import { defineConfig } from "vite";
import react from "@vitejs/plugin-react-oxc";
import tailwindcss from "@tailwindcss/vite";
import path from "path";

// Browser requests arrive at Vite, which then proxies them to the backend.
// Locally the backend is published on the host; Docker Compose supplies the
// service hostname instead (see docker-compose.yml).
const backendUrl = process.env.BACKEND_URL ?? "http://localhost:8001";

export default defineConfig({
  plugins: [react(), tailwindcss()],
  resolve: {
    alias: {
      "@": path.resolve(__dirname, "./src"),
    },
  },
  server: {
    proxy: {
      // CopilotKit runtime (Hono server, dev only)
      "/api/copilotkit": {
        target: "http://localhost:3001",
        changeOrigin: true,
      },
      // All other API calls → Python backend
      "/api": {
        target: backendUrl,
        changeOrigin: true,
      },
    },
  },
});