import { readFile, writeFile } from "fs/promises";
import {
  getIntegrationDocumentationUrl,
  integrationDefs,
  integrationKinds,
} from "../packages/definitions/src/integration";

const FILE = "docs/README.md";
const MAX_COLUMNS_PER_ROW = 7;

async function updateIntegrationList() {
  // Read current README content
  const content = await readFile(FILE, "utf8");

  // Define markers
  const startMarker = "<!-- AUTO_GENERATE_INTEGRATION_LIST_START -->";
  const endMarker = "<!-- AUTO_GENERATE_INTEGRATION_LIST_END -->";

  // Find the section to replace
  const startIndex = content.indexOf(startMarker);
  const endIndex = content.indexOf(endMarker);

  if (startIndex === -1 || endIndex === -1) {
    throw new Error("Could not find markers in README.md");
  }

  // Generate the new integration list
  const integrations = integrationKinds
    .filter((kind) => kind !== "mock")
    .map((kind) => ({
      ...integrationDefs[kind],
      documentationUrl: getIntegrationDocumentationUrl(kind),
    }))
    .toSorted((a, b) => a.name.localeCompare(b.name));
  const tableRows: string[] = [];
  let currentRow: string[] = [];

  integrations.forEach((integration) => {
    const cellBody = `
  <img src="${integration.iconUrl}" alt="${integration.name}" width="90" height="90" />
  <br/>
  <p align="center">${integration.name.replaceAll(" ", "<br/>")}</p>
`;
    let cellContent = `<div>${cellBody}</div>`;
    if (integration.documentationUrl !== null) {
      cellContent = `<a href="${integration.documentationUrl}" target="_blank" rel="noreferrer noopener">${cellBody}</a>`;
    }

    currentRow.push(`<td align="center">
${cellContent}
</td>`);

    if (currentRow.length === MAX_COLUMNS_PER_ROW) {
      tableRows.push(`<tr>${currentRow.join("\n")}</tr>`);
      currentRow = [];
    }
  });

  // Add remaining items if any
  if (currentRow.length > 0) {
    tableRows.push(`<tr>${currentRow.join("\n")}</tr>`);
  }

  // Create the new content
  const newSection = `${startMarker}

<div align="center">
<table>
<tbody>
${tableRows.join("\n")}
</tbody>
</table>
</div>

${endMarker}`;

  // Replace the old section with the new one
  const newContent = content.slice(0, startIndex) + newSection + content.slice(endIndex + endMarker.length);

  // Write the updated content back to the file
  await writeFile(FILE, newContent, "utf8");
}

updateIntegrationList().catch((error: unknown) => {
  console.error(error);
  process.exitCode = 1;
});