#!/usr/bin/env bash

provide_version='0.3'
dm_version='0.2.1'

base=$1

if [ ! $base ]
then
    echo "Where do you want to install provide? Need an absolute path."
    exit 1
fi

echo "Checking your system capabilities...."
check ()
    if ! (which $@)
    then
        echo "Error: Can't find '$@' on your system. 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 "Your system checks out OK."

# 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"

echo "Installing provide to $live..."

if [ -e $live ]
then
    echo "Error: Installation dir $live already exists."
    exit 1
fi

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

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|$live|" etc/provide.conf
editor etc/provide.conf
echo "Setting environment variables..."
sleep 1
export PYTHONPATH=$live/lib/python
export PROVIDE_SETTINGS=$live/etc/provide.conf
export PATH=$live/bin:$PATH
echo "Searching for 'provide' program...."
which provide || echo "Error: Can't find the 'provide' program on your system. :-("
echo "Creating model persistence..."
sleep 1
provide db create || exit 1
echo "Initialising model..."
sleep 1
provide db init || exit 1
echo ""
echo "Provide installed OK. Thanks for using provide."
echo ""
echo "Please write these variables in your environment configuration:"
sleep 1
echo ""
echo "export PROVIDE_SETTINGS=$live/etc/provide.conf"
echo "export PYTHONPATH=$live/lib/python"
echo "export PATH=$live/bin:\$PATH"
echo ""
echo "Then you can run scripts like 'provide-kforge-0.13'."
echo ""
sleep 1