#!/usr/bin/env bash
# -*- coding: utf-8 -*-

_parse_dracut_args() {
    local verbose=false
    local debug=false
    while true; do
        case "$1" in
            --stdlog)
                shift
                local level="$1"
                shift
                [[ "$level" -ge 4 ]] && debug=true
                ;;
            --verbose)
                shift
                verbose=true
                ;;
            '')
                break
                ;;
            *)
                shift
                ;;
        esac
        local level
        $verbose && level=info
        $debug && level=debug
    done
    $debug
    return $?
}
# WTF does this actually do aside from taking space!
_debug=0
_parse_dracut_args ${dracut_args[*]} || _debug=$?
# endregion

clean() {
# Sourcing some helper functions
    . "$(dirname "${BASH_SOURCE[0]}")/helper/build.inc"
    clean_components
}
# region dracut plugin api
check() {
# Sourcing some helper functions
    . "$(dirname "${BASH_SOURCE[0]}")/helper/build.inc"
    if ! build_initialize_components; then
        echo "Failed to initialize components."
        return 1
    fi
    # NOTE: xmount must be compiled before qemu_xmount
    local xmount_is_built=true
    if [[ ! -f "$moddir/binaries/xmount/trunk/build/src/xmount" ]] ||
        [[ ! -f "$moddir/binaries/qemu-xmount/libxmount_input_qemu.so" ]]; then
            xmount_is_built=false
    fi
    # non-critical if failed
    $xmount_is_built || echo "Compiling 'xmount'/'libxmount_input_qemu' failed."

    if [[ ! -f "$moddir/binaries/dnbd3/build/src/kernel/dnbd3/dnbd3.ko" ]] || \
       [[ ! -f "$moddir/binaries/dnbd3/build/src/client/dnbd3-client" ]]; then
        CMAKE_FLAGS="-DKERNEL_BUILD_DIR=${kernel}" \
            build_compile_dnbd3 "$moddir/binaries/dnbd3/"
        [[ $? != 0 ]] && return 1
    fi
		# TODO xloop checks & remove them from installkernel
    if [[ ! -f "$moddir/binaries/systemd-preserve-process-marker/systemd-preserve-process-marker" ]]; then
        build_compile_systemd_preserve_process_marker \
            "$moddir/binaries/systemd-preserve-process-marker/"
            [[ $? != 0 ]] && return 1
    fi
    # TODO do we still need this ?
    # NOTE: This are workarounds for:
    # - distributions where "systemd-udevd" doesn't lives in "/usr/lib" but in
    #   "/lib".
    local alternate_systemd_udevd_location='/lib/systemd/systemd-udevd'
    if [[ ! -f "${systemdutildir}/systemd-udevd" ]] && \
    [[ -f "$alternate_systemd_udevd_location" ]]; then
        mkdir --parents "${initdir}${systemdutildir}"
        ln --symbolic --force "$alternate_systemd_udevd_location" \
            "${initdir}${systemdutildir}/systemd-udevd"
    fi
    # WTF?
    # - "/usr/bin/sh" isn't available but "/bin/sh".
    if [[ ! -f /usr/bin/sh ]] && [[ -f /bin/sh ]]; then
        ln --symbolic --force /bin/sh /usr/bin/sh
    fi
    return 255
}
depends() {
    echo base bash kernel-modules shutdown slx-dmsetup slx-network
}
installkernel() {
    local extra_kmod_dir="/lib/modules/${kernel}/extra"

    # dnbd3
    mkdir -p "${initdir}/${extra_kmod_dir}"
    inst "${moddir}/binaries/dnbd3/build/src/kernel/dnbd3/dnbd3.ko" "${extra_kmod_dir}/dnbd3.ko"

