const { Signer } = require("@aws-sdk/rds-signer");
const mysql = require("mysql2/promise");

const headers = {
    "Content-Type": "application/json",
};

const rdsProps = {
  hostname: "???.???.ap-south-1.rds.amazonaws.com",
  port: 3306,
  username: "???",
  db: "???",
  region: "ap-south-1",
};

const signer = new Signer(rdsProps);

// todo actual persistence query
const sql = "select `rep_name`, `rep_email` from `accounts` where `id` = ? and `name` = ?";


async function persist(args) {
    const connection = await mysql.createConnection({
        host: rdsProps.hostname,
        user: rdsProps.username,
        database: rdsProps.db,
        ssl: "Amazon RDS",
        connectTimeout: 5 * 1000,
        authPlugins: {
          mysql_clear_password: () => () => signer.getAuthToken(),
        }
      });

    // todo change to actual insert ignore query
    const [rows, meta] = await connection.execute(sql, args);
    return rows;
}


function sanitise(args) {
    // todo, throw if bad
    return args;
}


exports.handler = async (event, context) => {
    console.log("Event:", JSON.stringify(event, null, 2));

    let body;
    let statusCode = "200";
    try {
        switch (event.httpMethod) {
            case "POST":
                // vaildate api keys
                // todo extract args from event -> json of fields submitted
                body = await persist(sanitise([1,"foo"]));
                break;
            default:
                throw new Error(`Unsupported method "${event.httpMethod}"`);
        }
    } catch (err) {
        statusCode = "400";
        body = err.message;
    } finally {
        body = JSON.stringify(body);
    }

    // todo sent notification of successfully lead ingest
    return {
        statusCode,
        body,
        headers,
    };
};