/*
 * Copyright © 2025 Hexastack. All rights reserved.
 *
 * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
 * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
 * 2. All derivative works must include clear attribution to the original creator and software, Hexastack and Hexabot, in a prominent location (e.g., in the software's "About" section, documentation, and README file).
 */

import { CACHE_MANAGER } from '@nestjs/cache-manager';
import {
  BadRequestException,
  MethodNotAllowedException,
  NotFoundException,
} from '@nestjs/common';
import { MongooseModule } from '@nestjs/mongoose';

import { IGNORED_TEST_FIELDS } from '@/utils/test/constants';
import { nlpEntityFixtures } from '@/utils/test/fixtures/nlpentity';
import {
  installNlpValueFixtures,
  nlpValueFixtures,
} from '@/utils/test/fixtures/nlpvalue';
import { getPageQuery } from '@/utils/test/pagination';
import {
  closeInMongodConnection,
  rootMongooseTestModule,
} from '@/utils/test/test';
import { TFixtures } from '@/utils/test/types';
import { buildTestingMocks } from '@/utils/test/utils';

import { NlpEntityCreateDto, NlpEntityUpdateDto } from '../dto/nlp-entity.dto';
import { NlpEntityRepository } from '../repositories/nlp-entity.repository';
import { NlpSampleEntityRepository } from '../repositories/nlp-sample-entity.repository';
import { NlpValueRepository } from '../repositories/nlp-value.repository';
import {
  NlpEntity,
  NlpEntityFull,
  NlpEntityModel,
} from '../schemas/nlp-entity.schema';
import { NlpSampleEntityModel } from '../schemas/nlp-sample-entity.schema';
import { NlpValueModel } from '../schemas/nlp-value.schema';
import { NlpEntityService } from '../services/nlp-entity.service';
import { NlpValueService } from '../services/nlp-value.service';

import { NlpEntityController } from './nlp-entity.controller';

describe('NlpEntityController', () => {
  let nlpEntityController: NlpEntityController;
  let nlpValueService: NlpValueService;
  let nlpEntityService: NlpEntityService;
  let intentEntityId: string | null;
  let buitInEntityId: string | null;

  beforeAll(async () => {
    const { getMocks } = await buildTestingMocks({
      controllers: [NlpEntityController],
      imports: [
        rootMongooseTestModule(installNlpValueFixtures),
        MongooseModule.forFeature([
          NlpEntityModel,
          NlpSampleEntityModel,
          NlpValueModel,
        ]),
      ],
      providers: [
        NlpEntityService,
        NlpEntityRepository,
        NlpValueService,
        NlpSampleEntityRepository,
        NlpValueRepository,
        {
          provide: CACHE_MANAGER,
          useValue: {
            del: jest.fn(),
          },
        },
      ],
    });
    [nlpEntityController, nlpValueService, nlpEntityService] = await getMocks([
      NlpEntityController,
      NlpValueService,
      NlpEntityService,
    ]);
    intentEntityId =
      (
        await nlpEntityService.findOne({
          name: 'intent',
        })
      )?.id || null;
    buitInEntityId =
      (
        await nlpEntityService.findOne({
          name: 'built_in',
        })
      )?.id || null;
  });

  afterAll(closeInMongodConnection);

  afterEach(jest.clearAllMocks);

  describe('findPage', () => {
    it('should find nlp entities,and foreach nlp entity, populate the corresponding values', async () => {
      const pageQuery = getPageQuery<NlpEntity>({ sort: ['name', 'desc'] });
      const result = await nlpEntityController.findPage(
        pageQuery,
        ['values'],
        {},
      );
      const entitiesWithValues = nlpEntityFixtures.reduce(
        (acc, curr, index) => {
          acc.push({
            ...curr,
            values: nlpValueFixtures.filter(
              ({ entity }) => parseInt(entity!) === index,
            ) as NlpEntityFull['values'],
            lookups: curr.lookups!,
            builtin: curr.builtin!,
            weight: curr.weight!,
          });
          return acc;
        },
        [] as TFixtures<NlpEntityFull>[],
      );
      expect(result).toEqualPayload(
        entitiesWithValues.sort((a, b) => {
          if (a.name > b.name) {
            return -1;
          }
          if (a.name < b.name) {
            return 1;
          }
          return 0;
        }),
        [...IGNORED_TEST_FIELDS, 'entity'],
      );
    });

    it('should find nlp entities', async () => {
      const pageQuery = getPageQuery<NlpEntity>({ sort: ['name', 'desc'] });
      const result = await nlpEntityController.findPage(
        pageQuery,
        ['invalidCriteria'],
        {},
      );
      expect(result).toEqualPayload(
        nlpEntityFixtures.sort((a, b) => {
          if (a.name > b.name) {
            return -1;
          }
          if (a.name < b.name) {
            return 1;
          }
          return 0;
        }),
      );
    });
  });

  describe('count', () => {
    it('should count the nlp entities', async () => {
      const result = await nlpEntityController.filterCount();
      const count = nlpEntityFixtures.length;
      expect(result).toEqual({ count });
    });
  });

  describe('create', () => {
    it('should create nlp entity', async () => {
      const sentimentEntity: NlpEntityCreateDto = {
        name: 'sentiment',
        lookups: ['trait'],
        builtin: false,
        weight: 1,
      };
      const result = await nlpEntityController.create(sentimentEntity);
      expect(result).toEqualPayload(sentimentEntity);
    });
  });

  describe('deleteOne', () => {
    it('should delete a nlp entity', async () => {
      const result = await nlpEntityController.deleteOne(intentEntityId!);
      expect(result.deletedCount).toEqual(1);
    });

