import { vi, describe, it, expect, beforeEach } from 'vitest';
import { ConflictException, NotFoundException } from '@nestjs/common';
import { ApisService } from './apis.service';
import { ApiType } from '@datacat/shared';

/** Accès à la méthode privée pour les tests unitaires */
function parse(raw: string) {
  return (ApisService.prototype as any).parseSearchTokens.call({}, raw) as {
    text: string;
    type?: ApiType;
    version?: string;
    latestOnly: boolean;
  };
}

describe('ApisService.parseSearchTokens()', () => {
  describe('chaîne vide', () => {
    it('retourne text vide, pas de type, pas de version, latestOnly=false', () => {
      expect(parse('')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: false });
    });

    it('gère les espaces seuls', () => {
      expect(parse('   ')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: false });
    });
  });

  describe('texte libre seul (sans version ni type)', () => {
    it('"auth" → latestOnly=true automatique', () => {
      expect(parse('auth')).toEqual({ text: 'auth', type: undefined, version: undefined, latestOnly: true });
    });

    it('"paiement commande" → texte libre multi-mots, latestOnly=true', () => {
      expect(parse('paiement commande')).toEqual({
        text: 'paiement commande',
        type: undefined,
        version: undefined,
        latestOnly: true,
      });
    });
  });

  describe('détection du type', () => {
    it('"async" → ASYNCAPI', () => {
      const r = parse('async');
      expect(r.type).toBe('ASYNCAPI');
    });

    it('"asyncapi" → ASYNCAPI', () => {
      expect(parse('asyncapi').type).toBe('ASYNCAPI');
    });

    it('"openapi" → OPENAPI', () => {
      expect(parse('openapi').type).toBe('OPENAPI');
    });

    it('"open" → OPENAPI', () => {
      expect(parse('open').type).toBe('OPENAPI');
    });

    it('type seul → latestOnly=true (champ non vide, pas de version)', () => {
      expect(parse('async').latestOnly).toBe(true);
    });

    it('mots de type ne font pas partie du texte libre', () => {
      expect(parse('auth async').text).toBe('auth');
    });
  });

  describe('détection de version', () => {
    it('"v1" → version="1", latestOnly=false', () => {
      expect(parse('v1')).toEqual({ text: '', type: undefined, version: '1', latestOnly: false });
    });

    it('"1.2" → version="1.2"', () => {
      expect(parse('1.2').version).toBe('1.2');
    });

    it('"v1.2.3" → version="1.2.3" (préfixe v supprimé)', () => {
      expect(parse('v1.2.3').version).toBe('1.2.3');
    });

    it('"1.0.0" → version exacte', () => {
      expect(parse('1.0.0').version).toBe('1.0.0');
    });

    it('version présente → latestOnly=false', () => {
      expect(parse('auth v1').latestOnly).toBe(false);
    });

    it('numéro de version ne fait pas partie du texte libre', () => {
      expect(parse('auth v1').text).toBe('auth');
    });
  });

  describe('mot-clé "latest"', () => {
    it('"latest" seul → latestOnly=true, pas de texte', () => {
      expect(parse('latest')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: true });
    });

    it('"latest" + type → latestOnly=true + type détecté', () => {
      const r = parse('latest async');
      expect(r.latestOnly).toBe(true);
      expect(r.type).toBe('ASYNCAPI');
    });

    it('"latest" + version → les deux flags actifs', () => {
      const r = parse('latest v1');
      expect(r.latestOnly).toBe(true);
      expect(r.version).toBe('1');
    });
  });

  describe('combinaisons', () => {
    it('"auth async" → texte=auth, type=ASYNCAPI, latestOnly=true', () => {
      expect(parse('auth async')).toEqual({
        text: 'auth',
        type: 'ASYNCAPI',
        version: undefined,
        latestOnly: true,
      });
    });

    it('"auth async v1" → texte=auth, type=ASYNCAPI, version=1, latestOnly=false', () => {
      expect(parse('auth async v1')).toEqual({
        text: 'auth',
        type: 'ASYNCAPI',
        version: '1',
        latestOnly: false,
      });
    });

