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

const documentation = {
    "add quote by \"<author>\" <NEWLINE> <quote>": {
        auth: true,
        description: "Adds a quote"
    },
    "remove quote <quote_index>": {
        auth: true,
        description: "Removes quote. Use \"quotes\" to get the <quote_index>!"
    },
    "quotes": {
        auth: true,
        description: "Lists all known quotes."
    },
    "random quote": {
        auth: false,
        description: "Shows a random quote by someone special..."
    }
};

const quotePattern = /add quote by "([^"]+)"\s*(.*)/i;

function minify(str, maxLength) {
    let result = str.replace("\n", "");
    if (result.length > maxLength)
        result = `${result.substring(0, maxLength - 3)}...`;
    return result;
}

const commands = [
    {
        pattern: "add quote",
        action: (msg, c) => {
            if (!util.isAuthorised(msg.member))
                return;
    
            let result = quotePattern.exec(c);
    
            if (result == null)
                return;
    
            let author = result[1].trim();
            let message = result[2].trim();
    
            db.get("quotes").push({
                author: author,
                message: message
            }).write();
    
            msg.channel.send(`${msg.author.toString()} Added quote #${db.get("quotes").size().value()}!`);
        }
    },
    {
        pattern: "random quote",
        action: (msg) => {
            if (db.get("quotes").size().value() == 0) {
                msg.channel.send("I have no quotes!");
                return;
            }
            let quote = db.get("quotes").randomElement().value();
            let index = db.get("quotes").indexOf(quote).value();
            msg.channel.send(`Quote #${index + 1}:\n*"${quote.message}"*\n- ${quote.author}`);
        }
    },
    {
        pattern: "remove quote",
        action: (msg, c) => {
            let quoteNum = c.substring("remove quote".length).trim();
            let val = parseInt(quoteNum);
            if (isNaN(val) || db.get("quotes").size().value() < val - 1)
                return;
    
            db.get("quotes").pullAt(val - 1).write();
            msg.channel.send(`${msg.author.toString()} Removed quote #${val}!`);
        }
    },
    {
        pattern: "quotes",
        action: msg => {
            if (!util.isAuthorised(msg.member)) {
                msg.channel.send(`${msg.author.toString()} To prevent spamming, only bot moderators can view all quotes!`);
                return;
            }
    
            if (db.get("quotes").size().value() == 0) {
                msg.channel.send("I have no quotes!");
                return;
            }
    
            let quotes = db.get("quotes").reduce((prev, curr, i) => `${prev}[${i+1}] "${minify(curr.message, 10)}" by ${curr.author}\n`, "\n").value();
            msg.channel.send(`${msg.author.toString()}I know the following quotes:\n\`\`\`${quotes}\`\`\``);
        }
    }
];


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