"""日历/存续/停牌/来源错误分流后，只修复有证据的数据缺口。"""
import json

dates = ["2026-10-16", "2026-10-19", "2026-10-20", "2026-10-21", "2026-10-22", "2026-10-23", "2026-10-24", "2026-10-25", "2026-10-26"]
market_sessions = set(dates)-{"2026-10-24", "2026-10-25"}
listed_from, listed_until = "2026-10-19", "2026-10-23"
stored = {"2026-10-19": {"close": 10, "source": "initial-1"}, "2026-10-23": {"close": 13, "source": "initial-2"}}
status = {"2026-10-20": "verified_suspended", "2026-10-21": "verified_active"}
failed_requests = {"2026-10-21"}
diagnosis = {}
for day in dates:
    if day not in market_sessions:
        state = "market_closed"
    elif day < listed_from:
        state = "before_listing"
    elif day > listed_until:
        state = "after_listing"
    elif day in stored:
        state = "observed"
    elif status.get(day) == "verified_suspended":
        state = "suspended"
    elif status.get(day) == "verified_active" and day in failed_requests:
        state = "download_gap"
    else:
        state = "unknown_reason"
    diagnosis[day] = state
retry = [d for d, state in diagnosis.items() if state == "download_gap"]
repaired = {**stored}
for day in retry:
    repaired[day] = {"close": 11, "source": "synthetic-retry-1"}
assert retry == ["2026-10-21"]
assert diagnosis["2026-10-20"] == "suspended" and diagnosis["2026-10-22"] == "unknown_reason"
assert diagnosis["2026-10-16"] == "before_listing" and diagnosis["2026-10-26"] == "after_listing"
assert len(repaired) == 3 and set(repaired) == {"2026-10-19", "2026-10-21", "2026-10-23"}
assert all(d not in repaired for d in ["2026-10-20", "2026-10-22", "2026-10-24", "2026-10-25"])
assert repaired["2026-10-21"]["source"] == "synthetic-retry-1"
assert stored.keys() == {"2026-10-19", "2026-10-23"}
print(json.dumps({"diagnosis": diagnosis, "retry": retry, "repaired": repaired,
                  "still_unknown": [d for d, s in diagnosis.items() if s == "unknown_reason"]}, sort_keys=True))