from typing import Any

from src.connectors.exceptions import OwsPayeeException
from src.error_handlers.common import get_error_details
from src.models import NewTaxDetails


def flatten_fields(
    field_error_map: dict[str, Any],
    values: object,
    fields: list[str],
    data: dict[str, Any],
) -> None:
    """Hierarchical fields map to list."""
    for key, error in field_error_map.items():
        value = getattr(values, key, None) if values else None
        if isinstance(error, dict):
            flatten_fields(error, value, fields, data)
        else:
            if isinstance(error, list):
                error = ', '.join(error)
            fields.append(f'{key}: {error}')
            data[key] = value


def handle_save_error(
    account_payee_id: int, payload: NewTaxDetails, exception: Exception
) -> None:
    status_code, error_data = get_error_details(exception)
    error_code = str(exception)
    additional_data = dict(account_payee_id=account_payee_id)
    if error_data and status_code == 400:
        data_message = error_data.get('message')
        if isinstance(data_message, str):
            error_code = error_data['message']
        elif isinstance(data_message, dict):
            fields: list[str] = []
            flatten_fields(data_message, payload, fields, additional_data)
            error_code = ', '.join(sorted(fields))
    raise OwsPayeeException(
        'Failed to save tax details',
        error_code,
        additional_data,
    )