import { execSync } from 'child_process';
import fs from 'fs';
import path from 'path';
import react from '@vitejs/plugin-react';
import { defineConfig } from 'vite';

// 构建指纹：版本 + commit hash + 构建时间（设置页「关于」展示，排障救命）
const pkg = JSON.parse(fs.readFileSync(path.resolve(__dirname, 'package.json'), 'utf-8'));
const gitHash = (() => {
  try {
    return execSync('git rev-parse --short HEAD').toString().trim();
  } catch {
    return 'unknown';
  }
})();
const buildTime = new Date().toISOString();
const APP_VERSION = `${pkg.version}+${gitHash} (${buildTime.slice(0, 16)})`;

export default defineConfig({
  base: '/',
  define: {
    __APP_VERSION__: JSON.stringify(APP_VERSION),
  },
  plugins: [react()],
  build: {
    rollupOptions: {
      output: {
        manualChunks(id) {
          if (!id.includes('node_modules')) return;
          if (id.includes('react') || id.includes('react-router')) return 'vendor-react';
          if (id.includes('@codemirror')) return 'vendor-editor';
          if (id.includes('@radix-ui')) return 'vendor-ui';
        },
      },
    },
  },
  server: {
    port: 5173,
    strictPort: true,
    proxy: {
      '/api': {
        // 本地联调可用 API_PROXY_TARGET=http://localhost:9001 npm run dev 指向测试实例
        target: process.env.API_PROXY_TARGET || 'http://localhost:9000',
        changeOrigin: true,
      },
    },
  },
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
});