#!/bin/sh
# brick - a simple userspace package manager for blek!OS
# also built on top of pacman
#
# made by alice
# also it is GPL3 only uwu

# settings
set -e

# functions
errcho() {
	# now this was stolen from https://stackoverflow.com/a/2990533
	# uwu
	echo "$@" 1>&2;
}

err() {
	printf "\x1b[1;31m[!]\x1b[0m $@\n" 1>&2;
}

inf() {
	printf "    $@\n"
}

getbrick() {
	echo $BRICKS_DIR/$1.brick
}

brickdb() {
	mkdir -p $BRICKS_DIR/.db

	if ! [ -f $BRICKS_DIR/.db/installed ]; then
		touch $BRICKS_DIR/.db/installed
	fi

	echo $BRICKS_DIR/.db
}

pkg_installed() {
	if [ ! -z $(echo "$BRICKS_INSTALLED" | grep "$1") ]; then
		return 0
	fi
	return 1
}

user_confirm() {
	# base function was stolen from https://stackoverflow.com/a/32708121
	if [ "$AUTOMATIC" == "true" ]; then
		return 0
	fi

	while true; do
		read -r -n 1 -p "${1:-Continue?} [Y/n]: " REPLY
		case $REPLY in
			[yY]) echo ; return 0 ;;
			[nN]) echo ; return 1 ;;
			*) return 0 ;;
		esac 
	done
}

# some vars
BRICKS_DIR=${BRICKS_DIR:-}
PKGS=()
ERRORED=false
AUTOMATIC=false

# setting the BRICKS_DIR var
BRICKS_PWD=$(pwd)

while :; do
	# lets jump to the parent dir until we find the bricks dir
	if [ -d $BRICKS_PWD/bricks ]; then
		# yay we found it ^^
		BRICKS_DIR=$BRICKS_PWD/bricks
		break
	fi
	if [ $BRICKS_PWD = "/" ]; then
		err "Didnt find the bricksdir in this or any parent directory (excluding root)"
		exit 1
	fi
done
unset BRICKS_PWD


BRICKS_DB=$(brickdb)
BRICKS_INSTALLED=$(cat $BRICKS_DB/installed)
# settings the PKGS var
# lets grab those from argv
while [[ $# -gt 0 ]]; do
	case $1 in
		-y|--noconfirm)
			AUTOMATIC=true
			shift;;
		-L)
			inf "listing packages"
			for pkg in $(find $BRICKS_DIR -maxdepth 1 -type f -printf "%f\n" | grep -E \\.brick$ | sed 's/.brick//'); do
				source $(getbrick $pkg)
				inf "$(inf "$pkg - $(info)")"
			done
			inf 'done'
			exit 0
			;;
		-*)
			# meh domt need unkonw args
			shift;;
		*)
			# everything else is a package name however
			PKGS+=("$1")
			shift;;
	esac
done

PPKGS=()

# now step 1 is to check that all packages are there
for pkg in "${PKGS[@]}"; do
	if ! [ -f $(getbrick $pkg) ]; then
		err "Oh no! Brick $pkg is not found in $BRICKS_DIR"
		ERRORED=true
	fi

	if pkg_installed "$pkg"; then
		echo $pkg is installed, skipping
	else
		PPKGS=("${PPKGS[@]}" $pkg)
	fi
done

PKGS=("${PPKGS[@]}")

if [ "$ERRORED" == "true" ]; then
	exit 1
fi

if [ "${#PKGS[@]}" == "0" ]; then
	inf "nothing to do"
	exit
else
	echo "Packages to install: ${PKGS[@]}"
	user_confirm
fi

PACDEPS=()

# lets first collect the packages
for pkg in "${PKGS[@]}"; do
	source $(getbrick $pkg)
	IFS=' ' read -ra DEPS <<< $(pkgs)
	PACDEPS=("${PACDEPS[@]}" "${DEPS[@]}")
done

# so yeah lets do it
if [ "${#PACDEPS[@]}" != "0" ]; then

	# first, gotta filter out the ones that are already installed
	INSTALLED=$(pacman -Qe)
	TO_INSTALL=''
	for pkg in $PACDEPS; do
		if [[ ! -z $(echo $INSTALLED | grep $pkg) ]]; then
			TO_INSTALL="$TO_INSTALL $pkg"
		fi
	done

	inf "installing pacman packages:"
	inf "$TO_INSTALL"

	# welp lets install those
	sudo pacman -S --needed --noconfirm $TO_INSTALL &> $BRICKS_DB/.pacman-log
	PACCODE="$?"
	if ! [ "$PACCODE" == "0" ]; then
		err "pacman exited with code $PACCODE"
		err "pacman's output log is in $BRICKS_DB/.pacman-log"
		exit
	fi
	inf "installed all pacman deps"
else
	inf "no pacman deps to install"
fi

i=1
# pacman deps installed, lets install the actual shit
for pkg in "${PKGS[@]}"; do
	inf "installing $pkg [$i/${#PKGS[@]}]"
	SCRIPT="
	export BRICKS_DIR=$BRICKS_DIR
	export BRICKS_DB=$BRICKS_DB
	source $(getbrick $pkg)\n
	install"
	echo -e "$SCRIPT" | bash > $BRICKS_DB/.$pkg-install-log
	i=$(($i + 1))
done

inf "done"