// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

import app from "../../app";
import FauxtonAPI from "../../core/api";
import Constants from "./constants";
import VerifyInstall from "./resources";
import ActionTypes from "./actiontypes";


// helper function to publish success/fail result of a single test having been ran
var testPassed = function (test) {
  FauxtonAPI.dispatch({
    type: ActionTypes.VERIFY_INSTALL_SINGLE_TEST_COMPLETE,
    test: test,
    success: true
  });
};

var testFailed = function (test) {
  return function (xhr, error) {
    if (!xhr) { return; }

    FauxtonAPI.dispatch({
      type: ActionTypes.VERIFY_INSTALL_SINGLE_TEST_COMPLETE,
      test: test,
      success: false
    });

    FauxtonAPI.addNotification({
      msg: 'Error: ' + JSON.parse(xhr.responseText).reason,
      type: 'error'
    });
  };
};


export default {
  resetStore: function () {
    FauxtonAPI.dispatch({ type: ActionTypes.VERIFY_INSTALL_RESET });
  },

  startVerification: function () {

    // announce that we're starting the verification tests
    FauxtonAPI.dispatch({ type: ActionTypes.VERIFY_INSTALL_START });

    var testProcess = VerifyInstall.testProcess;

    testProcess.setup()
      .then(function () {
        return testProcess.saveDB();
      }, testFailed(Constants.TESTS.CREATE_DATABASE))
      .then(function () {
        testPassed(Constants.TESTS.CREATE_DATABASE);
        return testProcess.saveDoc();
      }, testFailed(Constants.TESTS.CREATE_DOCUMENT))
      .then(function () {
        testPassed(Constants.TESTS.CREATE_DOCUMENT);
        return testProcess.updateDoc();
      }, testFailed(Constants.TESTS.UPDATE_DOCUMENT))
      .then(function () {
        testPassed(Constants.TESTS.UPDATE_DOCUMENT);
        return testProcess.destroyDoc();
      }, testFailed(Constants.TESTS.DELETE_DOCUMENT))
      .then(function () {
        testPassed(Constants.TESTS.DELETE_DOCUMENT);
        return testProcess.setupView();
      }, testFailed(Constants.TESTS.CREATE_VIEW))
      .then(function () {
        return testProcess.testView();
      }, testFailed(Constants.TESTS.CREATE_VIEW))
      .then(function () {
        testPassed(Constants.TESTS.CREATE_VIEW);
        return testProcess.setupReplicate();
      }, testFailed(Constants.TESTS.CREATE_VIEW))
      .then(function () {
        return testProcess.testReplicate();
      }, testFailed(Constants.TESTS.REPLICATION))
      .then(function () {
        testPassed(Constants.TESTS.REPLICATION);

        // now announce the tests have been ran
        FauxtonAPI.dispatch({ type: ActionTypes.VERIFY_INSTALL_ALL_TESTS_COMPLETE });

        FauxtonAPI.addNotification({
          msg: 'Success! Your CouchDB installation is working. Time to Relax.',
          type: 'success'
        });

        testProcess.removeDBs();
      }, testFailed(Constants.TESTS.REPLICATION));
  }
};