#!/usr/bin/env bash
# Called explicitly by install.sh. Also usable once on existing installations.
set -euo pipefail
cd "$(dirname "$0")"
DEPLOY="$(pwd -P)"
DATA="${PIPU_DATA:-$(sed -n 's/^PIPU_DATA=//p' .env)}"
DATA="${DATA:-/srv/pipu}"
command -v python3 >/dev/null || { echo 'Install python3 (>=3.10) first' >&2; exit 1; }
python3 -c 'import sys; assert sys.version_info >= (3, 10), "Python >=3.10 required"'
[ -d /etc/systemd/system ] || { echo 'systemd is required for server management' >&2; exit 1; }
mkdir -p "$DATA/management" /var/lib/pipu-management /usr/local/lib/pipu
chown 65532:65532 "$DATA/management"
chmod 700 "$DATA/management" /var/lib/pipu-management
# Copy outside the checkout: switching revisions must not replace a running worker.
install -m 700 server-agent.py /usr/local/lib/pipu/server-agent.py
touch config.local
chmod 600 config.local
if [ -n "${SUDO_USER:-}" ]; then chown "$SUDO_USER" config.local; fi
# systemd quoted arguments escape backslashes, quotes and specifiers.
quote_unit() { printf '%s' "$1" | sed 's/\\/\\\\/g; s/"/\\"/g; s/%/%%/g'; }
DEPLOY_UNIT="$(quote_unit "$DEPLOY")"
MAILBOX_UNIT="$(quote_unit "$DATA/management")"
cat > /etc/systemd/system/pipu-management.service <<EOF
[Unit]
Description=Pipu Music server management agent
After=docker.service
Requires=docker.service

[Service]
Type=simple
ExecStart=/usr/bin/python3 /usr/local/lib/pipu/server-agent.py --deploy-dir "$DEPLOY_UNIT" --mailbox "$MAILBOX_UNIT" --state-dir /var/lib/pipu-management
Restart=on-failure
RestartSec=3
UMask=0077
KillMode=control-group

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable pipu-management.service
systemctl restart pipu-management.service
echo '→ управление сервером: pipu-management.service'