#!/usr/bin/env bash

# ===Note for contributors========================================================================================================================

# This script interactively asks the user for the options to call AAXtoMP3 with. This first version does not include all options of AAXtoMP3
# since I tried to keep the dialog short, but I added an --advanced option, which is unused right now, but might be used in the future to add
# more options which only show up if explicitely wanted.
# If you want to add functionality please consider, whether the functionality you add might belong to the advanced options.

# ===Variables====================================================================================================================================

# Usage synopsis
usage=$'\nUsage: interactiveAAXtoMP3 [--advanced] [--help]\n'
# Help mesaage
help=$'\nUsage: interactiveAAXtoMP3 [--advanced] [--help]\n
--advanced	More options
--help		Print this message\n'
summery=""         # This will contain a summery of the options allready set.
call="./AAXtoMP3"  # This will contain the call for AAXtoMP3.
isnum='^[0-9]+$'   # This is needed to check whether a variable is a number.
advanced=0         # Toggles Advanced options on or off.

# ===Options======================================================================================================================================

while true; do
  case "$1" in
                      # Advanced options.
    -a | --advanced   ) advanced=1;                                                                                  shift ;;
                      # Command synopsis.
    -h | --help       ) echo -e "$help";                                                                            exit ;;
                      # Anything else stops command line processing.
    *                 ) echo -e "$usage";                                                                            exit ;;
  esac
done

# ===Get options for AAXtoMP3=====================================================================================================================

# ===Codec===
while true; do
  clear;
  read -p "codec (mp3/m4a/m4b/flac/aac/opus): " codec
  if [[ "$codec" = "mp3" ]]; then summery="$summery""codec: $codec"; call="$call -e:mp3"; break
  elif [[ "$codec" = "m4a" ]]; then summery="$summery""codec: $codec"; call="$call -e:m4a"; break
  elif [[ "$codec" = "m4b" ]]; then summery="$summery""codec: $codec"; call="$call -e:m4b"; break
  elif [[ "$codec" = "flac" ]]; then summery="$summery""codec: $codec"; call="$call --flac"; break
  elif [[ "$codec" = "aac" ]]; then summery="$summery""codec: $codec"; call="$call --aac"; break
  elif [[ "$codec" = "opus" ]]; then summery="$summery""codec: $codec"; call="$call --opus"; break
  fi
done

# ===Compression===
while true; do
  clear; echo -e "$summery"
  if [[ "$codec" = "mp3" ]]; then maxlevel=9
  elif [[ "$codec" = "flac" ]]; then maxlevel=12
  elif [[ "$codec" = "opus" ]]; then maxlevel=10
  else break
  fi
  read -p "compression level (0-$maxlevel): " compression
  if [[ ${compression} =~ $isnum ]] && [[ "$((${compression} > -1))" == "1" ]] && [[ "$((${compression} < ${maxlevel}+1))" == "1" ]]; then
    summery="$summery""\ncompression level: $compression"
    call="$call --level $compression"
    break
  fi
done

# ===Chapters===
while true; do
  clear; echo -e "$summery"
  read -p "chapters (yes/no/chapternumber to continue with): " chapters
  if [[ ${chapters} =~ $isnum ]]; then summery="$summery""\nchapters: $chapters"; call="$call -c --continue ${chapters}"; break
  elif [[ "$chapters" = "yes" ]] ; then summery="$summery""\nchapters: $chapters"; call="$call -c"; break
  elif [[ "$chapters" = "no" ]] ; then summery="$summery""\nchapters: $chapters"; call="$call -s"; break
  fi
done

# ===Authcode===
if ! [ -r .authcode ] || [ -r ~/.authcode ]; then
  clear; echo -e "$summery"
  read -p "Authcode: " authcode
  summery="$summery""\nauthcode: $authcode"
  call="$call -A $authcode"
fi

# ===Loglevel===
while true; do
  clear; echo -e "$summery"
  read -p "loglevel (0/1/2/3): " loglevel
  if [[ ${loglevel} =~ $isnum ]] && [[ "$((${loglevel} > -1))" == "1" ]] && [[ "$((${loglevel} < 4))" == "1" ]]; then
    summery="$summery""\nloglevel: $loglevel"
    call="$call -l $loglevel"
    break
  fi
done

# ===File===
clear; echo -e "$summery"
read -p "aax-file: " file
summery="$summery""\naax-file: $file"
call="$call $(echo $file | sed "s;~;$HOME;")"

# ===Summerize chosen options and call AAXtoMP3===================================================================================================

# ===Summery===
clear; echo -e "$summery\n"
echo -e "$call\n"
# -----

# ===Call AAXtoMP3===
$call