import type { Plugin } from "postcss";

declare type GenerateScopedNameFunction = (
  name: string,
  filename: string,
  css: string
) => string;

declare type LocalsConventionFunction = (
  originalClassName: string,
  generatedClassName: string,
  inputFile: string
) => string;

declare class Loader {
  constructor(root: string, plugins: Plugin[]);

  fetch(
    file: string,
    relativeTo: string,
    depTrace: string
  ): Promise<{ [key: string]: string }>;

  finalSource?: string | undefined;
}

declare interface Options {
  getJSON?(
    cssFilename: string,
    json: { [name: string]: string },
    outputFilename?: string
  ): void;

  localsConvention?:
    | "camelCase"
    | "camelCaseOnly"
    | "dashes"
    | "dashesOnly"
    | LocalsConventionFunction;

  scopeBehaviour?: "global" | "local";
  globalModulePaths?: RegExp[];

  generateScopedName?: string | GenerateScopedNameFunction;

  hashPrefix?: string;
  exportGlobals?: boolean;
  root?: string;

  Loader?: typeof Loader;

  resolve?: (file: string) => string | Promise<string>;
}

declare interface PostcssModulesPlugin {
  (options: Options): Plugin;
  postcss: true;
}

declare const PostcssModulesPlugin: PostcssModulesPlugin;

export = PostcssModulesPlugin;