import { redirect } from "@remix-run/node";
import {
  unstable_createFileUploadHandler,
  unstable_parseMultipartFormData,
  json,
} from "@remix-run/node";
import {
  useLoaderData,
  Form,
  useActionData,
  Link,
  useTransition,
} from "@remix-run/react";
import { useEffect, useState } from "react";
import Overlay from "~/components/Overlay";
import { ThreadReply } from "~/components/ThreadReply";
import prisma from "~/utils/db.server";
import { useNavigate } from "@remix-run/react";
import { useRevalidator } from "@remix-run/react";

export async function action({ request, params }) {
  const threadId = params.threadId;
  if (!parseInt(threadId)) throw new Error("Bad route parameter");

  const clonedData = request.clone();
  const formData = await clonedData.formData();
  const post = formData.get("post");
  const replying = formData.get("replying");

  const fileUploadHandler = unstable_createFileUploadHandler({
    directory: "./public/uploads/",
    maxPartSize: 500000,
    file: ({ filename }) => {
      if (formData.get("anonymize"))
        return `${require("crypto").randomBytes(16).toString("hex")}.${
          filename.split(".").slice(-1)[0]
        }`;

      return filename;
    },
    filter: (data) => {
      const fileTypes = ["jpeg", "jpg", "png", "gif"];
      // if sent file is not an image, don't handle it
      if (!fileTypes.includes(data.contentType.split("/")[1])) return false;

      return true;
    },
  });

  const errors = {};

  let imageName;
  let multiPartformdata;
  try {
    multiPartformdata = await unstable_parseMultipartFormData(
      request,
      fileUploadHandler
    );
    multiPartformdata.get("image") !== null
      ? (imageName = multiPartformdata.get("image").name)
      : (imageName = null);
  } catch (err) {
    errors.image = "Image size too big";
  }
  if (typeof post !== "string" || post.length > 50 || post.length < 3) {
    errors.post = "Post too long or short";
  }

  if (replying !== "") {
    let currentThreadreplyids = [];
    const currentThread = await prisma.thread.findUnique({
      where: {
        id: parseInt(threadId),
      },
      include: {
        posts: true,
      },
    });
    currentThread.posts.map((post) => currentThreadreplyids.push(post.id));

    if (
      typeof replying !== "string" ||
      !parseInt(replying) ||
      !currentThreadreplyids.includes(parseInt(replying))
    ) {
      errors.replying = "bad reply id";
    }
  }

  if (Object.keys(errors).length) {
    return json(errors, { status: 422 });
  }

  const createPost = await prisma.post.create({
    data: {
      comment: post,
      imageName: imageName,
      replyingTo: replying ? parseInt(replying) : null,
      postId: parseInt(threadId),
    },
  });

  return createPost;
}

export async function loader({ params }) {
  const threadId = params.threadId;
  if (!parseInt(threadId)) throw new Error("Bad route parameter");

  const thread = await prisma.thread.findUnique({
    where: {
      id: parseInt(threadId),
    },
    include: {
      posts: {
        include: {
          replies: true,
        },
      },
    },
  });

  if (!thread) {
    throw new Error("Thread not found");
  }

  return thread;
}

export default function Thread() {
  const data = useLoaderData();
  const actionData = useActionData();
  const transition = useTransition();
  const [replying, setReplying] = useState();
  const revalidator = useRevalidator();

  useEffect(() => {
    const timer = setInterval(() => {
      revalidator.revalidate();
    }, 5000);

    return () => clearInterval(timer);
  }, []);

