frontend/lib/utils/export.ts

// Export utilities for downloading/exporting ads
import { downloadImageProxy } from "@/lib/api/endpoints";

export const downloadImage = async (url: string | null | undefined, filename: string | null | undefined, adId?: string): Promise<void> => {
  if (!url && !adId) {
    throw new Error("No image URL or ad ID provided");
  }
  
  try {
    // Use proxy endpoint to avoid CORS issues
    const blob = await downloadImageProxy({
      image_url: url || undefined,
      image_id: adId || undefined,
    });
    
    const blobUrl = window.URL.createObjectURL(blob);
    const link = document.createElement("a");
    link.href = blobUrl;
    link.download = filename || "image.png";
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
    window.URL.revokeObjectURL(blobUrl);
  } catch (error) {
    console.error("Error downloading image:", error);
    throw error;
  }
};

export const copyToClipboard = async (text: string): Promise<void> => {
  try {
    await navigator.clipboard.writeText(text);
  } catch (error) {
    console.error("Error copying to clipboard:", error);
    throw error;
  }
};

export const exportAsJSON = (data: any, filename: string): void => {
  const jsonString = JSON.stringify(data, null, 2);
  const blob = new Blob([jsonString], { type: "application/json" });
  const url = window.URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.href = url;
  link.download = filename;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  window.URL.revokeObjectURL(url);
};

export const exportAsCSV = (data: any[], filename: string): void => {
  if (data.length === 0) return;
  
  const headers = Object.keys(data[0]);
  const csvRows = [
    headers.join(","),
    ...data.map((row) =>
      headers.map((header) => {
        const value = row[header];
        // Escape commas and quotes in CSV
        if (typeof value === "string" && (value.includes(",") || value.includes('"'))) {
          return `"${value.replace(/"/g, '""')}"`;
        }
        return value ?? "";
      }).join(",")
    ),
  ];
  
  const csvString = csvRows.join("\n");
  const blob = new Blob([csvString], { type: "text/csv" });
  const url = window.URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.href = url;
  link.download = filename;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  window.URL.revokeObjectURL(url);
};