#!/bin/bash
# chezmoi is how dotup ARRIVES, so "it must already be here" is the natural
# assumption -- and it is wrong often enough to have broken a real install.
#
# get.chezmoi.io installs to ./bin RELATIVE TO THE CWD when -b is not given,
# which is exactly what the README's one-liner does. Run it from $HOME and the
# binary lands in ~/bin; run it from /workspace, as anyone in a container does,
# and it lands in /workspace/bin. Neither is on PATH, and the private tier then
# failed with `chezmoi: not found` AFTER writing the bws token -- half
# configured, at the very last step, having already spent the password.
#
# So this scenario puts the machine in exactly that state -- chezmoi nowhere
# find_tool looks -- and asks two questions:
#
#   does dotup install one, before asking for anything?
#   and if it CANNOT, does it say so before the password rather than after?
#
# It cannot be a unit test on a developer box: find_tool probes
# /home/linuxbrew/.linuxbrew/bin by absolute path, and any box with linuxbrew
# satisfies the lookup no matter what PATH says. A container has no such
# directory, so absence here is real.
set -u
fail() { echo "FAIL: $*"; exit 1; }
ok()   { echo "  ok  $*"; }

# ---- public tier first, unaided, exactly as the README says ------------------
sh -c "$(curl -fsLS get.chezmoi.io)" -- init --apply "$PUB_URL" >/tmp/init.log 2>&1 \
	|| { tail -20 /tmp/init.log; fail "public tier init"; }
D=$HOME/.local/bin/dotup
[ -x "$D" ] || fail "no dotup after the public apply"
ok "public tier applied"

# ---- now take chezmoi away, everywhere find_tool looks ----------------------
for c in "$HOME/.local/bin/chezmoi" "$HOME/bin/chezmoi" "$HOME/.npm-global/bin/chezmoi" \
         /usr/local/bin/chezmoi /usr/local/go/bin/chezmoi \
         /home/linuxbrew/.linuxbrew/bin/chezmoi /opt/homebrew/bin/chezmoi; do
	[ -e "$c" ] && { sudo rm -f "$c" || rm -f "$c"; }
done
command -v chezmoi >/dev/null 2>&1 && fail "chezmoi is still on PATH; the state under test never happened"
for c in "$HOME/.local/bin/chezmoi" "$HOME/bin/chezmoi" "$HOME/.npm-global/bin/chezmoi" \
         /usr/local/bin/chezmoi /usr/local/go/bin/chezmoi \
         /home/linuxbrew/.linuxbrew/bin/chezmoi /opt/homebrew/bin/chezmoi; do
	[ -e "$c" ] && fail "chezmoi is still at $c -- find_tool would find it"
done
ok "chezmoi is absent from every place find_tool looks"

# ---- tick the row that needs it, and answer q at the first prompt ------------
# `q` is enough: ensure_chezmoi runs BEFORE the prompt on purpose, so whatever
# it did has already happened by the time the first question is asked.
S=${XDG_CONFIG_HOME:-$HOME/.config}/dotfiles
mkdir -p "$S"; printf 'private/private-repo\n' > "$S/selected"
printf 'q\n' | timeout 180 script -q -c "$D private" /dev/null >/tmp/priv.log 2>&1
rc=$?
out=$(tr -d '\r' </tmp/priv.log | sed 's/\x1b\[[0-9;]*m//g')
printf '%s\n' "$out" | sed 's/^/   | /'

# ---- what must be true ------------------------------------------------------
case $out in
*"chezmoi is not on PATH or in the usual places"*) ok "it noticed chezmoi was missing" ;;
*) fail "dotup never noticed chezmoi was missing (rc=$rc)" ;;
esac

case $out in
*"the chezmoi installer failed"*|*"chezmoi still not found"*)
	fail "the installer call did not install anything -- the private repo
       cannot be cloned, and this is the failure that used to happen AFTER
       the password had already been typed and the bws token written" ;;
esac
case $out in
*"the private repo cannot be cloned without chezmoi"*)
	fail "dotup gave up on the private repo instead of installing chezmoi" ;;
esac
case $out in
*"chezmoi installed to ~/.local/bin"*) ok "it installed one, and said where" ;;
*) fail "no chezmoi was installed" ;;
esac
[ -x "$HOME/.local/bin/chezmoi" ] || fail "nothing executable at ~/.local/bin/chezmoi"
"$HOME/.local/bin/chezmoi" --version >/dev/null 2>&1 || fail "the installed chezmoi does not run"
ok "the installed chezmoi is a working binary"

# The ordering that makes the failure survivable: chezmoi is resolved BEFORE
# anything is asked for. If it can only be discovered missing afterwards, the
# password has been spent and the token is already on disk.
a=$(printf '%s\n' "$out" | grep -n 'installing it'  | head -1 | cut -d: -f1)
b=$(printf '%s\n' "$out" | grep -n 'Bootstrap URL'  | head -1 | cut -d: -f1)
[ -n "$a" ] && [ -n "$b" ] && [ "$a" -lt "$b" ] \
	|| fail "chezmoi was not resolved before the first prompt (installing=$a prompt=$b)"
ok "chezmoi was resolved before the first question was asked"

case $out in
*"public-only machine"*) ok "q at the prompt left a public-only machine" ;;
*) fail "q was not accepted at the URL prompt" ;;
esac
echo "CHEZMOI-ABSENT PASS"