/**
 * @constructor
 * @param {jasmine.Env} env
 * @param actual
 * @param {jasmine.Spec} spec
 */
jasmine.Matchers = function(env, actual, spec) {
  this.env = env;
  this.actual = actual;
  this.spec = spec;
};

jasmine.Matchers.pp = function(str) {
  return jasmine.util.htmlEscape(jasmine.pp(str));
};

jasmine.Matchers.prototype.report = function(result, failing_message, details) {
  var expectationResult = new jasmine.ExpectationResult({
    passed: result,
    message: failing_message,
    details: details
  });
  this.spec.addMatcherResult(expectationResult);
  return result;
};

jasmine.Matchers.matcherFn_ = function(matcherName, options) {
  return function () {
    jasmine.util.extend(this, options);
    var matcherArgs = jasmine.util.argsToArray(arguments);
    var result = options.test.apply(this, arguments);
    var message;
    if (!result) {
      if (options.message) {
        message = options.message.apply(this, arguments);
      } else {
        var englishyPredicate = matcherName.replace(/[A-Z]/g, function(s) { return ' ' + s.toLowerCase(); });
        message = "Expected " + jasmine.pp(this.actual) + " " + englishyPredicate;
        if (matcherArgs.length > 0) {
          for (var i = 0; i < matcherArgs.length; i++) {
            if (i > 0) message += ",";
            message += " " + jasmine.pp(matcherArgs[i]);
          }
        }
        message += ".";
      }
    }
    var expectationResult = new jasmine.ExpectationResult({
      matcherName: matcherName,
      passed: result,
      expected: matcherArgs.length > 1 ? matcherArgs : matcherArgs[0],
      actual: this.actual,
      message: message
    });
    this.spec.addMatcherResult(expectationResult);
    return result;
  };
};




/**
 * toBe: compares the actual to the expected using ===
 * @param expected
 */

jasmine.Matchers.prototype.toBe = jasmine.Matchers.matcherFn_('toBe', {
  test: function(expected) {
    return this.actual === expected;
  }
});

/**
 * toNotBe: compares the actual to the expected using !==
 * @param expected
 */
jasmine.Matchers.prototype.toNotBe = jasmine.Matchers.matcherFn_('toNotBe', {
  test: function(expected) {
    return this.actual !== expected;
  }
});

/**
 * toEqual: compares the actual to the expected using common sense equality. Handles Objects, Arrays, etc.
 *
 * @param expected
 */

jasmine.Matchers.prototype.toEqual = jasmine.Matchers.matcherFn_('toEqual', {
  test: function(expected) {
    return this.env.equals_(this.actual, expected);
  }
});

/**
 * toNotEqual: compares the actual to the expected using the ! of jasmine.Matchers.toEqual
 * @param expected
 */
jasmine.Matchers.prototype.toNotEqual = jasmine.Matchers.matcherFn_('toNotEqual', {
  test: function(expected) {
    return !this.env.equals_(this.actual, expected);
  }
});

/**
 * Matcher that compares the actual to the expected using a regular expression.  Constructs a RegExp, so takes
 * a pattern or a String.
 *
 * @param reg_exp
 */
jasmine.Matchers.prototype.toMatch = jasmine.Matchers.matcherFn_('toMatch', {
  test: function(expected) {
    return new RegExp(expected).test(this.actual);
  }
});

/**
 * Matcher that compares the actual to the expected using the boolean inverse of jasmine.Matchers.toMatch
 * @param reg_exp
 */
jasmine.Matchers.prototype.toNotMatch = jasmine.Matchers.matcherFn_('toNotMatch', {
  test: function(expected) {
    return !(new RegExp(expected).test(this.actual));
  }
});

/**
 * Matcher that compares the actual to undefined.
 */
jasmine.Matchers.prototype.toBeDefined = jasmine.Matchers.matcherFn_('toBeDefined', {
  test: function() {
    return (this.actual !== undefined);
  }
});

/**
 * Matcher that compares the actual to undefined.
 */
jasmine.Matchers.prototype.toBeUndefined = jasmine.Matchers.matcherFn_('toBeUndefined', {
  test: function() {
    return (this.actual === undefined);
  }
});

/**
 * Matcher that compares the actual to null.
 */
jasmine.Matchers.prototype.toBeNull = jasmine.Matchers.matcherFn_('toBeNull', {
  test: function() {
    return (this.actual === null);
  }
});

/**
 * Matcher that boolean not-nots the actual.
 */
jasmine.Matchers.prototype.toBeTruthy = jasmine.Matchers.matcherFn_('toBeTruthy', {
  test: function() {
    return !!this.actual;
  }
});


/**
 * Matcher that boolean nots the actual.
 */
jasmine.Matchers.prototype.toBeFalsy = jasmine.Matchers.matcherFn_('toBeFalsy', {
  test: function() {
    return !this.actual;
  }
});

