#!/bin/sh
# Netifyd Flow Data Collector
# Reads from netifyd Unix socket and maintains a local flow cache

NETIFYD_SOCKET="/var/run/netifyd/netifyd.sock"
FLOW_CACHE="/tmp/netifyd-flows.json"
MAX_FLOWS=1000

# Check if netifyd is running
if ! pidof netifyd >/dev/null 2>&1; then
    echo "[]" > "$FLOW_CACHE"
    exit 1
fi

# Check if socket exists
if [ ! -S "$NETIFYD_SOCKET" ]; then
    echo "[]" > "$FLOW_CACHE"
    exit 1
fi

# Read from Unix socket and collect flow data
# Note: netifyd socket outputs status info, not real-time flows
# We need to use netifyd CLI to get flow information

# Try to get flow data from netifyd status
if [ -f "/var/run/netifyd/status.json" ]; then
    # Extract flows if available, otherwise create empty array
    if command -v jq >/dev/null 2>&1; then
        jq -c 'if .flows then .flows else [] end' /var/run/netifyd/status.json > "$FLOW_CACHE" 2>/dev/null || echo "[]" > "$FLOW_CACHE"
    else
        cp /var/run/netifyd/status.json "$FLOW_CACHE"
    fi
else
    echo "[]" > "$FLOW_CACHE"
fi

# Keep only the most recent flows
if [ -f "$FLOW_CACHE" ] && command -v jq >/dev/null 2>&1; then
    jq "if length > $MAX_FLOWS then .[-$MAX_FLOWS:] else . end" "$FLOW_CACHE" > "$FLOW_CACHE.tmp" 2>/dev/null && mv "$FLOW_CACHE.tmp" "$FLOW_CACHE"
fi

exit 0