#!/bin/bash

# Copyright: 2023 Virtuozzo International GmbH

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

[ -n "${DEFAULTLIB_VERSION:-}" ] && return 0;
DEFAULTLIB_VERSION="0.1";

set -o errtrace
DESCRIPTION="No description available!";
VERSION="1";
DEFAULT_ACTION="usage";
if [[ "$UID" == '0' ]]; then
    ACTIONS_LOG="/var/log/actions$$.log";
else
    ACTIONS_LOG="/tmp/actions$$.log";
fi
$PROGRAM 'grep';
$PROGRAM 'sed';

function describeUsage() {
    echo "Display usage information";
}

function describeHelp() {
    echo "Display help text";
}

function doUsage() {
    showUsageMessage;
}

function showUsageMessage() {
    local action;

    echo -e "Usage: ${MANAGE_COMMAND} <action> <options>\n";
    echo "Standard actions:";
    for action in help usage version; do
        local desc=""
        action=$($SED 's/\([a-zA-Z0-9]\)\([a-zA-Z0-9]*\)/\u\1\2/g' <<< ${action});
        isFunction "describe${action}" && desc=$(describe${action});
        echo -e "\t${action}\t\t${desc:-(no description)}";
    done

    echo -e "\nExtra actions:";

    for action in $(set | $SED -n -e '/^do\S\+ ()\s*$/s/^do\(\S\+\).*/\1/p' | $GREP -v 'Action' | sort); do
        case "${action}" in
            help|usage|version)
                continue;
                ;;
            ?*)
                local desc="" ifs_save="${IFS}" action_text line options

                isFunction "describe${action}" && desc=$(describe${action});
                writeListEntry "${action}" "${desc:-(no description)}";
                if isFunction "describe${action}Parameters"; then
                    writeListEntry "\t$(describe${action}Parameters)";
                fi

                ;;
        esac;
    done;
    true;
}

function describeVersion() {
    echo "Display version information";
}

function doVersion() {
    [[ -n ${MANAGE_MODULE_NAME} && -n ${VERSION} ]] && echo "${MANAGE_MODULE_NAME}.module ${VERSION}";
    echo "${MANAGE_PROGRAM_NAME} ${MANAGE_VERSION}";
}

function doHelp() {
        setOutputMode default;
        echo "${DESCRIPTION}";
        showUsageMessage;
        echo -e "\nActions options:";
        local ifs_save="${IFS}" options
        for action in $(set | $SED -n -e '/^do\S\+ ()\s*$/s/^do\(\S\+\).*/\1/p' | $GREP -v 'Action' | sort); do
            if isFunction "describe${action}Options"; then
                options=$(echo "$options"; describe${action}Options);
            fi
        done
        options="$(sort -u <<< "$options")"
        IFS=$'\n'
        for line in ${options}; do
            writeListEntry -p "  ${line%%*( ):*}" "  ${line##+([^:]):*( )}";
        done
        IFS="${ifs_save}"
        true; 
}

function showActionHelp() {
    local subAction=$1

    isFunction "describe${subAction}" && desc=$(describe${subAction});
    writeListEntry "${subAction}" "${desc:-(no description)}";
    if isFunction "describe${subAction}Parameters"; then
        writeListEntry "\t$(describe${subAction}Parameters)";
    fi
    echo -e "Actions options:";
    if isFunction "describe${subAction}Options"; then
        local ifs_save="${IFS}" options ;
        options=$(describe${subAction}Options) ;
        IFS=$'\n'
        for line in ${options}; do
            writeListEntry -p "  ${line%%*( ):*}" "  ${line##+([^:]):*( )}";
        done
        IFS="${ifs_save}"
    fi
}