#!/bin/bash

missingCommands=""

npm --version > /dev/null 2>&1

if [ $? -ne 0 ]; then
    missingCommands="- npm"
fi

xdg-open --version > /dev/null 2>&1

if [ $? != 0 ]; then
    missingCommands="${missingCommands}\n- xdg-utils"
fi

curl --version > /dev/null 2>&1

if [ $? != 0 ]; then
    missingCommands="${missingCommands}\n- curl"
fi

if [ "$missingCommands" != "" ]; then
    echo -e "You have to install the following commands before installing this extension:\n$missingCommands"
    exit 1
fi

which instant-markdown-d > /dev/null 2>&1

if [ "$?" -ne 0 ]; then
    echo "This plugin needs you to install the following NPM package: https://www.npmjs.com/package/instant-markdown-d"
    echo "Please install it and restart this script to activate this plugin."
    exit 1
fi

echo "Activating Markdown support..."

sudo npm -g install instant-markdown-d

cat ~/.vimrc | sed "s/\" Plugin 'suan\/vim-instant-markdown'/Plugin 'suan\/vim-instant-markdown'/" > ~/.vimrc.tmp
rm ~/.vimrc
mv ~/.vimrc.tmp ~/.vimrc
vim +PluginInstall +qall

echo "Markdown support has been activated!"
echo "If you like this plugin, don't forget to send your ♥ to its author: https://github.com/suan/vim-instant-markdown"