import Command from "../../core/command";
import {CommonLibrary} from "../../core/lib";

export default new Command({
    description:
        "Reacts to the a previous message in your place. You have to react with the same emote before the bot removes that reaction.",
    usage: "react <emote name> (<message ID / distance>)",
    async run($: CommonLibrary): Promise<any> {
        let target;
        let distance = 1;

        if ($.args.length >= 2) {
            const last = $.args[$.args.length - 1];

            if (/\d{17,19}/g.test(last)) {
                try {
                    target = await $.channel.messages.fetch(last);
                } catch {
                    return $.channel.send(`No valid message found by the ID \`${last}\`!`);
                }

                $.args.pop();
            }
            // The entire string has to be a number for this to match. Prevents leaCheeseAmerican1 from triggering this.
            else if (/^\d+$/g.test(last)) {
                distance = parseInt(last);

                if (distance >= 0 && distance <= 99) $.args.pop();
                else return $.channel.send("Your distance must be between 0 and 99!");
            }
        }

        if (!target) {
            // Messages are ordered from latest to earliest.
            // You also have to add 1 as well because fetchMessages includes your own message.
            target = (
                await $.message.channel.messages.fetch({
                    limit: distance + 1
                })
            ).last();
        }

        let anyEmoteIsValid = false;

        for (const search of $.args) {
            const emoji = $.client.emojis.cache.find((emoji) => emoji.name === search);

            if (emoji) {
                // Call the delete function only once to avoid unnecessary errors.
                if (!anyEmoteIsValid && distance !== 0) $.message.delete();
                anyEmoteIsValid = true;
                const reaction = await target?.react(emoji);

                // This part is called with a promise because you don't want to wait 5 seconds between each reaction.

                setTimeout(() => {
                    /// @ts-ignore
                    reaction.users.remove($.client.user);
                }, 5000);
            }
        }

        if (!anyEmoteIsValid && !$.message.deleted) $.message.react("❓");
    }
});