#!/usr/bin/env node

/**
 * Module dependencies.
 */

var program = require('commander'),
  path = require('path'),
  fs = require('fs'),
  resolve = path.resolve,
  exists = fs.existsSync || path.existsSync,
  Mocha = require('../'),
  utils = Mocha.utils,
  join = path.join,
  cwd = process.cwd(),
  getOptions = require('./options'),
  mocha = new Mocha;

/**
 * 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;

/**
 * Files.
 */

var files = [];

/**
 * Globals.
 */

var globals = [];

/**
 * Requires.
 */

var requires = [];

/**
 * Images.
 */

var images = {
    fail: __dirname + '/../images/error.png'
  , pass: __dirname + '/../images/ok.png'
};

// options

program
  .version(JSON.parse(fs.readFileSync(__dirname + '/../package.json', 'utf8')).version)
  .usage('[debug] [options] [files]')
  .option('-A, --async-only', "force all tests to take a callback (async) or return a promise")
  .option('-c, --colors', 'force enabling of colors')
  .option('-C, --no-colors', 'force disabling of colors')
  .option('-G, --growl', 'enable growl notification support')
  .option('-O, --reporter-options <k=v,k2=v2,...>', 'reporter-specific options')
  .option('-R, --reporter <name>', 'specify the reporter to use', 'spec')
  .option('-S, --sort', "sort test files")
  .option('-b, --bail', "bail after first test failure")
  .option('-d, --debug', "enable node's debugger, synonym for node --debug")
  .option('-g, --grep <pattern>', 'only run tests matching <pattern>')
  .option('-f, --fgrep <string>', 'only run tests containing <string>')
  .option('-gc, --expose-gc', 'expose gc extension')
  .option('-i, --invert', 'inverts --grep and --fgrep matches')
  .option('-r, --require <name>', 'require the given module')
  .option('-s, --slow <ms>', '"slow" test threshold in milliseconds [75]')
  .option('-t, --timeout <ms>', 'set test-case timeout in milliseconds [2000]')
  .option('-u, --ui <name>', 'specify user-interface (bdd|tdd|exports)', 'bdd')
  .option('-w, --watch', 'watch files for changes')
  .option('--check-leaks', 'check for global variable leaks')
  .option('--full-trace', 'display the full stack trace')
  .option('--compilers <ext>:<module>,...', 'use the given module(s) to compile files', list, [])
  .option('--debug-brk', "enable node's debugger breaking on the first line")
  .option('--globals <names>', 'allow the given comma-delimited global [names]', list, [])
  .option('--es_staging', 'enable all staged features')
  .option('--harmony<_classes,_generators,...>', 'all node --harmony* flags are available')
  .option('--icu-data-dir', 'include ICU data')
  .option('--inline-diffs', 'display actual/expected differences inline within each string')
  .option('--interfaces', 'display available interfaces')
  .option('--no-deprecation', 'silence deprecation warnings')
  .option('--no-exit', 'require a clean shutdown of the event loop: mocha will not call process.exit')
  .option('--no-timeouts', 'disables timeouts, given implicitly with --debug')
  .option('--opts <path>', 'specify opts path', 'test/mocha.opts')
  .option('--perf-basic-prof', 'enable perf linux profiler (basic support)')
  .option('--prof', 'log statistical profiling information')
  .option('--log-timer-events', 'Time events including external callbacks')
  .option('--recursive', 'include sub directories')
  .option('--reporters', 'display available reporters')
  .option('--retries <times>', 'set numbers of time to retry a failed test case')
  .option('--throw-deprecation', 'throw an exception anytime a deprecated function is used')
  .option('--trace', 'trace function calls')
  .option('--trace-deprecation', 'show stack traces on deprecations')
  .option('--use_strict', 'enforce strict mode')
  .option('--watch-extensions <ext>,...', 'additional extensions to monitor with --watch', list, [])
  .option('--delay', 'wait for async suite definition')

program.name = 'mocha';

