import { fileURLToPath, URL } from "url";
import { createRequire } from "module";
import { defineConfig, loadEnv } from "vite";
import vue from "@vitejs/plugin-vue";
import vuetify from "vite-plugin-vuetify";
import webfontDl from "vite-plugin-webfont-dl";

const require = createRequire(import.meta.url);

// Conditional import for Cloudflare Workers (ESM-only package)
let cloudflarePlugin: (() => any) | null = null;
try {
  const mod = require("@cloudflare/vite-plugin");
  cloudflarePlugin = mod.cloudflare;
} catch {
  // Cloudflare plugin not available, skip
}

// Vite plugin: run MDI icon font subsetting (build only)
function mdiSubset() {
  return {
    name: "vite-plugin-mdi-subset",
    async buildStart() {
      const { runMdiSubset } = await import("./scripts/subset-mdi-font.mjs");
      console.log("\n🔧 Running MDI icon font subsetting...");
      await runMdiSubset();
    },
  };
}

// https://vitejs.dev/config/
export default defineConfig(({ command, mode }) => {
  const env = loadEnv(mode, process.cwd(), "");
  const basePath = env.VITE_BASE_PATH || process.env.BASE_PATH || "/";

  return {
    base: command === "build" ? basePath : "/",

    plugins: [
      // Only run MDI subsetting during production builds, skip in dev server
      ...(command === "build" ? [mdiSubset()] : []),
      vue({
        template: {
          compilerOptions: {
            isCustomElement: (tag) => ["v-list-recognize-title"].includes(tag),
          },
        },
      }),
      vuetify({
        autoImport: true,
      }),
      webfontDl(),
      ...(cloudflarePlugin ? [cloudflarePlugin()] : []),
    ],
    resolve: {
      alias: {
        mermaid: "mermaid/dist/mermaid.js",
        "@": fileURLToPath(new URL("./src", import.meta.url)),
      },
    },
    css: {
      preprocessorOptions: {
        scss: {},
      },
    },
    build: {
      sourcemap: false,
      chunkSizeWarningLimit: 1024 * 1024, // Set the limit to 1 MB
    },
    optimizeDeps: {
      exclude: ["vuetify"],
      entries: ["./src/**/*.vue"],
    },
    server: {
      host: "::",
      port: 3000,
      proxy: {
        "/api": {
          target: env.VITE_DEV_API_PROXY_TARGET || "http://127.0.0.1:6185",
          changeOrigin: true,
          ws: true,
        },
      },
    },
  };
});