import qrCode from "qrcode-terminal";
import { Client } from "whatsapp-web.js";
import { getIO } from "./socket";
import Whatsapp from "../models/Whatsapp";

interface Session extends Client {
  id?: number;
}

const sessions: Session[] = [];

export const initWbot = async (whatsapp: Whatsapp): Promise<void> => {
  console.log("starting");
  try {
    const io = getIO();
    const sessionName = whatsapp.name;
    let sessionCfg;

    if (whatsapp && whatsapp.session) {
      sessionCfg = JSON.parse(whatsapp.session);
    }

    const sessionIndex = sessions.findIndex(s => s.id === whatsapp.id);
    if (sessionIndex !== -1) {
      sessions[sessionIndex].destroy();
      sessions.splice(sessionIndex, 1);
    }

    const wbot = new Client({
      session: sessionCfg,
      restartOnAuthFail: true
    });
    wbot.initialize();

    wbot.on("qr", async qr => {
      console.log("Session:", sessionName);

      qrCode.generate(qr, { small: true });

      await whatsapp.update({ qrcode: qr, status: "qrcode" });

      io.emit("whatsappSession", {
        action: "update",
        session: whatsapp
      });
    });

    wbot.on("authenticated", async session => {
      console.log("Session:", sessionName, "AUTHENTICATED");

      await whatsapp.update({
        session: JSON.stringify(session),
        status: "authenticated"
      });

      io.emit("whatsappSession", {
        action: "update",
        session: whatsapp
      });
    });

    wbot.on("auth_failure", async msg => {
      console.error("Session:", sessionName, "AUTHENTICATION FAILURE", msg);

      await whatsapp.update({ session: "" });
    });

    wbot.on("ready", async () => {
      console.log("Session:", sessionName, "READY");

      await whatsapp.update({
        status: "CONNECTED",
        qrcode: ""
      });

      io.emit("whatsappSession", {
        action: "update",
        session: whatsapp
      });

      wbot.sendPresenceAvailable();
    });

    wbot.id = whatsapp.id;
    sessions.push(wbot);
  } catch (err) {
    console.log(err);
  }
};

export const getWbot = (whatsappId: number): Session | null => {
  const sessionIndex = sessions.findIndex(s => s.id === whatsappId);

  if (sessionIndex === -1) {
    console.log("This Wbot session is not initialized");
    return null;
  }
  return sessions[sessionIndex];
};

export const removeWbot = (whatsappId: number): void => {
  try {
    const sessionIndex = sessions.findIndex(s => s.id === whatsappId);
    if (sessionIndex !== -1) {
      sessions[sessionIndex].destroy();
      sessions.splice(sessionIndex, 1);
    }
  } catch (err) {
    console.log(err);
  }
};