/*
 * Copyright (C) 2020 StApps
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
import {SCThingType} from '@openstapps/core';
import * as mapping from '@openstapps/core-tools/lib/mapping';
import {ElasticsearchTemplateCollection} from '@openstapps/core-tools/lib/mappings/mapping-definitions';
import {Logger} from '@openstapps/logger';
import {AggregationSchema} from '../../../src/storage/elasticsearch/common';
import {checkESTemplate, refreshAllTemplates} from '../../../src/storage/elasticsearch/templating';
import sinon from "sinon";
import * as path from 'path';
import * as common from '@openstapps/core-tools/lib/common';
import {expect} from 'chai';
import fs from 'fs';
import fsExtra from 'fs-extra';
import {Client} from '@elastic/elasticsearch';

describe('templating', function () {
  describe('checkESTemplate', function () {
    const sandbox = sinon.createSandbox();
    let fakeMap: { aggregations: AggregationSchema, errors: string[], mappings: ElasticsearchTemplateCollection };
    beforeEach(function () {
      fakeMap = {
        aggregations: {
          '@all': {
            aggs: {
              type: {
                terms: {
                  field: 'type.raw',
                  size: 1000
                }
              }
            },
            filter: {
              match_all: {}
            }
          },
        },
        errors: [],
        mappings: {
          'template_dish': {
            mappings: {
              dish: {
                // @ts-ignore just mock the mapping
                foo: 'mapping'
              }
            },
            settings: {
              analysis: {
                ducet_sort: {
                  filter: [
                    'german_phonebook'
                  ],
                  tokenizer: 'keyword',
                  type: 'custom'
                },
                search_german: {
                  filter: [
                    'lowercase',
                    'german_stop',
                    'german_stemmer'
                  ],
                  tokenizer: 'stapps_ngram',
                  type: 'custom'
                }
              },
              max_result_window: 30000,
            },
            template: 'stapps_dish*'
          },
          'template_book': {
            mappings: {
              book: {
                // @ts-ignore just mock the mapping
                foo: 'mapping'
              }
            },
            settings: {
              analysis: {
                ducet_sort: {
                  filter: [
                    'german_phonebook'
                  ],
                  tokenizer: 'keyword',
                  type: 'custom'
                },
                search_german: {
                  filter: [
                    'lowercase',
                    'german_stop',
                    'german_stemmer'
                  ],
                  tokenizer: 'stapps_ngram',
                  type: 'custom'
                }
              },
              max_result_window: 30000,
            },
            template: 'stapps_book*'
          }
        }
      }
    });
    afterEach(function () {
      sandbox.restore();
    });

    it('should write new templates when "force update" is true', async function () {
      sandbox.stub(Logger, 'error').resolves();
      sandbox.stub(fs, 'existsSync').returns(true);
      sandbox.stub(common, 'getProjectReflection');
      let caughtData: any = [];
      const writeFileSyncStub = sandbox.stub(fs, 'writeFileSync');
      sandbox.stub(path, 'resolve').returns('/foo/bar');
      sandbox.stub(mapping, 'generateTemplate').returns(fakeMap);

      checkESTemplate(true);

      expect(writeFileSyncStub.callCount).to.be.gt(0);
      for (let i = 0; i < writeFileSyncStub.callCount; i++) {
        caughtData.push(writeFileSyncStub.getCall(i).args[1]);
      }

      expect(caughtData).to.be.eql([
        JSON.stringify(fakeMap.mappings['template_dish'], null, 2),
        JSON.stringify(fakeMap.mappings['template_book'], null, 2),
        JSON.stringify(fakeMap.aggregations),
      ]);
    });

    it('should not write new templates when "force update" is false', async function () {
      sandbox.stub(Logger, 'error').resolves();
      sandbox.stub(fs, 'existsSync').returns(true);
      sandbox.stub(common, 'getProjectReflection');
      const writeFileSyncStub = sandbox.stub(fs, 'writeFileSync');
      sandbox.stub(path, 'resolve').returns('/foo/bar');
      sandbox.stub(mapping, 'generateTemplate').returns(fakeMap);

      checkESTemplate(false);

      expect(writeFileSyncStub.called).to.be.false;
    });

    it('should terminate if there are errors in the map', async function () {
      const processExitStub = sandbox.stub(process, 'exit');
      const fakeMapWithErrors = {
        ...fakeMap,
        errors: ['Foo Error']
      };
      sandbox.stub(Logger, 'error').resolves();
      sandbox.stub(fs, 'existsSync').returns(true);
      sandbox.stub(common, 'getProjectReflection');
      sandbox.stub(fs, 'writeFileSync');
      sandbox.stub(path, 'resolve').returns('/foo/bar');
      sandbox.stub(mapping, 'generateTemplate').returns(fakeMapWithErrors);

      checkESTemplate(true);

      expect(processExitStub.called).to.be.true;
    });
  });

  describe('refreshAllTemplates', async function () {
    const sandbox = sinon.createSandbox();
    const client = {
      indices: {
        putTemplate: (_template: any) => {
        }
      }
    }

    after(function () {
      sandbox.restore();
    });

    it('should put templates for all types', async function () {
      const clientPutTemplateStub = sandbox.stub(client.indices, 'putTemplate');
      sandbox.stub(fsExtra, 'readFile').resolves(Buffer.from('{"foo": "file content"}', 'utf8'));
      await refreshAllTemplates(client as Client);

      for (const type of Object.values(SCThingType)) {
        sinon.assert.calledWith(clientPutTemplateStub, {
          body: {foo: 'file content'},
          name: `template_${type.split(' ').join('_')}`
        })
      }
    });
  });
});