#!/usr/bin/env python3
"""Konvertiert ap1-leases-export.json in RouterOS-Befehle für crs326-core.

Nur dynamic=false-Leases werden übernommen, mit server-Namen 1:1 übernommen
(dhcp-v10..dhcp-v99), disabled=yes, damit sie im Cutover zusammen mit den
DHCP-Servern enabled werden.

Ausgabe: routeros/ap1-leases-to-core.rsc
"""
import json
import pathlib
import shlex

LEASES = pathlib.Path(__file__).with_name("ap1-leases-export.json")
OUT = pathlib.Path(__file__).with_name("ap1-leases-to-core.rsc")


def escape(s):
    # RouterOS comment darf Leerzeichen enthalten; wir quotieren mit doppelten Anführungszeichen
    return s.replace('\\', '\\\\').replace('"', '\\"')


def main():
    leases = json.loads(LEASES.read_text())
    static = [l for l in leases if str(l.get("dynamic")).lower() == "false"]
    lines = [
        "# ap1 static leases -> crs326-core (STAGED, disabled=yes)",
        f"# Quelle: {LEASES.name} | {len(static)} statische Leases",
        "",
    ]
    for l in sorted(static, key=lambda x: (x.get("server", ""), x.get("address", ""))):
        server = l.get("server", "")
        if not server.startswith("dhcp-v"):
            lines.append(f"# SKIP unbekannter server '{server}': {l.get('address')} {l.get('mac-address')}")
            continue
        mac = l.get("mac-address", "")
        addr = l.get("address", "")
        client_id = l.get("client-id", "")
        hostname = l.get("host-name", "")
        dhcp_option = l.get("dhcp-option", "")
        comment_parts = [hostname, l.get("comment", "")]
        comment = " / ".join(p for p in comment_parts if p).strip()
        if not comment:
            comment = f"lease {addr}"
        cmd = f'/ip/dhcp-server/lease add server={server} mac-address="{mac}" address="{addr}"'
        if client_id:
            cmd += f' client-id="{client_id}"'
        if dhcp_option:
            cmd += f' dhcp-option={shlex.quote(dhcp_option)}'
        cmd += f' comment="{escape(comment)}" disabled=yes'
        lines.append(cmd)
    lines.append("")
    lines.append("# Cutover: /ip/dhcp-server/lease/enable [find comment~\"ap1 lease\"]")
    OUT.write_text("\n".join(lines) + "\n")
    print(f"{OUT} written with {len(static)} static lease commands")


if __name__ == "__main__":
    main()