name = "network_info_parser"
category = "pipeline"
mode = "convert"
description = """
Parse network interface configuration from stdin (in "ip addr show" format)
and extract a summary of each interface.

For each interface block, output a line:
  IFACE: <name> IP: <ipv4_addr> MASK: /<prefix_len>

An interface block starts with a line like:
  2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 ...
and contains inet lines like:
  inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0

If an interface has no inet line, output:
  IFACE: <name> IP: none MASK: none

Skip the loopback interface (lo).
"""

bash_source = '''
#!/bin/bash

current_iface=""
found_ip=""
found_mask=""

flush_iface() {
  if [[ -n "$current_iface" && "$current_iface" != "lo" ]]; then
    if [[ -n "$found_ip" ]]; then
      echo "IFACE: $current_iface IP: $found_ip MASK: /$found_mask"
    else
      echo "IFACE: $current_iface IP: none MASK: none"
    fi
  fi
}

while IFS= read -r line || [[ -n "$line" ]]; do
  # Detect interface line: starts with a number followed by colon
  if echo "$line" | grep -qE '^[0-9]+:'; then
    flush_iface
    current_iface=$(echo "$line" | awk -F: '{print $2}' | sed 's/^[[:space:]]*//' | awk '{print $1}')
    found_ip=""
    found_mask=""
  fi

  # Detect inet line (IPv4 only, not inet6)
  if echo "$line" | grep -qE '^[[:space:]]+inet [0-9]'; then
    ip_cidr=$(echo "$line" | awk '{print $2}')
    found_ip=$(echo "$ip_cidr" | cut -d/ -f1)
    found_mask=$(echo "$ip_cidr" | cut -d/ -f2)
  fi
done

flush_iface
'''

[[test_cases]]
description = "Two interfaces with IPs"
stdin = """1: lo: <LOOPBACK,UP> mtu 65536
    inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500
    inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0
3: wlan0: <BROADCAST,MULTICAST,UP> mtu 1500
    inet 10.0.0.42/16 brd 10.0.255.255 scope global wlan0"""
expected_stdout = """IFACE: eth0 IP: 192.168.1.100 MASK: /24
IFACE: wlan0 IP: 10.0.0.42 MASK: /16"""

[[test_cases]]
description = "Interface with no IP"
stdin = """1: lo: <LOOPBACK,UP> mtu 65536
    inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0"""
expected_stdout = """IFACE: eth0 IP: none MASK: none
IFACE: docker0 IP: 172.17.0.1 MASK: /16"""

[[test_cases]]
description = "Single interface"
stdin = """1: lo: <LOOPBACK,UP> mtu 65536
    inet 127.0.0.1/8 scope host lo
2: enp3s0: <BROADCAST,MULTICAST,UP> mtu 9000
    inet 10.10.10.5/8 brd 10.255.255.255 scope global enp3s0"""
expected_stdout = "IFACE: enp3s0 IP: 10.10.10.5 MASK: /8"