import { dispatch } from "@plugos/plugos-syscall/event";
import { findNodeOfType } from "@silverbulletmd/common/tree";
import { flashNotification } from "@silverbulletmd/plugos-silverbullet-syscall/editor";
import { parseMarkdown } from "@silverbulletmd/plugos-silverbullet-syscall/markdown";
import {
  deletePage,
  listPages,
  readPage,
  writePage,
} from "@silverbulletmd/plugos-silverbullet-syscall/space";
import {
  invokeFunction,
  reloadPlugs,
} from "@silverbulletmd/plugos-silverbullet-syscall/system";
import YAML from "yaml";

async function listPlugs(): Promise<string[]> {
  let unfilteredPages = await listPages(true);
  return unfilteredPages
    .filter((p) => p.name.startsWith("_plug/"))
    .map((p) => p.name.substring("_plug/".length));
}

export async function updatePlugsCommand() {
  flashNotification("Updating plugs...");
  await invokeFunction("server", "updatePlugs");
  flashNotification("And... done!");
  await reloadPlugs();
}

export async function updatePlugs() {
  let { text: plugPageText } = await readPage("PLUGS");

  let tree = await parseMarkdown(plugPageText);

  let codeTextNode = findNodeOfType(tree, "CodeText");
  if (!codeTextNode) {
    console.error("Could not find yaml block in PLUGS");
    return;
  }
  let plugYaml = codeTextNode.children![0].text;
  let plugList = YAML.parse(plugYaml!);
  console.log("Plug YAML", plugList);
  let allPlugNames: string[] = [];
  for (let plugUri of plugList) {
    let [protocol, ...rest] = plugUri.split(":");
    let manifests = await dispatch(`get-plug:${protocol}`, rest.join(":"));
    if (manifests.length === 0) {
      console.error("Could not resolve plug", plugUri);
    }
    // console.log("Got manifests", plugUri, protocol, manifests);
    let manifest = manifests[0];
    allPlugNames.push(manifest.name);
    // console.log("Writing", `_plug/${manifest.name}`);
    await writePage(
      `_plug/${manifest.name}`,
      JSON.stringify(manifest, null, 2)
    );
  }

  // And delete extra ones
  for (let existingPlug of await listPlugs()) {
    if (!allPlugNames.includes(existingPlug)) {
      console.log("Removing plug", existingPlug);
      await deletePage(`_plug/${existingPlug}`);
    }
  }
  await reloadPlugs();
}