#!/usr/bin/env python3
"""Use global context for nvlInState/nvlClearSeq (shared across Node-RED tabs)."""
import json
import shutil
from datetime import datetime

path = "/srv/docker-volumes/config/nodered/data/flows.json"
backup = path + ".bak-global-nvl-" + datetime.now().strftime("%Y%m%d-%H%M%S")
shutil.copy2(path, backup)
print("backup:", backup)

with open(path) as f:
    flows = json.load(f)

replacements = [
    ("flow.get('nvlInState')", "global.get('nvlInState')"),
    ('flow.get("nvlInState")', 'global.get("nvlInState")'),
    ("flow.set('nvlInState'", "global.set('nvlInState'"),
    ('flow.set("nvlInState"', 'global.set("nvlInState"'),
    ("flow.get('nvlClearSeq')", "global.get('nvlClearSeq')"),
    ("flow.set('nvlClearSeq'", "global.set('nvlClearSeq'"),
]

count = 0
for n in flows:
    fn = n.get("func")
    if not fn:
        continue
    original = fn
    for old, new in replacements:
        fn = fn.replace(old, new)
    if fn != original:
        n["func"] = fn
        count += 1
        print("patched", n.get("id"), n.get("name"))

with open(path, "w") as f:
    json.dump(flows, f)

print("patched nodes:", count, "done")