import fs from "fs"

const CLASSES: string[] = [
  "A1a", "A1b", "A1c", "C1a", "C1b", "C1c", "A2", "C2a", "C2b", "C2c", "E2", "C3a", "C3b", "C3c", "E3"
];

function formatDate(date: Date): string {
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, "0");
  const day = String(date.getDate()).padStart(2, "0");
  return `${year}-${month}-${day}`;
}

const EXAMPLE_SCHEDULE: (string | null)[] = [
  "Verze 1 API bude ukončena",
  "Prosím aktualizujte si aplikaci.",
  "Po ukončení Vám nebude fungovat",
  "mimořádný rozvrh.",
  null,
  "Pokud jste vývojář aplikace,",
  "podívejte se na dokumentaci na",
  "jecnarozvrh.jzitnik.dev",
  null,
  null
];

function getCurrentWeekMondayToFriday(referenceDate: Date = new Date()): string[] {
  const date = new Date(referenceDate);
  const day = date.getDay();
  const diffToMonday = day === 0 ? -6 : 1 - day;
  const monday = new Date(date);
  monday.setDate(date.getDate() + diffToMonday);
  const week: string[] = [];
  for (let i = 0; i < 5; i++) {
    const d = new Date(monday);
    d.setDate(monday.getDate() + i);
    week.push(formatDate(d));
  }
  return week;
}

interface ScheduleData {
  schedule: Record<string, (string | null)[]>[];
  props: { date: string; priprava: boolean }[];
  status: { lastUpdated: string };
}

export default function generateArchivedV1_V2(): void {
  const dates = getCurrentWeekMondayToFriday();
  const currentDate = new Date();
  const lastUpdated = currentDate.getHours().toString().padStart(2, "0") + ":" + currentDate.getMinutes().toString().padStart(2, "0");

  const data: ScheduleData = {
    schedule: [],
    props: [],
    status: {
      lastUpdated
    }
  };

  for (const date of dates) {
    data.props.push({
      date,
      priprava: false
    });

    const d: Record<string, (string | null)[]> = {};

    for (const cls of CLASSES) {
      d[cls] = EXAMPLE_SCHEDULE;
    }

    data.schedule.push(d);
  }

  fs.writeFileSync("volume/db/v1.json", JSON.stringify(data, null, 2));
  fs.writeFileSync("volume/db/v2.json", JSON.stringify(data, null, 2));
}