    it('"auth 1.0.0" → texte=auth, version=1.0.0, latestOnly=false', () => {
      expect(parse('auth 1.0.0')).toEqual({
        text: 'auth',
        type: undefined,
        version: '1.0.0',
        latestOnly: false,
      });
    });

    it('"openapi latest" → type=OPENAPI, latestOnly=true', () => {
      expect(parse('openapi latest')).toEqual({
        text: '',
        type: 'OPENAPI',
        version: undefined,
        latestOnly: true,
      });
    });

    it('insensible à la casse pour les mots-clés', () => {
      const r = parse('ASYNC Auth LATEST');
      expect(r.type).toBe('ASYNCAPI');
      expect(r.latestOnly).toBe(true);
      expect(r.text).toBe('Auth');
    });
  });
});

// ─── Mocks partagés pour les tests unitaires de ApisService ───────────────────

const mockRepo = {
  findOne: vi.fn(),
  count:   vi.fn(),
  create:  vi.fn(),
  save:    vi.fn(),
  find:    vi.fn(),
  update:  vi.fn(),
  delete:  vi.fn(),
};

const mockDocsService = { generate: vi.fn() };

let service: ApisService;

beforeEach(() => {
  vi.clearAllMocks();
  service = new ApisService(mockRepo as any, mockDocsService as any);
});

function makeEntity(overrides: Record<string, unknown> = {}) {
  return {
    id: 'uuid-1', name: 'Petstore', convention: 'CONSULTER',
    versionMajor: 1, versionMinor: 0, versionPatch: 0,
    type: 'OPENAPI', provider: 'DINUM', description: null,
    yamlContent: 'openapi: "3.0.0"', htmlPath: null,
    status: 'PENDING', errorMessage: null, categoryId: null,
    isCurrent: true,
    contactFunctionalName: '', contactFunctionalEntity: '', contactFunctionalEmail: '',
    contactTechnicalName: '', contactTechnicalEntity: '', contactTechnicalEmail: '',
    createdAt: new Date(), updatedAt: new Date(),
    ...overrides,
  };
}

const baseDto = {
  name: 'Petstore', convention: 'CONSULTER' as const,
  versionMajor: 1, versionMinor: 0, versionPatch: 0,
  type: 'OPENAPI' as const, provider: 'DINUM',
  yamlContent: 'openapi: "3.0.0"',
  contactFunctionalName: 'Alice', contactFunctionalEntity: 'DINUM', contactFunctionalEmail: 'alice@dinum.fr',
  contactTechnicalName: 'Bob', contactTechnicalEntity: 'DINUM', contactTechnicalEmail: 'bob@dinum.fr',
};

// ─── ApisService.create() ─────────────────────────────────────────────────────

describe('ApisService.create()', () => {
  it('crée l\'entrée et la retourne', async () => {
    const entity = makeEntity();
    mockRepo.findOne.mockResolvedValue(null);
    mockRepo.count.mockResolvedValue(0);
    mockRepo.create.mockReturnValue(entity);
    mockRepo.save.mockResolvedValue(entity);

    const result = await service.create(baseDto as any);

    expect(result.id).toBe('uuid-1');
    expect(result.title).toBe('Consulter Petstore');
    expect(result.version).toBe('1.0.0');
  });

  it('lève ConflictException si doublon', async () => {
    mockRepo.findOne.mockResolvedValue(makeEntity());

    await expect(service.create(baseDto as any)).rejects.toThrow(ConflictException);
  });

  it('isCurrent=true si première version', async () => {
    const entity = makeEntity({ isCurrent: true });
    mockRepo.findOne.mockResolvedValue(null);
    mockRepo.count.mockResolvedValue(0);
    mockRepo.create.mockReturnValue(entity);
    mockRepo.save.mockResolvedValue(entity);

    await service.create(baseDto as any);

    expect(mockRepo.create).toHaveBeenCalledWith(expect.objectContaining({ isCurrent: true }));
  });

  it('isCurrent=false si version ultérieure', async () => {
    const entity = makeEntity({ isCurrent: false });
    mockRepo.findOne.mockResolvedValue(null);
    mockRepo.count.mockResolvedValue(1);
    mockRepo.create.mockReturnValue(entity);
    mockRepo.save.mockResolvedValue(entity);

    await service.create(baseDto as any);

    expect(mockRepo.create).toHaveBeenCalledWith(expect.objectContaining({ isCurrent: false }));
  });
});

