import Command from '../../../core/command';
import $ from '../../../core/lib';
import { Storage, getPrefix } from '../../../core/structures';
import { isAuthorized, getMoneyEmbed, getSendEmbed } from './eco-utils';
import { ShopItems, ShopItem } from './eco-shop-items';
import { EmbedField } from 'discord.js';

export const ShopCommand = new Command({
  description: 'Displays the list of items you can buy in the shop.',
  async run({ guild, channel, author }) {
    if (isAuthorized(guild, channel)) {
      function getShopEmbed(selection: ShopItem[], title = 'Shop') {
        const fields: EmbedField[] = [];

        for (const item of selection)
          fields.push({
            name: `**${item.title}** (${getPrefix(guild)}eco buy ${
              item.usage
            })`,
            value: `${item.description} Costs ${$(item.cost).pluralise(
              'Mon',
              's',
            )}.`,
            inline: false,
          });

        return {
          embed: {
            color: 0xf1c40f,
            title: title,
            fields: fields,
            footer: {
              text: 'Mon Shop | TravBot Services',
            },
          },
        };
      }

      // In case there's just one page, omit unnecessary details.
      if (ShopItems.length <= 5) channel.send(getShopEmbed(ShopItems));
      else {
        const shopPages = $(ShopItems).split(5);
        const pageAmount = shopPages.length;
        const msg = await channel.send(
          getShopEmbed(shopPages[0], `Shop (Page 1 of ${pageAmount})`),
        );

        $.paginate(msg, author.id, pageAmount, (page) => {
          msg.edit(
            getShopEmbed(
              shopPages[page],
              `Shop (Page ${page + 1} of ${pageAmount})`,
            ),
          );
        });
      }
    }
  },
});

export const BuyCommand = new Command({
  description: 'Buys an item from the shop.',
  usage: '<item>',
  async run({ guild, channel, args, message, author }) {
    if (isAuthorized(guild, channel)) {
      let found = false;

      let amount = 1; // The amount the user is buying.

      // For now, no shop items support being bought multiple times. Uncomment these 2 lines when it's supported/needed.
      //if (/\d+/g.test(args[args.length - 1]))
      //amount = parseInt(args.pop());

      let requested = args.join(' '); // The item the user is buying.

      for (let item of ShopItems) {
        if (item.usage === requested) {
          const user = Storage.getUser(author.id);
          const cost = item.cost * amount;

          if (cost > user.money) {
            channel.send('Not enough Mons!');
          } else {
            user.money -= cost;
            Storage.save();
            item.run(message, cost, amount);
          }

          found = true;
          break;
        }
      }

      if (!found)
        channel.send(
          `There's no item in the shop that goes by \`${requested}\`!`,
        );
    }
  },
});