    it('should throw exception when nlp entity id not found', async () => {
      await expect(
        nlpEntityController.deleteOne(intentEntityId!),
      ).rejects.toThrow(NotFoundException);
    });

    it('should throw exception when nlp entity is builtin', async () => {
      await expect(
        nlpEntityController.deleteOne(buitInEntityId!),
      ).rejects.toThrow(MethodNotAllowedException);
    });
  });

  describe('findOne', () => {
    it('should find a nlp entity', async () => {
      const firstNameEntity = await nlpEntityService.findOne({
        name: 'firstname',
      });
      const result = await nlpEntityController.findOne(firstNameEntity!.id, []);

      expect(result).toEqualPayload(
        nlpEntityFixtures.find(({ name }) => name === 'firstname')!,
      );
    });

    it('should find a nlp entity, and populate its values', async () => {
      const firstNameEntity = await nlpEntityService.findOne({
        name: 'firstname',
      });
      const firstNameValues = await nlpValueService.findOne({ value: 'jhon' });
      const firstNameWithValues: NlpEntityFull = {
        ...firstNameEntity,
        values: firstNameValues ? [firstNameValues] : [],
        name: firstNameEntity!.name,
        id: firstNameEntity!.id,
        createdAt: firstNameEntity!.createdAt,
        updatedAt: firstNameEntity!.updatedAt,
        lookups: firstNameEntity!.lookups,
        builtin: firstNameEntity!.builtin,
        weight: firstNameEntity!.weight,
      };
      const result = await nlpEntityController.findOne(firstNameEntity!.id, [
        'values',
      ]);
      expect(result).toEqualPayload(firstNameWithValues);
    });

    it('should throw NotFoundException when Id does not exist', async () => {
      await expect(
        nlpEntityController.findOne(intentEntityId!, ['values']),
      ).rejects.toThrow(NotFoundException);
    });
  });

  describe('updateOne', () => {
    it('should update a nlp entity', async () => {
      const firstNameEntity = await nlpEntityService.findOne({
        name: 'firstname',
      });
      const updatedNlpEntity: NlpEntityCreateDto = {
        name: 'updated',
        doc: '',
        lookups: ['trait'],
        builtin: false,
        weight: 1,
      };
      const result = await nlpEntityController.updateOne(
        firstNameEntity!.id,
        updatedNlpEntity,
      );
      expect(result).toEqualPayload(updatedNlpEntity);
    });

    it('should throw exception when nlp entity id not found', async () => {
      const updateNlpEntity: NlpEntityCreateDto = {
        name: 'updated',
        doc: '',
        lookups: ['trait'],
        builtin: false,
      };
      await expect(
        nlpEntityController.updateOne(intentEntityId!, updateNlpEntity),
      ).rejects.toThrow(NotFoundException);
    });

    it('should update weight if entity is builtin and weight is provided', async () => {
      const updatedNlpEntity: NlpEntityUpdateDto = {
        weight: 4,
      };
      const findOneSpy = jest.spyOn(nlpEntityService, 'findOne');
      const updateWeightSpy = jest.spyOn(nlpEntityService, 'updateWeight');

      const result = await nlpEntityController.updateOne(
        buitInEntityId!,
        updatedNlpEntity,
      );

      expect(findOneSpy).toHaveBeenCalledWith(buitInEntityId!);
      expect(updateWeightSpy).toHaveBeenCalledWith(
        buitInEntityId!,
        updatedNlpEntity.weight,
      );
      expect(result.weight).toBe(updatedNlpEntity.weight);
    });

    it('should update only the weight of the builtin entity', async () => {
      const updatedNlpEntity: NlpEntityCreateDto = {
        name: 'updated',
        doc: '',
        lookups: ['trait'],
        builtin: false,
        weight: 8,
      };
      const originalEntity: NlpEntity | null = await nlpEntityService.findOne(
        buitInEntityId!,
      );

      const result: NlpEntity = await nlpEntityController.updateOne(
        buitInEntityId!,
        updatedNlpEntity,
      );

      // Check weight is updated
      expect(result.weight).toBe(updatedNlpEntity.weight);

      Object.entries(originalEntity!).forEach(([key, value]) => {
        if (key !== 'weight' && key !== 'updatedAt') {
          expect(result[key as keyof typeof result]).toEqual(value);
        }
      });
    });
  });
  describe('deleteMany', () => {
    it('should delete multiple nlp entities', async () => {
      const entitiesToDelete = [
        (
          await nlpEntityService.findOne({
            name: 'sentiment',
          })
        )?.id,
        (
          await nlpEntityService.findOne({
            name: 'updated',
          })
        )?.id,
      ] as string[];

      const result = await nlpEntityController.deleteMany(entitiesToDelete);

      expect(result.deletedCount).toEqual(entitiesToDelete.length);
      const remainingEntities = await nlpEntityService.find({
        _id: { $in: entitiesToDelete },
      });
      expect(remainingEntities.length).toBe(0);
    });

    it('should throw BadRequestException when no IDs are provided', async () => {
      await expect(nlpEntityController.deleteMany([])).rejects.toThrow(
        BadRequestException,
      );
    });

    it('should throw NotFoundException when provided IDs do not exist', async () => {
      const nonExistentIds = [
        '614c1b2f58f4f04c876d6b8d',
        '614c1b2f58f4f04c876d6b8e',
      ];

      await expect(
        nlpEntityController.deleteMany(nonExistentIds),
      ).rejects.toThrow(NotFoundException);
    });
  });
});