#!/bin/bash

#######################################################################################
#Script Name         :bigscript.sh
#Description         :Script to modify the names of the mp3 files
#Author              :Zuzanna Potrzebska
#Email               :zuzia__124@wp.pl
#License             :GPL
#######################################################################################
OPTION=0
HEADER=""
TITLE=""
ARTIST=""
ALBUM=""
YEAR=""
GENRE=""


function main{

    echo "Hello, it’s an mp3 tag editor."
    echo "You can edit here all the names of mp3 files of the chosen directory."
    echo -e -n "Write a path to your files (default: 'pwd'):"
    read PATH
    #echo "Here are all files with mp3 extension from your directory:"
    #echo
    #find $PATH type -f "*mp3"


    echo "What tags do you need in your file name? Select Yes/No." #wybór tagów, które mają znaleźć się w nowej nazwie pliku
    echo "1 - Header"
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) AHEADER="yes";;
            No ) AHEADER="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    echo "2 - Title"
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) ATITLE="yes";;
            No ) ATITLE="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    echo "3 - Artist" $ARTIST
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) AARTIST="yes";;
            No ) AARTIST="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    echo "4 - Album" $ALBUM
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) AALBUM="yes";;
            No ) AALBUM="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    echo "5 - Year of release" $YEAR
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) AYEAR="yes";;
            No ) AYEAR="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    echo "6 - Genre" $GENRE
        select yn in "Yes" "No"; do
            case $yn in
            Yes ) AGENRE="yes";;
            No ) AGENRE="";;
            * ) echo "Please answer yes or no";;
            esac
            done;;

    shopt -s nullglob
    for F in $PATH *.mp3; #pobranie kolejnych zaznaczonych wcześniej tagów
    do
        if [ -n "$AHEADER" ];
            then HEADER=$(easytag --show-tags header $F);
        fi
        if [ -n "$ATITLE" ];
            then TITLE=$(easytag --show-tags title $F);
        fi
        if [ -n "$AARTIST" ];
            then ARTIST=$(easytag --show-tags artist $F);
        fi
        if [ -n "$AALBUM" ];
            then ALBUM=$(easytag --show-tags album $F);
        fi
        if [ -n "$AYEAR" ];
            then YEAR=$(easytag --show-tags year $F);
        fi
        if [ -n "$AGENRE" ];
            then GENRE=$(easytag --show-tags genre $F);
        fi

        chmod 777 $F #dodanie dostępu w celu zmienienia nazwy
        NEWNAME=$($HEADER"-"$TITLE"-"$ARTIST"-"$ALBUM"-"$YEAR"-"$GENRE) #określenie, co będzie się w nazwie znajdować
        mv F $NEWNAME #ponowne nazwanie
        echo $NEWNAME
    done
}

while getopts ":hv" opt; do
    case ${opt} in
        h ) echo "help - First choose the path which in you want to change the names of the mp3 files; leter choose tags.";;
        v ) echo "version - 1.0 by Zuzanna Potrzebska";;
        \? ) echo "Invalid code - choose h, v or nothing";;
    esac
done
main