"""Agent slots for due planned reviews."""

from __future__ import annotations

from datetime import datetime, timezone
from typing import Any

from steering.eval_context import SteeringEvalContext


def _parse_due(value: Any) -> datetime | None:
    if not value:
        return None
    if isinstance(value, datetime):
        return value if value.tzinfo else value.replace(tzinfo=timezone.utc)
    try:
        text = str(value).replace("Z", "+00:00")
        parsed = datetime.fromisoformat(text)
        return parsed if parsed.tzinfo else parsed.replace(tzinfo=timezone.utc)
    except ValueError:
        return None


def resolve_review_due_slots(ctx: SteeringEvalContext) -> list[dict[str, Any]]:
    now = datetime.now(timezone.utc)
    slots: list[dict[str, Any]] = []

    for review in ctx.reviews:
        if review.get("status") != "planned":
            continue
        due = _parse_due(review.get("due_at"))
        if due is None or due > now:
            continue
        slots.append(
            {
                "slot_key": "review.due",
                "scope_type": "review",
                "scope_id": str(review["id"]),
                "title": review.get("title") or "Review",
                "summary": "Geplantes Review ist fällig",
                "actor_role_hint": "reviewer",
                "payload_keys": ["review_id", "checklist_id"],
                "priority": "high" if due < now else "normal",
                "review_id": str(review["id"]),
                "action_id": (
                    str(review["action_id"]) if review.get("action_id") else None
                ),
                "milestone_id": (
                    str(review["milestone_id"]) if review.get("milestone_id") else None
                ),
            }
        )

    return slots