#!/bin/bash
#-----------------------------------------------------------------------------------------------------------------------------------
#
# Album Convert
# 
# 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="1.0.0"
declare -g      NAME="album_merge"
declare -g      HELP="usage: [-h | --help] | [-V | --version] | [-T | --test] [-v | --verbose] <source_dir> <target_dir> <album_name> <prefix>"

declare -g SOURCE_DIR=""
declare -g TARGET_DIR=""
declare -g ALBUM_NAME=""
declare -g    PREFIX=""
       
declare -g      MODE="DEFAULT"
declare -g   VERBOSE="FALSE"
declare -g   DRY_RUN="FALSE"





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

am_version_print()
{
    version_print
}





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

am_help_print()
{
    am_version_print
    help_print
}





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

am_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"; am_help_print;    shift;;
	    -V|--version)                                      MODE="EXIT"; am_version_print; shift;;

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

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

    if [[ "${MODE}" != "EXIT" ]]
    then
	if [[ "${#}" != "4" ]]
	then
	    if [[ "${#}" -lt "4" ]]
	    then
		echo_error "Not enough args!"
	    else
		echo_error "Too many args!"
	    fi

	          MODE="EXIT"
	    am_help_print
	else
	    SOURCE_DIR="$1"
	    TARGET_DIR="$2"
	    ALBUM_NAME="$3"
   	        PREFIX="$4"
	fi
    fi
}





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

am_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: [${TARGET_DIR}]   Album_Name: [${ALBUM_NAME}]   Prefix: [${PREFIX}]"

for file in "${SOURCE_DIR}"/*@(.flac|.mp3)
do
             id="$(basename $file | sed -e "s/-.*//")"
    target_file="${TARGET_DIR}/${PREFIX}$(basename $file)"

    cmd_exec cp "${file}" "${target_file}"

    mt_tag_delete "${target_file}" "ALBUM"
    mt_tag_write  "${target_file}" "ALBUM"       "${ALBUM_NAME}"
    mt_tag_delete "${target_file}" "TRACKNUMBER"
    mt_tag_write  "${target_file}" "TRACKNUMBER" "${PREFIX}${id}"
done