#!/bin/bash -e

show_help() {
    echo "usage: prepare"
    echo "       restore"
    echo "       build-image IMAGE-TYPE"
    echo "       create-vm IMAGE-TYPE [--param-cdrom PARAM] [--param-cpus PARAM] [--param-mem PARAM]"
    echo "       is-nested [core|classic|uc16|uc18|uc20|uc22|uc24]"
    echo "       show [ATTRIBUTE]"
    echo "       vm <ACTION>"
    echo "       get <ARTIFACT>"
    echo "       download <REMOTE_FILE>"
    echo "       wait-for <EVENT>"
    echo "       boot-id"
    echo "       is-enabled <tpm|kvm|secboot>"
    echo "       secboot-sign <file|gadget> <PATH> <KEY> <CERT>"
    echo "       secboot-remove-signature <PATH>"
    echo "       transition <recovery-system> <system-mode>"
    echo "       snap-rev <snap-name> [channel]"
    echo "       build-seed <seed-dir> <seed-name> <label>"
    echo "       nested-system"
    echo ""
    echo "Available options:"
    echo "  -h --help   show this help message."
    echo ""
    echo "COMMANDS:"
    echo "  prepare:                    creates all the directories needed to run a nested test"
    echo "  restore:                    removes all the directories and data used by nested tests"
    echo "  build-image:                creates an image using ubuntu image tool"
    echo "  create-vm:                  creates new virtual machine and leave it running"
    echo "  is-nested:                  indicates if the execution is using a nested vm"
    echo "  vm:                         runs an action for the current vm"
    echo "  exec:                       executes a command in the vm"
    echo "  copy:                       copies a file to the vm"
    echo "  get:                        retrieves an artifact"
    echo "  download:                   download an artifact"
    echo "  wait-for:                   waits for the specified event"
    echo "  boot-id:                    prints the boot id"
    echo "  is-enabled:                 indicated if the feature is enabled"
    echo "  secboot-sign:               signs an artifact"
    echo "  secboot-remove-signature:   removes a signature"
    echo "  transition:                 transition to system mode (just available for uc20)"
    echo "  snap-rev:                   get the snap rev in the vm (prints the installed rev if no channel provided)"
    echo "  build-seed                  build a seed that can be used to boot a vm"
    echo "  prepare-essential-snaps     download and repack essential snaps (gadget, kernel, snapd) to include current snapd, and debug command lines"
    echo "  configure-default-user      add either cloudinit user or a system-user assertion that will be auto-imported"
    echo "  nested-system               retrieves the nested system used for spread nested tests"
    echo ""
    echo "IMAGE-TYPES:"
    echo "  core:    work with a core image"
    echo "  classic: work with a classic image"
    echo ""
    echo "ATTRIBUTE:"
    echo "  version: the version of the system i.e. 16, 18, 20, 22"
    echo ""
    echo "ACTION:"
    echo "  start:  starts a stopped vm"
    echo "  stop:   shutdowns a running vm"
    echo "  remove: removes a vm"
    echo "  status: retrieves status for a running vm"
    echo ""
    echo "ARTIFACT:"
    echo "  serial-log:       serial log for the nested vm"
    echo "  model-authority:  authority id for the current model"
    echo "  image-name:       then name of the image used for the test"
    echo "  current-name:     then name of the image being executed"
    echo "  extra-snaps-path: paths used to store extra snaps"
    echo "  assets-path:      path used to store vm assets"
    echo "  images-path:      path used to store vm images"
    echo ""
    echo "REMOTE_FILE:"
    echo "  snakeoil-key: snakeoil key"
    echo "  spread:       the spread binary"
    echo ""
    echo "EVENT:"
    echo "  ssh:                it is possible to ssh to the vm"
    echo "  no-ssh:             is not possible to ssh to the vm"
    echo "  snap-command:       snap command is available in the vm"
    echo "  reboot:             reboot is done in the vm"
    echo "  device-initialized: the device is initialized and has a serial"
    echo ""
}

