import { SubscriptionPriceDto } from "../../application/dtos/subscriptions/SubscriptionPriceDto";
import { PricingModel } from "../../application/enums/subscriptions/PricingModel";
import { SubscriptionBillingPeriod } from "../../application/enums/subscriptions/SubscriptionBillingPeriod";


async function getPlanFromForm(form: FormData, product: any) {
    const productId = form.get("product-id")?.toString() ?? "";
    const billingPeriod = Number(form.get("billing-period")) as SubscriptionBillingPeriod;
    const currency = form.get("currency")?.toString() ?? "";
    const quantity = Number(form.get("quantity"));
    const coupon = form.get("coupon")?.toString();
    const isUpgrade = form.get("is-upgrade")?.toString() === "true";
    const isDowngrade = form.get("is-downgrade")?.toString() === "true";

    //const product = await getSubscriptionProduct(productId);
    if (!product) {
        throw Error("Invalid product");
    }

    let flatPrice: SubscriptionPriceDto | undefined = undefined;
    let freeTrialDays: number | undefined = undefined;
    if (product.model === PricingModel.ONCE) {
        flatPrice = product.prices.find((f) => f.currency === currency && f.billingPeriod === SubscriptionBillingPeriod.ONCE);
    } else {
        flatPrice = product.prices.find((f) => f.currency === currency && f.billingPeriod === billingPeriod);
    }
    const usageBasedPrices = product?.usageBasedPrices?.filter((f) => f.currency === currency);

    if (!flatPrice && usageBasedPrices.length === 0) {
        throw Error("Invalid price");
    }
    let mode: "payment" | "setup" | "subscription" = "subscription";
    const line_items: { price: string; quantity?: number }[] = [];
    if (product.model === PricingModel.ONCE) {
        mode = "payment";
    }

    if (flatPrice) {
        line_items.push({ price: flatPrice.stripeId, quantity });
        if (flatPrice.trialDays > 0) {
            freeTrialDays = flatPrice.trialDays;
        }
    }
    usageBasedPrices.forEach((usageBasedPrice) => {
        line_items.push({ price: usageBasedPrice.stripeId });
    });

    return {
        mode,
        line_items,
        product,
        flatPrice,
        usageBasedPrices,
        freeTrialDays,
        coupon,
        isUpgrade,
        isDowngrade,
    };
}

export default {
    getPlanFromForm,
};