#!/bin/sh
# deepkut agent installer bootstrap — served at https://get.deepkut.app
#
#   curl -fsSL https://get.deepkut.app | sh
#
# TEMPORARY pre-launch edition: fetches the agent as a tarball from this same
# host instead of git-cloning the public repo (which doesn't exist yet). Same
# handoff, same promises: downloads the agent, runs its interactive setup,
# never sudo, never outside the install folder. Swap for the git edition in
# deploy/get.sh at launch (deploy/get.deepkut.app.md, step 2).
#
# The entire body is a function and the last line calls it: a truncated
# download defines a function nobody calls and does nothing at all.

set -eu
(set -o pipefail) 2>/dev/null && set -o pipefail

main() {
	TARBALL=${DEEPKUT_TARBALL:-https://get.deepkut.app/agent.tar.gz}
	DIR=${DEEPKUT_DIR:-$HOME/deepkut-agent}

	if [ -t 1 ]; then
		P=$(printf '\033[95m'); B=$(printf '\033[1m'); D=$(printf '\033[2m')
		R=$(printf '\033[31m'); O=$(printf '\033[0m')
	else
		P=; B=; D=; R=; O=
	fi

	say()  { printf '%s\n' "$*"; }
	note() { printf '%s%s%s\n' "$D" "$*" "$O"; }
	die() {
		printf '\n%s✗ %s%s\n' "$R" "$*" "$O" >&2
		printf '\n%syou can always do it by hand instead:%s\n' "$D" "$O" >&2
		printf '  curl -fsSL %s | tar -xz -C %s\n' "$TARBALL" "$DIR" >&2
		printf '  cd %s && ./install.sh\n\n' "$DIR" >&2
		exit 1
	}

	say ""
	say "${P}${B}  ♡ deepkut — installing your librarian ♡${O}"
	say ""
	say "  this script does exactly two things:"
	say "    1. downloads the agent into ${B}$DIR${O}"
	say "    2. runs its setup, which asks you a handful of questions"
	say ""
	note "  it never uses sudo and never touches anything outside that folder."
	say ""

	# install.sh is a question-and-answer wizard; piped into sh, stdin is this
	# script, so the child gets a real terminal — and if there isn't one, stop.
	if ! ( : < /dev/tty ) 2>/dev/null; then
		die "no terminal attached, and the setup needs to ask you some questions. run it from a terminal."
	fi

	if [ "$(id -u)" = "0" ]; then
		note "  heads up: you're root, so this installs into $DIR as root."
	fi

	if [ -e "$DIR" ]; then
		[ -d "$DIR" ] || die "$DIR exists and isn't a folder. move it, or set DEEPKUT_DIR to somewhere else."
		if [ ! -e "$DIR/install.sh" ] && [ -n "$(ls -A "$DIR" 2>/dev/null)" ]; then
			die "$DIR exists and isn't a deepkut install. move it, or set DEEPKUT_DIR to somewhere else."
		fi
		note "  updating the copy already in $DIR"
	fi

	say "  ${D}downloading…${O}"
	mkdir -p "$DIR" || die "couldn't create $DIR"
	curl -fsSL "$TARBALL" | tar -xz -C "$DIR" \
		|| die "the download didn't work — check your connection and paste the command again."

	say "  ${D}handing over to setup — the questions start now.${O}"
	say ""
	cd "$DIR"
	# the tty goes to the child on its own line, where it can't leak into us
	sh ./install.sh < /dev/tty
}

main