#!/bin/bash
#-----------------------------------------------------------------------------------------------------------------------------------
#
# Album SeekPoint
#
# Copyright (C) 2016-2026 Arnaud G. GIBERT
# mailto:arnaud@rx3.net
#
# This is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see
# <https://www.gnu.org/licenses/>.
#
#-----------------------------------------------------------------------------------------------------------------------------------

#-----------------------------------------------------------------------------------------------------------------------------------
# Includes
#-----------------------------------------------------------------------------------------------------------------------------------

: "${RX3_LIB_DIR:=/usr/lib/rx3}"
. "${RX3_LIB_DIR}/music_tools.bash"





#-----------------------------------------------------------------------------------------------------------------------------------
# Global Variables
#-----------------------------------------------------------------------------------------------------------------------------------

declare -g          VERSION="1.1.0"
declare -g             NAME="album_seekpoint"
declare -g             HELP="usage: [-h | --help] | [-V | --version] | [-T | --test] [-v | --verbose] <source_dir> <target_dir> <seek_point_delay>"

declare -g       SOURCE_DIR=""
declare -g       TARGET_DIR=""
declare -g SEEK_POINT_DELAY=""

declare -g             MODE="DEFAULT"
declare -g          VERBOSE="FALSE"
declare -g          DRY_RUN="FALSE"





#-----------------------------------------------------------------------------------------------------------------------------------
# Version Print
#-----------------------------------------------------------------------------------------------------------------------------------

as_version_print()
{
    version_print
}





#-----------------------------------------------------------------------------------------------------------------------------------
# Help Print
#-----------------------------------------------------------------------------------------------------------------------------------

as_help_print()
{
    as_version_print
    help_print
}





#-----------------------------------------------------------------------------------------------------------------------------------
# Arg Parse
#-----------------------------------------------------------------------------------------------------------------------------------

as_args_parse()
{
    tmp_args=$(getopt -o ThVv --long test,help,version,verbose -n "${NAME}" -- "$@")

    if [ $? != 0 ]
    then
        echo "Terminating..." >&2
        exit 1
    fi

    # Note the quotes around `$TEMP': they are essential!
    eval set -- "${tmp_args}"

    while true
    do
	case "$1" in
	    # Options

	    # Mode switches
            -T|--test)                              MODE="TEST";                   shift;;

	    -h|--help)                              MODE="EXIT"; as_help_print;    shift;;
	    -V|--version)                           MODE="EXIT"; as_version_print; shift;;

	    # Global options
            -v|--verbose)                        VERBOSE="TRUE";                   shift;;

	    #
	    --)                                                                    shift;  break;;
	    *) echo "args_parse internal error [$1] !";                                    exit 1;;
	esac
    done

    if [[ "${MODE}" != "EXIT" ]]
    then
        if [[ "${#}" != "3" ]]
	then
	    if [[ "${#}" -lt "3" ]]
	    then
		echo_error "Not enough args!"
	    else
		echo_error "Too many args!"
	    fi

	         MODE="EXIT"
	    as_help_print
	else
	         SOURCE_DIR="$1"
   	         TARGET_DIR="$2"
	   SEEK_POINT_DELAY="$3"
	fi
    fi
}





#-----------------------------------------------------------------------------------------------------------------------------------
# Main
#-----------------------------------------------------------------------------------------------------------------------------------

as_args_parse "$@"



if [[ "${MODE}" == "EXIT" ]]
then
    exit 0
else
    if [[ "${MODE}" == "TEST" ]]
    then
	DRY_RUN="TRUE"
    fi
fi


echo_error "${NAME}: Mode: [${MODE}]   Verbose: [${VERBOSE}]   Source_Dir: [${SOURCE_DIR}]   Target_Dir: [${TARGET_DIR}]   Seek_Point_Delay: [${SEEK_POINT_DELAY}]"

if [[ ! -d "${TARGET_DIR}" ]]
then
    echo_error "Target directory doesn't exist!"
    exit -1
fi

for file in "${SOURCE_DIR}"/*@(.flac)
do
             id="$(basename "${file}" | sed -e "s/-.*//")"
    target_file="${TARGET_DIR}/$(basename "${file}")"

    if [[ "${file}" != "${target_file}" ]]
    then
	cmd_exec cp "${file}" "${target_file}"
    fi

    cmd_exec metaflac --remove --block-type=SEEKTABLE "${target_file}"
    cmd_exec metaflac --add-seekpoint "${SEEK_POINT_DELAY}s" "${target_file}"
done
