import { Investigation } from "@models/investigation/investigation.model";
import { getLogger } from "@utils/asyncLocalStorage";
import { Types } from "mongoose";
/**
 * Ensures that the author of a given investigation is set.
 *
 * If the investigation exists and does not already have a valid author, this method sets the author
 * to the provided `authorId` and updates the `dateModified` field.
 * @category Services
 * @param {string} investigationId - The ID of the investigation to check.
 * @param {Types.ObjectId} authorId - The ObjectId of the author to set.
 * @returns {Promise<IInvestigation | null>} - The updated investigation object, or `null` if the investigation does not exist or already has a valid author.
 * @throws {Error} If there is an error during the process of fetching or saving the investigation.
 */
export async function ensureInvestigationAuthor(investigationId, authorId) {
    const logger = getLogger();
    try {
        const investigation = await Investigation.findById(investigationId);
        if (!investigation) {
            return null;
        }
        const currentAuthor = investigation.metadata?.author;
        if (currentAuthor && Types.ObjectId.isValid(currentAuthor.toString())) {
            return null;
        }
        if (!investigation.metadata) {
            investigation.metadata = {};
        }
        investigation.metadata.author = authorId;
        investigation.metadata.dateModified = new Date();
        const saved = await investigation.save();
        return saved.toObject();
    }
    catch (error) {
        logger.error({ error, investigationId, authorId }, "Failed to ensure investigation author");
        throw new Error("Failed to ensure investigation author");
    }
}