import { is_string } from "./common.js";
import { IndexOptions } from "./type.js";

/**
 * @enum {Object}
 * @const
 */

const presets = {

    memory: {
        resolution: 1
    },

    performance: {
        resolution: 6,
        fastupdate: /* tag? */ /* stringify */ /* stringify */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */ // splice:
        !0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/,
        context: {
            depth: 1,
            resolution: 3
        }
    },

    match: {
        tokenize: "forward"
    },

    score: {
        resolution: 9,
        context: {
            depth: 2,
            resolution: 9
        }
    }
};

/**
 *
 * @param {!IndexOptions|string} options
 * @return {IndexOptions}
 */

export default function apply_preset(options) {

    const preset = is_string(options) ? options : options.preset;

    if (preset) {
        options = Object.assign({}, presets[preset], /** @type {Object} */options);
    }

    return options;
}