"""Read-only release reconciliation and durable follow-up intent."""
from __future__ import annotations

from dataclasses import dataclass
from typing import Any, Mapping


@dataclass(frozen=True)
class ReconciliationReport:
    healthy: bool
    drift: tuple[str, ...]
    actions: tuple[str, ...]


class ReconciliationController:
    CHECKS = (
        ("authority_main", "gitea_main", "main_drift"),
        ("local_tag_oid", "remote_tag_oid", "tag_drift"),
        ("remote_peeled_target", "approved_target_oid", "peeled_target_drift"),
        ("registry_version", "baseline_version", "registry_baseline_drift"),
        ("approved_artifact_digest", "deployed_artifact_digest", "artifact_drift"),
        ("declared_production_state", "service_healthy", "service_health_drift"),
    )

    def reconcile(self, actual: Mapping[str, Any]) -> ReconciliationReport:
        drift: list[str] = []
        for left, right, label in self.CHECKS:
            if actual.get(left) != actual.get(right):
                drift.append(label)
        actions = () if not drift else ("open_reconciliation_task", "open_reconciliation_pr", "attach_evidence", "notify_owner")
        return ReconciliationReport(not drift, tuple(drift), actions)