export type FormFeedbackState =
    | 'idle'
    | 'loading'
    | 'success'
    | 'validation'
    | 'network'
    | 'server'
    | 'cancelled';

export const formRequestHeader = 'X-KanbanGit-Form-Request';

function isRecord(value: unknown): value is Record<string, unknown> {
    return typeof value === 'object' && value !== null;
}

/** Match failures to one submission, without intercepting other forms or polling. */
export function matchesFormRequest(
    config: unknown,
    requestId: string | null,
): boolean {
    if (!requestId || !isRecord(config) || !isRecord(config.headers)) {
        return false;
    }

    return config.headers[formRequestHeader] === requestId;
}

/** Runtime exceptions and cancellations are not network failures. */
export function isFormNetworkFailure(
    error: unknown,
    requestId: string | null,
): boolean {
    return (
        isRecord(error) &&
        error.isAxiosError === true &&
        !error.response &&
        ['ERR_NETWORK', 'ECONNABORTED', 'ETIMEDOUT'].includes(
            String(error.code),
        ) &&
        matchesFormRequest(error.config, requestId)
    );
}