export function calcCustomSubscriptionPrice(tokenCount: number, period: number) {
    const MIN_TOKEN_COUNT = 1000;
    const MAX_DISCOUNT = 0.85;
    const DISCOUNT_PER_STEP = 0.005;
    const STEP = 500;
    const BASE_PRICE = 0.95;

    if (tokenCount < 0) {
        throw new Error('Token count must be a non-negative integer');
    }

    if (tokenCount < MIN_TOKEN_COUNT) {
        throw new Error(`Token count must be at least ${MIN_TOKEN_COUNT}`);
    }

    const discount = Math.max(0, (tokenCount - MIN_TOKEN_COUNT) / STEP) * DISCOUNT_PER_STEP;
    const priceMultiplier = Math.max(BASE_PRICE - discount, MAX_DISCOUNT);
    return Math.round(tokenCount * priceMultiplier * period);
}