#!/usr/bin/env node

'use strict';

const { indent } = require('../lib/utils/string');
const buddyFactory = require('../lib/buddy');
const chalk = require('chalk');
const fs = require('fs');
const lessPlugin = require('../packages/buddy-plugin-less');
const nunjucksPlugin = require('../packages/buddy-plugin-nunjucks');
const path = require('path');
const rimraf = require('rimraf');

const arg = process.argv[2];
const rootDir = path.resolve(__dirname, '../examples');
const examples = fs.readdirSync(rootDir)
  .filter((item) => fs.statSync(path.resolve(rootDir, item)).isDirectory());

process.env.NODE_ENV = 'development';

// Print usage
if (!arg) {
  const list = examples
    .map((dir) => `- ${chalk.yellow(dir.slice(0, 2))} ${dir.slice(3).replace('-', ' ')}`)
    .join('\n');

  return console.log(`
  ${chalk.yellow('To run an example:')} npm run example ${chalk.yellow('01')}

${indent(list, 3)}
  `);
}

const index = parseInt(arg, 10) - 1;
const exampleDir = examples[index];

if (!exampleDir) return console.log(`couldn't find example for ${chalk.red(arg)}`);

const assets = fs.readdirSync(path.resolve(rootDir, exampleDir))
  .reduce((assets, item) => {
    const filepath = path.resolve(rootDir, exampleDir, item);

    if (fs.statSync(filepath).isDirectory()) return assets;
    assets[path.basename(item)] = fs.readFileSync(filepath, 'utf8');
    return assets;
  }, {});

const buddy = buddyFactory(path.resolve(rootDir, exampleDir, 'buddy.js'), { plugins: [lessPlugin, nunjucksPlugin] });

buddy.build((err, filepaths) => {
  if (err) return console.error(err);

  filepaths.forEach((filepath) => {
    const name = path.basename(filepath);

    assets[name] = fs.readFileSync(filepath, 'utf8');
  });

  rimraf.sync(path.resolve(rootDir, exampleDir, 'www'));

  console.log(`\n\n\n${getInlinedTips(assets)}\n\n\n`);
});

function getInlinedTips (assets) {
  return assets['tips.txt']
    .replace(/(`[^`]+`)/g, (match, p) => chalk.yellow(p.slice(1, -1)))
    .replace(/(#[^#]+#)/g, (match, p) => chalk.inverse(p.replace(/#/g, ' ')))
    .replace(/{{([^}]+)}}/g, (match, p) => indent(chalk.yellow(assets[p]), 3));
}