prepare() {
    nested_prepare_env
}

restore() {
    nested_cleanup_env
}

build_image() {
    if [ $# -eq 0 ]; then
        show_help
        exit 1
    fi
    while [ $# -gt 0 ]; do
        case "$1" in
            classic)
                nested_create_classic_vm
                exit
                ;;
            core)
                nested_create_core_vm
                exit
                ;;
            *)
                echo "tests.nested: expected either classic or core as argument" >&2
                exit 1
                ;;
        esac
    done
}

create_vm() {
    if [ $# -eq 0 ]; then
        show_help
        exit 1
    fi
    local action=
    case "$1" in
        classic)
            shift 1
            action=nested_start_classic_vm
            ;;
        core)
            shift 1
            action=nested_start_core_vm
            ;;
        *)
            echo "tests.nested: unsupported parameter $1" >&2
            exit 1
            ;;
    esac

    local NESTED_PARAM_CD NESTED_CPUS NESTED_MEM NESTED_PARAM_EXTRA NESTED_TPM_NO_RESTART
    while [ $# -gt 0 ]; do
        case "$1" in
            --param-cdrom)
                NESTED_PARAM_CD="$2"
                shift 2
                ;;
            --param-mem)
                NESTED_MEM="$2"
                shift 2
                ;;
            --param-cpus)
                NESTED_CPUS="$2"
                shift 2
                ;;
            --extra-param)
                NESTED_PARAM_EXTRA="$2"
                shift 2
                ;;
            --tpm-no-restart)
                NESTED_TPM_NO_RESTART=1
                shift
                ;;
            *)
                echo "tests.nested: unsupported parameter $1" >&2
                exit 1
                ;;
        esac
    done

    export NESTED_PARAM_CD NESTED_CPUS NESTED_MEM NESTED_PARAM_EXTRA NESTED_TPM_NO_RESTART
    "$action"
    unset NESTED_PARAM_CD NESTED_CPUS NESTED_MEM NESTED_PARAM_EXTRA NESTED_TPM_NO_RESTART
}

is_nested() {
    if [ $# -eq 0 ]; then
        nested_is_nested_system
    else
        case "$1" in
            core)
                nested_is_core_system
                ;;
            classic)
                nested_is_classic_system
                ;;
            uc16)
                nested_is_core_16_system
                ;;
            uc18)
                nested_is_core_18_system
                ;;
            uc20)
                nested_is_core_20_system
                ;;
            uc22)
                nested_is_core_22_system
                ;;
            uc24)
                nested_is_core_24_system
                ;;
            *)
                echo "tests.nested: parameter not supported: $1" >&2
                exit 1
                ;;
        esac
    fi
}

show() {
    if [ $# -eq 0 ]; then
        echo "tests.nested: attribute to show is required" >&2
        exit 1
    else
        case "$1" in
            version)
                nested_get_version
                ;;
            *)
                echo "tests.nested: attribute not supported: $1" >&2
                exit 1
                ;;
        esac
    fi
}

vm() {
    case "$1" in
        start)
            nested_start
            ;;
        stop)
            nested_shutdown
            ;;
        remove)
            nested_destroy_vm
            ;;
        status)
            nested_status_vm
            ;;
        unclean-reboot)
            nested_force_restart_vm
            ;;
        *)
            echo "tests.nested: action not supported: $1" >&2
            exit 1
            ;;
    esac
}

get() {
    if [ $# -eq 0 ]; then
        show_help
        exit 1
    fi
    local action=
    case "$1" in
        serial-log)
            action=nested_print_serial_log
            shift
            ;;
        model-authority)
            action=nested_model_authority
            shift
            ;;
        image-name)
            action=nested_get_image_name
            shift
            ;;
        current-name)
            action=nested_get_current_image_name
            shift
            ;;
        extra-snaps-path)
            action=nested_get_extra_snaps_path
            shift
            ;;
        assets-path)
            action=nested_get_assets_path
            shift
            ;;
        images-path)
            action=nested_get_images_path
            shift
            ;;
        *)
            echo "tests.nested: unsupported parameter $1" >&2
            exit 1
            ;;
    esac

