function fileHasTag(file, tag) {
  const cache = app.metadataCache.getFileCache(file);
  const allTags = (cache?.frontmatter?.tags ?? []).concat(
    cache?.tags?.map((t) => (t.tag[0] === "#" ? t.tag.slice(1) : t.tag)),
  );
  return allTags.some((t) => t === tag || t?.startsWith(`${tag}/`));
}

function fileInParentWithTag(file, tag) {
  return app.vault
    .getMarkdownFiles()
    .filter(
      (mdFile) =>
        file.path.startsWith(mdFile.parent.path) && fileHasTag(mdFile, tag),
    )?.[0];
}

function campaignData(file) {
  const campaignFile =
    fileInParentWithTag(file, "ttrpg/campaign") ||
    app.vault.getFileByPath("index.md");
  const data = {};
  console.log("campaign file", campaignFile);
  if (campaignFile) {
    const cache = app.metadataCache.getFileCache(campaignFile);
    const fm = cache?.frontmatter;
    const settingFile = frontmatterLinksToTFiles(campaignFile, "setting")?.[0];
    data.players = fm?.players;
    data.gm = fm?.gm;
    data.title = fm?.title || campaignFile.basename;
    data.system = fm?.system;
    data.setting = fm?.setting;
    data.settingFile = settingFile;
    data.file = campaignFile;
    data.link = app.fileManager.generateMarkdownLink(
      campaignFile,
      file.path,
      null,
      data.title,
    );
  }
  return data;
}

function frontmatterLinksToTFiles(sourceFile, property) {
  const links = app.metadataCache.getFileCache(sourceFile)?.frontmatterLinks;
  if (links) {
    return app.metadataCache
      .getFileCache(sourceFile)
      ?.frontmatterLinks?.filter((l) => l.key.startsWith(property))
      ?.map((l) =>
        app.metadataCache.getFirstLinkpathDest(l.link, sourceFile.path),
      )
      ?.filter((f) => f);
  } else {
    return [];
  }
}

function settingData(file) {
  const settingFile =
    fileInParentWithTag(file, "ttrpg/setting") ||
    campaignData(file)?.settingFile ||
    app.vault.getFileByPath("index.md");
  const data = {};
  if (settingFile) {
    const cache = app.metadataCache.getFileCache(settingFile);
    const fm = cache?.frontmatter;
    data.title = fm?.title || campaignFile.basename;
    data.file = settingFile;
    data.calendar = fm?.["fc-calendar"];
    data.link = app.fileManager.generateMarkdownLink(
      settingFile,
      file.path,
      null,
      data.title,
    );
  }
  return data;
}

module.exports = {
  campaignData: campaignData,
  settingData: settingData,
};