/**
 * Matcher that checks to see if the actual, a Jasmine spy, was called.
 */

jasmine.Matchers.prototype.wasCalled = jasmine.Matchers.matcherFn_('wasCalled', {
  test: function() {
    if (arguments.length > 0) {
      throw new Error('wasCalled does not take arguments, use wasCalledWith');
    }

    if (!jasmine.isSpy(this.actual)) {
      throw new Error('Expected a spy, but got ' + jasmine.Matchers.pp(this.actual) + '.');
    }

    return this.actual.wasCalled;
  },
  message: function() {
    return "Expected spy " + this.actual.identity + " to have been called.";
  }
});

/**
 * Matcher that checks to see if the actual, a Jasmine spy, was not called.
 */
jasmine.Matchers.prototype.wasNotCalled = jasmine.Matchers.matcherFn_('wasNotCalled', {
  test: function() {
    if (arguments.length > 0) {
      throw new Error('wasNotCalled does not take arguments');
    }

    if (!jasmine.isSpy(this.actual)) {
      throw new Error('Expected a spy, but got ' + jasmine.Matchers.pp(this.actual) + '.');
    }

    return !this.actual.wasCalled;
  },
  message: function() {
    return "Expected spy " + this.actual.identity + " to not have been called.";
  }
});

jasmine.Matchers.prototype.wasCalledWith = jasmine.Matchers.matcherFn_('wasCalledWith', {
  test: function() {
    if (!jasmine.isSpy(this.actual)) {
      throw new Error('Expected a spy, but got ' + jasmine.Matchers.pp(this.actual) + '.');
    }

    return this.env.contains_(this.actual.argsForCall, jasmine.util.argsToArray(arguments));
  },
  message: function() {
    return "Expected spy to have been called with " + jasmine.pp(arguments) + " but was called with " + this.actual.argsForCall;
  }
});

/**
 * Matcher that checks to see if the actual, a Jasmine spy, was called with a set of parameters.
 *
 * @example
 *
 */

/**
 * Matcher that checks that the expected item is an element in the actual Array.
 *
 * @param {Object} item
 */

jasmine.Matchers.prototype.toContain = jasmine.Matchers.matcherFn_('toContain', {
  test: function(expected) {
    return this.env.contains_(this.actual, expected);
  }
});

/**
 * Matcher that checks that the expected item is NOT an element in the actual Array.
 *
 * @param {Object} item
 */
jasmine.Matchers.prototype.toNotContain = jasmine.Matchers.matcherFn_('toNotContain', {
  test: function(expected) {
    return !this.env.contains_(this.actual, expected);
  }
});

jasmine.Matchers.prototype.toBeLessThan = jasmine.Matchers.matcherFn_('toBeLessThan', {
  test: function(expected) {
    return this.actual < expected;
  }
});

jasmine.Matchers.prototype.toBeGreaterThan = jasmine.Matchers.matcherFn_('toBeGreaterThan', {
  test: function(expected) {
    return this.actual > expected;
  }
});

/**
 * Matcher that checks that the expected exception was thrown by the actual.
 *
 * @param {String} expectedException
 */
jasmine.Matchers.prototype.toThrow = jasmine.Matchers.matcherFn_('toThrow', {
  getException_: function(actual, expected) {
    var exception;
    if (typeof actual != 'function') {
      throw new Error('Actual is not a function');
    }
    try {
      actual();
    } catch (e) {
      exception = e;
    }
    return exception;
  },
  test: function(expected) {
    var result = false;
    var exception = this.getException_(this.actual, expected);
    if (exception) {
      result = (expected === undefined || this.env.equals_(exception.message || exception, expected.message || expected));
    }
    return result;
  },
  message: function(expected) {
    var exception = this.getException_(this.actual, expected);
    if (exception && (expected === undefined || !this.env.equals_(exception.message || exception, expected.message || expected))) {
      return ["Expected function to throw", expected.message || expected, ", but it threw", exception.message || exception  ].join(' ');
    } else {
      return "Expected function to throw an exception.";
    }
  }
});

jasmine.Matchers.Any = function(expectedClass) {
  this.expectedClass = expectedClass;
};

jasmine.Matchers.Any.prototype.matches = function(other) {
  if (this.expectedClass == String) {
    return typeof other == 'string' || other instanceof String;
  }

  if (this.expectedClass == Number) {
    return typeof other == 'number' || other instanceof Number;
  }

  if (this.expectedClass == Function) {
    return typeof other == 'function' || other instanceof Function;
  }

  if (this.expectedClass == Object) {
    return typeof other == 'object';
  }

  return other instanceof this.expectedClass;
};

jasmine.Matchers.Any.prototype.toString = function() {
  return '<jasmine.any(' + this.expectedClass + ')>';
};