import { globrex } from "./globrex.ts";

export interface GlobOptions {
  // Allow ExtGlob features
  extended?: boolean;
  // When globstar is true, '/foo/**' is equivelant
  // to '/foo/*' when globstar is false.
  // Having globstar set to true is the same usage as
  // using wildcards in bash
  globstar?: boolean;
  // be laissez faire about mutiple slashes
  strict?: boolean;
  // Parse as filepath for extra path related features
  filepath?: boolean;
  // Flag to use in the generated RegExp
  flags?: string;
}

/**
 * Generate a regex based on glob pattern and options
 * This was meant to be using the the `fs.walk` function
 * but can be used anywhere else.
 * Examples:
 *
 *    Looking for all the `ts` files:
 *    walkSync(".", {
 *      match: [glob("*.ts")]
 *    })
 *
 *    Looking for all the `.json` files in any subfolder:
 *    walkSync(".", {
 *      match: [glob(join("a", "**", "*.json"),flags: "g",
 *      extended: true,
 *      globstar: true
 *      })]
 *    })
 *
 * @param glob - Glob pattern to be used
 * @param options - Specific options for the glob pattern
 * @returns A RegExp for the glob pattern
 */
export function glob(glob: string, options: GlobOptions = {}): RegExp {
  return globrex(glob, options).regex;
}