import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';

const DIR = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.resolve(DIR, '../..');

function readApiReadToken(): string | undefined {
  if (process.env.API_READ_TOKEN) return process.env.API_READ_TOKEN;
  const p = path.join(ROOT, 'tokens', 'read.json');
  if (!fs.existsSync(p)) return undefined;
  try {
    const raw = fs.readFileSync(p, 'utf8');
    const json = JSON.parse(raw) as { token?: string };
    return json?.token ? String(json.token) : undefined;
  } catch {
    return undefined;
  }
}

const apiReadToken = readApiReadToken();

export default defineConfig({
  plugins: [react()],
  server: {
    port: 5173,
    strictPort: true,
    proxy: {
      '/api': {
        target: process.env.API_PROXY_TARGET || 'http://localhost:8787',
        changeOrigin: true,
        rewrite: (p) => p.replace(/^\/api/, ''),
        configure: (proxy) => {
          proxy.on('proxyReq', (proxyReq) => {
            if (apiReadToken) proxyReq.setHeader('Authorization', `Bearer ${apiReadToken}`);
          });
        },
      },
    },
  },
});