// @ts-check

const http = require("http");
const getAuthCookieNames = require("../package-shared/functions/backend/cookies/get-auth-cookie-names");
const decrypt = require("../package-shared/functions/dsql/decrypt");
const EJSON = require("../package-shared/utils/ejson");
const {
    deleteAuthFile,
} = require("../package-shared/functions/backend/auth/write-auth-files");

/**
 * Logout user
 * ==============================================================================
 * @param {object} params - Single Param object containing params
 * @param {string} params.encryptedUserString - Encrypted User String
 * @param {http.ServerResponse & Object<string, any>} [params.response] - Http response object
 * @param {string} [params.database] - Target database name(slug): optional
 * @param {string | number} [params.dsqlUserId]
 *
 * @returns {{success: boolean, payload: string, cookieNames?: any}}
 */
function logoutUser({ response, database, dsqlUserId, encryptedUserString }) {
    /**
     * Check Encryption Keys
     *
     * @description Check Encryption Keys
     */
    try {
        const decryptedUserJSON = decrypt({
            encryptedString: encryptedUserString,
        });
        const userObject =
            /** @type {import("../package-shared/types").DATASQUIREL_LoggedInUser | undefined} */ (
                EJSON.parse(decryptedUserJSON)
            );

        if (!userObject?.csrf_k)
            throw new Error("Invalid User. Please check key");

        const cookieNames = getAuthCookieNames({
            database,
            userId: dsqlUserId || process.env.DSQL_API_USER_ID,
        });
        const authKeyName = cookieNames.keyCookieName;
        const csrfName = cookieNames.csrfCookieName;

        response?.setHeader("Set-Cookie", [
            `${authKeyName}=null;max-age=0`,
            `${csrfName}=null;max-age=0`,
        ]);

        const csrf = userObject.csrf_k;
        deleteAuthFile(csrf);

        return {
            success: true,
            payload: "User Logged Out",
            cookieNames,
        };
    } catch (error) {
        console.log(error);

        return {
            success: false,
            payload: "Logout Failed",
        };
    }

    /** ********************************************** */
    /** ********************************************** */
    /** ********************************************** */
}

/** ********************************************** */
/** ********************************************** */
/** ********************************************** */

module.exports = logoutUser;