// ─── ApisService.findOneOrThrow() ────────────────────────────────────────────

describe('ApisService.findOneOrThrow()', () => {
  it('retourne l\'entrée mappée si trouvée', async () => {
    mockRepo.findOne.mockResolvedValue(makeEntity());

    const result = await service.findOneOrThrow('uuid-1');

    expect(result.id).toBe('uuid-1');
    expect(result.title).toBe('Consulter Petstore');
    expect(result.version).toBe('1.0.0');
  });

  it('lève NotFoundException si absente', async () => {
    mockRepo.findOne.mockResolvedValue(null);

    await expect(service.findOneOrThrow('uuid-unknown')).rejects.toThrow(NotFoundException);
  });
});

// ─── ApisService.remove() ────────────────────────────────────────────────────

describe('ApisService.remove()', () => {
  it('supprime l\'entrée si elle existe', async () => {
    mockRepo.findOne.mockResolvedValue(makeEntity());
    mockRepo.delete.mockResolvedValue({ affected: 1 });

    await service.remove('uuid-1');

    expect(mockRepo.delete).toHaveBeenCalledWith('uuid-1');
  });

  it('lève NotFoundException si absente', async () => {
    mockRepo.findOne.mockResolvedValue(null);

    await expect(service.remove('uuid-unknown')).rejects.toThrow(NotFoundException);
  });
});

// ─── ApisService.findVersionsOf() ────────────────────────────────────────────

describe('ApisService.findVersionsOf()', () => {
  it('retourne toutes les versions (même name+convention)', async () => {
    const entity1 = makeEntity({ id: 'uuid-1', versionMajor: 2 });
    const entity2 = makeEntity({ id: 'uuid-2', versionMajor: 1 });
    mockRepo.findOne.mockResolvedValue(entity1);
    mockRepo.find.mockResolvedValue([entity1, entity2]);

    const result = await service.findVersionsOf('uuid-1');

    expect(result).toHaveLength(2);
    expect(result[0].id).toBe('uuid-1');
    expect(result[1].id).toBe('uuid-2');
  });

  it('lève NotFoundException si id inconnu', async () => {
    mockRepo.findOne.mockResolvedValue(null);

    await expect(service.findVersionsOf('uuid-unknown')).rejects.toThrow(NotFoundException);
  });
});

// ─── ApisService.setCurrent() ────────────────────────────────────────────────

describe('ApisService.setCurrent()', () => {
  it('met isCurrent=false sur les siblings puis true sur la cible', async () => {
    mockRepo.findOne.mockResolvedValue(makeEntity());
    mockRepo.update.mockResolvedValue({ affected: 1 });

    await service.setCurrent('uuid-1');

    expect(mockRepo.update).toHaveBeenCalledWith(
      { name: 'Petstore', convention: 'CONSULTER' },
      { isCurrent: false },
    );
    expect(mockRepo.update).toHaveBeenCalledWith(
      { id: 'uuid-1' },
      { isCurrent: true },
    );
  });
});

// ─── ApisService.regenerate() ────────────────────────────────────────────────

describe('ApisService.regenerate()', () => {
  it('remet le statut à PENDING et appelle docsService.generate()', async () => {
    mockRepo.findOne.mockResolvedValue(makeEntity());
    mockRepo.update.mockResolvedValue({ affected: 1 });
    mockDocsService.generate.mockResolvedValue(undefined);

    await service.regenerate('uuid-1');

    expect(mockRepo.update).toHaveBeenCalledWith('uuid-1', { status: 'PENDING', errorMessage: null });
    expect(mockDocsService.generate).toHaveBeenCalledWith('uuid-1');
  });
});