  return (
    <Overlay>
      <div className="fixed top-0 right-0 m-4 flex flex-col rounded border bg-ctp-crust p-2">
        <div className="space-x-4">
          <Link
            onClick={(event) => {
              event.preventDefault();
              document.getElementById(`bottom`).scrollIntoView(true);
            }}
            to={`/threads/${data.id}#bottom`}
          >
            Bottom
          </Link>
          <Link
            onClick={(event) => {
              event.preventDefault();
              document.getElementById(`top`).scrollIntoView(true);
            }}
            to={`/threads/${data.id}#top`}
          >
            Top
          </Link>
        </div>
        <p>{revalidator.state === "loading" ? "Updating..." : ""}</p>
      </div>
      <div id="top" className="flex flex-col">
        <div
          id="OP"
          className="flex w-fit flex-col rounded border-4 bg-ctp-crust p-4 shadow-lg"
        >
          <span>
            <strong>{data.title}</strong> Post id: <strong>{data.id}</strong>{" "}
            Created at:{" "}
            <strong>{new Date(data.createdAt).toLocaleTimeString()}</strong>{" "}
            Reply count: <strong>{data.posts.length}</strong>
          </span>
          <br />
          <div className="flex flex-col">
            <img
              className="max-h-96 w-60"
              src={`/uploads/${data.imageName}`}
              alt="post image"
            />
            <Link
              className=" text-xs text-ctp-surface0"
              to={`/uploads/${data.imageName}`}
              target="_blank"
              referrerPolicy="no-referrer"
            >
              Click to show full image
            </Link>
          </div>
          <p className="">{data.post}</p>
        </div>
        <ul className="m-8 ">
          {data.posts.map((post) => (
            <ThreadReply
              key={post.id}
              setReplying={setReplying}
              index={false}
              post={post}
            />
          ))}
        </ul>
      </div>
      <Form
        id="bottom"
        className="flex flex-col items-center space-y-4"
        method="post"
        encType="multipart/form-data"
      >
        <label className="flex flex-col" htmlFor="text-input">
          {replying ? (
            <p className="text-ctp-black text-center font-semibold">
              Replying to reply id: {replying}{" "}
              <button
                className="text-ctp-sky hover:text-ctp-teal hover:underline"
                onClick={() => setReplying("")}
              >
                Reset
              </button>
            </p>
          ) : (
            ""
          )}
          <span className="text-center font-semibold text-ctp-subtext0">
            Post
          </span>{" "}
          <textarea
            className=" m-1 rounded bg-ctp-surface0 p-1 shadow shadow-ctp-overlay0"
            required
            minLength={3}
            name="post"
            type="text"
          />
          {actionData ? <p>{actionData.post}</p> : ""}
        </label>
        <label className="flex flex-col items-center" htmlFor="image-upload">
          <span className="text-center font-semibold text-ctp-subtext0">
            Image (500kbps max)
          </span>
          <input
            className="m-0 block w-full rounded bg-ctp-surface0 bg-clip-padding px-3 py-1.5 text-base font-semibold text-ctp-text transition ease-in-out"
            accept="image/*"
            type="file"
            id="image-upload"
            name="image"
          />
          <label htmlFor="anon">
            <span>Anonymize filename </span>
            <input type="checkbox" name="anonymize" id="anon-check" />
          </label>
          <p className="text-ctp-red">{actionData?.image}</p>
        </label>
        <details className="flex items-center justify-center duration-300">
          <summary className="cursor-pointer text-center font-semibold text-ctp-subtext0">
            Manual replying (needed when JS is disabled)
          </summary>
          <div class="flex flex-col items-center justify-center">
            <input
              className="m-1 rounded bg-ctp-surface0 p-1 shadow shadow-ctp-overlay0"
              placeholder="Enter a Reply ID"
              type="number"
              name="replying"
              value={replying}
            />
          </div>
        </details>
        <p className="text-ctp-red">{actionData?.replying}</p>

        <button
          className="rounded-full bg-ctp-crust px-4 py-2 shadow"
          type="submit"
        >
          {transition.state === "submitting" ? "Submitting..." : "Submit"}
        </button>
      </Form>
    </Overlay>
  );
}

export function ErrorBoundary({ error }) {
  return (
    <Overlay>
      <div className="w-full rounded bg-ctp-red p-4 text-white">
        <h1 className="text-2xl">{error.message}</h1>
        <code>{error.stack}</code>
      </div>
    </Overlay>
  );
}