    "$action" "$@"
}

download() {
    if [ $# -eq 0 ]; then
        show_help
        exit 1
    fi
    local action=
    case "$1" in
        snakeoil-key)
            action=nested_get_snakeoil_key
            shift
            ;;
        spread)
            action=nested_fetch_spread
            shift
            ;;
        *)
            echo "tests.nested: unsupported parameter $1" >&2
            exit 1
            ;;
    esac

    "$action" "$@"
}

wait_for() {
    if [ $# -eq 0 ]; then
        show_help
        exit 1
    fi
    local action=
    case "$1" in
        ssh)
            action=nested_wait_for_ssh
            shift
            ;;
        no-ssh)
            action=nested_wait_for_no_ssh
            shift
            ;;
        snap-command)
            action=nested_wait_for_snap_command
            shift
            ;;
        reboot)
            action=nested_wait_for_reboot
            shift
            ;;
        device-initialized)
            action=nested_wait_for_device_initialized_change
            shift
            ;;
        *)
            echo "tests.nested: unsupported parameter $1" >&2
            exit 1
            ;;
    esac

    "$action" "$@"
}

boot_id() {
    nested_get_boot_id
}

is_enabled() {
    case "$1" in
        kvm)
            nested_is_kvm_enabled
            ;;
        tpm)
            nested_is_tpm_enabled
            ;;
        secboot)
            nested_is_secure_boot_enabled
            ;;
        *)
            echo "tests.nested: feature not supported: $1" >&2
            exit 1
            ;;
    esac
}

secboot_sign() {
    case "$1" in
        file)
            shift
            nested_secboot_sign_file "$@"
            ;;
        gadget)
            shift
            nested_secboot_sign_gadget "$@"
            ;;
        *)
            echo "tests.nested: action not supported: $1" >&2
            exit 1
            ;;
    esac
}

secboot_remove_signature() {
    nested_secboot_remove_signature "$@"
}

transition() {
    nested_uc20_transition_to_system_mode "$@"
}

snap_rev() {
    if [ $# -eq 0 ] || [ $# -gt 2 ]; then
        show_help
        exit 1
    elif [ $# -eq 1 ]; then
        nested_get_core_revision_installed "$@"
    else
        nested_get_core_revision_for_channel "$@"
    fi
}

build_seed() {
    nested_build_seed_cdrom "$@"
}

prepare_essential_snaps() {
    nested_prepare_essential_snaps
}

configure_default_user() {
    nested_configure_default_user
}

nested_system() {
    if os.query is-ubuntu 16.04; then
        echo ubuntu-core-16-64
    elif os.query is-ubuntu 18.04; then
        echo ubuntu-core-18-64
    elif os.query is-ubuntu 20.04; then
        echo ubuntu-core-20-64
    elif os.query is-ubuntu 22.04; then
        echo ubuntu-core-22-64
    elif os.query is-ubuntu 24.04; then
        echo ubuntu-core-24-64
    else
        echo "unsupported nested system"
        exit 1
    fi
}

main() {
    if [ $# -eq 0 ]; then
        show_help
        exit 0
    fi

    local subcommand="$1"
    local action=
    while [ $# -gt 0 ]; do
        case "$1" in
            -h|--help)
                show_help
                exit 0
                ;;
            *)
                action=$(echo "$subcommand" | tr '-' '_')
                shift
                break
                ;;
        esac
    done

    if [ -z "$(declare -f "$action")" ]; then
        echo "tests.nested: no such command: $subcommand"
        show_help
        exit 1
    fi

    #shellcheck source=tests/lib/nested.sh
    . "$TESTSLIB/nested.sh"
    "$action" "$@"
}

main "$@"