import cron from "node-cron";
import { Client } from "discord.js";
import { cfg } from "./config";
import { TGSlot } from "../types";

type PollCallback = (slot: TGSlot) => Promise<void>;
type CloseCallback = (slot: TGSlot) => Promise<void>;

let _scheduledTasks: cron.ScheduledTask[] = [];

export function scheduleSlots(
  client: Client,
  onPollOpen: PollCallback,
  onPollClose: CloseCallback
): void {
  // Clear existing schedules
  _scheduledTasks.forEach((t) => t.stop());
  _scheduledTasks = [];

  const tz    = process.env.TZ ?? "Etc/GMT-2";
  const slots = cfg("slots").filter((s) => s.active);

  for (const slot of slots) {
    // Parse poll open time
    const [openHour, openMin] = slot.pollOpens.split(":").map(Number);

    // Schedule poll open
    const openTask = cron.schedule(
      `${openMin} ${openHour} * * *`,
      () => onPollOpen(slot),
      { timezone: tz }
    );
    _scheduledTasks.push(openTask);

    // Schedule poll close (tgHour + closesAfter minutes)
    const closeMinTotal = slot.tgHour * 60 + slot.closesAfter;
    const closeHour     = Math.floor(closeMinTotal / 60) % 24;
    const closeMin      = closeMinTotal % 60;

    const closeTask = cron.schedule(
      `${closeMin} ${closeHour} * * *`,
      () => onPollClose(slot),
      { timezone: tz }
    );
    _scheduledTasks.push(closeTask);
  }

  // Weekly reset — Monday 00:00
  const resetTask = cron.schedule("0 0 * * 1", () => {
    const { resetWeek } = require("./wrank");
    resetWeek();
    console.log("W.Rank weekly reset complete.");
  }, { timezone: tz });
  _scheduledTasks.push(resetTask);

  console.log(`Scheduled ${slots.length} slot(s).`);
}