import { tanstackStart } from "@tanstack/react-start/plugin/vite";
import { defineConfig, loadEnv } from "vite";
import tsConfigPaths from "vite-tsconfig-paths";
import viteReact from "@vitejs/plugin-react";
import tailwindcss from "@tailwindcss/vite";
import { cloudflare } from "@cloudflare/vite-plugin";
import { devtools } from "@tanstack/devtools-vite";
import { leanWorkerBundle } from "./vite-plugin-lean-worker-bundle";

export default defineConfig(({ mode }) => {
  // PORT/ALLOWED_HOST are documented self-host knobs (SELF_HOSTING_DOCKER.md,
  // compose.yaml) but were never actually read here — every deployment was
  // silently stuck on port 3001 and this one hardcoded domain, breaking any
  // second instance on a different domain or port. Defaults keep existing
  // deployments that don't set these working exactly as before.
  //
  // Read via Vite's own loadEnv(), not bare process.env: process.env inside
  // this config function only sees whatever the OS process environment
  // already has (e.g. exported by the shell or pm2's ecosystem file) —
  // Vite's .env-file loading (envPrefix below) only reaches import.meta.env
  // in app code, not this function. loadEnv reads the same .env files Vite
  // always has, regardless of how the process was launched.
  const env = loadEnv(mode, process.cwd(), "");
  const port = Number(env.PORT) || 3001;

  const showDevtools = false;

  const allowedHosts = [
    "seo.thedomainnest.com",
    env.ALLOWED_HOST,
  ].filter((host): host is string => Boolean(host));

  return {
    envPrefix: [
      "VITE_",
      "AUTH_MODE",
      "BYPASS_EMAIL_VERIFICATION",
      "POSTHOG_PUBLIC_KEY",
      "POSTHOG_HOST",
      "TURNSTILE_SITE_KEY",
      "GOOGLE_CLIENT_ID",
    ],

    server: {
      host: "0.0.0.0",
      port,
      allowedHosts,
    },

    preview: {
      host: "0.0.0.0",
      port,
      allowedHosts,
    },

    build: {
      sourcemap: false,
      outDir: "dist",
    },

    plugins: [
      leanWorkerBundle(),

      showDevtools
        ? devtools({
            consolePiping: {
              enabled: true,
              levels: ["log", "warn", "error", "info", "debug"],
            },
          })
        : null,

      cloudflare({
        inspectorPort: false,
        viteEnvironment: { name: "ssr" },
        auxiliaryWorkers: [
          {
            configPath: "./wrangler.audit.jsonc",
          },
        ],
      }),

      tsConfigPaths(),

      tanstackStart(),

      viteReact(),

      tailwindcss(),
    ],
  };
});