#!/bin/sh

PREREQUISITES=1
VERBOSE=''
INTERACTIVE=''
MYSQL_ROOT_PW=''
WEBWORK_DB_PW=''

BRANCH=ww3
WWINSTALLURL=https://github.com/aubreyja/ww_install/archive/$BRANCH.tar.gz
THISDIR="$( pwd )"


usage () {
echo "
NAME

  install_webwork.sh

SYNOPSIS

  install_webwork.sh [OPTIONS]

DESCRIPTION

install_webwork.sh is the 'controller' that ties together the other scripts 
in the ww_install package. It opens an install log, downloads this repo and 
opens it in (typically) tmp/. Then it optionally runs install_prerequisites.sh 
followed by ww_install.pl. When ww_install.pl exits, install_webwork.sh attempts 
to open webwork in the system's default web browser, copies webwork_install.log 
to webwork2/logs and then deletes the downloaded installation package.

  --h, --help, --usage

  Print this help message.

  -np, --noprerequisites

  Do not run install_prerequisites.sh before running ww_install.pl. Note that
  ww_install.pl will fail if WeBWorK's dependencies are not installed so be
  sure that you know all of WeBWorK's prerequisites are installed before using
  this option.

  -nv, --no-verbose

  Turns off vebose output. By default all commands that have the option to provide
  verbose output will produce verbose output. This output goes to stdout and to
  webwork_install.log and is helpful for debugging if problems arise. If you
  want to be all cowboy and throw caution into the wind, then this option will
  silence verbose output.

  -ni, --nointeractive

  Run ww_install.pl non-interactively. This option requires setting both
  --mysql_root_pw and --webwork_db_pw.  All other webwork configuration 
  questions asked by ww_install.pl will be answered for you with their 
  default replies. 

  --mysql_root_pw PASSWORD

  Passes the mysql root password to ww_install.pl. Needed to create the webwork
  database. Only required if --no_interactive is set. Otherwise ww_install.pl
  will ask you for it.

  --webwork_db_pw PASSWORD

  Passes the password to use for the webwork database to ww_install.pl. Needed 
  to grant rights to the webwork db to the webwork db user. Only required 
  if --no_interactive is set. Otherwise ww_install.pl will ask you for it.

  AUTHOR

  Written by Jason Aubrey.

  REPORTING BUGS

  View and report bugs at https://github.com/aubreyja/ww_install/issues
  ww_install home page: https://github.com/aubreyja/ww_install

  COPYRIGHT

  This program is Copyright 2013 by Jason Aubrey. This program is free 
  software; you can redistribute it and/or modify it under the terms of 
  the Perl Artistic License or the GNU General Public License as published 
  by the Free Software Foundation; either version 2 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.

  If you do not have a copy of the GNU General Public License write to the Free 
  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
" | less
}

while :
do
    case $1 in
        -h | --h | --help | -help | --usage | -usage | -\?)
            #  Call your Help() or usage() function here.
            usage
            exit 0      # This is not an error, User asked help. Don't do "exit 1"
            ;;
        -np | --noprerequisites | --no-prerequisites | --no-prereqs)
            PREREQUISITES=0
            shift
            ;;
        -nv | --noverbose | --no-verbose)
            VERBOSE='--noverbose' 
            shift
            ;;
        -ni | --nointeractive | --no-interactive)
            INTERACTIVE='--nointeractive' 
            shift
            ;;
        --mysql_root_pw)
            MYSQL_ROOT_PW="--mysql_root_pw $2"
            shift 2
            ;;
        --webwork_db_pw)
            WEBWORK_DB_PW="--webwork_db_pw $2"
            shift 2
            ;;
        --) # End of all options
            shift
            break
            ;;
        -*)
            echo "WARN: Unknown option (ignored): $1" >&2
            shift
            ;;
        *)  # no more options. Stop while loop
            break
            ;;
    esac
done

if [ "$INTERACTIVE" == "--nointeractive" ]
  then
    if [ ! "$MYSQL_ROOT_PW" ]
      then
        echo "ERROR: option --nointeractive requires setting both 
        --mysql_root_pw and --webwork_db_pw"
        exit 1
      fi
    if [ ! "$WEBWORK_DB_PW" ]
      then
        echo "ERROR: option --nointeractive requires setting both 
        --mysql_root_pw and --webwork_db_pw"
        exit 1
    fi
fi

if [ -z "$TMPDIR" ]; then
    if [ -d "/tmp" ]; then
        TMPDIR="/tmp"
    else
        TMPDIR="."
    fi
fi


cd $TMPDIR || exit 1

exec 1> >(tee -a webwork_install.log) 2> >(tee -a webwork_install.log >&2)

date
echo "
-----------------------------
This is the WeBWorK installer.  
-----------------------------

Please report problems to the issue tracker 
at

https://github.com/aubreyja/ww_install

When reporting problems, please include any 
relevant output from the webwork_install.log
"

sleep 2

echo "Working in $TMPDIR"

LOCALINSTALLER="ww_install.tar.gz"

echo
if type curl >/dev/null 2>&1; then
  WWINSTALLDOWNLOAD="curl -k -f -sS -Lo $LOCALINSTALLER $WWINSTALLURL"
elif type fetch >/dev/null 2>&1; then
  WWINSTALLDOWNLOAD="fetch -o $LOCALINSTALLER $WWINSTALLURL"
elif type wget >/dev/null 2>&1; then
  WWINSTALLDOWNLOAD="wget --no-check-certificate -O $LOCALINSTALLER $WWINSTALLURL"
else
  echo "Need wget or curl to use $0"
  exit 1
fi

clean_exit () {
  echo "Cleaning up..."
  [ -f $LOCALINSTALLER ] && rm $LOCALINSTALLER
  [ -d $TMPDIR/ww_install-$BRANCH/ ] && rm -rf $TMPDIR/ww_install-$BRANCH/
  [ -f $THISDIR/install_webwork.sh ] && rm $THISDIR/install_webwork.sh
  exit $1
}

echo "## Download the latest webwork installer"
$WWINSTALLDOWNLOAD 

echo "## Extracting the installer"
tar -xzf $LOCALINSTALLER
rm $LOCALINSTALLER
cd ww_install-$BRANCH/
#mv $TMPDIR/webwork_install.log .

if [ $PREREQUISITES -eq 1 ]; then
  echo "Installing prerequisites..."
  export PERL_MM_USE_DEFAULT=1 #answer yes to any cpan questions
  source ./bin/install_prerequisites.sh 
  wait
fi

perl ./bin/ww_install.pl $VERBOSE $INTERACTIVE $MYSQL_ROOT_PW $WEBWORK_DB_PW
wait

if [ -f "launch_browser.sh" ]; then
  echo "Running launch_browser.sh"
  bash launch_browser.sh 
fi

move_install_log () {
if [ -d "$WEBWORK_ROOT" ]; then
    mv webwork_install.log $WEBWORK_ROOT/logs
    echo "webwork_install.log can be found in $WEBWORK_ROOT/logs"
elif [ -d "$HOME" ]; then
    cp webwork_install.log $HOME
    echo "webwork_install.log can be found in $HOME"
else
    mv webwork_install.log $TMPDIR
    echo "webwork_install.log can be found in $TMPDIR"
fi
}

echo
echo "## Done."
move_install_log
clean_exit 1