'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.install = install;

var _isGeneratorFn = require('is-generator-fn');

var _isGeneratorFn2 = _interopRequireDefault(_isGeneratorFn);

var _co = require('co');

var _co2 = _interopRequireDefault(_co);

var _is_error = require('./is_error');

var _is_error2 = _interopRequireDefault(_is_error);

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

/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *
 */

/**
 * This module adds ability to test async promise code with jasmine by
 * returning a promise from `it/test` and `before/afterEach/All` blocks.
 */

function isPromise(obj) {
  return obj && typeof obj.then === 'function';
}

function promisifyLifeCycleFunction(originalFn, env) {
  return function(fn, timeout) {
    if (!fn) {
      return originalFn.call(env);
    }

    const hasDoneCallback = fn.length > 0;

    if (hasDoneCallback) {
      // Jasmine will handle it
      return originalFn.call(env, fn, timeout);
    }

    const extraError = new Error();

    // We make *all* functions async and run `done` right away if they
    // didn't return a promise.
    const asyncJestLifecycle = function(done) {
      const wrappedFn = (0, _isGeneratorFn2.default)(fn)
        ? _co2.default.wrap(fn)
        : fn;
      const returnValue = wrappedFn.call({});

      if (isPromise(returnValue)) {
        returnValue.then(done.bind(null, null), error => {
          var _checkIsError = (0, _is_error2.default)(error);

          const isError = _checkIsError.isError,
            message = _checkIsError.message;

          if (message) {
            extraError.message = message;
          }
          done.fail(isError ? error : extraError);
        });
      } else {
        done();
      }
    };

    return originalFn.call(env, asyncJestLifecycle, timeout);
  };
}

// Similar to promisifyLifeCycleFunction but throws an error
// when the return value is neither a Promise nor `undefined`
function promisifyIt(originalFn, env) {
  return function(specName, fn, timeout) {
    if (!fn) {
      const spec = originalFn.call(env, specName);
      spec.pend('not implemented');
      return spec;
    }

    const hasDoneCallback = fn.length > 0;

    if (hasDoneCallback) {
      return originalFn.call(env, specName, fn, timeout);
    }

    const extraError = new Error();

    const asyncJestTest = function(done) {
      const wrappedFn = (0, _isGeneratorFn2.default)(fn)
        ? _co2.default.wrap(fn)
        : fn;
      const returnValue = wrappedFn.call({});

      if (isPromise(returnValue)) {
        returnValue.then(done.bind(null, null), error => {
          var _checkIsError2 = (0, _is_error2.default)(error);

          const isError = _checkIsError2.isError,
            message = _checkIsError2.message;

          if (message) {
            extraError.message = message;
          }
          done.fail(isError ? error : extraError);
        });
      } else if (returnValue === undefined) {
        done();
      } else {
        done.fail(
          new Error(
            'Jest: `it` and `test` must return either a Promise or undefined.'
          )
        );
      }
    };

    return originalFn.call(env, specName, asyncJestTest, timeout);
  };
}

function makeConcurrent(originalFn, env) {
  return function(specName, fn, timeout) {
    if (env != null && !env.specFilter({getFullName: () => specName || ''})) {
      return originalFn.call(env, specName, () => Promise.resolve(), timeout);
    }

    let promise;

    try {
      promise = fn();
      if (!isPromise(promise)) {
        throw new Error(
          `Jest: concurrent test "${specName}" must return a Promise.`
        );
      }
    } catch (error) {
      return originalFn.call(env, specName, () => Promise.reject(error));
    }

    return originalFn.call(env, specName, () => promise, timeout);
  };
}

function install(global) {
  const jasmine = global.jasmine;

  const env = jasmine.getEnv();
  env.it = promisifyIt(env.it, env);
  env.fit = promisifyIt(env.fit, env);
  global.it.concurrent = makeConcurrent(env.it, env);
  global.it.concurrent.only = makeConcurrent(env.fit, env);
  global.it.concurrent.skip = makeConcurrent(env.xit, env);
  global.fit.concurrent = makeConcurrent(env.fit);
  env.afterAll = promisifyLifeCycleFunction(env.afterAll, env);
  env.afterEach = promisifyLifeCycleFunction(env.afterEach, env);
  env.beforeAll = promisifyLifeCycleFunction(env.beforeAll, env);
  env.beforeEach = promisifyLifeCycleFunction(env.beforeEach, env);
}