/**
 * @license
 * Copyright (C) 2019 The Android Open Source Project
 *
 * 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 '../../test/common-test-setup-karma.js';
import {GrReviewerSuggestionsProvider, SUGGESTIONS_PROVIDERS_USERS_TYPES} from './gr-reviewer-suggestions-provider.js';
import {getAppContext} from '../../services/app-context.js';
import {stubRestApi} from '../../test/test-utils.js';

suite('GrReviewerSuggestionsProvider tests', () => {
  let _nextAccountId = 0;
  const makeAccount = function(opt_status) {
    const accountId = ++_nextAccountId;
    return {
      _account_id: accountId,
      name: 'name ' + accountId,
      email: 'email ' + accountId,
      status: opt_status,
    };
  };
  let _nextAccountId2 = 0;
  const makeAccount2 = function(opt_status) {
    const accountId2 = ++_nextAccountId2;
    return {
      _account_id: accountId2,
      name: 'name ' + accountId2,
      status: opt_status,
    };
  };

  let owner;
  let existingReviewer1;
  let existingReviewer2;
  let suggestion1;
  let suggestion2;
  let suggestion3;
  let provider;

  let redundantSuggestion1;
  let redundantSuggestion2;
  let redundantSuggestion3;
  let change;

  setup(async () => {
    owner = makeAccount();
    existingReviewer1 = makeAccount();
    existingReviewer2 = makeAccount();
    suggestion1 = {account: makeAccount()};
    suggestion2 = {account: makeAccount()};
    suggestion3 = {
      group: {
        id: 'suggested group id',
        name: 'suggested group',
      },
    };

    stubRestApi('getConfig').returns(Promise.resolve({}));

    change = {
      _number: 42,
      owner,
      reviewers: {
        CC: [existingReviewer1],
        REVIEWER: [existingReviewer2],
      },
    };

    await flush();
  });

  suite('allowAnyUser set to false', () => {
    setup(async () => {
      provider = GrReviewerSuggestionsProvider.create(
          getAppContext().restApiService, change._number,
          SUGGESTIONS_PROVIDERS_USERS_TYPES.REVIEWER);
      await provider.init();
    });
    suite('stubbed values for _getReviewerSuggestions', () => {
      let getChangeSuggestedReviewersStub;
      setup(() => {
        getChangeSuggestedReviewersStub =
            stubRestApi('getChangeSuggestedReviewers').callsFake(() => {
              redundantSuggestion1 = {account: existingReviewer1};
              redundantSuggestion2 = {account: existingReviewer2};
              redundantSuggestion3 = {account: owner};
              return Promise.resolve([
                redundantSuggestion1, redundantSuggestion2,
                redundantSuggestion3, suggestion1, suggestion2, suggestion3]);
            });
      });

      test('makeSuggestionItem formats account or group accordingly', () => {
        let account = makeAccount();
        const account3 = makeAccount2();
        let suggestion = provider.makeSuggestionItem({account});
        assert.deepEqual(suggestion, {
          name: account.name + ' <' + account.email + '>',
          value: {account},
        });

        const group = {name: 'test'};
        suggestion = provider.makeSuggestionItem({group});
        assert.deepEqual(suggestion, {
          name: group.name + ' (group)',
          value: {group},
        });

        suggestion = provider.makeSuggestionItem(account);
        assert.deepEqual(suggestion, {
          name: account.name + ' <' + account.email + '>',
          value: {account, count: 1},
        });

        suggestion = provider.makeSuggestionItem({account: {}});
        assert.deepEqual(suggestion, {
          name: 'Anonymous',
          value: {account: {}},
        });

        provider.config = {
          user: {
            anonymous_coward_name: 'Anonymous Coward Name',
          },
        };

        suggestion = provider.makeSuggestionItem({account: {}});
        assert.deepEqual(suggestion, {
          name: 'Anonymous Coward Name',
          value: {account: {}},
        });

        account = makeAccount('OOO');

        suggestion = provider.makeSuggestionItem({account});
        assert.deepEqual(suggestion, {
          name: account.name + ' <' + account.email + '> (OOO)',
          value: {account},
        });

        suggestion = provider.makeSuggestionItem(account);
        assert.deepEqual(suggestion, {
          name: account.name + ' <' + account.email + '> (OOO)',
          value: {account, count: 1},
        });

        account3.email = undefined;

        suggestion = provider.makeSuggestionItem(account3);
        assert.deepEqual(suggestion, {
          name: account3.name,
          value: {account: account3, count: 1},
        });
      });

      test('getSuggestions', async () => {
        const reviewers = await provider.getSuggestions();

        // Default is no filtering.
        assert.equal(reviewers.length, 6);
        assert.deepEqual(reviewers,
            [redundantSuggestion1, redundantSuggestion2,
              redundantSuggestion3, suggestion1,
              suggestion2, suggestion3]);
      });

      test('getSuggestions short circuits when logged out', () => {
        provider.loggedIn = false;
        return provider.getSuggestions('').then(() => {
          assert.isFalse(getChangeSuggestedReviewersStub.called);
          provider.loggedIn = true;
          return provider.getSuggestions('').then(() => {
            assert.isTrue(getChangeSuggestedReviewersStub.called);
          });
        });
      });
    });

    test('getChangeSuggestedReviewers is used', async () => {
      const suggestReviewerStub = stubRestApi('getChangeSuggestedReviewers')
          .returns(Promise.resolve([]));
      const suggestAccountStub = stubRestApi('getSuggestedAccounts')
          .returns(Promise.resolve([]));

      await provider.getSuggestions('');
      assert.isTrue(suggestReviewerStub.calledOnce);
      assert.isTrue(suggestReviewerStub.calledWith(42, ''));
      assert.isFalse(suggestAccountStub.called);
    });
  });

  suite('allowAnyUser set to true', () => {
    setup(async () => {
      provider = GrReviewerSuggestionsProvider.create(
          getAppContext().restApiService, change._number,
          SUGGESTIONS_PROVIDERS_USERS_TYPES.ANY);
      await provider.init();
    });

    test('getSuggestedAccounts is used', async () => {
      const suggestReviewerStub = stubRestApi('getChangeSuggestedReviewers')
          .returns(Promise.resolve([]));
      const suggestAccountStub = stubRestApi('getSuggestedAccounts')
          .returns(Promise.resolve([]));

      await provider.getSuggestions('');
      assert.isFalse(suggestReviewerStub.called);
      assert.isTrue(suggestAccountStub.calledOnce);
      assert.isTrue(suggestAccountStub.calledWith('cansee:42 '));
    });
  });
});