#!/bin/bash
#-----------------------------------------------------------------------------------------------------------------------------------
#
# Album MetaData Load
#
# 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_metadata_load"
declare -g          HELP="usage: [-h | --help] | [-V | --version] | [-T | --test] [-v | --verbose] [-c | --clean] <Source_Dir> <Target_Dir> <MetaData_File>"

declare -g         CLEAN="FALSE"
declare -g    SOURCE_DIR=""
declare -g    TARGET_DIR=""
declare -g METADATA_FILE=""

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





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

aml_version_print()
{
    version_print
}





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

aml_help_print()
{
    aml_version_print
    help_print
}





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

aml_args_parse()
{
    tmp_args=$(getopt -o ThVvc --long test,help,version,verbose,clean -n "${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"; aml_help_print;    shift;;
	    -V|--version)                                      MODE="EXIT"; aml_version_print; shift;;

	    # Global options
            -v|--verbose)                                   VERBOSE="TRUE";                    shift;;
            -c|--clean)                                       CLEAN="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"
	    aml_help_print
	else
	      SOURCE_DIR="$1"
	      TARGET_DIR="$2"
	   METADATA_FILE="$3"
	fi
    fi
}





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

aml_args_parse "$@"



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


echo_error "${NAME}: Mode: [${MODE}]   Verbose: [${VERBOSE}]   Clean: [${CLEAN}]   Source_Dir: [${SOURCE_DIR}]   Target_Dir: [${TARGET_DIR}]   MetaData_File: [${METADATA_FILE}]"

mt_tagtab_alloc

echo_error "Reading MetaData..."

mt_tagtab_load "${METADATA_FILE}" "DEFAULT"

nb_track=${track_id}
echo_error "Nb track found: ${nb_track}"

track_id=1

find "${SOURCE_DIR}" -maxdepth 1 -name '*.flac' -o -name '*.mp3' | sort |
    (
        while read track_file
        do
	    mt_tag_get title "${track_id}" "TITLE"

   	         suffix="${track_file##*.}"
	    target_file="$(printf "%02d" ${track_id})-${title}.${suffix}"
	    target_file="$(mt_fix_file_name "${target_file}" "")"
	    target_file="${TARGET_DIR}/$(mt_fix_file_name "${target_file}" "")"

	    echo_error "Copying ${track_file} into ${target_file}"
            cmd_exec cp "${track_file}" "${target_file}"

	    if [[ "${CLEAN}" == "TRUE" ]]
            then
	        mt_tag_save "${target_file}" "${track_id}" "CLEAN"
	    else
	        mt_tag_save "${target_file}" "${track_id}" "NOCLEAN"
	    fi

	    track_id=$((${track_id} + 1))
        done
    )