const db = require("../db.js");
const util = require("../util.js");

const commands = {
    "make guide": msg => {
        if (!util.isAuthorised(msg.member)) return;
        let content = msg.content.substring(msg.content.indexOf("make guide") + "make guide ".length);
        let guideName = content.substring(0, content.indexOf("\n")).trim();
        let guideContent = content.substring(content.indexOf("\n")).trim();

        let guide = db.get("guides").find({
            name: guideName
        });

        if (!guide.isUndefined().value()) {
            guide.assign({
                content: guideContent
            }).write();
        } else {
            db.get("guides")
                .push({
                    name: guideName,
                    content: guideContent
                })
                .write();
        }

        msg.channel.send(
            `${msg.author.toString()} Added/updated "${guideName}"!`
        );
    },
    "delete guide": (msg, s) => {
        if (!util.isAuthorised(msg.member)) return;
        let guideName = s.substring("delete guide ".length).trim();
        let val = db.get("guides").find({
            name: guideName
        });

        if (val.isUndefined().value()) {
            msg.channel.send(`${msg.author.toString()} No guide "${guideName}"!`);
            return;
        }

        db.get("guides")
            .remove({
                name: guideName
            })
            .write();
        msg.channel.send(
            `${msg.author.toString()} Removed guide "${guideName}"!`
        );
    }
};

const onDirectMention = (msg, content, actionsDone) => {
    if (actionsDone)
        return false;

    let parts = content.trim().split(" ");
    let guide = db
        .get("guides")
        .map(g => Object.assign({
            parts: g.name.toLowerCase().split(" ")
        }, g))
        .sortBy(g => g.parts.length)
        .maxBy(k => db._.intersection(parts, k.parts).length)
        .value();
    
    let hits =
        guide !== undefined &&
        db._.intersection(guide.name.toLowerCase().split(" "), parts).length > 0;
    
    if (hits) {
        msg.channel.send(guide.content);
        return true;
    }
    return false;
};

module.exports = {
    commands: commands,
    onDirectMention: onDirectMention
};