/*
Copyright (c) 2025 SharpMars

Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE
FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
import { Client, simpleFetchHandler } from "@atcute/client";
import type { RecordKey } from "@atcute/lexicons";
import { createResource, For, Show, Suspense } from "solid-js";
import type { PubLeafletComment, PubLeafletRichtextFacet } from "@atcute/leaflet";
import { formatDistance } from "date-fns";

export function LeafletComments(props: { rkey: RecordKey }) {
  const leafletUrl = "https://sharpmars.leaflet.pub/";
  const atUriPrefix = "at://did:plc:irx36xprktslecsbopbwnh5w/pub.leaflet.document/";

  const splitTextByFacet = (text: string, facets?: PubLeafletRichtextFacet.Main[]) => {
    if (!facets || facets.length == 0) return text;

    const sortedFacets = facets.toSorted((a, b) => a.index.byteStart - b.index.byteStart);
    const encoder = new TextEncoder();
    const decoder = new TextDecoder();
    const encodedText = encoder.encode(text);

    const indexSet = new Set<number>();
    indexSet.add(0);
    indexSet.add(encodedText.length);

    for (const facet of sortedFacets) {
      indexSet.add(facet.index.byteStart);
      indexSet.add(facet.index.byteEnd);
    }

    const indexes = [...indexSet].sort((a, b) => a - b);

    const ranges: { start: number; end: number }[] = [];

    for (let i = 0; i < indexSet.size - 1; i++) {
      ranges.push({ start: indexes[i], end: indexes[i + 1] });
    }

    const segments = ranges.map((range) => {
      const segmentFacets = sortedFacets
        .filter((val) => val.index.byteStart >= range.start && val.index.byteEnd <= range.end)
        .flatMap((val) => val.features)
        .map((val) => val.$type);

      return (
        <span
          classList={{
            "line-through decoration-[hsl(29,100%,65%)] decoration-1.5": segmentFacets.includes(
              "pub.leaflet.richtext.facet#strikethrough"
            ),
            italic: segmentFacets.includes("pub.leaflet.richtext.facet#italic"),
            "font-bold": segmentFacets.includes("pub.leaflet.richtext.facet#bold"),
          }}
        >
          {decoder.decode(encodedText.subarray(range.start, range.end))}
        </span>
      );
    });

    return segments;
  };

  const [comments] = createResource(async () => {
    const atUri = atUriPrefix + props.rkey;

    let cursor = null;
    const records = [];

    do {
      const res = await (
        await fetch(
          `https://constellation.microcosm.blue/xrpc/blue.microcosm.links.getBacklinks?subject=${atUri}&source=pub.leaflet.comment:subject&limit=100`
        )
      ).json();

      records.push(...res.records);
      cursor = res.cursor;
    } while (cursor);

    const slingshot = new Client({ handler: simpleFetchHandler({ service: "https://slingshot.microcosm.blue" }) });

    const comments: {
      handle: string;
      createdAt: string;
      text: ReturnType<typeof splitTextByFacet>;
      attachment: boolean;
    }[] = [];

    for (const record of records) {
      const commentRes = await slingshot.get("com.atproto.repo.getRecord", {
        params: { rkey: record.rkey, collection: record.collection, repo: record.did },
        headers: [["Accept", "application/json"]],
      });

      const handleRes = await slingshot.get("com.bad-example.identity.resolveMiniDoc", {
        params: { identifier: record.did },
      });

      const handle = handleRes.ok ? handleRes.data.handle : record.did;

      if (commentRes.ok) {
        const comment = commentRes.data.value as PubLeafletComment.Main;
        comments.push({
          handle: handle ? handle : record.did,
          createdAt: comment.createdAt,
          text: splitTextByFacet(comment.plaintext, comment.facets),
          attachment: !!comment.attachment,
        });
      }
    }

    return comments;
  });

  return (
    <div class="flex gap-3 flex-col max-w-768px w-full">
      <hr class="text-[hsl(29,100%,65%)]" />
      <p class="text-6 font-700">Comments</p>
      <p>
        To comment or see them in their original form check out{" "}
        <a
          class="underline text-[hsl(29,100%,65%)] after:content-['↗'] hover:brightness-120 transition-all"
          href={leafletUrl + props.rkey}
        >
          leaflet.pub
        </a>
      </p>
      <Suspense fallback={"Loading..."}>
        <For each={comments()}>
          {(comment, i) => (
            <div class="flex flex-col gap-1">
              <hr class="m-t-1 m-b-1 text-neutral-700" />
              <div class="flex justify-between items-center">
                <p>{comment.handle}</p>
                <p>{formatDistance(new Date(comment.createdAt), new Date(), { addSuffix: true })}</p>
              </div>
              <Show when={comment.attachment}>
                <div class="flex justify-center w-full">
                  <div class="b-1 b-neutral-700 p-1 flex justify-center items-center max-w-98% w-full">
                    <p>
                      Check quote on{" "}
                      <a
                        class="underline text-[hsl(29,100%,65%)] after:content-['↗'] hover:brightness-120 transition-all"
                        href={leafletUrl + props.rkey}
                      >
                        leaflet.pub
                      </a>
                    </p>
                  </div>
                </div>
              </Show>
              <p class="m-x-1%">{comment.text}</p>
            </div>
          )}
        </For>
      </Suspense>
    </div>
  );
}