getJasmineRequireObj().Env = function(j$) {
  function Env(options) {
    options = options || {};

    var self = this;
    var global = options.global || j$.getGlobal();

    var totalSpecsDefined = 0;

    var catchExceptions = true;

    var realSetTimeout = j$.getGlobal().setTimeout;
    var realClearTimeout = j$.getGlobal().clearTimeout;
    this.clock = new j$.Clock(global, new j$.DelayedFunctionScheduler(), new j$.MockDate(global));

    var runnableLookupTable = {};

    var spies = [];

    var currentSpec = null;
    var currentSuite = null;

    var reporter = new j$.ReportDispatcher([
      'jasmineStarted',
      'jasmineDone',
      'suiteStarted',
      'suiteDone',
      'specStarted',
      'specDone'
    ]);

    this.specFilter = function() {
      return true;
    };

    var equalityTesters = [];

    var customEqualityTesters = [];
    this.addCustomEqualityTester = function(tester) {
      customEqualityTesters.push(tester);
    };

    j$.Expectation.addCoreMatchers(j$.matchers);

    var nextSpecId = 0;
    var getNextSpecId = function() {
      return 'spec' + nextSpecId++;
    };

    var nextSuiteId = 0;
    var getNextSuiteId = function() {
      return 'suite' + nextSuiteId++;
    };

    var expectationFactory = function(actual, spec) {
      return j$.Expectation.Factory({
        util: j$.matchersUtil,
        customEqualityTesters: customEqualityTesters,
        actual: actual,
        addExpectationResult: addExpectationResult
      });

      function addExpectationResult(passed, result) {
        return spec.addExpectationResult(passed, result);
      }
    };

    var specStarted = function(spec) {
      currentSpec = spec;
      reporter.specStarted(spec.result);
    };

    var beforeFns = function(suite) {
      return function() {
        var befores = [];
        while(suite) {
          befores = befores.concat(suite.beforeFns);
          suite = suite.parentSuite;
        }
        return befores.reverse();
      };
    };

    var afterFns = function(suite) {
      return function() {
        var afters = [];
        while(suite) {
          afters = afters.concat(suite.afterFns);
          suite = suite.parentSuite;
        }
        return afters;
      };
    };

    var getSpecName = function(spec, suite) {
      return suite.getFullName() + ' ' + spec.description;
    };

    // TODO: we may just be able to pass in the fn instead of wrapping here
    var buildExpectationResult = j$.buildExpectationResult,
        exceptionFormatter = new j$.ExceptionFormatter(),
        expectationResultFactory = function(attrs) {
          attrs.messageFormatter = exceptionFormatter.message;
          attrs.stackFormatter = exceptionFormatter.stack;

          return buildExpectationResult(attrs);
        };

    // TODO: fix this naming, and here's where the value comes in
    this.catchExceptions = function(value) {
      catchExceptions = !!value;
      return catchExceptions;
    };

    this.catchingExceptions = function() {
      return catchExceptions;
    };

    var maximumSpecCallbackDepth = 20;
    var currentSpecCallbackDepth = 0;

    function clearStack(fn) {
      currentSpecCallbackDepth++;
      if (currentSpecCallbackDepth >= maximumSpecCallbackDepth) {
        currentSpecCallbackDepth = 0;
        realSetTimeout(fn, 0);
      } else {
        fn();
      }
    }

    var catchException = function(e) {
      return j$.Spec.isPendingSpecException(e) || catchExceptions;
    };

    var queueRunnerFactory = function(options) {
      options.catchException = catchException;
      options.clearStack = options.clearStack || clearStack;
      options.timer = {setTimeout: realSetTimeout, clearTimeout: realClearTimeout};

      new j$.QueueRunner(options).execute();
    };

    var topSuite = new j$.Suite({
      env: this,
      id: getNextSuiteId(),
      description: 'Jasmine__TopLevel__Suite',
      queueRunner: queueRunnerFactory,
      resultCallback: function() {} // TODO - hook this up
    });
    runnableLookupTable[topSuite.id] = topSuite;
    currentSuite = topSuite;

    this.topSuite = function() {
      return topSuite;
    };

    this.execute = function(runnablesToRun) {
      runnablesToRun = runnablesToRun || [topSuite.id];

      var allFns = [];
      for(var i = 0; i < runnablesToRun.length; i++) {
        var runnable = runnableLookupTable[runnablesToRun[i]];
        allFns.push((function(runnable) { return function(done) { runnable.execute(done); }; })(runnable));
      }

