#!/usr/bin/env node
'use strict';

// {{generated_message}}

var fs = require('fs');
var path = require('path');
var nodeModulesPath = '{{node_modules_path}}';
var ghooks = getGhooksEntryPoint();

if (checkForGHooks(ghooks)) {
  require(ghooks)(nodeModulesPath, __filename);
}

function getGhooksEntryPoint() {
  try {
    require('ghooks');
    return 'ghooks';
  } catch (e) {
    return getGhooksAbsoluteEntryPoint();
  }
}

function getGhooksAbsoluteEntryPoint() {
  var worktree = getWorkTree();
  if (worktree) {
    return path.resolve(__dirname, '../', worktree, 'node_modules', 'ghooks');
  }
  return path.resolve(nodeModulesPath, 'ghooks');
}

function checkForGHooks(ghooksPath) {
  try {
    require(ghooksPath);
  } catch (e) {
    warnAboutGHooks();
    return false;
  }
  return true;
}

function getWorkTree() {
  try {
    return getWorkTreeFromConfig(getConfigFileContent());
  } catch (e) {
    return null;
  }
}

function getConfigFileContent() {
  var configFile = path.resolve(__dirname, '../config');
  var fileStat = fs.statSync(configFile);
  if (fileStat && fileStat.isFile()) {
    return fs.readFileSync(configFile, 'utf8');
  }
  return '';
}

function getWorkTreeFromConfig(configFileContent) {
  var worktreeRegEx = /\[core\][^]{0,}worktree = ([^\n]{1,})[^]{0,}/;
  return worktreeRegEx.test(configFileContent) ? configFileContent.replace(worktreeRegEx, '$1') : '';
}

function warnAboutGHooks() {
  console.warn( // eslint-disable-line no-console
  'ghooks not found!\n' + 'Make sure you have it installed on your "node_modules".\n' + 'Skipping git hooks.');
}