import type { Context } from "@netlify/edge-functions";

// Edge function to proxy API endpoints to Convex HTTP
export default async function handler(
  request: Request,
  _context: Context,
): Promise<Response> {
  const convexUrl =
    Deno.env.get("VITE_CONVEX_URL") || Deno.env.get("CONVEX_URL");

  if (!convexUrl) {
    return new Response(
      JSON.stringify({
        error:
          "VITE_CONVEX_URL not set. Add it to Netlify environment variables.",
      }),
      { status: 500, headers: { "Content-Type": "application/json" } },
    );
  }

  // Construct the Convex site URL for the HTTP endpoint
  const convexSiteUrl = convexUrl.replace(".cloud", ".site");
  const url = new URL(request.url);
  const targetUrl = `${convexSiteUrl}${url.pathname}${url.search}`;

  try {
    const response = await fetch(targetUrl, {
      headers: {
        Accept: "application/json",
      },
    });

    if (!response.ok) {
      return new Response(JSON.stringify({ error: "API endpoint error" }), {
        status: response.status,
        headers: { "Content-Type": "application/json" },
      });
    }

    const data = await response.text();
    const contentType =
      response.headers.get("Content-Type") || "application/json";

    return new Response(data, {
      headers: {
        "Content-Type": contentType,
        "Cache-Control": "public, max-age=300, s-maxage=600",
        "Access-Control-Allow-Origin": "*",
      },
    });
  } catch {
    return new Response(JSON.stringify({ error: "Failed to fetch from API" }), {
      status: 502,
      headers: { "Content-Type": "application/json" },
    });
  }
}

export const config = {
  path: ["/api/posts", "/api/post", "/api/export"],
};