import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";
import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";
import viteCompression from "vite-plugin-compression";
import eslint from "vite-plugin-eslint";

// const apiUrl = new URL(import.meta.env.VITE_API_URL);
const dirname = path.dirname(fileURLToPath(import.meta.url));

const { dependencies } = JSON.parse(
  fs.readFileSync(path.join(dirname, "package.json"))
);

const vendorPackages = [
  "react",
  "react-router-dom",
  "react-router",
  "react-dom",
];

function renderChunks(deps) {
  let chunks = {};
  Object.keys(deps).forEach((key) => {
    if (vendorPackages.includes(key)) return;
    chunks[key] = [key];
  });
  return chunks;
}

export const OUTPUT_DIRECTORY = "dist";

// https://vitejs.dev/config/sss
export default defineConfig({
  // define: {
  //   global: {},
  // },
  plugins: [
    react(),
    eslint(),
    viteCompression({
      alsgorithm: "brotliCompress",
      filter: /.(js|mjs|json|css|html|svg)$/i,
    }),
  ],

  build: {
    outDir: OUTPUT_DIRECTORY,
    sourcemap: false,
    rollupOptions: {
      external: ["fsevents"],
      output: {
        manualChunks: {
          vendor: vendorPackages,
          ...renderChunks(dependencies),
        },
      },
    },
  },
  resolve: {
    alias: {
      Components: path.resolve(dirname, "./src/components"),
      Pages: path.resolve(dirname, "./src/pages"),
      Utils: path.resolve(dirname, "./src/utils"),
      Assets: path.resolve(dirname, "./src/assets"),
      Context: path.resolve(dirname, "./src/context"),
      Routes: path.resolve(dirname, "./src/routes"),
      Src: path.resolve(dirname, "./src"),
      Hooks: path.resolve(dirname, "./src/hooks"),
    },
  },
});