import fs from 'fs';
import { join } from 'path';

import {
  getChallengeOrderFromFileTree,
  getChallengeOrderFromMeta
} from './get-challenge-order';

const basePath = join(
  process.cwd(),
  '__fixtures__' + process.env.JEST_WORKER_ID
);
const commonPath = join(basePath, 'curriculum', 'challenges');

const block = 'project-get-challenge-order';
const metaPath = join(commonPath, '_meta', block);
const superBlockPath = join(
  commonPath,
  'english',
  'superblock-get-challenge-order'
);
const projectPath = join(superBlockPath, block);

describe('get-challenge-order helper', () => {
  beforeEach(() => {
    fs.mkdirSync(superBlockPath, { recursive: true });
    fs.mkdirSync(projectPath, { recursive: true });
    fs.mkdirSync(metaPath, { recursive: true });
  });
  describe('getChallengeOrderFromMeta helper', () => {
    beforeEach(() => {
      fs.writeFileSync(
        join(projectPath, 'this-is-a-challenge.md'),
        '---\nid: 1\ntitle: This is a Challenge\n---',
        'utf-8'
      );
      fs.writeFileSync(
        join(projectPath, 'what-a-cool-thing.md'),
        '---\nid: 100\ntitle: What a Cool Thing\n---',
        'utf-8'
      );
      fs.writeFileSync(
        join(projectPath, 'i-dunno.md'),
        '---\nid: 2\ntitle: I Dunno\n---'
      );
      fs.writeFileSync(
        join(metaPath, 'meta.json'),
        `{
      "id": "mock-id",
      "challengeOrder": [{"id": "1", "title": "This title is wrong"}, {"id": "2", "title": "I Dunno"}, {"id": "100", "title": "What a Cool Thing"}]}`,
        'utf-8'
      );
    });

    it('should load the file order', () => {
      process.env.CALLING_DIR = projectPath;
      const challengeOrder = getChallengeOrderFromMeta();
      expect(challengeOrder).toEqual([
        { id: '1', title: 'This title is wrong' },
        { id: '2', title: 'I Dunno' },
        { id: '100', title: 'What a Cool Thing' }
      ]);
    });
  });

  describe('getChallengeOrderFromFileTree helper', () => {
    beforeEach(() => {
      fs.writeFileSync(
        join(projectPath, 'step-001.md'),
        '---\nid: a8d97bd4c764e91f9d2bda01\ntitle: Step 1\n---',
        'utf-8'
      );
      fs.writeFileSync(
        join(projectPath, 'step-002.md'),
        '---\nid: a6b0bb188d873cb2c8729495\ntitle: Step 2\n---',
        'utf-8'
      );
      fs.writeFileSync(
        join(projectPath, 'step-003.md'),
        '---\nid: a5de63ebea8dbee56860f4f2\ntitle: Step 3\n---'
      );
      fs.writeFileSync(
        join(metaPath, 'meta.json'),
        `{
      "id": "mock-id",
      "challengeOrder": [{"id": "a8d97bd4c764e91f9d2bda01", "title": "Step 1"}, {"id": "a6b0bb188d873cb2c8729495", "title": "Step 3"}, {"id": "a5de63ebea8dbee56860f4f2", "title": "Step 2"}]}`,
        'utf-8'
      );
    });

    it('should load the file order', async () => {
      expect.assertions(1);
      process.env.CALLING_DIR = projectPath;
      const challengeOrder = await getChallengeOrderFromFileTree();
      expect(challengeOrder).toEqual([
        { id: 'a8d97bd4c764e91f9d2bda01', title: 'Step 1' },
        { id: 'a6b0bb188d873cb2c8729495', title: 'Step 2' },
        { id: 'a5de63ebea8dbee56860f4f2', title: 'Step 3' }
      ]);
    });
  });
  afterEach(() => {
    delete process.env.CALLING_DIR;
    try {
      fs.rmSync(basePath, { recursive: true });
    } catch (err) {
      console.log(err);
      console.log('Could not remove fixtures folder.');
    }
  });
});