#!/usr/bin/env bash
# install-host-agent.sh — install hernani user systemd units on koopa
#
#   # on koopa as hernani:
#   ~/src/taler-monitoring/host-agent/install-host-agent.sh
#   # or from laptop:
#   ./install-host-agent.sh --remote koopa-external
#
set -euo pipefail
ROOT=$(cd "$(dirname "$0")" && pwd)
REMOTE="${1:-}"
[ "${1:-}" = "--remote" ] && REMOTE="${2:-koopa-external}"

install_local() {
  local mon home_unit
  mon=$(cd "$ROOT/.." && pwd)
  # Prefer ~/koopa-admin-log on live host
  if [ -d "$HOME/src/taler-monitoring" ]; then
    mon="$HOME/src/taler-monitoring"
  fi
  home_unit="$HOME/.config/systemd/user"
  mkdir -p "$home_unit" \
    "$HOME/.local/state/taler-hacktivism-monitoring" \
    "$HOME/monitoring-sites-staging" \
    "$HOME/.config/taler-monitoring" \
    "$HOME/src"

  # Local env (never in git) — create from example if missing
  if [ ! -f "$HOME/.config/taler-monitoring/env" ] && [ -f "$ROOT/env.example" ]; then
    cp "$ROOT/env.example" "$HOME/.config/taler-monitoring/env"
    echo "created ~/.config/taler-monitoring/env"
  fi

  # Prefer a real git clone for update-suite.sh
  if [ ! -d "$HOME/src/koopa-admin-log/.git" ] && [ ! -d "$HOME/koopa-admin-log/.git" ]; then
    if [ -d "$HOME/src/taler-monitoring" ] && [ ! -d "$HOME/koopa-admin-log/.git" ]; then
      echo "note: $HOME/koopa-admin-log has no .git — update-suite will clone to ~/src/koopa-admin-log"
    fi
    git clone https://git.hacktivism.ch/hernani/taler-monitoring.git "$HOME/src/koopa-admin-log" 2>/dev/null \
      || echo "WARN: clone failed (auth/network) — will use existing tree if any"
  fi

  # Ensure suite is executable
  chmod +x "$mon"/taler-monitoring.sh "$mon"/check_*.sh 2>/dev/null || true
  chmod +x "$mon/host-agent"/*.sh 2>/dev/null || true
  chmod +x "$mon/site-gen"/*.sh "$mon/site-gen/console_to_html.py" 2>/dev/null || true

  # Units reference %h/koopa-admin-log — prefer git clone or symlink
  if [ -d "$HOME/src/koopa-admin-log/.git" ] && [ ! -e "$HOME/koopa-admin-log" ]; then
    ln -sfn "$HOME/src/koopa-admin-log" "$HOME/koopa-admin-log"
    echo "symlink $HOME/koopa-admin-log → $HOME/src/koopa-admin-log"
  elif [ ! -e "$HOME/koopa-admin-log" ]; then
    admin_root=$(cd "$mon/../.." && pwd)
    ln -sfn "$admin_root" "$HOME/koopa-admin-log"
    echo "symlink $HOME/koopa-admin-log → $admin_root"
  fi

  install -m 644 "$ROOT/taler-monitoring-hacktivism.service" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-hacktivism.path" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-hacktivism.timer" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-surface.service" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-surface.timer" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-aptdeploy.service" "$home_unit/"
  install -m 644 "$ROOT/taler-monitoring-aptdeploy.timer" "$home_unit/"

  # Fix ExecStart if install path differs (units use %h/koopa-admin-log)
  systemctl --user daemon-reload
  systemctl --user enable --now taler-monitoring-hacktivism.path
  systemctl --user enable --now taler-monitoring-hacktivism.timer
  systemctl --user enable --now taler-monitoring-surface.timer
  systemctl --user enable --now taler-monitoring-aptdeploy.timer
  # initial stamp so path exists
  "$ROOT/touch-software-stamp.sh"
  systemctl --user start taler-monitoring-hacktivism.service || true
  systemctl --user start taler-monitoring-surface.service || true
  systemctl --user start taler-monitoring-aptdeploy.service || true

  echo "--- status ---"
  systemctl --user status taler-monitoring-hacktivism.path --no-pager -l | head -15
  systemctl --user status taler-monitoring-hacktivism.timer --no-pager -l | head -12
  systemctl --user status taler-monitoring-surface.timer --no-pager -l | head -12
  systemctl --user status taler-monitoring-aptdeploy.timer --no-pager -l | head -12
  systemctl --user list-timers --all | grep taler-monitoring || true
  echo "OK host-agent (hacktivism 4h + surface 1h + aptdeploy 4h)"
  echo "manual: systemctl --user start taler-monitoring-hacktivism.service"
  echo "manual surface: systemctl --user start taler-monitoring-surface.service"
  echo "manual aptdeploy: systemctl --user start taler-monitoring-aptdeploy.service"
  echo "after upgrades: $ROOT/touch-software-stamp.sh"
}

if [ -n "$REMOTE" ] && [ "$REMOTE" != "--remote" ]; then
  echo "install on $REMOTE …"
  rsync -az --delete \
    --exclude secrets.env \
    --exclude 'android-test/artifacts' \
    "$ROOT/../../" \
    "${REMOTE}:src/taler-monitoring/"
  # ensure full tree for %h/koopa-admin-log if missing configs etc.
  ssh -o BatchMode=yes -o ConnectTimeout=20 "$REMOTE" \
    'test -d $HOME/koopa-admin-log || git clone https://git.hacktivism.ch/hernani/taler-monitoring.git $HOME/koopa-admin-log 2>/dev/null || true'
  rsync -az "$ROOT/" "${REMOTE}:src/taler-monitoring/host-agent/"
  rsync -az "$ROOT/../site-gen/" "${REMOTE}:src/taler-monitoring/site-gen/" 2>/dev/null || true
  ssh -o BatchMode=yes "$REMOTE" \
    'bash $HOME/src/taler-monitoring/host-agent/install-host-agent.sh'
else
  install_local
fi