import { Paginator } from "array-paginator";
import {
  ActionRowBuilder,
  ButtonBuilder,
  ButtonStyle,
  MessageComponentInteraction,
} from "discord.js";
import type { Message, ButtonInteraction, TextChannel } from "discord.js";
import type { IOptions, Page } from "./ts/interfaces";

export class EmbedPaginator {
  firstAndLast: boolean;
  channel: TextChannel;
  pager: Paginator<any>;
  summoner: string;
  // emojis: IObject
  message: Message | null;
  constructor(channel: TextChannel, pages: Page[] = [], options: IOptions) {
    this.firstAndLast = options.firstAndLast ?? true;
    this.channel = channel;
    this.pager = new Paginator(pages, 1);
    this.summoner = options.summoner;
    this.message = null;
    // this.emojis = {
    // 	first: '⏮️',
    // 	previous: '◀️',
    // 	next: '▶️',
    // 	last: '⏭️',
    // 	all: ['⏮️', '◀️', '▶️', '⏭️'],
    // }
    this.init();
  }
  async init() {
    // Verifications :
    if (this.pager.total < 2)
      throw new Error("A Pagination Embed must contain at least 2 pages");
    // Send the message
    this.message = await this.channel.send({
      embeds: this.pager.first()!,
      // @ts-ignore
      components: [this.getComponents()],
    });
    // React to the message
    // for (const emoji in this.emojis) {
    // 	if (emoji === 'all') continue;
    // 	await this.message!.react(this.emojis[emoji])
    // }
    this.listenReactions();
  }
  getComponents() {
    const row = new ActionRowBuilder();
    if (this.firstAndLast)
      row.addComponents(
        new ButtonBuilder()
          .setLabel("First")
          .setCustomId("first")
          .setStyle(ButtonStyle.Secondary)
          .setDisabled(this.pager.hasFirst() ? false : true)
      );
    row.addComponents(
      new ButtonBuilder()
        .setLabel("Previous")
        .setCustomId("previous")
        .setStyle(ButtonStyle.Secondary)
        .setDisabled(this.pager.hasPrevious() ? false : true)
    );
    row.addComponents(
      new ButtonBuilder()
        .setLabel("Next")
        .setCustomId("next")
        .setStyle(ButtonStyle.Secondary)
        .setDisabled(this.pager.hasNext() ? false : true)
    );
    if (this.firstAndLast)
      row.addComponents(
        new ButtonBuilder()
          .setLabel("Last")
          .setCustomId("last")
          .setStyle(ButtonStyle.Secondary)
          .setDisabled(this.pager.hasLast() ? false : true)
      );
    return row;
  }
  listenReactions() {
    const filter = (i: MessageComponentInteraction) =>
      i.message.id === this.message!.id && i.user.id === this.summoner;
    const collector = this.channel.createMessageComponentCollector({
      filter: filter,
    });
    collector.on("collect", async (i: ButtonInteraction) => {
      switch (i.customId) {
        case "first":
          if (this.pager.first()) this.changePage(this.pager.first(), i);
          break;
        case "previous":
          if (this.pager.hasPrevious())
            this.changePage(this.pager.previous(), i);
          break;
        case "next":
          if (this.pager.hasNext()) this.changePage(this.pager.next(), i);
          break;
        case "last":
          if (this.pager.last()) this.changePage(this.pager.last(), i);
          break;
      }
    });
  }
  changePage(page: any, interaction: ButtonInteraction) {
    interaction.update({
      embeds: page.embeds,
      // @ts-ignore
      components: [this.getComponents(), ...page.components],
    });
  }
}