      reporter.jasmineStarted({
        totalSpecsDefined: totalSpecsDefined
      });

      queueRunnerFactory({fns: allFns, onComplete: reporter.jasmineDone});
    };

    this.addReporter = function(reporterToAdd) {
      reporter.addReporter(reporterToAdd);
    };

    this.addMatchers = function(matchersToAdd) {
      j$.Expectation.addMatchers(matchersToAdd);
    };

    this.spyOn = function(obj, methodName) {
      if (j$.util.isUndefined(obj)) {
        throw new Error('spyOn could not find an object to spy upon for ' + methodName + '()');
      }

      if (j$.util.isUndefined(obj[methodName])) {
        throw new Error(methodName + '() method does not exist');
      }

      if (obj[methodName] && j$.isSpy(obj[methodName])) {
        //TODO?: should this return the current spy? Downside: may cause user confusion about spy state
        throw new Error(methodName + ' has already been spied upon');
      }

      var spy = j$.createSpy(methodName, obj[methodName]);

      spies.push({
        spy: spy,
        baseObj: obj,
        methodName: methodName,
        originalValue: obj[methodName]
      });

      obj[methodName] = spy;

      return spy;
    };

    var suiteFactory = function(description) {
      var suite = new j$.Suite({
        env: self,
        id: getNextSuiteId(),
        description: description,
        parentSuite: currentSuite,
        queueRunner: queueRunnerFactory,
        onStart: suiteStarted,
        resultCallback: function(attrs) {
          reporter.suiteDone(attrs);
        }
      });

      runnableLookupTable[suite.id] = suite;
      return suite;
    };

    this.describe = function(description, specDefinitions) {
      var suite = suiteFactory(description);

      var parentSuite = currentSuite;
      parentSuite.addChild(suite);
      currentSuite = suite;

      var declarationError = null;
      try {
        specDefinitions.call(suite);
      } catch (e) {
        declarationError = e;
      }

      if (declarationError) {
        this.it('encountered a declaration exception', function() {
          throw declarationError;
        });
      }

      currentSuite = parentSuite;

      return suite;
    };

    this.xdescribe = function(description, specDefinitions) {
      var suite = this.describe(description, specDefinitions);
      suite.disable();
      return suite;
    };

    var specFactory = function(description, fn, suite) {
      totalSpecsDefined++;

      var spec = new j$.Spec({
        id: getNextSpecId(),
        beforeFns: beforeFns(suite),
        afterFns: afterFns(suite),
        expectationFactory: expectationFactory,
        exceptionFormatter: exceptionFormatter,
        resultCallback: specResultCallback,
        getSpecName: function(spec) {
          return getSpecName(spec, suite);
        },
        onStart: specStarted,
        description: description,
        expectationResultFactory: expectationResultFactory,
        queueRunnerFactory: queueRunnerFactory,
        fn: fn
      });

      runnableLookupTable[spec.id] = spec;

      if (!self.specFilter(spec)) {
        spec.disable();
      }

      return spec;

      function removeAllSpies() {
        for (var i = 0; i < spies.length; i++) {
          var spyEntry = spies[i];
          spyEntry.baseObj[spyEntry.methodName] = spyEntry.originalValue;
        }
        spies = [];
      }

      function specResultCallback(result) {
        removeAllSpies();
        j$.Expectation.resetMatchers();
        customEqualityTesters = [];
        currentSpec = null;
        reporter.specDone(result);
      }
    };

    var suiteStarted = function(suite) {
      reporter.suiteStarted(suite.result);
    };

    this.it = function(description, fn) {
      var spec = specFactory(description, fn, currentSuite);
      currentSuite.addChild(spec);
      return spec;
    };

    this.xit = function(description, fn) {
      var spec = this.it(description, fn);
      spec.pend();
      return spec;
    };

    this.expect = function(actual) {
      if (!currentSpec) {
        throw new Error('\'expect\' was used when there was no current spec, this could be because an asynchronous test timed out');
      }

      return currentSpec.expect(actual);
    };

    this.beforeEach = function(beforeEachFunction) {
      currentSuite.beforeEach(beforeEachFunction);
    };

    this.afterEach = function(afterEachFunction) {
      currentSuite.afterEach(afterEachFunction);
    };

    this.pending = function() {
      throw j$.Spec.pendingSpecExceptionMessage;
    };
  }

  return Env;
};