#!/usr/bin/env node

'use strict';

var argv = require('minimist')(process.argv.slice(2), {
  alias: {
    output: ['o', 'out'],
    pretty: 'p',
    watch: 'w'
  }
});
var fs = require('fs');
var path = require('path');
var glob = require('glob');
var contra = require('contra');
var mkdirp = require('mkdirp');
var monocle = require('monocle')();
var jade = require('..');
var files = argv._;
var extname = '.js';
var re = /\.jade$/;
var options = {};

// worth a shot, tell jade it can use ultramarked for this thing
try {
  var transformers = require('jade/node_modules/transformers');
  transformers.markdown.engines.push('ultramarked');
} catch (e) {
}

if (argv.obj) {
  options = JSON.parse(argv.obj);
}

options.compileDebug = argv.debug !== false;
options.out = argv.out || argv.o;
options.pretty = argv.pretty || argv.p;

if (files.length === 1 && files[0].indexOf('*') !== -1) {
  files = glob.sync(files[0]); // `npm run` doesn't expand the pattern :(
}

contra.each(files, renderFile);

if (argv.watch) {
  monocle.watchFiles({
    files: files,
    listener: listener
  });
}

function renderFile (file, done) {
  contra.waterfall([
    function (next) {
      fs.lstat(file, next);
    },
    function (stat, next) {
      if ((stat.isFile() || stat.isSymbolicLink()) && re.test(file)) {
        render(next);
      } else if (stat.isDirectory()) {
        dir(next);
      } else {
        next();
      }
    }
  ], done);

  function render (done) {
    var prefix = 'var jade = require("jadum/runtime");\nmodule.exports = ';
    var fn;

    contra.waterfall([
      function (next) {
        fs.readFile(file, 'utf8', next);
      },
      function (data, next) {
        options.filename = file;
        fn = jade.compileClient(data, options);
        file = file.replace(re, extname);
        if (options.out) {
          file = path.join(options.out, file);
        }
        var dir = path.resolve(path.dirname(file));
        mkdirp(dir, next);
      },
      function (next) {
        fs.writeFile(file, prefix + fn, 'utf8', next);
      }
    ], done);
  }

  function dir (done) {
    contra.waterfall([
      function (next) {
        fs.readdir(file, next);
      },
      function (files, next) {
        contra.each(files.map(expand), renderFile, next);
      }
    ], done);
  }

  function expand (filename) {
    return file + '/' + filename;
  }
}

function listener (file) {
  var relative = path.relative(process.cwd(), file.absolutePath);
  console.log('jadum: Changes detected in %s, recompiling.', relative);
  renderFile(relative);
}