import { Test, TestingModule } from '@nestjs/testing';
import { MyService } from './my.service';
import { PrismaService } from '../../prisma/prisma.service';
import { AuditService } from '../audit/audit.service';
import { NotFoundException, BadRequestException } from '@nestjs/common';

describe('MyService', () => {
  let service: MyService;
  const mockPrisma: any = {
    towerUser: { findFirst: jest.fn(), delete: jest.fn() },
    consentRecord: {
      findMany: jest.fn(),
      findFirst: jest.fn(),
      update: jest.fn(),
      updateMany: jest.fn(),
      create: jest.fn(),
      deleteMany: jest.fn(),
    },
    group: { findFirst: jest.fn() },
    memberOptOut: { create: jest.fn(), deleteMany: jest.fn() },
    towerSession: { deleteMany: jest.fn() },
    $transaction: jest.fn(),
  };
  const mockAudit = { log: jest.fn() };

  beforeEach(async () => {
    jest.clearAllMocks();
    mockPrisma.$transaction.mockImplementation((cb: (tx: typeof mockPrisma) => Promise<unknown>) => cb(mockPrisma));
    const module: TestingModule = await Test.createTestingModule({
      providers: [
        MyService,
        { provide: PrismaService, useValue: mockPrisma },
        { provide: AuditService, useValue: mockAudit },
      ],
    }).compile();
    service = module.get<MyService>(MyService);
  });

  describe('getProfile', () => {
    it('returns member profile', async () => {
      mockPrisma.towerUser.findFirst.mockResolvedValue({
        id: 'u-1',
        tenantId: 'tnt-1',
        jid: '1234@s.whatsapp.net',
        displayName: 'Alice',
        createdAt: new Date('2026-01-01T00:00:00Z'),
      });
      const res = await service.getProfile('u-1', 'tnt-1');
      expect(res.id).toBe('u-1');
      expect(res.displayName).toBe('Alice');
    });

    it('throws when not found', async () => {
      mockPrisma.towerUser.findFirst.mockResolvedValue(null);
      await expect(service.getProfile('u-x', 'tnt-1')).rejects.toThrow(NotFoundException);
    });
  });

  describe('listGroups', () => {
    it('returns groups with consent metadata', async () => {
      mockPrisma.consentRecord.findMany.mockResolvedValue([
        {
          group: { id: 'g-1', name: 'UP Parivar' },
          tenantId: 'tnt-1',
          groupId: 'g-1',
          scopes: ['INGEST', 'DISPLAY'],
          retentionDays: 90,
          policyVersion: 'v1',
          status: 'GRANTED',
          effectiveAt: new Date('2026-01-01T00:00:00Z'),
        },
      ]);
      const res = await service.listGroups('u-1', 'tnt-1');
      expect(res).toHaveLength(1);
      expect(res[0].name).toBe('UP Parivar');
      expect(res[0].scopes).toContain('INGEST');
    });
  });

  describe('optOut', () => {
    it('throws when no matching consent', async () => {
      mockPrisma.consentRecord.findMany.mockResolvedValue([]);
      await expect(service.optOut('u-1', 'tnt-1', { groupId: 'g-1' })).rejects.toThrow(NotFoundException);
    });

    it('revokes consent and creates MemberOptOut', async () => {
      mockPrisma.consentRecord.findMany.mockResolvedValue([
        { id: 'c-1', groupId: 'g-1', scopes: ['INGEST', 'DISPLAY'] },
      ]);
      const res = await service.optOut('u-1', 'tnt-1', { groupId: 'g-1', reason: 'SELF_PORTAL' });
      expect(res.revoked).toBe(1);
      expect(mockPrisma.consentRecord.update).toHaveBeenCalledWith(
        expect.objectContaining({
          where: { id: 'c-1' },
          data: expect.objectContaining({ status: 'REVOKED' }),
        }),
      );
      expect(mockPrisma.memberOptOut.create).toHaveBeenCalledWith(
        expect.objectContaining({ data: expect.objectContaining({ reason: 'SELF_PORTAL' }) }),
      );
      expect(mockAudit.log).toHaveBeenCalledWith(
        expect.objectContaining({ action: 'MEMBER_OPT_OUT' }),
      );
    });
  });

  describe('optIn', () => {
    it('rejects empty scopes', async () => {
      await expect(
        service.optIn('u-1', 'tnt-1', { groupId: 'g-1', scopes: [] }),
      ).rejects.toThrow(BadRequestException);
    });

    it('creates a new consent record', async () => {
      mockPrisma.group.findFirst.mockResolvedValue({ id: 'g-1', tenantId: 'tnt-1' });
      mockPrisma.towerUser.findFirst.mockResolvedValue({ id: 'u-1', tenantId: 'tnt-1' });
      mockPrisma.consentRecord.findFirst.mockResolvedValue(null);
      mockPrisma.consentRecord.create.mockResolvedValue({ id: 'c-new' });
      const res = await service.optIn('u-1', 'tnt-1', { groupId: 'g-1', scopes: ['INGEST'] });
      expect(res.ok).toBe(true);
      expect(res.consentId).toBe('c-new');
    });
  });

  describe('deleteAccount', () => {
    it('cascades deletes and writes audit', async () => {
      const res = await service.deleteAccount('u-1', 'tnt-1');
      expect(res.ok).toBe(true);
      expect(mockPrisma.consentRecord.deleteMany).toHaveBeenCalled();
      expect(mockPrisma.towerSession.deleteMany).toHaveBeenCalled();
      expect(mockAudit.log).toHaveBeenCalledWith(
        expect.objectContaining({ action: 'MEMBER_DELETED', resourceId: 'u-1' }),
      );
    });
  });
});