#!/usr/bin/env bash

# Find ZendTo top directory.
# It's either set in $ZENDTOPREFS, or else it's /opt/zendto, or else
# we can't find it so bail out.
if [ "x$ZENDTOPREFS" != "x" ]; then
  ZENDTO=$( echo "$ZENDTOPREFS" | sed -e 's/\/[^\/]*$//; s/\/[^/]*$//;' )
else
  ZENDTO=/opt/zendto
fi
if [ "x$ZENDTO" = "/" ] || [ "x$ZENDTO" = "/opt" ] || [ ! -d "$ZENDTO" ]; then
  echo "I cannot find the ZendTo directory!"
  exit 1
fi

BIN="$ZENDTO/bin"
CONFIG="$ZENDTO/config"
LOCALE="$ZENDTO/config/locale"

###################################################
# Work out the OS name ($OS) and version ($OSVER).
# Taken from my ZendTo installer
###################################################
OS=unknown
OSRELEASE=/etc/redhat-release
if [ -f $OSRELEASE ]; then
  if grep -q 'Red *Hat' $OSRELEASE; then
    OS=redhat
  elif grep -q 'CentOS' $OSRELEASE; then
    OS=centos
  fi
  if [ -x /bin/yum -o -x /usr/bin/yum ]; then
    rpm -q --quiet perl || {
      shout Just going to install Perl...
      yum -y install perl
    }
  fi
  OSVERFULL="$( perl -pe 's/^[^\d]+([\d.]+).*?$/$1/' < $OSRELEASE )"
  OSVER="$( echo "$OSVERFULL" | cut -d. -f1 )"
fi
if [ "$OS" = "unknown" ]; then
  OSRELEASE=/etc/debian_version
  if [ -f $OSRELEASE -a -x /usr/bin/lsb_release ]; then
    # Should give me the string "ubuntu" or "debian"
    OS="$( lsb_release --id | sed -e 's/^.*:\s*//' | tr '[:upper:]' '[:lower:]' )"
    OSVER="$( lsb_release --release | sed -e 's/^.*:\s*\([0-9]*\).*$/\1/' )"
  fi
fi
if [ "$OS" = "unknown" ]; then
  if [ -x /usr/bin/lsb_release ]; then
    # Should give me the string "suse" or similar
    OS="$( lsb_release --id | sed -e 's/^.*:\s*//' | tr '[:upper:]' '[:lower:]' )"
    OSVER="$( lsb_release --release | sed -e 's/^.*:\s*\([0-9]*\).*$/\1/' )"
    # But we need to tell between suse (i.e. sles) and opensuse
    if [ "x$OS" = "xsuse" ]; then
      OS='sles'
    fi
  elif [ -f /etc/os-release ]; then
    # I can just source that file, but that's dangerous
    OSID="$( grep '^ID=' /etc/os-release | head -1 | sed -e 's/#.*$//; s/ *$//; s/^ID="*\([^"]*\)"*/\1/;' )"
    if [[ $OSID =~ sles ]]; then
      OS='sles'
    elif [[ $OSID =~ opensuse ]]; then
      OS='opensuse'
    elif [[ $OSID =~ debian ]]; then
      OS='debian'
    fi
    OSVER="$( grep '^VERSION_ID=' /etc/os-release | head -1 | sed -e 's/#.*$//; s/ *$//; s/^VERSION_ID="*\([^"]*\)"*/\1/; s/\..*$//;' )"
  fi
fi

OS="$(echo "$OS" | tr '[:upper:]' '[:lower:]')" # Lower-case it

###################################################

L="$1"
BAILOUT="$2"

if [ "x$L" = "x" ]; then
  echo
  echo You need to supply a valid language code on the command-line,
  echo such as en_US or fr_FR or similar.
  echo "Do not put anything like '.utf-8' on the end,"
  echo as everything is done in utf-8 anyway.
  echo
  if [ "x$OS" = "xredhat" ] || [ "x$OS" = "xcentos" ]; then
    echo To see the codes valid on your system, run the command
    echo '   locale -a'
    echo
  fi
  exit 1
fi

if echo "$L" | fgrep -q .; then
  echo 'Do you *really* need the "." and whatever is after it?'
  echo "I'm going to wait for 10 seconds so you can press Ctrl-C"
  echo "and try again without it."
  sleep 10
  echo
fi

echo
if locale -a | grep -q '^'"$L"'$'; then
  echo Adding $L as a valid language code.
elif [ "x$OS" = "xubuntu" ] || [ "x$OS" = "xdebian" ]; then
  echo Adding the locale $L for you.
  if [ "x$OS" = "xdebian" -a "$OSVER" -ge "9" ]; then
    # On Debian 9 we have to __manually edit__ /etc/locale.gen,
    # then run locale-gen with no command-line parameters!!!
    # WTF ???
    if grep -q '^'$L' ' /etc/locale.gen; then
      # It's already there, no need to tweak locale-gen
      :
    else
      # Uncomment the line in locale.gen that is the code we want
      # Create lots of backups!
      sed -i.bak."$L" -e 's/^# *\('"$L"' .*\)$/\1/' /etc/locale.gen
    fi
    [ "x$BAILOUT" = "x" ] && locale-gen
  else
    locale-gen "$L"
  fi
else
  echo Sorry, that is not a valid language code on your system.
  echo To see the codes valid on your system, run the command
  echo '   locale -a'
  echo On some operating systems, you may need to install additional
  echo software packages to add extra languages.
  echo
  exit 1
fi

if [ ! -f "$LOCALE/$L/LC_MESSAGES/zendto.po" ]; then
  mkdir -p "$LOCALE/$L"
  echo And now about to copy the translation source into
  echo "$LOCALE/$L/LC_MESSAGES/zendto.po"
  echo so you can start adding your own translations.
  echo
  echo Pausing for 10 secs...
  sleep 10
fi

# Only do the makelanguages if they have *not* put a 2nd arg on the command.
# The deb postinst file calls this with NO on the end to save duplicating
# this code.
[ "x$BAILOUT" = "x" ] && "$BIN"/makelanguages

exit 0