from __future__ import annotations

from fastapi import APIRouter, Body, Request, Depends
from typing import Any

from app.api.v1.endpoints.platform import ok, fail
from app.db.platform_store import get_platform_store
from app.core.auth import require_admin

router = APIRouter(prefix="/retention-policies", tags=["retention"])


def _actor(request: Request) -> str | None:
    auth = request.headers.get("Authorization", "")
    token = auth.replace("Bearer ", "").strip()
    return token or None


@router.get("")
def list_policies(current_user: dict = Depends(require_admin)) -> dict[str, Any]:
    return ok(get_platform_store().retention_policies())


@router.post("")
def create_policy(payload: dict[str, Any] = Body(...), request: Request = None, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
    if not payload.get("name"):
        raise fail(400, "name 必填")
    policy = get_platform_store().create_retention_policy(payload)
    get_platform_store().record_audit(
        action="retention.create",
        actor_id=current_user.get("id"),
        target_type="retention_policy",
        target_id=policy["id"],
        detail=f"name={policy.get('name')}",
    )
    return ok(policy)


@router.get("/{policy_id}")
def get_policy(policy_id: str, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
    try:
        return ok(get_platform_store().retention_policy(policy_id))
    except KeyError:
        raise fail(404, "retention policy not found")


@router.put("/{policy_id}")
def update_policy(
    policy_id: str, payload: dict[str, Any] = Body(...), request: Request = None,
    current_user: dict = Depends(require_admin),
) -> dict[str, Any]:
    store = get_platform_store()
    try:
        policy = store.update_retention_policy(policy_id, payload)
    except KeyError:
        raise fail(404, "retention policy not found")
    store.record_audit(
        action="retention.update",
        actor_id=current_user.get("id"),
        target_type="retention_policy",
        target_id=policy_id,
        detail=f"fields={','.join(payload.keys())}",
    )
    return ok(policy)


@router.delete("/{policy_id}")
def delete_policy(policy_id: str, request: Request = None, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
    store = get_platform_store()
    store.delete_retention_policy(policy_id)
    store.record_audit(
        action="retention.delete",
        actor_id=current_user.get("id"),
        target_type="retention_policy",
        target_id=policy_id,
    )
    return ok({"deleted": policy_id})