/**
 * Module dependencies.
 */

var Base = require('./base');
var utils = require('../utils');
var inherits = utils.inherits;
var fs = require('fs');
var escape = utils.escape;

/**
 * Save timer references to avoid Sinon interfering (see GH-237).
 */

/* eslint-disable no-unused-vars, no-native-reassign */
var Date = global.Date;
var setTimeout = global.setTimeout;
var setInterval = global.setInterval;
var clearTimeout = global.clearTimeout;
var clearInterval = global.clearInterval;
/* eslint-enable no-unused-vars, no-native-reassign */

/**
 * Expose `XUnit`.
 */

exports = module.exports = XUnit;

/**
 * Initialize a new `XUnit` reporter.
 *
 * @api public
 * @param {Runner} runner
 */
function XUnit(runner, options) {
  Base.call(this, runner);

  var stats = this.stats;
  var tests = [];
  var self = this;

  if (options.reporterOptions && options.reporterOptions.output) {
    if (!fs.createWriteStream) {
      throw new Error('file output not supported in browser');
    }
    self.fileStream = fs.createWriteStream(options.reporterOptions.output);
  }

  runner.on('pending', function(test) {
    tests.push(test);
  });

  runner.on('pass', function(test) {
    tests.push(test);
  });

  runner.on('fail', function(test) {
    tests.push(test);
  });

  runner.on('end', function() {
    self.write(tag('testsuite', {
      name: 'Mocha Tests',
      tests: stats.tests,
      failures: stats.failures,
      errors: stats.failures,
      skipped: stats.tests - stats.failures - stats.passes,
      timestamp: (new Date()).toUTCString(),
      time: (stats.duration / 1000) || 0
    }, false));

    tests.forEach(function(t) {
      self.test(t);
    });

    self.write('</testsuite>');
  });
}

/**
 * Inherit from `Base.prototype`.
 */
inherits(XUnit, Base);

/**
 * Override done to close the stream (if it's a file).
 *
 * @param failures
 * @param {Function} fn
 */
XUnit.prototype.done = function(failures, fn) {
  if (this.fileStream) {
    this.fileStream.end(function() {
      fn(failures);
    });
  } else {
    fn(failures);
  }
};

/**
 * Write out the given line.
 *
 * @param {string} line
 */
XUnit.prototype.write = function(line) {
  if (this.fileStream) {
    this.fileStream.write(line + '\n');
  } else {
    console.log(line);
  }
};

/**
 * Output tag for the given `test.`
 *
 * @param {Test} test
 */
XUnit.prototype.test = function(test) {
  var attrs = {
    classname: test.parent.fullTitle(),
    name: test.title,
    time: (test.duration / 1000) || 0
  };

  if (test.state === 'failed') {
    var err = test.err;
    this.write(tag('testcase', attrs, false, tag('failure', {}, false, cdata(escape(err.message) + '\n' + err.stack))));
  } else if (test.pending) {
    this.write(tag('testcase', attrs, false, tag('skipped', {}, true)));
  } else {
    this.write(tag('testcase', attrs, true));
  }
};

/**
 * HTML tag helper.
 *
 * @param name
 * @param attrs
 * @param close
 * @param content
 * @return {string}
 */
function tag(name, attrs, close, content) {
  var end = close ? '/>' : '>';
  var pairs = [];
  var tag;

  for (var key in attrs) {
    if (Object.prototype.hasOwnProperty.call(attrs, key)) {
      pairs.push(key + '="' + escape(attrs[key]) + '"');
    }
  }

  tag = '<' + name + (pairs.length ? ' ' + pairs.join(' ') : '') + end;
  if (content) {
    tag += content + '</' + name + end;
  }
  return tag;
}

/**
 * Return cdata escaped CDATA `str`.
 */

function cdata(str) {
  return '<![CDATA[' + escape(str) + ']]>';
}