    # kqcow2 kernel
    local xloop_kmod_build_dir="${moddir}/binaries/xloop/build/src/kernel"

		for mod in xloop xloop_file_fmt_raw xloop_file_fmt_qcow; do
			if [ ! -e "${xloop_kmod_build_dir}/${mod}/${mod}.ko" ]; then
				derror "Failed to find '$mod' in '$xloop_kmod_build_dir'."
				continue
				# TODO fatal fail once we move completely to xloop
			fi
			inst "${xloop_kmod_build_dir}/${mod}/${mod}.ko" "${extra_kmod_dir}/${mod}.ko"
		done
}
install() {
    # region binaries
    inst "${moddir}/binaries/dnbd3/build/src/client/dnbd3-client" /usr/local/bin/dnbd3-client
    inst "${moddir}/binaries/systemd-preserve-process-marker/systemd-preserve-process-marker" \
        /usr/local/bin/systemd-preserve-process-marker
    # xmount
    local \
        xmount_installation="${moddir}/binaries/xmount/trunk/build/release_build"
    if [ -f "${xmount_installation}/usr/bin/xmount" ]; then
        inst "${xmount_installation}/usr/bin/xmount" /usr/bin/xmount
        for file in ${xmount_installation}/usr/lib/xmount/*; do
            inst "$file" /usr/lib/xmount/"$(basename "$file")"
        done
        inst "$moddir/binaries/qemu-xmount/libxmount_input_qemu.so" \
            /usr/lib/xmount/libxmount_input_qemu.so
        # HACK fix missing libraries for some xmount input libs
        # TODO copy the dependencies using dracut functions...
        inst_libdir_file 'libafflib.so*'
        inst_libdir_file 'libewf.so*'
    fi
    # xlosetup
    local xlosetup_build_path="${moddir}/binaries/xloop/build/src/utils/sys-utils/xlosetup"
    if [ -f "$xlosetup_build_path" ]; then
        inst "$xlosetup_build_path" /usr/local/bin/xlosetup
    fi
    local xloop_udev_rule="${moddir}/binaries/xloop/src/kernel/udev/50-xloop.rules"
    if [ -f "$xloop_udev_rule" ]; then
        inst "$xloop_udev_rule" "/etc/udev/rules.d/${xloop_udev_rule##*/}"
    fi
    # endregion
    # region hooks
    #inst_hook cmdline 00 "$moddir/hooks/enable-sysrq.sh"
    # NOTE: Can be used to support old style ip append syntax and have an
    # exclusive interface name - required when using dracut's regular
    # 'network' module
    dracut_module_included "network" && inst_hook cmdline 10 \
        "$moddir/hooks/prepare-kernel-command-line-parameter.sh"
    inst_hook cmdline 90 "$moddir/hooks/set-dracut-environment-variables.sh"
    # make the final blockdevice for the root system (dnbd3 -> xmount ->
    # device-mapper)
    slx_service "s3-dnbd3root" "Setup dnbd3-based block device of rootfs" \
        --after "s3-fetch-config.service" \
        --after "dracut-pre-mount.service" \
        --wbefore "dracut-mount.service" \
        --wbefore "initrd-root-device.target"
    # Mount the root file system
    slx_service "s3-mount-root" "Mount /sysroot" \
        --after    "initrd-root-device.target" \
        --requires "initrd-root-device.target" \
        --wbefore  "initrd-root-fs.target"
    slx_service "s3-write-fstab" "Write final fstab for stage4" \
        --after    "s3-mount-root"
    # Copy systemd services to new root (so they don't get killed after
    # switch_root)
    inst_hook pre-pivot 90 \
        "$moddir/hooks/copy-dracut-systemd-files-into-newroot.sh"
    # endregion
    # region configuration files
    mkdir --parents \
        "${initdir}/etc/systemd/system.conf.d"
    # Make sure all services know about NEWROOT=/sysroot
    inst "$moddir/configuration/systemd-newroot.conf" \
        "/etc/systemd/system.conf.d/systemd-newroot.conf"
    # Use terminal readline settings from the template system.
    inst /etc/inputrc /etc/inputrc
    # Set some aliases for the initramfs context.
    if [[ "$_debug" == 0 ]]; then
        inst "$moddir/configuration/bash" '/etc/bash.bashrc'
        inst "$moddir/configuration/bash" '/etc/profile.d/aliases'
    fi
    # endregion
    # check if busybox can offer a desired tool (and desired features)
    # before adding anything here.
    inst_multiple \
        bash \
        curl \
        dmsetup \
        grep \
        insmod \
        lsblk \
        mount
}