import type { NextConfig } from "next";
import { config } from "dotenv";
import { resolve } from "path";

// Load root .env so REMOTE_API_URL is available to next.config.ts
config({ path: resolve(__dirname, "../../.env") });

const remoteApiUrl = process.env.REMOTE_API_URL || "http://localhost:8080";

// Parse hostnames from CORS_ALLOWED_ORIGINS so that Next.js dev server
// allows cross-origin HMR / webpack requests (e.g. from Tailscale IPs).
const allowedDevOrigins = process.env.CORS_ALLOWED_ORIGINS
  ? process.env.CORS_ALLOWED_ORIGINS.split(",")
      .map((origin) => {
        try {
          return new URL(origin.trim()).host;
        } catch {
          return origin.trim();
        }
      })
      .filter(Boolean)
  : undefined;

const nextConfig: NextConfig = {
  ...(allowedDevOrigins && allowedDevOrigins.length > 0
    ? { allowedDevOrigins }
    : {}),
  images: {
    formats: ["image/avif", "image/webp"],
    qualities: [75, 80, 85],
  },
  async rewrites() {
    return [
      {
        source: "/api/:path*",
        destination: `${remoteApiUrl}/api/:path*`,
      },
      {
        source: "/ws",
        destination: `${remoteApiUrl}/ws`,
      },
      {
        source: "/auth/:path*",
        destination: `${remoteApiUrl}/auth/:path*`,
      },
    ];
  },
};

export default nextConfig;