#!/usr/bin/env bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

function HELP {
    echo "help:"
    echo "-b a virtio block device"
    echo "-c cmpctmalloc instead of dlmalloc"
    echo "-M miniheap instead of dlmalloc"
    echo "-n a virtio network device"
    echo "-t a virtio tap network device"
    echo "-d a virtio display"
    echo "-e sifive e platform"
    echo "-u sifive u platform"
    echo "-6 64bit"
    echo "-S supervisor mode (using OpenSBI)"
    echo "   currently only works in 64bit mode"
    echo "-m <memory in MB>"
    echo "-s <number of cpus>"
    echo "-h for help"
    echo "all arguments after -- are passed to qemu directly"
    exit 1
}

DO_NET=0
DO_NET_TAP=0
DO_BLOCK=0
DO_64BIT=0
DO_EMBEDDED=0
DO_UNLEASHED=0
DO_DISPLAY=0
DO_CMPCTMALLOC=0
DO_MINIHEAP=0
DO_SUPERVISOR=0
SMP=1
MEMSIZE=512
SUDO=""
PROJECT=""

while getopts bdhm:cMmnteu6p:s:S FLAG; do
    case $FLAG in
        b) DO_BLOCK=1;;
        c) DO_CMPCTMALLOC=1;;
        d) DO_DISPLAY=1;;
        M) DO_MINIHEAP=1;;
        n) DO_NET=1;;
        t) DO_NET_TAP=1;;
        e) DO_EMBEDDED=1;;
        u) DO_UNLEASHED=1;;
        6) DO_64BIT=1;;
        m) MEMSIZE=$OPTARG;;
        s) SMP=$OPTARG;;
        S) DO_SUPERVISOR=1;;
        p) PROJECT=$OPTARG;;
        h) HELP;;
        \?)
            echo unrecognized option
            HELP
    esac
done

shift $((OPTIND-1))

CPU=""
BIOS=""

if (( $DO_UNLEASHED == 1 )); then
    QEMU="qemu-system-riscv64"
    MACHINE="sifive_u"
    _PROJECT="qemu-sifive-u-test"
    if (( $SMP == 1 )); then
        SMP=2
    fi
    if (( $MEMSIZE == 512 )); then
        MEMSIZE=8192
    fi
elif (( $DO_EMBEDDED == 1 )); then
    QEMU="qemu-system-riscv32"
    MACHINE="sifive_e"
    _PROJECT="sifive-e-test"
    MEMSIZE=0
    SMP=0
elif (( $DO_64BIT )); then
    QEMU="qemu-system-riscv64"
    CPU="rv64"
    MACHINE="virt"
    if (( $DO_SUPERVISOR )); then
        _PROJECT="qemu-virt-riscv64-supervisor-test"
        BIOS="default"
    else
        _PROJECT="qemu-virt-riscv64-test"
        BIOS="none"
    fi
else
    QEMU="qemu-system-riscv32"
    CPU="rv32"
    MACHINE="virt"
    _PROJECT="qemu-virt-riscv32-test"
    BIOS="none"
fi
if [[ -z "$PROJECT" ]]; then
    PROJECT=$_PROJECT
fi

BLOCK_ARGS=" -drive if=none,file=blk.bin,id=blk,format=raw -device virtio-blk-device,drive=blk"
NET_ARGS=" -netdev user,id=vmnic,hostname=qemu -device virtio-net-device,netdev=vmnic"
NET_TAP_ARGS=" -netdev tap,id=vmnic -device virtio-net-device,netdev=vmnic"
NO_DISPLAY_ARGS=" -nographic"
DISPLAY_ARGS=" -device virtio-gpu-device -serial stdio"

# construct a list of args based on previous variables
ARGS=" -machine $MACHINE -kernel build-${PROJECT}/lk.elf"
if [[ ! -z "$CPU" ]]; then
    ARGS+=" -cpu $CPU"
fi
if (( $MEMSIZE )); then
    ARGS+=" -m $MEMSIZE"
fi
if (( $SMP )); then
    ARGS+=" -smp $SMP"
fi
if [[ ! -z "$BIOS" ]]; then
    ARGS+=" -bios $BIOS"
fi
if (( $DO_BLOCK )); then
    ARGS+=$BLOCK_ARGS
fi
if (( $DO_NET )); then
    ARGS+=$NET_ARGS
fi
if (( $DO_NET_TAP )); then
    ARGS+=$NET_TAP_ARGS
    SUDO="sudo "
fi
if (( $DO_DISPLAY )); then
    ARGS+=$DISPLAY_ARGS
else
    ARGS+=$NO_DISPLAY_ARGS
fi

MAKE_VARS=""

if (( $DO_CMPCTMALLOC )); then
    MAKE_VARS=LK_HEAP_IMPLEMENTATION=cmpctmalloc
elif (( $DO_MINIHEAP )); then
    MAKE_VARS=LK_HEAP_IMPLEMENTATION=miniheap
fi

$DIR/make-parallel $MAKE_VARS $PROJECT &&
echo $SUDO $QEMU $ARGS $@ &&
$SUDO $QEMU $ARGS $@