import { Gamelib } from "./gamelib.js";

export class GamelibCompleter {
    getCompletions(_editor, session, pos, prefix, callback) {
        // Check if user has written "lib."
        const line = session.doc["$lines"][pos.row].slice(0, pos.column);
        if (!line.match(/lib\.\w*$/)) {
            callback(null, []);
            return;
        }

        if (prefix.length === 0) {
            callback(null, []);
            return;
        }

        const functions = Object.getOwnPropertyNames(Gamelib.prototype);

        const wordList = functions.map((func) => {
            const definition = Gamelib.prototype[func].toString();
            const signature = definition.slice(0, definition.indexOf(")") + 1);

            return {
                "name": func,
                "value": func,
                "snippet": func + "($0)",
                "caption": func,
                "score": 300,
                "meta": "function",
                "docHTML": signature,
            };
        });

        return callback(null, wordList);
    }
}