"""Owner transfer routes — admin-only bulk ownership transfer."""

from __future__ import annotations

import uuid
from typing import Any

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.db import get_db
from app.deps import require_admin
from app.services.owner_transfer_service import transfer_ownership

router = APIRouter(prefix="/api/v1/ownership", tags=["ownership"])


class TransferRequest(BaseModel):
    from_user_id: str
    to_user_id: str
    entity_types: list[str] | None = None


@router.post("/transfer")
async def transfer_ownership_endpoint(
    body: TransferRequest,
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(require_admin),
):
    """Bulk-transfer all records from one user to another.

    Admin-only endpoint. If entity_types is None, all known entity types
    are transferred.
    """
    try:
        from_uid = uuid.UUID(body.from_user_id)
        to_uid = uuid.UUID(body.to_user_id)
    except ValueError:
        raise HTTPException(
            400,
            detail={"detail": "Invalid user_id format", "code": "invalid_id"},
        ) from None

    tenant_id = uuid.UUID(current_user["tenant_id"])

    results = await transfer_ownership(
        db,
        tenant_id,
        from_uid,
        to_uid,
        body.entity_types,
    )

    return {
        "message": "Ownership transfer completed",
        "results": results,
    }