install.sh

#!/usr/bin/env bash

# Get current location of this script
DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

LINKS_ONLY=false
INSTALLER="Unknown"
declare -a TARGET_APPS

detect_package_manager() {
	if [ -n "$PREFIX" ] && command -v pkg >/dev/null; then
		INSTALLER="pkg install -yq"
	elif command -v apt-get >/dev/null; then
		INSTALLER="sudo apt-get install -yq"
	elif command -v dnf >/dev/null; then
		INSTALLER="sudo dnf install -yq"
	elif command -v yum >/dev/null; then
		INSTALLER="sudo yum install -yq"
	elif command -v pacman >/dev/null; then
		INSTALLER="sudo pacman -S --noconfirm"
	elif command -v zypper >/dev/null; then
		INSTALLER="sudo zypper install -yq"
	elif command -v pkg >/dev/null; then
		INSTALLER="sudo pkg install -yq"
	fi
}

install_app() {
	local app_dir="$1"

	if [ $LINKS_ONLY = true ]; then
		echo "Setting symlinks for $app_dir"
		get_symlinks "$app_dir"
	else
		echo "Installing $app_dir..."
		install_requirements "$app_dir"
		execute_install_script "$app_dir"
		get_symlinks "$app_dir"
	fi
}

install_requirements() {
	local app_dir="$1"
	if [[ -f "$app_dir/requirements.txt" ]]; then
		while IFS= read -r requirement || [[ -n "$requirement" ]]; do
			if [[ -z "$requirement" ]]; then
				continue
			fi
			echo "Found requirement: $requirement"
			install_app "$requirement"
		done <"$app_dir/requirements.txt"
	fi
}

execute_install_script() {
	local app_dir="$1"
	if [[ -f "$app_dir/install.sh" ]]; then
		echo "Launching $app_dir install.sh"
		(cd "$app_dir" && bash install.sh)
	fi
}

get_symlinks() {
	local app_dir="$1"
	if [[ -f "$app_dir/symlinks.txt" ]]; then
		while IFS= read -r link || [[ -n $link ]]; do
			[[ "$link" =~ ^# || -z "$link" ]] && continue
			while [[ $link =~ \$DIR || $link =~ \$HOME ]]; do
				link=${link/\$DIR/$DIR}
				link=${link/\$HOME/$HOME}
			done
			eval src="${link%=*}"
			eval dest="${link#*=}"
			src=${src%/}
			dest=${dest%/}
			create_symlink "$src" "$dest"
		done <"$app_dir/symlinks.txt"
	fi
}

create_symlink() {
	local src=$1
	local dest=$2

	if [ ! -e "$src" ]; then
		echo "Source $src does not exist. Skipping..."
		return
	fi

	if [ -e "$dest" ] || [ -L "$dest" ]; then
		echo "Removing existing file or symlink at $dest"
		rm -rf "$dest"
	fi

	mkdir --parents "$(dirname "$dest")"
	echo "Creating symlink $src -> $dest"
	ln -s "$src" "$dest"
}

parse_args() {
	if [ "$#" -eq 0 ]; then
		echo "No arguments provided. Use --all to install all or specify individual apps."
		exit 1
	fi

	while (("$#")); do
		case "$1" in
		-l | --links)
			LINKS_ONLY=true
			shift
			;;
		*)
			if [[ -d $1 ]]; then
				TARGET_APPS+=("$1")
			else
				echo "Warning: '$1' is not a recognized app directory."
			fi
			shift
			;;
		esac
	done
}

main() {
	parse_args "$@"
	detect_package_manager
	export INSTALLER
	for app in "${TARGET_APPS[@]}"; do
		install_app "$app"
	done
	echo "Installation complete."
}

main "$@"