/**
 * Module dependencies.
 */

var tty = require('tty')
  , diff = require('diff')
  , ms = require('../ms')
  , utils = require('../utils')
  , supportsColor = process.env ? require('supports-color') : null;

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

var Date = global.Date
  , setTimeout = global.setTimeout
  , setInterval = global.setInterval
  , clearTimeout = global.clearTimeout
  , clearInterval = global.clearInterval;

/**
 * Check if both stdio streams are associated with a tty.
 */

var isatty = tty.isatty(1) && tty.isatty(2);

/**
 * Expose `Base`.
 */

exports = module.exports = Base;

/**
 * Enable coloring by default, except in the browser interface.
 */

exports.useColors = process.env
  ? (supportsColor || (process.env.MOCHA_COLORS !== undefined))
  : false;

/**
 * Inline diffs instead of +/-
 */

exports.inlineDiffs = false;

/**
 * Default color map.
 */

exports.colors = {
    'pass': 90
  , 'fail': 31
  , 'bright pass': 92
  , 'bright fail': 91
  , 'bright yellow': 93
  , 'pending': 36
  , 'suite': 0
  , 'error title': 0
  , 'error message': 31
  , 'error stack': 90
  , 'checkmark': 32
  , 'fast': 90
  , 'medium': 33
  , 'slow': 31
  , 'green': 32
  , 'light': 90
  , 'diff gutter': 90
  , 'diff added': 32
  , 'diff removed': 31
};

/**
 * Default symbol map.
 */

exports.symbols = {
  ok: '✓',
  err: '✖',
  dot: '․'
};

// With node.js on Windows: use symbols available in terminal default fonts
if ('win32' == process.platform) {
  exports.symbols.ok = '\u221A';
  exports.symbols.err = '\u00D7';
  exports.symbols.dot = '.';
}

/**
 * Color `str` with the given `type`,
 * allowing colors to be disabled,
 * as well as user-defined color
 * schemes.
 *
 * @param {String} type
 * @param {String} str
 * @return {String}
 * @api private
 */

var color = exports.color = function(type, str) {
  if (!exports.useColors) return String(str);
  return '\u001b[' + exports.colors[type] + 'm' + str + '\u001b[0m';
};

/**
 * Expose term window size, with some
 * defaults for when stderr is not a tty.
 */

exports.window = {
  width: isatty
    ? process.stdout.getWindowSize
      ? process.stdout.getWindowSize(1)[0]
      : tty.getWindowSize()[1]
    : 75
};

/**
 * Expose some basic cursor interactions
 * that are common among reporters.
 */

exports.cursor = {
  hide: function(){
    isatty && process.stdout.write('\u001b[?25l');
  },

  show: function(){
    isatty && process.stdout.write('\u001b[?25h');
  },

  deleteLine: function(){
    isatty && process.stdout.write('\u001b[2K');
  },

  beginningOfLine: function(){
    isatty && process.stdout.write('\u001b[0G');
  },

  CR: function(){
    if (isatty) {
      exports.cursor.deleteLine();
      exports.cursor.beginningOfLine();
    } else {
      process.stdout.write('\r');
    }
  }
};

/**
 * Outut the given `failures` as a list.
 *
 * @param {Array} failures
 * @api public
 */

exports.list = function(failures){
  console.log();
  failures.forEach(function(test, i){
    // format
    var fmt = color('error title', '  %s) %s:\n')
      + color('error message', '     %s')
      + color('error stack', '\n%s\n');

    // msg
    var err = test.err
      , message = err.message || ''
      , stack = err.stack || message
      , index = stack.indexOf(message)
      , actual = err.actual
      , expected = err.expected
      , escape = true;
    if (index === -1) {
      msg = message;
    } else {
      index += message.length;
      msg = stack.slice(0, index);
      // remove msg from stack
      stack = stack.slice(index + 1);
    }

    // uncaught
    if (err.uncaught) {
      msg = 'Uncaught ' + msg;
    }
    // explicitly show diff
    if (err.showDiff !== false && sameType(actual, expected)
        && expected !== undefined) {

      escape = false;
      if (!(utils.isString(actual) && utils.isString(expected))) {
        err.actual = actual = utils.stringify(actual);
        err.expected = expected = utils.stringify(expected);
      }

      fmt = color('error title', '  %s) %s:\n%s') + color('error stack', '\n%s\n');
      var match = message.match(/^([^:]+): expected/);
      msg = '\n      ' + color('error message', match ? match[1] : msg);

      if (exports.inlineDiffs) {
        msg += inlineDiff(err, escape);
      } else {
        msg += unifiedDiff(err, escape);
      }
    }

    // indent stack trace
    stack = stack.replace(/^/gm, '  ');

    console.log(fmt, (i + 1), test.fullTitle(), msg, stack);
  });
};

/**
 * Initialize a new `Base` reporter.
 *
 * All other reporters generally
 * inherit from this reporter, providing
 * stats such as test duration, number
 * of tests passed / failed etc.
 *
 * @param {Runner} runner
 * @api public
 */

function Base(runner) {
  var self = this
    , stats = this.stats = { suites: 0, tests: 0, passes: 0, pending: 0, failures: 0 }
    , failures = this.failures = [];

  if (!runner) return;
  this.runner = runner;

  runner.stats = stats;

  runner.on('start', function(){
    stats.start = new Date;
  });

  runner.on('suite', function(suite){
    stats.suites = stats.suites || 0;
    suite.root || stats.suites++;
  });

  runner.on('test end', function(test){
    stats.tests = stats.tests || 0;
    stats.tests++;
  });

  runner.on('pass', function(test){
    stats.passes = stats.passes || 0;

    var medium = test.slow() / 2;
    test.speed = test.duration > test.slow()
      ? 'slow'
      : test.duration > medium
        ? 'medium'
        : 'fast';

    stats.passes++;
  });

  runner.on('fail', function(test, err){
    stats.failures = stats.failures || 0;
    stats.failures++;
    test.err = err;
    failures.push(test);
  });

  runner.on('end', function(){
    stats.end = new Date;
    stats.duration = new Date - stats.start;
  });

  runner.on('pending', function(){
    stats.pending++;
  });
}

/**
 * Output common epilogue used by many of
 * the bundled reporters.
 *
 * @api public
 */

Base.prototype.epilogue = function(){
  var stats = this.stats;
  var tests;
  var fmt;

  console.log();

  // passes
  fmt = color('bright pass', ' ')
    + color('green', ' %d passing')
    + color('light', ' (%s)');

  console.log(fmt,
    stats.passes || 0,
    ms(stats.duration));

  // pending
  if (stats.pending) {
    fmt = color('pending', ' ')
      + color('pending', ' %d pending');

    console.log(fmt, stats.pending);
  }

  // failures
  if (stats.failures) {
    fmt = color('fail', '  %d failing');

    console.log(fmt, stats.failures);

    Base.list(this.failures);
    console.log();
  }

  console.log();
};

/**
 * Pad the given `str` to `len`.
 *
 * @param {S