import * as glob from 'glob';
import { lstatSync } from 'fs';

export interface Config {
    github_token: string,
    github_ref: string,
    github_repository: string,
    // user provided
    input_name?: string,
    input_body?: string,
    input_body_path?: string,
    input_files?: string[],
    input_draft?: boolean,
}

type Env = { [key: string]: string | undefined };

export const parseConfig = (env: Env): Config => {
  return {
    github_token: env.GITHUB_TOKEN || "",
    github_ref: (env.GITHUB_REF || ""),
    github_repository: env.GITHUB_REPOSITORY || "",
    input_name: env.INPUT_NAME,
    input_body: env.INPUT_BODY,
    input_body_path: env.INPUT_BODY_PATH,
    input_files: (env.INPUT_FILES || "").split(","),
    input_draft: env.INPUT_DRAFT === 'true'
  }
}

export const paths = (patterns: string[]): string[] => {
  return patterns.reduce((acc: string[], pattern: string): string[] => {
    return acc.concat(glob.sync(pattern).filter(path => lstatSync(path).isFile()));
  }, [])
}

export const isTag = (ref: string): boolean => {
  return ref.startsWith("refs/tags/")
}