movie - js advanced exam

class Movie {
  constructor(movieName, ticketPrice) {
    this.movieName = movieName;
    this.ticketPrice = Number(ticketPrice);
    this.screenings = [];
    this.totalProfit = 0;
    this.ticketsCount = 0;
  }

  newScreening(date, hall, description) {
    let obj = { date: date, hall: hall, desc: description };
    let screen = this.screenings.find(
      (o) => o.date === date && o.hall === hall
    );
    if (screen === undefined) {
      this.screenings.push(obj);
      return `New screening of ${this.movieName} is added.`;
    } else {
      throw new Error(`Sorry, ${hall} hall is not available on ${date}`);
    }
  }

  endScreening(date, hall, soldTickets) {
    let screen = this.screenings.find(
      (o) => o.date === date && o.hall === hall
    );
    if (screen === undefined) {
      throw new Error(
        `Sorry, there is no such screening for ${this.movieName} movie.`
      );
    } else {
      let currentProfit = Number(soldTickets) * Number(this.ticketPrice);
      this.totalProfit += currentProfit;
      this.ticketsCount += Number(soldTickets);
      let idx = 0;
      for (let i = 0; i < this.screenings.length; i++) {
        if (
          this.screenings[i].date === date &&
          this.screenings[i].hall === hall
        ) {
          idx = i;
          break;
        }
      }
      this.screenings.splice(idx, 1);
      return `${this.movieName} movie screening on ${date} in ${hall} hall has ended. Screening profit: ${currentProfit}`;
    }
  }

  toString() {
    let result = [
      `${this.movieName} full information:`,
      `Total profit: ${this.totalProfit.toFixed(0)}$`,
      `Sold Tickets: ${this.ticketsCount}`,
    ];
    if (this.screenings.length > 0) {
      result.push(`Remaining film screenings:`);
      let sorted = this.screenings.sort((a, b) => a.hall.localeCompare(b.hall));
      for (const s of sorted) {
        result.push(`${s.hall} - ${s.date} - ${s.desc}`);
      }
    } else {
      result.push(`No more screenings!`);
    }
    return result.join("\n");
  }
}