import { Page, chromium, devices } from "playwright";
import { prisma } from "@/lib/api/db";
import createFile from "@/lib/api/storage/createFile";

export default async function archive(linkId: number, url: string) {
  const browser = await chromium.launch();
  const context = await browser.newContext(devices["Desktop Chrome"]);
  const page = await context.newPage();

  try {
    await page.goto(url, { waitUntil: "domcontentloaded" });

    await autoScroll(page);

    const linkExists = await prisma.link.findUnique({
      where: {
        id: linkId,
      },
    });

    if (linkExists) {
      const pdf = await page.pdf({
        width: "1366px",
        height: "1931px",
        printBackground: true,
        margin: { top: "15px", bottom: "15px" },
      });
      const screenshot = await page.screenshot({
        fullPage: true,
      });

      createFile({
        data: screenshot,
        filePath: `archives/${linkExists.collectionId}/${linkId}.png`,
      });

      createFile({
        data: pdf,
        filePath: `archives/${linkExists.collectionId}/${linkId}.pdf`,
      });
    }

    await browser.close();
  } catch (err) {
    console.log(err);
    await browser.close();
  }
}

const autoScroll = async (page: Page) => {
  await page.evaluate(async () => {
    const timeoutPromise = new Promise<void>((_, reject) => {
      setTimeout(() => {
        reject(new Error("Auto scroll took too long (more than 20 seconds)."));
      }, 20000);
    });

    const scrollingPromise = new Promise<void>((resolve) => {
      let totalHeight = 0;
      let distance = 100;
      let scrollDown = setInterval(() => {
        let scrollHeight = document.body.scrollHeight;
        window.scrollBy(0, distance);
        totalHeight += distance;
        if (totalHeight >= scrollHeight) {
          clearInterval(scrollDown);
          window.scroll(0, 0);
          resolve();
        }
      }, 100);
    });

    await Promise.race([scrollingPromise, timeoutPromise]);
  });
};