import path from "pathe";
import { getPackageManagerRunner } from "../../util/detect-package-manager.ts";
import type { Assets } from "../assets.ts";
import type { Bindings } from "../bindings.ts";
import {
  spreadBuildProps,
  spreadDevProps,
  Website,
  type WebsiteProps,
} from "../website.ts";
import type { Worker } from "../worker.ts";

/**
 * Properties for creating a Nuxt resource.
 * Extends WebsiteProps, allowing customization of the underlying Website.
 */
export interface NuxtProps<
  B extends Bindings,
  RPC extends Rpc.WorkerEntrypointBranded = Rpc.WorkerEntrypointBranded,
> extends WebsiteProps<B, RPC> {}

/**
 * Represents the output of a Nuxt resource deployment.
 * It resolves to the underlying Cloudflare Worker type, ensuring type safety.
 * Prevents overriding the internal ASSETS binding.
 */
export type Nuxt<
  B extends Bindings,
  RPC extends Rpc.WorkerEntrypointBranded = Rpc.WorkerEntrypointBranded,
> = B extends { ASSETS: any } ? never : Worker<B & { ASSETS: Assets }, RPC>;

/**
 * Creates and deploys a Nuxt application using the Cloudflare Workers preset.
 *
 * This resource simplifies deploying Nuxt applications by providing sensible
 * defaults for the build command, main entrypoint, and assets directory
 * based on the `cloudflare-module` preset output.
 *
 * It wraps the underlying `Website` resource.
 *
 * @param id A unique identifier for the resource.
 * @param props Configuration options for the Nuxt deployment, overriding defaults.
 * @returns A promise that resolves to the deployed Cloudflare Worker details.
 *
 * @example
 * // Deploy a basic Nuxt site with default settings
 * const nuxtSite = await Nuxt("my-nuxt-app");
 *
 * @example
 * // Deploy with custom bindings and build command
 * const db = await D1Database("my-db");
 * const nuxtSiteWithDb = await Nuxt("my-nuxt-app-with-db", {
 *   command: "npm run build:cloudflare", // Specify a custom build command
 *   bindings: {
 *     DB: db, // Add custom bindings
 *   },
 * });
 */
export async function Nuxt<
  B extends Bindings,
  RPC extends Rpc.WorkerEntrypointBranded = Rpc.WorkerEntrypointBranded,
>(id: string, props?: Partial<NuxtProps<B, RPC>>): Promise<Nuxt<B, RPC>> {
  const runner = await getPackageManagerRunner();
  return await Website(id, {
    ...props,
    noBundle: props?.noBundle ?? true,
    build: spreadBuildProps(props, `${runner} nuxt build`),
    dev: spreadDevProps(props, `${runner} nuxt dev`),
    compatibility: "node",
    // Default entry point for cloudflare-module preset
    entrypoint: props?.entrypoint ?? "./.output/server/index.mjs",
    // Default static assets directory for cloudflare-module preset
    assets: props?.assets ?? path.join(".output", "public"),
  });
}