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import { bundleAsync, transform } from "../deps/lightningcss.ts";import { resolveInclude } from "../core/utils/path.ts";import { merge } from "../core/utils/object.ts";import { read } from "../core/utils/read.ts";import textLoader from "../core/loaders/text.ts";import { Page } from "../core/file.ts";import { prepareAsset, saveAsset } from "./source_maps.ts";import { posix } from "../deps/path.ts";
import type Site from "../core/site.ts";import type {  BundleAsyncOptions,  CustomAtRules,  TransformOptions,} from "../deps/lightningcss.ts";
export interface Options {  /** The list of extensions this plugin applies to */  extensions?: string[];
  /**   * Custom includes path   * @default `site.options.includes`   */  includes?: string | false;
  /** Options passed to parcel_css */  options?: Omit<BundleAsyncOptions<CustomAtRules>, "filename">;}
// Default optionsexport const defaults: Options = {  extensions: [".css"],  includes: "",  options: {    minify: true,    drafts: {      customMedia: true,    },    targets: {      android: version(98),      chrome: version(98),      edge: version(98),      firefox: version(97),      ios_saf: version(15),      safari: version(15),      opera: version(83),      samsung: version(16),    },  },};
/** A plugin to load all CSS files and process them using parcelCSS */export default function (userOptions?: Options) {  return (site: Site) => {    const options = merge<Options>(      { ...defaults, includes: site.options.includes },      userOptions,    );
    site.loadAssets(options.extensions);
    if (options.includes) {      site.process(options.extensions, lightningCSSBundler);      site.ignore(options.includes);    } else {      site.process(        options.extensions,        (pages) => pages.forEach(lightningCSSTransformer),      );    }
    function lightningCSSTransformer(file: Page) {      const { content, filename, sourceMap, enableSourceMap } = prepareAsset(        site,        file,      );
      // Process the code with parcelCSS      const code = new TextEncoder().encode(content);      const transformOptions: TransformOptions<CustomAtRules> = {        filename,        code,        sourceMap: enableSourceMap,        inputSourceMap: JSON.stringify(sourceMap),        ...options.options,      };
      const result = transform(transformOptions);      const decoder = new TextDecoder();
      saveAsset(        site,        file,        decoder.decode(result.code),        enableSourceMap ? decoder.decode(result.map!) : undefined,      );    }
    /**     * Bundles all CSS files into a single file     * This cannot be done in parallel because ligthningcss has a bug that mixes the imports of all files     * Seems like executing the bundler in sequence fixes the issue     */    async function lightningCSSBundler(files: Page[]) {      for (const file of files) {        const { content, filename, sourceMap, enableSourceMap } = prepareAsset(          site,          file,        );
        const includes = options.includes as string;
        // Process the code with lightningCSS        const bundleOptions: BundleAsyncOptions<CustomAtRules> = {          filename,          sourceMap: enableSourceMap,          inputSourceMap: JSON.stringify(sourceMap),          ...options.options,          resolver: {            resolve(id: string, from: string) {              return resolveInclude(id, includes, posix.dirname(from));            },            async read(file: string) {              if (file === filename) {                return content;              }
              if (file.startsWith("http")) {                return read(file, false, {                  headers: {                    "User-Agent":                      "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/115.0",                  },                });              }
              return await site.getContent(file, textLoader) as string;            },          },        };
        const result = await bundleAsync(bundleOptions);        const decoder = new TextDecoder();
        saveAsset(          site,          file,          decoder.decode(result.code),          enableSourceMap ? decoder.decode(result.map!) : undefined,        );      }    }  };}
/** * Convert a version number to a single 24-bit number */export function version(major: number, minor = 0, patch = 0): number {  return (major << 16) | (minor << 8) | patch;}