import * as Constants from "~/node_common/constants";
import * as Utilities from "~/node_common/utilities";
import * as Data from "~/node_common/data";

const generateLayout = (items) => {
  if (!items) {
    return [];
  }

  if (!items.length) {
    return [];
  }

  return items.map((item, i) => {
    var y = Math.ceil(Math.random() * 4) + 1;

    return {
      x: (i * 2) % 10,
      y: 0,
      w: 2,
      h: 2,
      minW: 2,
      minH: 2,
      // NOTE(jim): Library quirk thats required.
      i: i.toString(),
    };
  });
};

export default async (req, res) => {
  const id = Utilities.getIdFromCookie(req);
  if (!id) {
    return res
      .status(403)
      .send({ decorator: "SERVER_ADD_TO_SLATE_USER_NOT_FOUND", error: true });
  }

  const user = await Data.getUserById({
    id,
  });

  if (!user) {
    return res.status(404).send({
      decorator: "SERVER_ADD_TO_SLATE_USER_NOT_FOUND",
      error: true,
    });
  }

  if (user.error) {
    return res.status(500).send({
      decorator: "SERVER_ADD_TO_SLATE_USER_NOT_FOUND",
      error: true,
    });
  }

  const slate = await Data.getSlateById({ id: req.body.slate.id });

  if (!slate) {
    return res.status(404).send({
      decorator: "SERVER_ADD_TO_SLATE_SLATE_NOT_FOUND",
      error: true,
    });
  }

  if (slate.error) {
    return res.status(500).send({
      decorator: "SERVER_ADD_TO_SLATE_SLATE_NOT_FOUND",
      error: true,
    });
  }

  let newObjects = [];
  if (Array.isArray(req.body.data)) {
    newObjects = [...req.body.data];
  } else {
    newObjects = [req.body.data];
  }

  let slateURLs = slate.data.objects.map((file) => file.url);
  let newIPFSs = [];
  let addlObjects = newObjects
    .filter((each) => {
      if (
        slateURLs.includes(
          `${Constants.IPFS_GATEWAY_URL}/${each.ipfs.replace("/ipfs/", "")}`
        ) ||
        newIPFSs.includes(each.ipfs)
      ) {
        return false;
      }
      newIPFSs.push(each.ipfs);
      return true;
    })
    .map((each) => {
      let cid = each.ipfs.replace("/ipfs/", "");
      return {
        id: each.id,
        ownerId: user.id,
        name: each.name,
        title: each.title,
        type: each.type,
        url: `${Constants.IPFS_GATEWAY_URL}/${cid}`,
      };
    });

  const objects = [...slate.data.objects, ...addlObjects];

  // TODO(jim): Preserve layouts when adding.
  let layouts = { lg: generateLayout(objects) };

  const update = await Data.updateSlateById({
    id: slate.id,
    updated_at: new Date(),
    data: {
      ...slate.data,
      layouts,
      objects,
    },
  });

  if (!update) {
    return res.status(500).send({
      decorator: "SERVER_ADD_TO_SLATE_ERROR",
      error: true,
    });
  }

  if (update.error) {
    return res.status(500).send({
      decorator: "SERVER_ADD_TO_SLATE_ERROR",
      error: true,
    });
  }

  return res.status(200).send({
    decorator: "SERVER_SLATE_ADD_TO_SLATE",
    added: addlObjects.length,
    skipped: newObjects.length - addlObjects.length,
    slate,
  });
};