# vim: set ft=sh:

run_hook() {
    if [[ -n "${ip}" && -n "${archiso_curl_url}" ]]; then

        archiso_curl_url=$(eval echo ${archiso_curl_url})
        [[ -z "${curlspace_size}" ]] && curlspace_size="75%"

        mount_handler="archiso_pxe_curl_mount_handler"
    fi
}

# Fetch a file with CURL
#
# $1 URL
# $2 Destination directory inside curlspace
_curl_get() {
    local _url="${1}"
    local _dst="${2}"

    msg ":: Downloading '${_url}'"
    if ! curl -f -o "/run/archiso/curlspace/${_dst}/${_url##*/}" --create-dirs "${_url}"; then
        echo "ERROR: Downloading '${_url}'"
        echo "   Falling back to interactive prompt"
        echo "   You can try to fix the problem manually, log out when you are finished"
        launch_interactive_shell
    fi
}

archiso_pxe_curl_mount_handler () {
    newroot="${1}"

    msg ":: Mounting /run/archiso/curlspace (tmpfs) filesystem, size='${curlspace_size}'"
    mkdir -p "/run/archiso/curlspace"
    mount -t tmpfs -o size="${curlspace_size}",mode=0755 curlspace "/run/archiso/curlspace"

    # Check if URL ends in /
    if [[ "${archiso_curl_url}" != "${archiso_curl_url%/}" ]]; then

        local _aitab_url="${archiso_curl_url}${aitab#/run/archiso/bootmnt/}"
        local _aitab_file="/run/archiso/curlspace/${aitab#/run/archiso/bootmnt/}"

        _curl_get "${_aitab_url}" "${archisobasedir}"

        local aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size
        while read aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size; do
            [[ "${aitab_img#\#}" != "${aitab_img}" ]] && continue
            [[ "${aitab_arch}" != "any" && "${aitab_arch}" != "${arch}" ]] && continue
            if [[ "${aitab_fs_type}" != "none" ]]; then
                _curl_get "${archiso_curl_url}${archisobasedir}/${aitab_arch}/${aitab_img}.fs.sfs" "${archisobasedir}/${aitab_arch}"
            else
                _curl_get "${archiso_curl_url}${archisobasedir}/${aitab_arch}/${aitab_img}.sfs" "${archisobasedir}/${aitab_arch}"
            fi
        done < "${_aitab_file}"

        if [[ "${checksum}" == "y" ]]; then
            _curl_get "${archiso_curl_url}${archisobasedir}/checksum.${arch}.md5" "${archisobasedir}"
        fi

        mkdir -p "/run/archiso/bootmnt"
        mount -o bind /run/archiso/curlspace /run/archiso/bootmnt
    else
        local _dev_loop

        _curl_get "${archiso_curl_url}" "/"

        _dev_loop=$(losetup -f)
        if ! losetup "${_dev_loop}" "/run/archiso/curlspace/${archiso_curl_url##*/}"; then
            echo "ERROR: Setting loopback device '${_dev_loop}'"
            echo "   for file '/run/archiso/curlspace/${archiso_curl_url##*/}'"
            echo "   Falling back to interactive prompt"
            echo "   You can try to fix the problem manually, log out when you are finished"
            launch_interactive_shell
        fi
    fi
    archiso_mount_handler ${newroot}
}