// @ts-check

////////////////////////////////////////
////////////////////////////////////////
////////////////////////////////////////

// require("dotenv").config({ path: "../../.env" });
const noDatabaseDbHandler = require("../utils/noDatabaseDbHandler");
const dbHandler = require("../utils/dbHandler");

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

/**
 * @typedef {object} GrantType
 * @property {string} database - Database Name
 * @property {string} table - Table Name
 * @property {string[]} privileges - Privileges
 */

// const mariadbUserFlagIndex = process.argv.findIndex((arg) => arg == "--user");
// const mariadbUser =
//     mariadbUserFlagIndex > 0 ? process.argv[mariadbUserFlagIndex + 1] : null;

// //////////////////////////////////////////////
// //////////////////////////////////////////////

// const mariadbUserHostFlagIndex = process.argv.findIndex(
//     (arg) => arg == "--host"
// );
// const mariadbUserHost =
//     mariadbUserHostFlagIndex > 0
//         ? process.argv[mariadbUserHostFlagIndex + 1]
//         : null;

// //////////////////////////////////////////////
// //////////////////////////////////////////////

// const newGrantsJSONFlagIndex = process.argv.findIndex(
//     (arg) => arg == "--grants"
// );
// const newGrantsJSON =
//     newGrantsJSONFlagIndex > 0
//         ? process.argv[newGrantsJSONFlagIndex + 1]
//         : null;

// //////////////////////////////////////////////
// //////////////////////////////////////////////

// if (!mariadbUser) {
//     console.log(`No user provided. \x1b[35m\`--user\`\x1b[0m flag is required`);
//     process.exit();
// }

// if (!mariadbUserHost) {
//     console.log(`No Host provided. \x1b[35m\`--host\`\x1b[0m flag is required`);
//     process.exit();
// }

// if (!newGrantsJSON) {
//     console.log(
//         `No grants JSON provided. \x1b[35m\`--grants\`\x1b[0m flag is required, and it must be a JSON string`
//     );
//     process.exit();
// }

//////////////////////////////////////////////
//////////////////////////////////////////////

/**
 * Handle Grants for Users
 * ==============================================================================
 * @param {object} params - Single object params
 * @param {string} params.username - Username
 * @param {string} params.host - Host
 * @param {GrantType[]} params.grants - Grants
 * @param {string} params.userId
 *
 * @returns {Promise<boolean>} success
 */
async function handleGrants({ username, host, grants, userId }) {
    let success = false;

    console.log(`Handling Grants for User =>`, username, host);

    if (!username) {
        console.log(`No username provided.`);
        return success;
    }

    if (!host) {
        console.log(
            `No Host provided. \x1b[35m\`--host\`\x1b[0m flag is required`
        );
        return success;
    }

    if (!grants) {
        console.log(`No grants Array provided.`);
        return success;
    }

    try {
        const existingUser = await noDatabaseDbHandler(
            `SELECT * FROM mysql.user WHERE User = '${username}' AND Host = '${host}'`
        );

        const isUserExisting = Boolean(existingUser?.[0]?.User);

        if (isUserExisting) {
            const userGrants = await noDatabaseDbHandler(
                `SHOW GRANTS FOR '${username}'@'${host}'`
            );

            for (let i = 0; i < userGrants.length; i++) {
                const grantObject = userGrants[i];
                const grant = grantObject?.[Object.keys(grantObject)[0]];

                if (grant?.match(/GRANT .* PRIVILEGES ON .* TO/)) {
                    const revokeGrantText = grant
                        .replace(/GRANT/, "REVOKE")
                        .replace(/ TO /, " FROM ");

                    const revokePrivilege = await noDatabaseDbHandler(
                        revokeGrantText
                    );
                }
            }

            /**
             * @type {GrantType[]}
             */
            const grantsArray = grants;

            for (let i = 0; i < grantsArray.length; i++) {
                const grantObject = grantsArray[i];
                const { database, table, privileges } = grantObject;

                const tableText = table == "*" ? "*" : `\`${table}\``;
                const databaseText =
                    database == "*"
                        ? `\`${process.env.DSQL_USER_DB_PREFIX}${userId}_%\``
                        : `\`${database}\``;

                const privilegesText = privileges.includes("ALL")
                    ? "ALL PRIVILEGES"
                    : privileges.join(", ");

                const grantText = `GRANT ${privilegesText} ON ${databaseText}.${tableText} TO '${username}'@'${host}'`;

                const grantPriviledge = await noDatabaseDbHandler(grantText);
            }
        }

        success = true;

        //////////////////////////////////////////////
        //////////////////////////////////////////////
        //////////////////////////////////////////////
    } catch (/** @type {any} */ error) {
        console.log(`Error in adding SQL user =>`, error.message);
    }

    return success;

    ////////////////////////////////////////
    ////////////////////////////////////////
    ////////////////////////////////////////
}

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

module.exports = handleGrants;