#!/bin/bash
set -e
# help: build and run RancherOS, requires KVM local

cd $(dirname $0)/..

source ./scripts/run-common

MEMORY=2048

while [ "$#" -gt 0 ]; do
    case $1 in
        --iso)
            BOOT_ISO=1
            QEMU=0
            QIND=0
            REBUILD=0
            ;;
        --boothd)
            BOOT_HD=1
            QEMU=0
            QIND=0
            REBUILD=0
            ;;
        --append)
            shift 1
            QEMU_APPEND="${QEMU_APPEND} $1"
            ;;
        --memory)
            shift 1
            MEMORY="$1"
            ;;
        --name)
            shift 1
            NAME="$1"
            ;;
        --cloud-config)
            shift 1
            CLOUD_CONFIG="$1" || :
            if [ ! -f ${CLOUD_CONFIG} ]; then
                echo No such file: "'"${CLOUD_CONFIG}"'" 1>&2
                exit 1
            fi
            ;;
        --cloud-config-iso)
            CLOUD_CONFIG_FORMAT="iso"
            ;;
        --cloud-config-fat)
            CLOUD_CONFIG_FORMAT="fat"
            ;;
        --second-drive)
            SECOND_DRIVE=1
            ;;
        --arch)
            shift 1
            ARCH="$1"
            ;;
        --qemu)
            QEMU=1
            ;;
        --qind)
            QIND=1
            QEMU=0
            ;;
        --kvm)
            KVM=1
            ;;
        --no-format)
            FORMAT=0
            ;;
        --no-rm-usr)
            RM_USR=0
            ;;
        --no-rebuild)
            REBUILD=0
            ;;
        --fresh)
            FRESH=1
            ;;
        --b2d)
            # use together with --fresh to trigger boot2docker/machine auto-format
            AUTOFORMAT=1
            ;;
        --console)
        # use the bios console, not serial (lets you see syslinux)
            CONSOLEDISPLAY=1
            ;;
        --installed)
            ./scripts/create-installed
            INSTALLED=1
            ;;
        *)
            break
            ;;
    esac
    shift 1
done

if [ "$QEMU" == "1" ] && ! which qemu-system-${QEMUARCH}; then
    QEMU=0
fi

if [[ ! -e ${KERNEL} || ! -e ${INITRD_SRC} ]]; then
    echo "Failed to find ${KERNEL} or ${INITRD_SRC}" 1>&2
    exit 1
fi

echo "initrd ${INITRD}"
if [ "$REBUILD" == "1" ] || [ ! -e ${INITRD} ]; then
    echo "rebuilding ${INITRD} from ${INITRD_SRC}"
    cp bin/ros ${INITRD_SRC}/usr/bin/ros
    ./scripts/hash-initrd
    pushd ${INITRD_SRC} >/dev/null
    find . | cpio -H newc -o | gzip -1 > ${INITRD}
    popd >/dev/null
fi

KERNEL_ARGS="${DEFAULT_KERNEL_ARGS} ${QEMU_APPEND}"
if [ "$FORMAT" == "1" ]; then
    KERNEL_ARGS="${KERNEL_ARGS} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.autoformat=[/dev/sda,/dev/vda]"
fi
if [ "$RM_USR" == "1" ]; then
    KERNEL_ARGS="${KERNEL_ARGS} rancher.rm_usr"
fi

if [ "$KVM" == "" ] && [ -c /dev/kvm ] && [ -r /dev/kvm ] && [ -w /dev/kvm ]; then
    KVM=1
fi
set -x
if [ "$QEMU" == "1" ] || [ "$BOOT_ISO" == "1" ] || [ "$BOOT_HD" == "1" ]; then
    HD=${BASE}/state/hd.img
    HD2=${BASE}/state/hd2.img
    [ "$FRESH" == "1" ] && rm -f ${HD} ${HD2} >/dev/null 2>&1 || :

    if [ ! -e ${HD} ]; then
        mkdir -p $(dirname ${HD})
        if [ ¨$INSTALLED¨ == ¨1¨ ]; then
            ./scripts/create-installed
        else
        if [ "$AUTOFORMAT" == "1" ]; then
            echo "boot2docker, please format-me" | cat - /dev/zero | head -c 5242880 > format-flag.txt # 5M
            qemu-img convert -f raw format-flag.txt -O qcow2 ${HD}
            qemu-img resize ${HD} +10GB
        else
            qemu-img create -f qcow2 -o size=10G ${HD}
        fi
        fi
    fi

    if [ "$SECOND_DRIVE" == "1" ]; then
        if [ "$FRESH" == "1" ]; then
            qemu-img create -f qcow2 -o size=10G ${HD2}
        fi
        SECOND_DRIVE_ENABLE=$(eval "${hd["$ARCH"]} ${HD2}")
    fi
fi

if [ "$QIND" != "1" ]; then
    CPU=${cpu["$ARCH"]}
    if [ "$KVM" == "1" ] && [ "$ARCH" == "$HOST_ARCH" ]; then
        KVM_ENABLE="-enable-kvm"
        CPU="-cpu host"
    fi

