// @ts-check

const mysql = require("serverless-mysql");
const grabDbSSL = require("../grabDbSSL");

/**
 * DSQL user read-only DB handler
 * @param {object} params
 * @param {string} params.paradigm
 * @param {string} params.database
 * @param {string} params.queryString
 * @param {string[]} [params.queryValues]
 */
async function LOCAL_DB_HANDLER(/** @type {any[]} */ ...args) {
    const MASTER = mysql({
        config: {
            host: process.env.DSQL_DB_HOST,
            user: process.env.DSQL_DB_USERNAME,
            password: process.env.DSQL_DB_PASSWORD,
            database: process.env.DSQL_DB_NAME,
            port: process.env.DSQL_DB_PORT
                ? Number(process.env.DSQL_DB_PORT)
                : undefined,
            charset: "utf8mb4",
            ssl: grabDbSSL(),
        },
        onConnect: () => {
            console.log("Connection Successful!");
        },
        onConnectError: (/** @type {any} */ err) => {
            console.log("Connection Error", err.message);
        },
        onError: (/** @type {any} */ err) => {
            console.log("Client Error", err.message);
        },
    });

    console.log("Querying ...");

    try {
        const results = await MASTER.query(...args);
        await MASTER.end();

        return JSON.parse(JSON.stringify(results));
    } catch (/** @type {any} */ error) {
        console.log("DB Error =>", error.message);
        return {
            success: false,
            error: error.message,
        };
    }
}

module.exports = LOCAL_DB_HANDLER;