import { prisma } from "@/lib/api/db";
import createFolder from "@/lib/api/storage/createFolder";
import { JSDOM } from "jsdom";

const MAX_LINKS_PER_USER = Number(process.env.MAX_LINKS_PER_USER) || 30000;

export default async function importFromHTMLFile(
  userId: number,
  rawData: string
) {
  const dom = new JSDOM(rawData);
  const document = dom.window.document;

  const bookmarks = document.querySelectorAll("A");
  const totalImports = bookmarks.length;

  const numberOfLinksTheUserHas = await prisma.link.count({
    where: {
      collection: {
        ownerId: userId,
      },
    },
  });

  if (totalImports + numberOfLinksTheUserHas > MAX_LINKS_PER_USER)
    return {
      response: `Error: Each user can only have a maximum of ${MAX_LINKS_PER_USER} Links.`,
      status: 400,
    };

  const folders = document.querySelectorAll("H3");
  let unorganizedCollectionId: number | null = null;

  if (folders.length === 0) {
    const unorganizedCollection = await prisma.collection.findFirst({
      where: {
        name: "Imported",
        ownerId: userId,
      },
    });

    if (!unorganizedCollection) {
      const newUnorganizedCollection = await prisma.collection.create({
        data: {
          name: "Imported",
          description:
            "Automatically created collection for imported bookmarks.",
          ownerId: userId,
        },
      });
      unorganizedCollectionId = newUnorganizedCollection.id;
    } else {
      unorganizedCollectionId = unorganizedCollection.id;
    }

    createFolder({ filePath: `archives/${unorganizedCollectionId}` });
  }

  await prisma
    .$transaction(
      async () => {
        if (unorganizedCollectionId) {
          // @ts-ignore
          for (const bookmark of bookmarks) {
            createBookmark(userId, bookmark, unorganizedCollectionId);
          }
        } else {
          // @ts-ignore
          for (const folder of folders) {
            const findCollection = await prisma.user.findUnique({
              where: {
                id: userId,
              },
              select: {
                collections: {
                  where: {
                    name: folder.textContent.trim(),
                  },
                },
              },
            });

            const checkIfCollectionExists = findCollection?.collections[0];

            let collectionId = findCollection?.collections[0]?.id;

            if (!checkIfCollectionExists || !collectionId) {
              const newCollection = await prisma.collection.create({
                data: {
                  name: folder.textContent.trim(),
                  description: "",
                  color: "#0ea5e9",
                  isPublic: false,
                  ownerId: userId,
                },
              });

              createFolder({ filePath: `archives/${newCollection.id}` });

              collectionId = newCollection.id;
            }

            createFolder({ filePath: `archives/${collectionId}` });

            const bookmarks = folder.nextElementSibling.querySelectorAll("A");
            for (const bookmark of bookmarks) {
              createBookmark(userId, bookmark, collectionId);
            }
          }
        }
      },
      { timeout: 30000 }
    )
    .catch((err) => console.log(err));

  return { response: "Success.", status: 200 };
}

const createBookmark = async (
  userId: number,
  bookmark: any,
  collectionId: number
) => {
  // Move up to the parent node (<DT>) and then find the next sibling
  let parentDT = bookmark.parentNode;
  let nextSibling = parentDT ? parentDT.nextSibling : null;
  let description = "";

  // Loop through siblings to skip any potential text nodes or whitespace
  while (nextSibling && nextSibling.nodeType !== 1) {
    nextSibling = nextSibling.nextSibling;
  }

  // Check if the next sibling element is a <DD> tag and use its content as the description
  if (nextSibling && nextSibling.tagName === "DD") {
    description = nextSibling.textContent.trim();
  }

  await prisma.link.create({
    data: {
      name: bookmark.textContent.trim(),
      url: bookmark.getAttribute("HREF"),
      tags: bookmark.getAttribute("TAGS")
        ? {
            connectOrCreate: bookmark
              .getAttribute("TAGS")
              .split(",")
              .map((tag: string) =>
                tag
                  ? {
                      where: {
                        name_ownerId: {
                          name: tag.trim(),
                          ownerId: userId,
                        },
                      },
                      create: {
                        name: tag.trim(),
                        owner: {
                          connect: {
                            id: userId,
                          },
                        },
                      },
                    }
                  : undefined
              ),
          }
        : undefined,
      description,
      collectionId,
    },
  });
};