    CCROOT=${BUILD}/cloud-config
    rm -rf ${CCROOT}
    mkdir -p ${CCROOT}

    USER_DATA=${CCROOT}/openstack/latest/user_data
    mkdir -p $(dirname ${USER_DATA})
    rm -f ${USER_DATA} || :
    if [ -n "$CLOUD_CONFIG" ]; then
        cat ${CLOUD_CONFIG} > ${USER_DATA}
    else
        echo "#cloud-config" > ${USER_DATA}
        echo "ssh_authorized_keys:" >> ${USER_DATA}
        echo "- $(<${BASE}/assets/rancher.key.pub)" >> ${USER_DATA}
    fi
    case $CLOUD_CONFIG_FORMAT in
        iso)
            mkisofs -R -V config-2 -o ${BASE}/state/configdrive.iso ${CCROOT}
            CLOUD_CONFIG_DISK="-cdrom ${BASE}/state/configdrive.iso"
        ;;
        fat)
            echo "TODO: implement a vfat formated qemu img & copy the config files into it"
            exit 1
        ;;
        *)
            CLOUD_CONFIG_DISK="-fsdev local,security_model=passthrough,readonly,id=fsdev0,path=${CCROOT} \
                -device virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=config-2"
        ;;
    esac

    HOME=${HOME:-/}
fi

if [ "$CONSOLEDISPLAY" == "1" ]; then
    DISPLAY_OPTS="-curses"
else
    # default
    DISPLAY_OPTS="-nographic -serial stdio -display none"
fi

if [ "$QEMU" == "1" ]; then

    if [ "$INSTALLED" == "1" ]; then
        # kernel args only works when using -kernel
        KERNEL_ARGS=""
    else
        INSTALLED_ARGS="-kernel ${KERNEL} -initrd ${INITRD}"
    fi
    set -x
    exec qemu-system-${QEMUARCH} \
            ${DISPLAY_OPTS} \
            -rtc base=utc,clock=host \
            ${INSTALLED_ARGS} \
            -append "${KERNEL_ARGS}" \
            ${KVM_ENABLE} \
            ${CPU} \
            ${machine["$ARCH"]} \
            -m $MEMORY \
            ${network["$ARCH"]} \
            $(eval "${hd["$ARCH"]} ${HD}") \
            ${SECOND_DRIVE_ENABLE} \
            -smp 1 \
            ${CLOUD_CONFIG_DISK} \
            -fsdev local,security_model=none,id=fsdev1,path=${HOME} \
            -device virtio-9p-pci,id=fs1,fsdev=fsdev1,mount_tag=home \
            ${QEMU_ARGS} \
            "${@}"

elif [ "$BOOT_ISO" == "1" ] ||
            [ "$BOOT_HD" == "1" ]; then
    if [ "$BOOT_ISO" == "1" ]; then
        ISO_OPTS="-boot d -cdrom ./dist/artifacts/rancheros.iso \
            ${CLOUD_CONFIG_DISK} \
            -fsdev local,security_model=none,id=fsdev1,path=${HOME} \
            -device virtio-9p-pci,id=fs1,fsdev=fsdev1,mount_tag=home "
            echo "----- $ISO_OPTS"
    fi
    set -x
    exec qemu-system-${QEMUARCH} \
            ${DISPLAY_OPTS} \
            -rtc base=utc,clock=host \
            ${KVM_ENABLE} \
            ${CPU} \
            ${machine["$ARCH"]} \
            -m $MEMORY \
            ${network["$ARCH"]} \
            $(eval "${hd["$ARCH"]} ${HD}") \
            ${SECOND_DRIVE_ENABLE} \
            -smp 1 \
            ${ISO_OPTS}
elif [ "$QIND" == "1" ]; then

    NAME=${NAME:-ros-qind}

    if [ "$FRESH" == "1" ]; then
        docker rm -fv ${NAME} >/dev/null 2>&1 || :
    fi
    if ! docker inspect ${NAME} >/dev/null 2>&1; then
        if [ "$KVM" == "1" ]; then
            KVM_ENABLE="--device=/dev/kvm:/dev/kvm"
        fi

        mkdir -p ./tmp
        TMP=$(mktemp -d ./tmp/ros-qind-XXXXXX)
        mkdir -p ${TMP}/stuff
        trap "rm -rf ${TMP}" EXIT
        ln ${CLOUD_CONFIG} ${KERNEL} ${INITRD} ./assets/rancher.key ./assets/rancher.key.pub ${TMP}/stuff/

        KERNEL_FILE=$(basename ${KERNEL})
        INITRD_FILE=$(basename ${INITRD})

        if [ -n "$CLOUD_CONFIG" ]; then
            CLOUD_CONFIG_ENABLE="--cloud-config /stuff/$(basename ${CLOUD_CONFIG})"
        else
            SSH_PUB_ENABLE="--ssh-pub /stuff/rancher.key.pub"
        fi

        set -x
        docker create --name=${NAME} -it ${KVM_ENABLE} \
                    rancher/qind \
                    --hostname "rancher-dev" \
                    ${CLOUD_CONFIG_ENABLE} \
                    ${SSH_PUB_ENABLE} \
                    -m 1G -kernel /stuff/${KERNEL_FILE} -initrd /stuff/${INITRD_FILE} -append "${KERNEL_ARGS}" \
                    "${@}"

        docker cp ${TMP}/stuff ${NAME}:/stuff
        rm -rf ${TMP}
    fi
    exec docker start -ai ${NAME}

else
    exit 42
fi