#!/usr/bin/env node

'use strict';

const mock = require('mock-require')
const crypto = require('crypto');
const childProcess = require('child_process');
const carmi = require('../../')

const getHash = input => crypto.createHash('md5').update(input).digest('hex').slice(-7);

const getLsTreeResultLine = (filename, withRandomHash) => {
  const hashInput = withRandomHash && withRandomHash !== 'undefined' ? Date.now().toString() : filename;
  return `123456 blob ${getHash(hashInput)} ${filename}`;
};

// Mock cache directory to allow tests working with own one.
if (process.env.CACHE_DIR) {
  mock('find-cache-dir', () => process.env.CACHE_DIR)
}

// Mock git ls-tree call to check git-hash test scenario
mock('child_process', {
  ...childProcess,
  execSync(cmd, ...args) {
    if (cmd.includes('git ls-tree')) {
      if (process.env.ERROR_STAGE === 'git-hash') {
        throw new Error('Oops');
      }
      const withRandomHash = process.env.RANDOM_GIT_HASH;
      return [getLsTreeResultLine('test.carmi.js', withRandomHash), getLsTreeResultLine('test2.carmi.js', withRandomHash)].join('\n');
    }
    return childProcess.execSync(cmd, ...args);
  }
});

// Mock carmi to send compilation call message to the parrent process.
mock('../..', {
  ...carmi,
  compile() {
    process.send('carmi:compile')
    return ''
  }
})

// Require original carmi binary after all mocks installed
require('../carmi')