import YAML = require("yamljs");
import { getNoteLink } from "../../utils/link";

export { renderTemplatePreview };

async function renderTemplatePreview(
  templateName: string,
  inputItems?: Zotero.Item[],
): Promise<string> {
  let html: string = "<p>Preview rendering failed</p>";
  if (!inputItems) {
    inputItems = ZoteroPane.getSelectedItems();
  }
  if (templateName.toLowerCase().startsWith("[text]")) {
    html = await addon.api.template.runTextTemplate(templateName, {
      dryRun: true,
    });
  } else if (templateName.toLowerCase().startsWith("[item]")) {
    const data = inputItems?.map((item) => item.id);
    html = await addon.api.template.runItemTemplate(templateName, {
      itemIds: data,
      dryRun: true,
    });
  } else if (templateName.includes("ExportMDFileName")) {
    // noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      html = await addon.api.template.runTemplate(
        templateName,
        "noteItem",
        [data],
        {
          dryRun: true,
        },
      );
    }
  } else if (templateName.includes("ExportMDFileHeader")) {
    // noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      const raw = await addon.api.template.runTemplate(
        templateName,
        "noteItem",
        [data],
        {
          dryRun: true,
        },
      );
      const header = Object.assign({}, JSON.parse(raw), {
        version: data.version,
        libraryID: data.libraryID,
        itemKey: data.key,
      });
      html = `<pre>${YAML.stringify(header, 10)}</pre>`;
    }
  } else if (templateName.includes("ExportMDFileContent")) {
    // noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      html = `<pre>${await addon.api.convert.note2md(
        data,
        Zotero.getTempDirectory().path,
        { withYAMLHeader: false, skipSavingImages: true, keepNoteLink: true },
      )}</pre>`;
    }
  } else if (templateName.includes("QuickInsert")) {
    // link, linkText, subNoteItem, noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      const link = getNoteLink(data);
      const linkText = data.getNoteTitle().trim() || link;
      const subNoteItem = data;
      const noteItem = new Zotero.Item("note");
      html = await addon.api.template.runTemplate(
        templateName,
        "link, linkText, subNoteItem, noteItem",
        [link, linkText, subNoteItem, noteItem],
        {
          dryRun: true,
        },
      );
    }
  } else if (templateName.includes("QuickBackLink")) {
    // link, linkText, subNoteItem, noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      const link = getNoteLink(data);
      const noteItem = new Zotero.Item("note");
      const linkText = noteItem.getNoteTitle().trim() || "Workspace Note";
      const subNoteItem = data;
      html = await addon.api.template.runTemplate(
        templateName,
        "link, linkText, subNoteItem, noteItem",
        [link, linkText, subNoteItem, noteItem],
        {
          dryRun: true,
        },
      );
    }
  } else if (templateName.includes("QuickImport")) {
    // link, noteItem
    const data = inputItems?.find((item) => item.isNote());
    if (!data) {
      html = "<p>No note item selected</p>";
    } else {
      const link = getNoteLink(data);
      const noteItem = new Zotero.Item("note");
      html = await addon.api.template.runTemplate(
        templateName,
        "link, noteItem",
        [link, noteItem],
        {
          dryRun: true,
        },
      );
    }
  } else if (templateName.includes("QuickNote")) {
    // annotationItem, topItem, noteItem
    html = "<p>Preview not available for QuickNote</p>";
  } else {
    html = `<p>Preview not available for template ${templateName}</p>`;
  }
  return html;
}