#!/usr/bin/env bash

provide_version='0.5'
dm_version='0.3.15'

base=$1
dbuser=$2
dbpass=$3
domain=$4
secret=$5

echo "Checking input values..." 
echo "  path=$base"
echo "  dbuser=$dbuser"
echo "  dbpass=$dbpass"
echo "  domain=$domain"
echo "  secret=$secret"
echo


if [ -z $base ] || [ -z $dbuser ] || [ -z $dbpass ] || [ -z $domain ] || [ -z $secret ]
then
    echo "Error: Not enough input parameters. Usage info:"
    echo
    echo "provide-provide-$provide_version PATH DBUSER DBPASS DOMAIN SECRET"
    echo 
    echo "  PATH    Path to existing dir, like ~ (for example)."
    echo "  DBUSER  Name of existing database user."
    echo "  DBPASS  Password of existing database user."
    echo "  DOMAIN  Name of domain that will be served by Provide."
    echo "  SECRET  Long random string, for security protocols."
    echo 
    exit 1
fi


echo "Checking your platform capabilities...."
check ()
    if ! (which $@)
    then
        echo "Error: Can't find '$@' on your platform. Please either create a symlink to your favorite '$@' program, or install this program. Then run this script again."
        exit 1
    fi
check 'cp'
check 'editor'
check 'env'
check 'mkdir'
check 'perl'
check 'python'
check 'rm'
check 'sleep'
check 'tar'
check 'wget'

echo "Checking your Python capabilities...."
checkPython () {
    echo "$1"
    if ! (python -c "import $1" >/dev/null 2>&1)
    then
        echo "Error: Can't find Python module '$1'."
        echo ""
        echo "Please install this Python module (in Debian, this package is call
ed '$2'). Then run this script again."
        echo ""
        exit 1
    fi
}
checkPython 'PIL' 'python-imaging'
checkPython 'django' 'python-django'
checkPython 'simplejson' 'python-simplejson'
checkPython 'mx.DateTime' 'python-egenix-mxdatetime'
checkPython 'psycopg' 'python-psycopg'
echo "Your Python checks out OK."
echo


# todo: Fix this for earlier versions of bash (conditional binary operator).
#if [[$base =~ '^[^\/]']]
#then
#    echo "Sorry, the path argument needs to be an absolute path."
#    exit 1
#fi

if [ ! -e $base ]
then
    echo "Error: Installation path '$1' not found."
    exit 1
fi

if [ ! -d $base ]
then
    echo "Error: Installation path '$1' not a directory."
    exit 1
fi

base=${base//%\//}
livebase="$base/provided"
live="$livebase/$provide_version"

if [ -e $live ]
then
    echo "This version of Provide is already installed under $base."
    echo
    echo "Reinstallation will not be attempted. To remove this Provide installation, drop the 'provide-$provide_version' database and remove the '$live' directory. Make sure you really want to do this!!"
    echo
    exit 1
fi

echo "Your platform checks out OK."
echo
sleep 4

if [ -e $livebase ]
then
    echo "Installation dir $livebase already exists..."
else
    echo "Making installation dir $livebase..."
    mkdir $livebase || exit 1
fi

echo "Installing Provide to $live..."

echo "Making installation dir $live..."
mkdir $live || exit 1
echo "Making lib/python dir..."
mkdir $live/lib
mkdir $live/lib/python

echo "Augmenting PYTHONPATH environment variable..."
sleep 1
export PYTHONPATH=$live/lib/python:$PYTHONPATH 
echo "export PYTHONPATH=$PYTHONPATH"

echo "Fetching domainmodel distribution..."
sleep 1
wget -O domainmodel-$dm_version.tar.gz http://appropriatesoftware.net/provide/docs/domainmodel-$dm_version.tar.gz || exit 1

echo "Installing domainmodel..."
sleep 1
tar zxvf domainmodel-$dm_version.tar.gz
cd domainmodel-$dm_version
python setup.py install --home=$live || exit 1
cd ..
rm domainmodel-$dm_version.tar.gz
rm -rf domainmodel-$dm_version

echo "Fetching Provide distribution..."
sleep 1
wget -O provide-$provide_version.tar.gz http://appropriatesoftware.net/provide/docs/provide-$provide_version.tar.gz || exit 1

echo "Installing Provide..."
sleep 1
tar zxvf provide-$provide_version.tar.gz
cd provide-$provide_version
python setup.py install --home=$live || exit 1
cd ..
rm provide-$provide_version.tar.gz
rm -rf provide-$provide_version
cd $live

echo "Copying new config file..."
sleep 1
cp etc/provide.conf.new etc/provide.conf
echo "Setting config file paths..."
sleep 1
perl -pi -e "s|/path/to/provide|$live|" etc/provide.conf
perl -pi -e "s|^name = provide\S*|name = provide-$provide_version|" etc/provide.conf
perl -pi -e "s|^user = provide|user = $dbuser|" etc/provide.conf
perl -pi -e "s|^password = pass|password = $dbpass|" etc/provide.conf
perl -pi -e "s|^domain_name = provide\.your\.domain|domain_name = $domain|" etc/provide.conf
perl -pi -e "s|^secret_key = \S+|secret_key = $secret|" etc/provide.conf

echo "Opening new config file (please check the values)..."
sleep 3
editor etc/provide.conf

echo "Setting environment variables..."
sleep 1
export PYTHONPATH=$live/lib/python
export PROVIDE_SETTINGS=$live/etc/provide.conf
export PATH=$live/bin:$PATH
echo "Searching for 'provide' program...."
which provide || echo "Error: Can't find the 'provide' program on your system. :-("
echo "Creating model persistence..."
sleep 1
provide db create || exit 1
echo "Initialising model..."
sleep 1
provide db init || exit 1
echo ""
echo "Provide installed OK. Thanks for using Provide."
echo ""
echo "Please paste these variables in your environment configuration:"
sleep 1
echo ""
echo "export PROVIDE_SETTINGS=$live/etc/provide.conf"
echo "export PYTHONPATH=$live/lib/python"
echo "export PATH=$live/bin:\$PATH"
echo ""
echo "Then you can run the provide commands:"
echo ""
echo "provide scripts scanbooker 0.17"
echo ""
echo "provide-scanbooker-init"
echo "provide-scanbooker-0.17-init"
echo "provide-scanbooker-0.17-accept"
echo "provide-scanbooker-0.17-production"
echo ""
echo "This would initialise a ScanBooker application service provision,"
echo "aquire relase 0.17, and then test and deploy a production services."
sleep 1