import webpack from 'webpack';

const mode = process.env.BUILD_MODE ?? 'standalone';
console.log('[Next] build mode', mode);

const disableChunk = !!process.env.DISABLE_CHUNK || mode === 'export';
console.log('[Next] build with chunk: ', !disableChunk);

/** @type {import('next').NextConfig} */
const nextConfig = {
  webpack(config) {
    config.module.rules.push({
      test: /\.svg$/,
      use: ['@svgr/webpack'],
    });

    if (disableChunk) {
      config.plugins.push(
        new webpack.optimize.LimitChunkCountPlugin({ maxChunks: 1 }),
      );
    }

    config.resolve.fallback = {
      child_process: false,
    };

    return config;
  },
  output: mode,
  images: {
    unoptimized: mode === 'export',
  },
  experimental: {
    forceSwcTransforms: true,
  },
};

const CorsHeaders = [
  { key: 'Access-Control-Allow-Credentials', value: 'true' },
  { key: 'Access-Control-Allow-Origin', value: '*' },
  {
    key: 'Access-Control-Allow-Methods',
    value: '*',
  },
  {
    key: 'Access-Control-Allow-Headers',
    value: '*',
  },
  {
    key: 'Access-Control-Max-Age',
    value: '86400',
  },
];

if (mode !== 'export') {
  nextConfig.headers = async () => {
    return [
      {
        source: '/api/:path*',
        headers: CorsHeaders,
      },
    ];
  };

  nextConfig.rewrites = async () => {
    const ret = [
      // adjust for previous version directly using "/api/proxy/" as proxy base route
      // {
      //   source: "/api/proxy/v1/:path*",
      //   destination: "https://api.openai.com/v1/:path*",
      // },
      {
        // https://{resource_name}.openai.azure.com/openai/deployments/{deploy_name}/chat/completions
        source: '/api/proxy/azure/:resource_name/deployments/:deploy_name/:path*',
        destination: 'https://:resource_name.openai.azure.com/openai/deployments/:deploy_name/:path*',
      },
      {
        source: '/api/proxy/google/:path*',
        destination: 'https://generativelanguage.googleapis.com/:path*',
      },
      {
        source: '/api/proxy/openai/:path*',
        destination: 'https://api.openai.com/:path*',
      },
      {
        source: '/api/proxy/anthropic/:path*',
        destination: 'https://api.anthropic.com/:path*',
      },
      {
        source: '/google-fonts/:path*',
        destination: 'https://fonts.googleapis.com/:path*',
      },
      {
        source: '/sharegpt',
        destination: 'https://sharegpt.com/api/conversations',
      },
      {
        source: '/api/proxy/alibaba/:path*',
        destination: 'https://dashscope.aliyuncs.com/api/:path*',
      },
    ];

    return {
      beforeFiles: ret,
    };
  };
}

export default nextConfig;