"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); /**
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * Copyright (c) 2017-present, Facebook, Inc.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * All rights reserved.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          *
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * This source code is licensed under the BSD-style license found in the
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * LICENSE file in the root directory of this source tree. An additional grant
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * of patent rights can be found in the PATENTS file in the same directory.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          */

exports.default = function (ast, strictCode, env, realm) {
  var _env$partiallyEvaluat = env.partiallyEvaluateCompletionDeref(ast.test, strictCode),
      _env$partiallyEvaluat2 = _slicedToArray(_env$partiallyEvaluat, 3),
      exprValue = _env$partiallyEvaluat2[0],
      exprAst = _env$partiallyEvaluat2[1],
      exprIO = _env$partiallyEvaluat2[2];

  if (exprValue instanceof _completions.AbruptCompletion) return [exprValue, t.expressionStatement(exprAst), exprIO];
  var completion = void 0;
  if (exprValue instanceof _completions.PossiblyNormalCompletion) {
    completion = exprValue;
    exprValue = completion.value;
  }
  (0, _invariant2.default)(exprValue instanceof _index2.Value);

  if (!exprValue.mightNotBeTrue()) {
    // 3.a. Let stmtCompletion be the result of evaluating the first Statement
    var _env$partiallyEvaluat3 = env.partiallyEvaluateCompletionDeref(ast.consequent, strictCode),
        _env$partiallyEvaluat4 = _slicedToArray(_env$partiallyEvaluat3, 3),
        stmtCompletion = _env$partiallyEvaluat4[0],
        stmtAst = _env$partiallyEvaluat4[1],
        stmtIO = _env$partiallyEvaluat4[2];

    // 5. Return Completion(UpdateEmpty(stmtCompletion, undefined)


    stmtCompletion = (0, _index.UpdateEmpty)(realm, stmtCompletion, realm.intrinsics.undefined);
    return [stmtCompletion, stmtAst, exprIO.concat(stmtIO)];
  } else if (!exprValue.mightNotBeFalse()) {
    var _stmtCompletion = void 0,
        _stmtAst = void 0,
        _stmtIO = void 0;
    if (ast.alternate) {
      // 4.a. Let stmtCompletion be the result of evaluating the second Statement
      ;

      var _env$partiallyEvaluat5 = env.partiallyEvaluateCompletionDeref(ast.alternate, strictCode);

      var _env$partiallyEvaluat6 = _slicedToArray(_env$partiallyEvaluat5, 3);

      _stmtCompletion = _env$partiallyEvaluat6[0];
      _stmtAst = _env$partiallyEvaluat6[1];
      _stmtIO = _env$partiallyEvaluat6[2];
    } else {
      // 3 (of the if only statement). Return NormalCompletion(undefined)
      _stmtCompletion = realm.intrinsics.undefined;
      _stmtAst = t.emptyStatement();
      _stmtIO = [];
    }
    // 5. Return Completion(UpdateEmpty(stmtCompletion, undefined)
    _stmtCompletion = (0, _index.UpdateEmpty)(realm, _stmtCompletion, realm.intrinsics.undefined);
    return [_stmtCompletion, _stmtAst, exprIO.concat(_stmtIO)];
  }
  (0, _invariant2.default)(exprValue instanceof _index2.AbstractValue);

  // Evaluate consequent and alternate in sandboxes and get their effects.

  var _realm$partiallyEvalu = realm.partiallyEvaluateNodeForEffects(ast.consequent, strictCode, env),
      _realm$partiallyEvalu2 = _slicedToArray(_realm$partiallyEvalu, 3),
      consequentEffects = _realm$partiallyEvalu2[0],
      conAst = _realm$partiallyEvalu2[1],
      conIO = _realm$partiallyEvalu2[2];

  var _consequentEffects = _slicedToArray(consequentEffects, 5),
      conCompl = _consequentEffects[0],
      gen1 = _consequentEffects[1],
      bindings1 = _consequentEffects[2],
      properties1 = _consequentEffects[3],
      createdObj1 = _consequentEffects[4];

  var consequentAst = conAst;
  if (conIO.length > 0) consequentAst = t.blockStatement(conIO.concat(consequentAst));

  var _ref = ast.alternate ? realm.partiallyEvaluateNodeForEffects(ast.alternate, strictCode, env) : [(0, _realm.construct_empty_effects)(realm), undefined, []],
      _ref2 = _slicedToArray(_ref, 3),
      alternateEffects = _ref2[0],
      altAst = _ref2[1],
      altIO = _ref2[2];

  var _alternateEffects = _slicedToArray(alternateEffects, 5),
      altCompl = _alternateEffects[0],
      gen2 = _alternateEffects[1],
      bindings2 = _alternateEffects[2],
      properties2 = _alternateEffects[3],
      createdObj2 = _alternateEffects[4];

  var alternateAst = altAst;
  if (altIO.length > 0) alternateAst = t.blockStatement(altIO.concat(alternateAst));

  // Join the effects, creating an abstract view of what happened, regardless
  // of the actual value of exprValue.
  var joinedEffects = _singletons.Join.joinEffects(realm, exprValue, [conCompl, gen1, bindings1, properties1, createdObj1], [altCompl, gen2, bindings2, properties2, createdObj2]);
  completion = joinedEffects[0];
  if (completion instanceof _completions.PossiblyNormalCompletion) {
    // in this case one of the branches may complete abruptly, which means that
    // not all control flow branches join into one flow at this point.
    // Consequently we have to continue tracking changes until the point where
    // all the branches come together into one.
    realm.captureEffects(completion);
  }
  // Note that the effects of (non joining) abrupt branches are not included
  // in joinedEffects, but are tracked separately inside completion.
  realm.applyEffects(joinedEffects);

  var resultAst = t.ifStatement(exprAst, consequentAst, alternateAst);
  (0, _invariant2.default)(!(completion instanceof _environment.Reference));
  return [completion, resultAst, exprIO];
};

var _completions = require("../completions.js");

var _environment = require("../environment.js");

var _index = require("../methods/index.js");

var _index2 = require("../values/index.js");

var _realm = require("../realm.js");

var _singletons = require("../singletons.js");

var _babelTypes = require("babel-types");

var t = _interopRequireWildcard(_babelTypes);

var _invariant = require("../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
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