// init command

program
  .command('init <path>')
  .description('initialize a client-side mocha setup at <path>')
  .action(function(path){
    var mkdir = require('mkdirp');
    mkdir.sync(path);
    var css = fs.readFileSync(join(__dirname, '..', 'mocha.css'));
    var js = fs.readFileSync(join(__dirname, '..', 'mocha.js'));
    var tmpl = fs.readFileSync(join(__dirname, '..', 'lib/template.html'));
    fs.writeFileSync(join(path, 'mocha.css'), css);
    fs.writeFileSync(join(path, 'mocha.js'), js);
    fs.writeFileSync(join(path, 'tests.js'), '');
    fs.writeFileSync(join(path, 'index.html'), tmpl);
    process.exit(0);
  });

// --globals

program.on('globals', function(val){
  globals = globals.concat(list(val));
});

// --reporters

program.on('reporters', function(){
  console.log();
  console.log('    dot - dot matrix');
  console.log('    doc - html documentation');
  console.log('    spec - hierarchical spec list');
  console.log('    json - single json object');
  console.log('    progress - progress bar');
  console.log('    list - spec-style listing');
  console.log('    tap - test-anything-protocol');
  console.log('    landing - unicode landing strip');
  console.log('    xunit - xunit reporter');
  console.log('    html-cov - HTML test coverage');
  console.log('    json-cov - JSON test coverage');
  console.log('    min - minimal reporter (great with --watch)');
  console.log('    json-stream - newline delimited json events');
  console.log('    markdown - markdown documentation (github flavour)');
  console.log('    nyan - nyan cat!');
  console.log();
  process.exit();
});

// --interfaces

program.on('interfaces', function(){
  console.log('');
  console.log('    bdd');
  console.log('    tdd');
  console.log('    qunit');
  console.log('    exports');
  console.log('');
  process.exit();
});

// -r, --require

module.paths.push(cwd, join(cwd, 'node_modules'));

program.on('require', function(mod){
  var abs = exists(mod) || exists(mod + '.js');
  if (abs) mod = resolve(mod);
  requires.push(mod);
});

// If not already done, load mocha.opts
if (!process.env.LOADED_MOCHA_OPTS) {
  getOptions();
}

// parse args

program.parse(process.argv);

// infinite stack traces

Error.stackTraceLimit = Infinity; // TODO: config

// reporter options

var reporterOptions = {};
if (program.reporterOptions !== undefined) {
    program.reporterOptions.split(",").forEach(function(opt) {
        var L = opt.split("=");
        if (L.length > 2 || L.length === 0) {
            throw new Error("invalid reporter option '" + opt + "'");
        } else if (L.length === 2) {
            reporterOptions[L[0]] = L[1];
        } else {
            reporterOptions[L[0]] = true;
        }
    });
}

// reporter

mocha.reporter(program.reporter, reporterOptions);

// load reporter

var Reporter = null;
try {
  Reporter = require('../lib/reporters/' + program.reporter);
} catch (err) {
  try {
    Reporter = require(program.reporter);
  } catch (err) {
    throw new Error('reporter "' + program.reporter + '" does not exist');
  }
}

// --no-colors

if (!program.colors) mocha.useColors(false);

// --colors

if (~process.argv.indexOf('--colors') ||
    ~process.argv.indexOf('-c')) {
  mocha.useColors(true);
}

// --inline-diffs

if (program.inlineDiffs) mocha.useInlineDiffs(true);

// --slow <ms>

if (program.slow) mocha.suite.slow(program.slow);

// --no-timeouts

if (!program.timeouts) mocha.enableTimeouts(false);

// --timeout

if (program.timeout) mocha.suite.timeout(program.timeout);

// --bail

mocha.suite.bail(program.bail);

// --grep

if (program.grep) mocha.grep(new RegExp(program.grep));

// --fgrep

if (program.fgrep) mocha.grep(program.fgrep);

