import { defineConfig } from 'vite';
import { svelte } from '@sveltejs/vite-plugin-svelte';

// The edge Connect service is scrabble.edge.v1.Gateway; the gateway serves it over
// h2c on :8081 by default. In dev we proxy the RPC path so the browser (which can
// not speak h2c directly) talks to the dev server on the same origin. In `mock`
// mode the app runs entirely against an in-memory fake transport — no gateway,
// no backend, no Postgres — which is what `pnpm start` launches.
const RPC_PREFIX = '/scrabble.edge.v1.Gateway';

export default defineConfig(({ mode }) => ({
  // Relative asset base so the one build serves under any path — the gateway maps the
  // Telegram Mini App to /telegram/ (the hash router is path-agnostic).
  base: './',
  plugins: [svelte()],
  server: {
    port: 5173,
    proxy:
      mode === 'mock'
        ? undefined
        : {
            [RPC_PREFIX]: {
              target: process.env.GATEWAY_URL || 'http://localhost:8081',
              changeOrigin: true,
            },
          },
  },
  build: {
    target: 'es2022',
    sourcemap: true,
  },
}));