#!/bin/bash

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

. /usr/global/lib/music.bash





# System Constants
#-----------------------------------------------------------------------------------------------------------------------------------

   AC_NAME="album_convert"
AC_VERSION="$Name: album_convert-1_0_0-1 $"





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

function version_print()
{
    echo ${AC_VERSION} | sed -e 's/.*: //' -e 's/-/ /' -e 's/_/\./g' -e 's/\$$//'
}





# Prin Help
#-----------------------------------------------------------------------------------------------------------------------------------

function help_print()
{
    echo "${AC_NAME} [-h | --help] | [-V | --version] | [-T | --test] [-v | --verbose] [-r | --resample] [-d | --downsampled_tag] <source_dir> <target_dir> [<target_format>]"
}





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

function args_parse()
{
             mode="default"
          verbose="false"
         resample="false"
            dstag="flase"
       source_dir=""
       target_dir=""

    tmp_args=$(getopt -o ThVvrd --long test,help,version,verbose,resample,downsampled_tag -n "${AC_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";    help_print;    shift;;
	    -V|--version)                                      mode="exit";    version_print; shift;;

	    # Global options
            -v|--verbose)                                   verbose="true";                   shift;;
            -r|--resample)                                 resample="true";                   shift;;
            -d|--downsampled_tag)                             dstag="true";                   shift;;

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

    if [[ "${mode}" != "exit" ]]
    then
        if [[ "${#}" != "2" ]]
	then
	    if [[ "${#}" -lt "2" ]]
	    then
		echo "Not enough args!"
	    else
		echo "Too many args!"
	    fi

	    mode="exit"
	    help_print
	else
	   source_dir="$1"
	   target_dir="$2"
	fi
    fi
}





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

args_parse "$@"

if [[ "${mode}" == "exit" ]]
then
    exit 0
else
    if [[ "${mode}" == "test" ]]
    then
	dry_run=true
    else
	dry_run=false
    fi
fi

if [[ "${resample}" == "true" ]]
then
    resample_flags="-af \"aresample=out_sample_fmt=s16:out_sample_rate=44100\""
else
    resample_flags=""
fi



echo "mode: [${mode}]   verbose: [${verbose}]   resample : [${resample}]   downsampled_tag : [${dstag}]   source_dir: [${source_dir}]   target_dir: [${target_dir}]" 1>&2

if [[ ! -d "${target_dir}" ]]
then
    echo "Target directory doesn't exit !"
    exit -1
fi

for file in "${source_dir}"/*@(.flac|.ogg|.mp3|.m4a|.ape|.wav)
do
             id="$(basename "${file}" | sed -e "s/-.*//")"
    target_file="${target_dir}/${prefix}$(basename "${file}" | sed -e 's/\.[^.]*$//').flac"

    cmd="ffmpeg -i \"${file}\" -compression_level 12 ${resample_flags} \"${target_file}\""
    exec_cmd "${cmd}"
done

if [[ ${resample} == "true" ]]
then
    for file in "${target_dir}"/*.flac
    do
	if [[ "${dstag}" == "true" ]]
        then
	    tag="DESCRIPTION"

	    value="$(tag_read "${file}" "${tag}")"

	    if [[ "$( echo "${value}" | grep "Downsampled")" == "" ]]
	    then
		value="${value}\nDownsampled"
		tag_delete "${file}" "${tag}"
		tag_write  "${file}" "${tag}" "${value}"
	    fi
	fi

	for tag in "ALBUM" "TITLE"
	do
	        value="$(tag_read "${file}" "${tag}")"
	    new_value="$(echo ${value} | sed -e 's/ - HD$//')"

	    if [[ "${value}"  != "${new_value}" ]]
	    then
		tag_delete "${file}" "${tag}"
		tag_write  "${file}" "${tag}" "${new_value}"
	    fi
	done

	cmd="mv \"${file}\" \"${file/-hd.flac/.flac}\""
	exec_cmd "${cmd}"
    done
fi