// --invert

if (program.invert) mocha.invert();

// --check-leaks

if (program.checkLeaks) mocha.checkLeaks();

// --stack-trace

if(program.fullTrace) mocha.fullTrace();

// --growl

if (program.growl) mocha.growl();

// --async-only

if (program.asyncOnly) mocha.asyncOnly();

// --delay

if (program.delay) mocha.delay();

// --globals

mocha.globals(globals);

// --retries

if (program.retries) mocha.suite.retries(program.retries);

// custom compiler support

var extensions = ['js'];
program.compilers.forEach(function(c) {
  var compiler = c.split(':')
    , ext = compiler[0]
    , mod = compiler[1];

  if (mod[0] == '.') mod = join(process.cwd(), mod);
  require(mod);
  extensions.push(ext);
  program.watchExtensions.push(ext);
});

// requires

requires.forEach(function(mod) {
  require(mod);
});

// interface

mocha.ui(program.ui);

//args

var args = program.args;

// default files to test/*.{js,coffee}

if (!args.length) args.push('test');

args.forEach(function(arg){
  files = files.concat(utils.lookupFiles(arg, extensions, program.recursive));
});

// resolve

files = files.map(function(path){
  return resolve(path);
});

if (program.sort) {
  files.sort();
}

// --watch

var runner;
if (program.watch) {
  console.log();
  hideCursor();
  process.on('SIGINT', function(){
    showCursor();
    console.log('\n');
    process.exit();
  });


  var watchFiles = utils.files(cwd, [ 'js' ].concat(program.watchExtensions));
  var runAgain = false;

  function loadAndRun() {
    try {
      mocha.files = files;
      runAgain = false;
      runner = mocha.run(function(){
        runner = null;
        if (runAgain) {
          rerun();
        }
      });
    } catch(e) {
      console.log(e.stack);
    }
  }

  function purge() {
    watchFiles.forEach(function(file){
      delete require.cache[file];
    });
  }

  loadAndRun();

  function rerun() {
    purge();
    stop()
    if (!program.grep)
      mocha.grep(null);
    mocha.suite = mocha.suite.clone();
    mocha.suite.ctx = new Mocha.Context;
    mocha.ui(program.ui);
    loadAndRun();
  }

  utils.watch(watchFiles, function(){
    runAgain = true;
    if (runner) {
      runner.abort();
    } else {
      rerun();
    }
  });

} else {

// load

  mocha.files = files;
  runner = mocha.run(program.exit ? exit : exitLater);

}

function exitLater(code) {
  process.on('exit', function() { process.exit(code) })
}

function exit(code) {
  // flush output for Node.js Windows pipe bug
  // https://github.com/joyent/node/issues/6247 is just one bug example
  // https://github.com/visionmedia/mocha/issues/333 has a good discussion
  function done() {
    if (!(draining--)) process.exit(code);
  }

  var draining = 0;
  var streams = [process.stdout, process.stderr];

  streams.forEach(function(stream){
    // submit empty write request and wait for completion
    draining += 1;
    stream.write('', done);
  });

  done();
}

process.on('SIGINT', function() { runner.abort(); })

/**
 * Parse list.
 */

function list(str) {
  return str.split(/ *, */);
}

/**
 * Hide the cursor.
 */

function hideCursor(){
  process.stdout.write('\u001b[?25l');
}

/**
 * Show the cursor.
 */

function showCursor(){
  process.stdout.write('\u001b[?25h');
}

/**
 * Stop play()ing.
 */

function stop() {
  process.stdout.write('\u001b[2K');
  clearInterval(play.timer);
}

/**
 * Play the given array of strings.
 */

function play(arr, interval) {
  var len = arr.length
    , interval = interval || 100
    , i = 0;

  play.timer = setInterval(function(){
    var str = arr[i++ % len];
    process.stdout.write('\u001b[0G' + str);
  }, interval);
}
