import { fd, auth, get, post } from "$lib/utils";
import { error, fail, redirect } from "@sveltejs/kit";

export async function load({ params, parent }) {
  let { user } = await parent();
  if (!user) redirect(307, "/register");

  let data;

  try {
    let { lnurl } = params;
    data = await get(`/decode?text=${lnurl}`);
  } catch (e) {
    error(500, e.message);
  }

  if (!["payRequest", "withdrawRequest"].includes(data.tag))
    error(500, "We only support LNURLp and LNURLw at this time");

  return data;
}

export const actions = {
  pay: async ({ cookies, fetch, request }) => {
    let error;

    let { callback, amount, minSendable, maxSendable } = await fd(request);
    minSendable = Math.round(minSendable / 1000);
    maxSendable = Math.round(maxSendable / 1000);

    if (amount < minSendable)
      error = `Amount must be at least ${minSendable} sats`;
    if (amount > maxSendable)
      error = `Amount must be at most ${maxSendable} sats`;
    if (error) return fail(400, { error });

    let { pr } = await fetch(`${callback}?amount=${amount * 1000}`).then((r) =>
      r.json()
    );
    redirect(307, `/send/lightning/${pr}`);
  },

  withdraw: async ({ cookies, fetch, request }) => {
    let error;

    let {
      callback,
      amount,
      username,
      currency,
      minWithdrawable,
      maxWithdrawable,
      k1,
    } = await fd(request);

    minWithdrawable = Math.round(minWithdrawable / 1000);
    maxWithdrawable = Math.round(maxWithdrawable / 1000);

    if (amount < minWithdrawable)
      error = `Amount must be at least ${minWithdrawable} sats`;
    if (amount > maxWithdrawable)
      error = `Amount must be at most ${maxWithdrawable} sats`;
    if (error) return fail(400, { error });

    let invoice = { amount, type: "lightning" };
    let user = { username, currency };

    let { text: pr } = await post("/invoice", { invoice, user }, auth(cookies));

    let c = callback.includes("?") ? "&" : "?";
    await fetch(`${callback}${c}k1=${k1}&pr=${pr}`).then((r) => r.json());

    redirect(307, `/ln/withdrawal/sent`);
  },
};