnetname" --subnet default "${vm_create_xtra_arg[@]}" "${vm_create_xtra_arg_first_n[@]}" || exit $?

    if [ "$vnet_ipv6" = 1 ]; then
        debugexec az network nic ip-config create -g "$resgrp" --name "$vmname${cter}-xtraipc" --nic-name "$vmname${cter}VMNic" --private-ip-address-version IPv6 --vnet-name "$vnetname" --subnet default
    fi

    # Clear these args for only 1st VM
    [ "$cter" -ge "$only_n_vms_in_tip" ] && vm_create_xtra_arg_first_n=()
    plugin_hook plugin_after_each_vm_creat
done

plugin_hook plugin_after_vm_creat
