/*
This configuration was taken from stefanonepa's project template
Copyright (c) 2021 stefanonepa, MIT License
https://github.com/stefanonepa/svelte-component-ts

This is a modified version of rollup-plugin-css-only
Copyright (c) 2016 Thomas Ghysels
https://github.com/thgh/rollup-plugin-css-only
 */

import { createFilter } from "@rollup/pluginutils";

function css(options) {
  if (options === void 0) options = {};

  var filter = createFilter(
    ["**/*.css", "**/*.svelte", "**/*.js", "**/*.ts"],
    options.exclude
  );
  var isCssOnly = createFilter(options.include || ["**/*.css"], options.exclude);
  var styles = {};
  var order = [];
  var dest = options.output;
  var changes = 0;

  return {
    name: "css",
    transform: function transform(code, id) {
      if (!isCssOnly(id)) {
        return;
      }

      // Track the order that each stylesheet is imported.
      if (!order.includes(id)) {
        order.push(id);
      }

      // Keep track of every stylesheet
      // Check if it changed since last render
      if (styles[id] !== code && (styles[id] || code)) {
        styles[id] = code;
        changes++;
      }
      return "";
    },
    generateBundle: function generateBundle(opts, bundle) {
      // Combine all stylesheets, respecting import order
      var css = "";
      for (var x = 0; x < order.length; x++) {
        var id = order[x];
        css += styles[id] || "";
      }

      // Emit styles through callback
      if (typeof options.output === "function") {
        options.output(css, styles, bundle);
      }
    },
  };
}

export default css;