#!/bin/bash
set -Eeuo pipefail

KVM_ERR=""
KVM_OPTS=""

if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
  if ! grep -q -e vmx -e svm /proc/cpuinfo; then
    KVM_ERR="(vmx/svm disabled)"
  fi
else
  [ -e /dev/kvm ] && KVM_ERR="(no write access)" || KVM_ERR="(device file missing)"
fi

if [ -n "${KVM_ERR}" ]; then
  if [ "$ARCH" == "amd64" ]; then
    error "KVM acceleration not detected ${KVM_ERR}, see the FAQ about this."
    [[ "${DEBUG}" != [Yy1]* ]] && exit 88
  fi
else
  KVM_OPTS=",accel=kvm -enable-kvm -cpu host"
fi

DEF_OPTS="-nographic -nodefaults -boot strict=on -display none"
RAM_OPTS=$(echo "-m ${RAM_SIZE}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
CPU_OPTS="-smp ${CPU_CORES},sockets=1,dies=1,cores=${CPU_CORES},threads=1"
MAC_OPTS="-machine type=q35,usb=off,dump-guest-core=off,hpet=off${KVM_OPTS}"
EXTRA_OPTS="-device virtio-balloon-pci,id=balloon0,bus=pcie.0,addr=0x4"
EXTRA_OPTS="$EXTRA_OPTS -object rng-random,id=objrng0,filename=/dev/urandom"
EXTRA_OPTS="$EXTRA_OPTS -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pcie.0,addr=0x1c"

if [[ "${GPU}" == [Yy1]* ]] && [[ "$ARCH" == "amd64" ]]; then
  DEF_OPTS="-nodefaults -boot strict=on -display egl-headless,rendernode=/dev/dri/renderD128"
  DEF_OPTS="${DEF_OPTS} -device virtio-vga,id=video0,max_outputs=1,bus=pcie.0,addr=0x1"
fi

ARGS="${DEF_OPTS} ${CPU_OPTS} ${RAM_OPTS} ${MAC_OPTS} ${MON_OPTS} ${SERIAL_OPTS} ${NET_OPTS} ${DISK_OPTS} ${EXTRA_OPTS} ${ARGUMENTS}"
ARGS=$(echo "$ARGS" | sed 's/\t/ /g' | tr -s ' ')

return 0