#!/usr/bin/env bash
# Install generic landing-stats collector as user systemd timer.
#
# GOA / koopa (default):
#   cd ~/src/koopa/koopa-admin-log
#   ./scripts/taler-landing/install-landing-stats-host.sh
#
# Stage TESTPAYSAN (stagepaysan on francpaysan host):
#   STACK_PROFILE=stage-testpaysan ./scripts/taler-landing/install-landing-stats-host.sh
#   # or from francpaysan-admin-log: ./scripts/stagepaysan/install-landing-stats.sh
#
# Optional: STACK_ENV_FILE=/path/to/profile.env
# Requires linger: sudo loginctl enable-linger $USER
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
ADMIN_LOG="${ADMIN_LOG:-$ROOT}"
SRC="$ADMIN_LOG/scripts/taler-landing"
UNIT_SRC="$ADMIN_LOG/configs/systemd/user"
PROFILE="${STACK_PROFILE:-goa}"

BIN_DST="${HOME}/.local/bin"
LIB_DST="${HOME}/.local/lib/taler-landing"
UNIT_DST="${HOME}/.config/systemd/user"
STATE_DST="${HOME}/.local/state/taler-landing-stats"
CFG_DST="${HOME}/.config/taler-landing"

mkdir -p "$BIN_DST" "$LIB_DST" "$UNIT_DST" "$STATE_DST" "$CFG_DST"

install -m 0755 "$SRC/collect-landing-stats.sh" "$BIN_DST/collect-landing-stats.sh"
install -m 0755 "$SRC/collect_bank_stats.py" "$LIB_DST/collect_bank_stats.py"
install -m 0755 "$SRC/enrich_stats_alt.py" "$LIB_DST/enrich_stats_alt.py"
install -m 0755 "$SRC/merge_resources.py" "$LIB_DST/merge_resources.py"
install -m 0755 "$SRC/collect_container_resources.sh" "$LIB_DST/collect_container_resources.sh"
if [ -f "$SRC/test-landing-stats.sh" ]; then
  install -m 0755 "$SRC/test-landing-stats.sh" "$BIN_DST/test-landing-stats.sh" 2>/dev/null || \
    install -m 0755 "$SRC/test-landing-stats.sh" "$LIB_DST/test-landing-stats.sh"
fi
install -m 0644 "$SRC/goa_amounts.py" "$LIB_DST/goa_amounts.py"
# mem-snapshot helper lives in taler-shared (copied into containers at collect time)
if [ -f "$ADMIN_LOG/scripts/taler-shared/mem-snapshot.sh" ]; then
  install -m 0644 "$ADMIN_LOG/scripts/taler-shared/mem-snapshot.sh" \
    "$LIB_DST/mem-snapshot.sh"
fi

# Stack profile → ~/.config/taler-landing/stack.env (sourced by collector)
if [ -n "${STACK_ENV_FILE:-}" ] && [ -f "${STACK_ENV_FILE}" ]; then
  install -m 0644 "${STACK_ENV_FILE}" "$CFG_DST/stack.env"
elif [ -f "$SRC/profiles/${PROFILE}.env" ]; then
  install -m 0644 "$SRC/profiles/${PROFILE}.env" "$CFG_DST/stack.env"
else
  echo "WARN: no profile ${PROFILE}.env — collector uses built-in GOA defaults" >&2
fi

install -m 0644 "$UNIT_SRC/taler-landing-stats.service" "$UNIT_DST/"
install -m 0644 "$UNIT_SRC/taler-landing-stats.timer" "$UNIT_DST/"

# Point unit EnvironmentFile at stack profile
if grep -q '^EnvironmentFile=' "$UNIT_DST/taler-landing-stats.service" 2>/dev/null; then
  :
else
  # inject after [Service]
  sed -i '/^\[Service\]/a EnvironmentFile=-%h/.config/taler-landing/stack.env' \
    "$UNIT_DST/taler-landing-stats.service"
fi

systemctl --user daemon-reload
systemctl --user enable --now taler-landing-stats.timer

echo "Installed (user=$(id -un) profile=${PROFILE}):"
echo "  $BIN_DST/collect-landing-stats.sh"
echo "  $LIB_DST/{collect_bank_stats,enrich_stats_alt,goa_amounts}.py"
echo "  $CFG_DST/stack.env"
echo "  $UNIT_DST/taler-landing-stats.{service,timer} (timer enabled)"
echo "  logs: $STATE_DST/"
echo
if ! loginctl show-user "$(id -un)" -p Linger 2>/dev/null | grep -q 'Linger=yes'; then
  echo "NOTE: enable linger so the timer survives logout:"
  echo "  sudo loginctl enable-linger $(id -un)"
  echo
fi
echo "Run once now:"
echo "  systemctl --user start taler-landing-stats.service"
echo "  journalctl --user -u taler-landing-stats.service -n 40 --no-pager"
echo
echo "Secrets (if not via podman exec bank):"
echo "  mkdir -p ~/.config/taler-landing && chmod 700 ~/.config/taler-landing"
echo "  # bank-admin-password.txt  bank-explorer-password.txt"