#!/usr/bin/env bash
# Deploy net_alerter daemon to target host
# Usage: ./deploy-daemon.sh [user@host] [remote-dir]

set -euo pipefail

TARGET_HOST="${1:-root@10.0.0.0}"
REMOTE_DIR="${2:-/opt/net_alerter}"
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SCRIPT="$SCRIPT_DIR/net_alerter.py"
SERVICE="$SCRIPT_DIR/net_alerter.service"

if [[ ! -f "$SCRIPT" ]]; then
    echo "[error] net_alerter.py not found at $SCRIPT"
    exit 1
fi

if [[ ! -f "$SERVICE" ]]; then
    echo "[error] net_alerter.service not found at $SERVICE"
    exit 1
fi

echo "[*] Deploying to $TARGET_HOST..."

# Create directory
ssh "$TARGET_HOST" "mkdir -p $REMOTE_DIR && ls -la $REMOTE_DIR"

# Copy daemon script
echo "[*] Copying daemon script..."
scp "$SCRIPT" "$TARGET_HOST:$REMOTE_DIR/net_alerter.py"

# Copy OUI database
echo "[*] Copying OUI database..."
scp "$SCRIPT_DIR/../data/oui.db" "$TARGET_HOST:$REMOTE_DIR/oui.db"

# Copy systemd unit
echo "[*] Copying systemd unit..."
scp "$SERVICE" "$TARGET_HOST:/etc/systemd/system/net_alerter.service"

# If .env doesn't exist, create a template
echo "[*] Checking for .env..."
ssh "$TARGET_HOST" "
if [[ ! -f $REMOTE_DIR/.env ]]; then
    cat > $REMOTE_DIR/.env <<'EOF'
MATRIX_HOMESERVER=https://m.example.org
MATRIX_ACCESS_TOKEN=
MATRIX_ROOM_ID=
EOF
    chmod 600 $REMOTE_DIR/.env
    echo '[warn] Created .env template - update MATRIX_ACCESS_TOKEN and MATRIX_ROOM_ID'
else
    echo '[ok] .env exists'
fi
"

# Remove old cron if present
echo "[*] Removing old cron entries..."
ssh "$TARGET_HOST" "crontab -l 2>/dev/null | grep -v net_alerter | crontab - 2>/dev/null || true"

# Enable and start service
echo "[*] Enabling and starting service..."
ssh "$TARGET_HOST" "
systemctl daemon-reload
systemctl enable net_alerter
systemctl restart net_alerter
sleep 3
systemctl status net_alerter --no-pager
"

# Verify OUI database
echo "[*] Verifying OUI database on remote host..."
ssh "$TARGET_HOST" "python3 -c \"import sqlite3; c=sqlite3.connect('/opt/net_alerter/oui.db'); print('OUI rows:', c.execute('SELECT COUNT(*) FROM oui').fetchone()[0])\""

echo "[*] Checking logs..."
ssh "$TARGET_HOST" "journalctl -u net_alerter -n 20 --no-pager"

echo "[done] net_alerter daemon deployed and running"