#!/usr/bin/env bash

#
#   $Id: fmd-changelog,v 1.3 2025/04/07 00:45:52 snw Exp $
#    Gets the changelog for a specific version
#
#  
#   Author: Serena Willis <snw@coherent-logic.com>
#    Copyright (C) 2025 Coherent Logic Development LLC
#
#
#   This file is part of FreeM.
#
#   FreeM is free software: you can redistribute it and/or modify
#   it under the terms of the GNU Affero Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   FreeM is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU Affero Public License for more details.
#
#   You should have received a copy of the GNU Affero Public License
#   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
#
#   $Log: fmd-changelog,v $
#   Revision 1.3  2025/04/07 00:45:52  snw
#   Enhance fmd-pkg-dpkg to auto-generate the debian/changelog file from the FreeM ChangeLog
#
#   Revision 1.2  2025/04/06 03:38:05  snw
#   Prepare for adding packaging functionality to fmd
#
#   Revision 1.1  2025/04/04 18:00:01  snw
#   *** empty log message ***
#
#
# SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
# SPDX-License-Identifier: AGPL-3.0-or-later
#

MINIMAL=0

function usage() {
    echo
    echo "Prints a FreeM ChangeLog entry"
    echo
    echo "usage:"
    echo
    echo "  fmd changelog [--minimal] [<freem-version>]"
    echo
    echo "  If the '--minimal' flag is specified, will print only the ChangeLog entries"
    echo "  without the version header."
    echo
    echo "  If <freem-version> is omitted, fmd changelog will assume you want the ChangeLog"
    echo "  for the current version in your copy of the repository."    
    echo 
    exit 1
}

if [[ $1 == "help" ]]
then
    usage
fi

if [[ $# == 0 ]]
then
    echo "changelog:  must be run from 'fmd changelog'"
    exit 1
fi

if [[ ! -f sem.ver ]]
then
    echo "Not in the root of the FreeM repository."
    exit 1
fi

if [[ $# < 2 ]]
then
    if [[ $# == 1 ]]
    then
        FREEM_VERSION=$(cat sem.ver)
    else
        usage
    fi
fi

if [[ $# == 2 ]]
then
    if [[ "$2" == "--minimal" ]]
    then
        MINIMAL=1
        FREEM_VERSION=$(cat sem.ver)
    else
        FREEM_VERSION=$2
    fi
elif [[ $# == 3 ]]
then
    if [[ "$2" != "--minimal" ]]
    then
        usage
    fi
    FREEM_VERSION=$3
    MINIMAL=1
fi

VERSTR="VERSION ${FREEM_VERSION}"

egrep "^${VERSTR}" ChangeLog &> /dev/null
RESULT=$?

if [[ ${RESULT} != 0 ]]
then
    echo "setversion:  version ${FREEM_VERSION} not found in ChangeLog"
    exit 1
fi

DIVIDER='********************************************************************************'
INVER=0


while read -r LINE
do    
    if [[ "${LINE}" == "${VERSTR}" ]]
    then
        if [[ ${MINIMAL} == 0 ]]
        then
            echo "${LINE}"
        fi
        INVER=1
    else
        if [[ ${INVER} == 1 ]]
        then
            if [[ "${LINE:0:2}" == '**' ]]
            then
                exit 0
            fi
            if [[ ${MINIMAL} == 0 ]]
            then
                echo "  ${LINE}"
            else
                if [[ "${LINE:0:1}" == '*' ]]
                then
		    OLINE=$(echo "${LINE}" | cut -d\* -f2)
		    echo "${OLINE:1}"
                fi
            fi
        fi        
    fi

done < ChangeLog