"""Read-only operator migration records for pre-ledger task branches."""
from __future__ import annotations

import json
from typing import Any, Callable

from gitea_api_policy import PolicyError
from scm_task_grants import ADOPTIONS_PATH, TaskLedger


def seed(ledger: TaskLedger, token: str, branch_head: Callable[[str, str, str], str | None]) -> None:
    """Seed each independently reviewed record without blocking unrelated SCM."""
    try:
        records = json.loads(ADOPTIONS_PATH.read_bytes())
    except (OSError, TypeError, ValueError):
        print("SCM task adoption registry is unavailable; deferring migration", flush=True)
        return
    if not isinstance(records, dict) or len(records) > 64:
        print("SCM task adoption registry is invalid; deferring migration", flush=True)
        return
    for key, record in records.items():
        try:
            if not isinstance(key, str) or not isinstance(record, dict):
                raise PolicyError("task branch adoption registry is invalid")
            repo, ref = record.get("repo"), record.get("ref")
            if key != f"{repo}/{ref}":
                raise PolicyError("task branch adoption registry is invalid")
            ledger.seed_adoption(record, branch_head(repo, ref, token))
        except (OSError, PolicyError, TypeError, ValueError):
            print(f"SCM task adoption deferred for {key!r}", flush=True)