const PAT = process.env.FIGMA_PAT!;
const FILE_KEY = process.env.FIGMA_FILE_KEY!;

// GET /v1/images/:file_key?ids=X,Y&format=png&scale=2
// Supported formats: png, svg, jpg, pdf
// Scale: 0.01 to 4 (SVG always exports at 1x)
// Max image size: 32 megapixels (larger images are auto-scaled down)
async function exportImages(
  nodeIds: string[],
  format: 'png' | 'svg' | 'jpg' | 'pdf' = 'png',
  scale = 2
): Promise<Record<string, string | null>> {
  const params = new URLSearchParams({
    ids: nodeIds.join(','),
    format,
    scale: String(format === 'svg' ? 1 : scale), // SVG is always 1x
  });

  const res = await fetch(
    `https://api.figma.com/v1/images/${FILE_KEY}?${params}`,
    { headers: { 'X-Figma-Token': PAT } }
  );

  if (!res.ok) throw new Error(`Image export failed: ${res.status}`);
  const data = await res.json();

  // data.images: { "nodeId": "https://..." | null }
  // null means the node failed to render (invisible, 0% opacity, or invalid ID)
  // URLs expire after 30 days
  return data.images;
}

import { writeFileSync, mkdirSync } from 'fs';
import { join } from 'path';

async function downloadAssets(
  nodeIds: string[],
  outputDir: string,
  format: 'png' | 'svg' = 'svg'
) {
  mkdirSync(outputDir, { recursive: true });

  const imageUrls = await exportImages(nodeIds, format);
  const results: { nodeId: string; path: string; success: boolean }[] = [];

  for (const [nodeId, url] of Object.entries(imageUrls)) {
    if (!url) {
      console.warn(`Node ${nodeId}: render returned null (invisible or invalid)`);
      results.push({ nodeId, path: '', success: false });
      continue;
    }

    const res = await fetch(url);
    const buffer = Buffer.from(await res.arrayBuffer());
    const filename = `${nodeId.replace(':', '-')}.${format}`;
    const filepath = join(outputDir, filename);
    writeFileSync(filepath, buffer);
    results.push({ nodeId, path: filepath, success: true });
  }

  return results;
}

// Find all COMPONENT children in an "Icons" frame, then export each as SVG
async function exportIconsFromFrame(frameNodeId: string) {
  // Fetch the frame and its children
  const res = await fetch(
    `https://api.figma.com/v1/files/${FILE_KEY}/nodes?ids=${frameNodeId}`,
    { headers: { 'X-Figma-Token': PAT } }
  );
  const data = await res.json();
  const frame = data.nodes[frameNodeId]?.document;

  if (!frame?.children) throw new Error('Frame has no children');

  // Collect component node IDs
  const iconIds = frame.children
    .filter((n: any) => n.type === 'COMPONENT' || n.type === 'INSTANCE')
    .map((n: any) => n.id);

  console.log(`Found ${iconIds.length} icons to export`);

  // Export as SVG (batch -- up to 100 IDs per request)
  const batchSize = 100;
  for (let i = 0; i < iconIds.length; i += batchSize) {
    const batch = iconIds.slice(i, i + batchSize);
    await downloadAssets(batch, './assets/icons', 'svg');
  }
}

// Use component metadata for better filenames
async function exportNamedIcons(frameNodeId: string) {
  const fileRes = await fetch(
    `https://api.figma.com/v1/files/${FILE_KEY}/nodes?ids=${frameNodeId}`,
    { headers: { 'X-Figma-Token': PAT } }
  );
  const fileData = await fileRes.json();
  const frame = fileData.nodes[frameNodeId].document;

  // Build nodeId -> name map
  const nameMap = new Map<string, string>();
  for (const child of frame.children ?? []) {
    const safeName = child.name
      .toLowerCase()
      .replace(/[^a-z0-9]+/g, '-')
      .replace(/^-|-$/g, '');
    nameMap.set(child.id, safeName);
  }

  // Export
  const nodeIds = Array.from(nameMap.keys());
  const imageUrls = await exportImages(nodeIds, 'svg');

  mkdirSync('./assets/icons', { recursive: true });
  for (const [nodeId, url] of Object.entries(imageUrls)) {
    if (!url) continue;
    const name = nameMap.get(nodeId) ?? nodeId.replace(':', '-');
    const res = await fetch(url);
    const svg = await res.text();
    writeFileSync(`./assets/icons/${name}.svg`, svg);
    console.log(`Exported: ${name}.svg`);
  }
}

# Export a single node as PNG at 2x
curl -s -H "X-Figma-Token: ${FIGMA_PAT}" \
  "https://api.figma.com/v1/images/${FIGMA_FILE_KEY}?ids=0:1&format=png&scale=2" \
  | jq -r '.images["0:1"]'
# Returns a temporary URL to the rendered image