#!/usr/bin/env bash
# 20260912 - Hyperling
# "Install" script to get this program runnable from anywhere on the system.

## Variables ##

DIR="$(cd "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
PROJ="$(cd "$DIR"/.. &>/dev/null && pwd)"
PROG="$(basename -- "${BASH_SOURCE[0]}")"
LOCAL=~/bin
GLOBAL="/usr/local"
GLOBAL_BIN="$GLOBAL/bin"
GLOBAL_SRC="$GLOBAL/src"

name_local="prototype.js"
name_short="nomad"
name_long="nomadic-weather"
name_abs="weather-list"

## Functions ##

function usage {
	cat <<- EOF
		$PROG [-h] [-g] [a: b|l|s] [-r]

		Install $name_local to the system. Can be local, global, or removed.

		Parameters)
		  h) Display this message.
		  g) Install globally ($GLOBAL), otherwise local ($LOCAL).
		  a) All names / pseudonyms, rather than choosing from below.
		  b) Basic name, unrelated to being nomadic. ($name_abs)
		  l) Long name, the full name of the project. ($name_long) [Default]
		  s) Short name, the full name of the project. ($name_short)
		  r) Remove / uninstall the project according to the above flags.

		Examples)
		  - Install to the local user with the default name.
		      $PROG
		  - Install to all users with all names.
		      $PROG -ga
		  - Remove all instances.
		      $PROG -ra && $PROG -gra

		Happy weather watching! :)

		~ Hyperling

		https://git.hyperling.com/me/nomadic-weather
	EOF
	exit $1
}

## Validations ##

count=0
while [[ ! -d "$DIR/node_modules" ]]; do
	if (( count > 0 )); then
		echo "Failed to download libraries, please intervene."
		exit 3
	fi
	if [[ -z "`which npm`" ]]; then
		echo "Libraries are missing, please run 'npm install' first."
		exit 2
	else
		echo "Downloading libraries with 'npm install'."
		cd $DIR && npm install
	fi
	count=$(( count++ ))
done

## Parameters ##

while getopts ":gslabrh" arg; do
	case $arg in
		g) global="Y" ;;
		s) short="Y" ;;
		l) long="Y" ;;
		b) abstract="Y" ;;
		a) all="Y" ;;
		r) remove="Y" ;;
		h) usage ;;
		*) echo "ERROR: Parameter $OPTARG was not recognized." && usage 1 ;;
	esac
done

name=""
if [[ "$all" == "Y" || "$abstract" == "Y" ]]; then
	name="$name $name_abs"
fi
if [[ "$all" == "Y" || "$short" == "Y" ]]; then
	name="$name $name_short"
fi
if [[ "$all" == "Y" || "$long" == "Y" || -z "$name" ]]; then
	name="$name $name_long"
fi

termux_check="/sdcard"
if [[ "$global" == "Y" &&  -e "$termux_check" ]]; then
	echo "Detected $termux_check, assuming we are on Termux, global flag disabled."
	global="N"
fi

## Processing ##

cmd=""
dir="$LOCAL"
src="$PROJ"
if [[ "$global" == "Y" ]]; then
	cmd="sudo"
	dir="$GLOBAL_BIN"
	src="$GLOBAL_SRC/`basename "$PROJ"`"
	echo "Requesting sudo privileges... "
	sudo echo "Success!"
fi

if [[ -z "$remove" ]]; then
	cmd="$cmd ln -svf $src/cli/$name_local"
else
	cmd="$cmd rm -v"
fi

## Main ##

# Global Source Code: Install / Removal
if [[ "$global" == "Y" ]]; then
	if [[ "$remove" == "Y" ]]; then
		sudo rm -rfv "$src"
	else
		mkdir -pv "$GLOBAL_SRC"
		sudo cp -Rv "$PROJ" "$GLOBAL_SRC"/
	fi
fi

# Program: Install / Removal
for prog in $name; do
	if [[ ! -d "$dir" ]]; then
		mkdir -pv "$dir"
	fi
	$cmd "$dir/$prog"
done

## Finish ##

echo "Done!"
exit 0