import {getLanguageExtension} from "./languages";
import {Compartment} from "@codemirror/state"
import {EditorView} from "@codemirror/view"

const viewLangCompartments = new WeakMap();

/**
 * Create a new editor view.
 *
 * @param {Object} config
 * @returns {EditorView}
 */
export function createView(config) {
    const langCompartment = new Compartment();
    config.extensions.push(langCompartment.of([]));

    const ev = new EditorView(config);

    viewLangCompartments.set(ev, langCompartment);

    return ev;
}

/**
 * Set the language mode of an EditorView.
 *
 * @param {EditorView} ev
 * @param {string} modeSuggestion
 * @param {string} content
 */
export function updateViewLanguage(ev, modeSuggestion, content) {
    const compartment = viewLangCompartments.get(ev);
    const language = getLanguageExtension(modeSuggestion, content);

    ev.dispatch({
        effects: compartment.reconfigure(language ? language : [])
    })
}