import cytoscape from "cytoscape";

function downloadBlob(blob: Blob, filename: string): void {
  const url = URL.createObjectURL(blob);
  const a = document.createElement("a");
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
}

export function exportSvg(cy: cytoscape.Core): void {
  const svgContent = cy.svg({ full: true });
  const blob = new Blob([svgContent], { type: "image/svg+xml" });
  downloadBlob(blob, "dfgraph.svg");
}

export async function exportPng(cy: cytoscape.Core): Promise<void> {
  const blob = await (cy.png({
    full: true,
    output: "blob-promise",
    scale: 2,
  }) as Promise<Blob>);
  downloadBlob(blob, "dfgraph.png");
}

export async function copyPng(cy: cytoscape.Core): Promise<void> {
  const blob = await (cy.png({
    full: true,
    output: "blob-promise",
    scale: 2,
  }) as Promise<Blob>);
  const item = new ClipboardItem({ "image/png": blob });
  await navigator.clipboard.write([item]);
}