#!/bin/bash

####################################################################
# Feature Management
#
# This script doesn't really contribute to the build itself,
# but provides a simple interface to enable/disable certain build
# features
####################################################################

featcmd=$1
shift
featname=$1
shift

function print-usage() {
    echo ${1:-"No feature name specified"}
    echo "Usage: "
    echo "    iqproj feat enable|disable featurename"
    exit 1;
}

function write-app-templates() {
    module_name=$(cat package.json | jq -r .name)

    #################################
    # app/index.html
    if [ ! -f app/index.html ]; then
cat << EOF > app/index.html
    <html>
        <head>
            <title>$module_name</title>
            <link rel="stylesheet" type="text/css" href="$module_name.scss" />
        </head>
        <body>
            <h1>It Works!</h1>

            <script src="app.js"></script>
        </body>
    </html>
EOF
    fi

    #################################
    # app/index.js
    if [ ! -f app/index.js ]; then
cat << EOF > app/index.js
var $module_name = require('../src');

console.log('$module_name initialized: ', $module_name);
EOF
    fi

}

if [ -z "$featname" ]; then
    print-usage;
fi

case $featname in
    'app')
        npm_packages=(
            browserify
            browserify-istanbul
            karma
            jasmine
            karma-jasmine
            karma-browserify
            karma-chrome-launcher
            karma-phantomjs-launcher
            watchify
            exorcist
            phantomjs
            express
            tiny-lr
            connect-livereload
            node-sass
            yargs
        )

        case $featcmd in
            'enable')
                # install dependencies
                npm install --save-dev "${npm_packages[@]}"
                npm uninstall --save-dev tape

                # create some app scaffolding... not super useful but meh
                mkdir -p app
                write-app-templates

                # update the npm scripts
                tmpfile=$(mktemp -t XXXXXXXX)
                cat package.json | jq '.scripts.test = "bin/iqb karma"' | jq '.scripts.preversion = "bin/iqb karma"' > $tmpfile
                mv $tmpfile package.json 

                echo
                echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
                echo "!!! WARNING: testing framework switched to karma; tape tests won't work in karma."
                echo "!!! You will need to update all *.spec.js files accordingly.                     "
                echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
                ;;
            'disable')
                npm install --save-dev tape
                npm uninstall --save-dev "${npm_packages[@]}"

                # update the npm scripts
                tmpfile=$(mktemp -t XXXXXXXX)
                cat package.json | jq '.scripts.test = "bin/iqb test"' | jq '.scripts.preversion = "bin/iqb test"' > $tmpfile
                mv $tmpfile package.json 

                echo
                echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
                echo "!!! WARNING: testing framework switched to tape; karma tests won't work in tape."
                echo "!!! You will need to update all *.spec.js files accordingly.                     "
                echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
                ;;
            *)
                print-usage "feat: unknown command $featcmd"
                exit 1;
                ;;
        esac
    ;;

    'headless')
        case $featcmd in
            'enable')
                npm install --save-dev karma-script-launcher
                npm uninstall --save-dev phantomjs karma-phantomjs-launcher
                tmpfile=$(mktemp -t XXXXXXXX)
                cat karma.conf.json | jq '.browsers = ["bin/headless"]' > $tmpfile
                mv $tmpfile karma.conf.json
                ;;
            'disable')
                npm uninstall --save-dev karma-script-launcher
                npm install --save-dev phantomjs karma-phantomjs-launcher
                tmpfile=$(mktemp -t XXXXXXXX)
                cat karma.conf.json | jq '.browsers = ["PhantomJS"]' > $tmpfile
                mv $tmpfile karma.conf.json
                ;;
            *)
                print-usage "feat: unknown command $featcmd"
                exit 1;
                ;;
        esac
    ;;


    *)
        echo "Unknown feature $featname";
        exit 1;
    ;;
esac

featflag="false"
if [ "$featcmd" = "enable" ]; then
    featflag="true"
fi

tmpfile=$(mktemp -t XXXXXXXX)
cat package.json | jq ".iqproj += { $featname: $featflag }" > $tmpfile;
mv $tmpfile package.json