#!/usr/bin/env bash
# ===========================================================================
#  Stage 08: User Systemd Services
#  Deploys and enables Julian's custom user systemd services.
# ===========================================================================
#  On the Pop machine, Julian runs several custom services:
#    - porridge.service         : Zoom meeting transcriber daemon
#    - porridge-dictate.service : Push-to-talk transcription
#    - pi-overview.service      : Session dashboard on port 3000
#    - mempi-sync.service       : Sync memory DB to Nextcloud
#    - empty_downloads.service  : Clear Downloads folder at login
#
#  bw-ssh-keys.service uses ssh-agent.service (OpenSSH) to avoid
#  agent socket conflicts at login.
# ===========================================================================

CONFIG_DIR="${SCRIPT_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}/config"
SERVICES_DIR="${CONFIG_DIR}/systemd"
UNIT_DIR="$HOME/.config/systemd/user"

mkdir -p "$UNIT_DIR"

# ===========================================================================
#  0. SSH Agent setup — ensure OpenSSH ssh-agent is the active agent
# ===========================================================================
# Enable ssh-agent.socket and disable/mask the GCR SSH agent so that
# bw-ssh-keys.service (below) loads keys into the same agent the user's
# terminal sees. Must run BEFORE enabling bw-ssh-keys.service.
if [ "$DISTRO_FAMILY" = "fedora" ]; then
  info "Setting up OpenSSH ssh-agent..."

  systemctl --user enable --now ssh-agent.socket 2>/dev/null && \
    ok "ssh-agent.socket enabled." || \
    warn "ssh-agent.socket not available."

  if systemctl --user list-unit-files gcr-ssh-agent.service &>/dev/null 2>&1; then
    systemctl --user disable --now gcr-ssh-agent.socket gcr-ssh-agent.service 2>/dev/null || true
    systemctl --user mask --now gcr-ssh-agent.socket gcr-ssh-agent.service 2>/dev/null && \
      ok "gcr-ssh-agent disabled (masked)." || \
      warn "Could not mask gcr-ssh-agent."
  fi
fi

info "Deploying user systemd services..."

# ---- Helper: install service file ----
install_service_file() {
  local src="$1"
  local name="$2"
  if [ -f "$src" ]; then
    cp "$src" "$UNIT_DIR/$name"
    ok "Installed: $name"
  else
    warn "Service file not found: $src (skipping)"
  fi
}

# ---- 1. porridge.service — Zoom transcriber daemon ----
install_service_file "$SERVICES_DIR/porridge.service" "porridge.service"

# ---- 2. porridge-dictate.service — Push-to-talk transcription ----
install_service_file "$SERVICES_DIR/porridge-dictate.service" "porridge-dictate.service"

# ---- 3. pi-overview.service — Session dashboard ----
install_service_file "$SERVICES_DIR/pi-overview.service" "pi-overview.service"

# ---- 4. mempi-sync.service + timer — Sync memory DB to Nextcloud ----
install_service_file "$SERVICES_DIR/mempi-sync.service" "mempi-sync.service"

# ---- 5. empty_downloads.service — Clear Downloads at login ----
install_service_file "$SERVICES_DIR/empty_downloads.service" "empty_downloads.service"

# ---- Enable and start services ----
info "Enabling and starting services..."

# Services that should start automatically (enabled)
systemctl --user daemon-reload

if [ -x "$HOME/.local/bin/porridge" ]; then
  systemctl --user enable --now porridge.service 2>/dev/null && ok "porridge.service enabled"
else
  warn "porridge.service skipped (binary not found — run stage 06 first)."
fi

if [ -x "$HOME/.local/bin/porridge" ]; then
  systemctl --user enable --now porridge-dictate.service 2>/dev/null && ok "porridge-dictate.service enabled"
else
  warn "porridge-dictate.service skipped (binary not found — run stage 06 first)."
fi

if [ -x "$HOME/.local/bin/pi-overview" ]; then
  systemctl --user enable --now pi-overview.service 2>/dev/null && ok "pi-overview.service enabled"
else
  warn "pi-overview.service skipped (binary not found — run stage 07 first)."
fi

systemctl --user enable --now empty_downloads.service 2>/dev/null && ok "empty_downloads.service enabled" || warn "empty_downloads.service not started."


info "===== Service Status ====="
systemctl --user list-units --type=service --state=running 2>/dev/null | grep -E "(porridge|swayidle|pi-overview|mempi|empty)" || true

ok "Stage 08 complete: user systemd services deployed."