const day = 1000 * 60 * 60 * 24;

export const dataStart = new Date("2024-01-01 00:00:00").getTime();
export const dataEnd = new Date("2024-12-30 23:59:59").getTime();

let seed = 1;
function random() {
  seed = (seed * 16807) % 2147483647;
  return (seed - 1) / 2147483646;
}

export function getData() {
  const data: Array<Datum> = [];
  seed = 1;
  for (let time = dataStart; time <= dataEnd; time += day) {
    let price;
    if (data.length === 0) {
      price = 1000 + random() * 100;
    } else {
      price = data[data.length - 1].price + random() * 20 - 10;
    }
    data.push({ time, price });
  }

  return data;
}

type Datum = { time: number; price: number };