#!/bin/bash -eu

ISO="$1"; shift
DISK="$HOME/${ISO%.*}.qcow2"
RAM="$(free -g | awk '/^Mem:/{t=$2 / 2; print(t < 2 ? 2 : t)"G"}')"

if ! [ -f "$ISO" ]; then
    echo "$ISO does not exist" >&2
    exit 1
fi

if ! [ -f "$DISK" ]; then (set -x
    qemu-img create -f qcow2 "$DISK" 64G
) fi
(set -x
qemu-system-x86_64 \
    -accel   kvm \
    -M       q35 \
    -bios    /usr/share/edk2/x64/OVMF.4m.fd \
    -monitor stdio \
    -smp     "$(nproc --ignore 4)" \
    -m       "$RAM" \
    -vga     virtio \
    -audio   pipewire,model=hda \
    -nic     model=virtio-net-pci,type=user \
    -device  qemu-xhci \
    -object  "memory-backend-ram,id=mem,size=$RAM,share=on" \
    -numa    node,memdev=mem \
    -drive   "if=virtio,file=$DISK" \
    -drive   "file=$ISO,media=cdrom,readonly=on" \
    "$@"
)