import { logUtil } from "../../utils/logger";

/**
 * Publish a .gem file to RubyGems.org.
 *
 * Uses the multipart form upload API:
 *   POST https://rubygems.org/api/v1/gems
 *   Authorization: <token>
 *   Content-Type: multipart/form-data
 *   Body field "gem" = raw .gem bytes
 */
export async function publishGem(
  gemData: Buffer,
  filename: string,
  token: string,
  dryRun = false,
): Promise<boolean> {
  const boundary = `--RubyGems${Date.now()}${Math.random().toString(36).slice(2)}`;

  if (dryRun) {
    logUtil.log("[rubygems] DRY RUN — skipping upload");
    logUtil.log(
      `[rubygems] would publish ${filename} (${gemData.length} bytes)`,
    );
    logUtil.log("[rubygems] POST https://rubygems.org/api/v1/gems");
    logUtil.log("[rubygems] Authorization: <redacted>");
    logUtil.log(
      `[rubygems] Content-Type: multipart/form-data; boundary=${boundary}`,
    );
    return true;
  }

  const encoder = new TextEncoder();
  const crlf = encoder.encode("\r\n");

  const parts: Uint8Array[] = [];

  // File field: gem=<filename>
  parts.push(encoder.encode(`--${boundary}\r\n`));
  parts.push(
    encoder.encode(
      `Content-Disposition: form-data; name="gem"; filename="${filename}"\r\n`,
    ),
  );
  parts.push(encoder.encode("Content-Type: application/octet-stream\r\n\r\n"));
  parts.push(new Uint8Array(gemData));
  parts.push(crlf);

  // End boundary
  parts.push(encoder.encode(`--${boundary}--\r\n`));

  const body = new Uint8Array(parts.reduce((acc, p) => acc + p.length, 0));
  let offset = 0;
  for (const p of parts) {
    body.set(p, offset);
    offset += p.length;
  }

  try {
    const res = await fetch("https://rubygems.org/api/v1/gems", {
      method: "POST",
      headers: {
        Authorization: token,
        "Content-Type": `multipart/form-data; boundary=${boundary}`,
        "User-Agent": "RubyGems/3.5.0",
      },
      body,
    });

    if (res.ok) {
      logUtil.log(`[rubygems] Published ${filename}`);
      return true;
    }

    const text = await res.text();
    logUtil.log(
      `[rubygems] Publish failed (${res.status}): ${text.slice(0, 300)}`,
    );
    return false;
  } catch (e) {
    logUtil.log(
      `[rubygems] Publish error: ${e instanceof Error ? e.message : String(e)}`,
    );
    return false;
  }
}