/**
 * Drops all user collections.
 */
import {FixtureHelpers} from "jstests/libs/fixture_helpers.js";

assert.neq(typeof db, "undefined", "No `db` object, is the shell connected to a mongod?");
assert(FixtureHelpers.isMongos(db), "not connected to mongos");

let balSettingResult = assert.commandWorked(db.adminCommand({balancerStatus: 1}));
if (balSettingResult.mode !== "off") {
    assert.commandWorked(db.adminCommand({balancerStop: 1}));
}

db.adminCommand({listDatabases: 1}).databases.forEach((dbEntry) => {
    const dbName = dbEntry.name;
    if (dbName == "admin" || dbName == "config" || dbName == "local") return;
    // This will drop collections and views (including timeseries collections).
    db.getSiblingDB(dbName)
        .getCollectionNames()
        .forEach((collName) => {
            if (collName.startsWith("system.")) return;

            assert.commandWorked(db.getSiblingDB(dbName).runCommand({drop: collName}));
        });
});

// Turn balancer back on if it was not off earlier.
if (balSettingResult.mode !== "off") {
    assert.commandWorked(db.adminCommand({balancerStart: 1}));
}