#! /bin/bash --
[ ! -z "${GREZZO_1577142009}" ] && return; GREZZO_1577142009=0

function feat_addpacks_npm_dev() {
    if ! feat_missing "apt-get"; then
        sudo apt-get update
        sudo apt-get install -y wget curl tar
	elif ! feat_missing "pacman"; then
        sudo pacman -S --needed base-devel wget curl tar
	elif ! feat_missing "apk"; then
        sudo apk add --no-cache wget curl tar bash
	elif ! feat_missing "yum"; then
        sudo yum install wget curl tar
	elif ! feat_missing "zypper"; then
        sudo zypper in wget curl tar
    fi
}

function feat_add_npm() {
    feat_addpacks_npm_dev
	[ -f "$HOME/.bashrc.before" ] || touch "$HOME/.bashrc.before"
	cat - "$HOME/.bashrc.before" <<- EOF > "$HOME/.bashrc.before.tmp"
		export N_PREFIX="\$HOME/.local"
		export PATH="\$N_PREFIX/bin:\$PATH"
	EOF
    mv "$HOME/.bashrc.before.tmp" "$HOME/.bashrc.before"
	feat_bashrc_before_needed
    . "$HOME/.bashrc.before"
    mkdir -p "$N_PREFIX"
    curl -L https://raw.githubusercontent.com/tj/n/master/bin/n | bash -s latest
    npm install -g n
	npm install -g npm-check-updates
}

function npm_initialized() {
    [ -s 'package.json' ]
}

function npm_feat_added() {
	npm list 2>&1 | grep -q "$FEAT@"
}

function npm-g_feat_added() {
	npm list -g 2>&1 | grep -q "$FEAT@"
}

function npm_feat_missing() {
    npm list 2>&1 | grep -q 'missing[^ ]* *'"$FEAT"'@' 
}

function npm_feat_ensure_ncu() {
	if feat_missing "ncu"; then
		npm install -g npm-check-updates
	fi
}

function npm_feat_update_latest() {
	npm_feat_ensure_ncu
	ncu -u
	npm install
}

function npm-g_feat_add() {
	npm install -g npm
	npm install -g "$1"
}

function npm_feat_add() {
	npm install -g npm
	npm install "$1"
}

function npm_feat_ensure() {
	# Ricarica .bashrc.before per eventuali modifiche al PATH
	if [ -f "$HOME/.bashrc.before" ]; then
		source "$HOME/.bashrc.before"
	fi

	# Se npm funziona, ok
	if npm --version >/dev/null 2>&1; then
		return
	fi

	# Altrimenti installiamo tutto
	feat_needed "npm"
}

function npm_feat_needed() {
	npm_feat_ensure
	FEAT="$1"
	npm_feat_ensure_ncu
	if ! npm_initialized; then
		npm init -y
	fi
	if ! npm_feat_added "$FEAT"; then
		if type "npm_feat_add_$FEAT" > /dev/null 2>&1 ; then
			eval "npm_feat_add_$FEAT"
		else
			npm_feat_add "$FEAT"
		fi
	fi
	npm_feat_update_latest
}

function npm-g_feat_needed() {
	npm_feat_ensure
	FEAT="$1"
	if ! npm-g_feat_added "$FEAT"; then
		if type "npm-g_feat_add_$FEAT" > /dev/null 2>&1 ; then
			eval "npm-g_feat_add_$FEAT"
		else
			npm-g_feat_add "$FEAT"
		fi
	fi
}