const ESMCommand = require("../esm_command");
const Path = require("path");
const Fs = require("fs");
module.exports = class ESMCommand_Changelog extends ESMCommand {
    constructor(bot) {
        super(bot);

        this.commandParams = {
            version: {
                regex: /[\d.]+/,
                nullable: true
            }
        };

        this.information = {
            category: "system",
            params: "<version>",
            help: "Shows the highlights for the current version or any previous versions of ESM"
        };

        this.configuration = {
            allowedInTextChannels: {
                modifiable: true,
                default: true
            }
        };
    }

    async fromDiscord() {
        let updateInfo = {},
            version = this.ESMBot.config.VERSION;
        if (this.util.isNull(this.params.version)) {
            let path = Path.resolve(`./changelogs/${version}.json`);
            if (!Fs.existsSync(path)) {
                return this.ESMBot.send(this.message.channel, `${this.message.author.toString()}, well shoot, I messed up and forgot to include the changelog for this version`);
            }
            updateInfo = JSON.parse(Fs.readFileSync(path, "utf8"));
        } else {
            let path = Path.resolve(`./changelogs/${this.params.version}.json`);
            if (!Fs.existsSync(path)) {
                return this.ESMBot.send(this.message.channel, `${this.message.author.toString()}, \`${this.params.version}\` is not a valid version.`);
            }
            updateInfo = JSON.parse(Fs.readFileSync(path, "utf8"));
            version = this.params.version;
        }

        let embed = new this.ESMBot.discord.MessageEmbed();
        embed.setColor(this.ESMBot.colors.GREEN);
        embed.setAuthor(this.client.user.username, this.client.user.avatarURL());
        embed.setTimestamp(this.ESMBot.moment.utc());

        embed.setDescription(`__${version} Highlights:__`);

        if (!this.util.isEmpty(updateInfo.highlights)) {
            for (let highlight in updateInfo.highlights) {
                embed.addField(highlight, updateInfo.highlights[highlight]);
            }
        } else {
            return this.ESMBot.send(this.message.channel, `${this.message.author.toString()}, it looks like there aren't any highlights for \`${version}\`.`);
        }

        this.ESMBot.send(this.message.channel, embed);
    }
}