"""合成供应商响应与补拉；不发网络请求。"""
import json

sessions = ["2026-10-19", "2026-10-20", "2026-10-21"]
responses = {"AAA": sessions[:], "BBB": sessions[1:], "CCC": None}
store, retry, coverage = {}, {}, {}
for symbol, response in responses.items():
    store[symbol] = set(response or [])
    missing = sorted(set(sessions) - store[symbol])
    coverage[symbol] = {"status": "failed" if response is None else "partial" if missing else "success",
                        "rows": len(store[symbol]), "missing": missing}
    if missing:
        retry[symbol] = missing
assert coverage["AAA"]["status"] == "success"
assert coverage["BBB"]["status"] == "partial"
assert coverage["CCC"]["status"] == "failed"
for symbol, dates in retry.items():
    store[symbol].update(dates)
    store[symbol].update(dates)
assert all(len(dates) == 3 for dates in store.values())
assert len(retry) == 2
print(json.dumps({"initial": coverage, "retry": retry,
                  "after_rows": {s: len(v) for s, v in store.items()}}, sort_keys=True))