/**
 * Application Use Case Tests: CastAdminVoteUseCase
 * 
 * Tests for casting votes in admin vote sessions
 */

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { CastAdminVoteUseCase } from './CastAdminVoteUseCase';
import { AdminVoteSessionRepository } from '../../domain/repositories/AdminVoteSessionRepository';
import { AdminVoteSession } from '../../domain/entities/AdminVoteSession';

// Mock repository
const createMockRepository = () => ({
  save: vi.fn(),
  findById: vi.fn(),
  findActiveForAdmin: vi.fn(),
  findByAdminAndLeague: vi.fn(),
  findByLeague: vi.fn(),
  findClosedUnprocessed: vi.fn(),
});

describe('CastAdminVoteUseCase', () => {
  let useCase: CastAdminVoteUseCase;
  let mockRepository: ReturnType<typeof createMockRepository>;

  beforeEach(() => {
    mockRepository = createMockRepository();
    useCase = new CastAdminVoteUseCase(mockRepository);
  });

  describe('Input validation', () => {
    it('should reject when voteSessionId is missing', async () => {
      const result = await useCase.execute({
        voteSessionId: '',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('voteSessionId is required');
    });

    it('should reject when voterId is missing', async () => {
      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: '',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('voterId is required');
    });

    it('should reject when positive is not a boolean', async () => {
      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: 'true' as any,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('positive must be a boolean value');
    });

    it('should reject when votedAt is not a valid date', async () => {
      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
        votedAt: 'invalid-date',
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('votedAt must be a valid date if provided');
    });

    it('should accept valid input with all fields', async () => {
      mockRepository.findById.mockResolvedValue({
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      });

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
        votedAt: '2024-01-01T00:00:00Z',
      });

      expect(result.success).toBe(true);
      expect(result.errors).toBeUndefined();
    });

    it('should accept valid input without optional votedAt', async () => {
      mockRepository.findById.mockResolvedValue({
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      });

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(true);
      expect(result.errors).toBeUndefined();
    });
  });

  describe('Session lookup', () => {
    it('should reject when vote session is not found', async () => {
      mockRepository.findById.mockResolvedValue(null);

      const result = await useCase.execute({
        voteSessionId: 'non-existent-session',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('Vote session not found');
    });

    it('should find session by ID when provided', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(mockRepository.findById).toHaveBeenCalledWith('session-123');
    });
  });

  describe('Voting window validation', () => {
    it('should reject when voting window is not open', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(false),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('Vote session is not open for voting');
      expect(mockSession.isVotingWindowOpen).toHaveBeenCalled();
    });

    it('should accept when voting window is open', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(true);
      expect(mockSession.isVotingWindowOpen).toHaveBeenCalled();
    });

    it('should use current time when votedAt is not provided', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(mockSession.isVotingWindowOpen).toHaveBeenCalledWith(expect.any(Date));
    });

    it('should use provided votedAt when available', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const votedAt = new Date('2024-01-01T12:00:00Z');
      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
        votedAt: votedAt.toISOString(),
      });

      expect(mockSession.isVotingWindowOpen).toHaveBeenCalledWith(votedAt);
    });
  });

  describe('Vote casting', () => {
    it('should cast positive vote when session is open', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(mockSession.castVote).toHaveBeenCalledWith('voter-123', true, expect.any(Date));
    });

    it('should cast negative vote when session is open', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: false,
      });

      expect(mockSession.castVote).toHaveBeenCalledWith('voter-123', false, expect.any(Date));
    });

    it('should save updated session after casting vote', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(mockRepository.save).toHaveBeenCalledWith(mockSession);
    });

    it('should return success when vote is cast', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(true);
      expect(result.voteSessionId).toBe('session-123');
      expect(result.voterId).toBe('voter-123');
      expect(result.errors).toBeUndefined();
    });
  });

  describe('Error handling', () => {
    it('should handle repository errors gracefully', async () => {
      mockRepository.findById.mockRejectedValue(new Error('Database error'));

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('Failed to cast vote: Database error');
    });

    it('should handle unexpected errors gracefully', async () => {
      mockRepository.findById.mockRejectedValue('Unknown error');

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('Failed to cast vote: Unknown error');
    });

    it('should handle save errors gracefully', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);
      mockRepository.save.mockRejectedValue(new Error('Save failed'));

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.success).toBe(false);
      expect(result.errors).toContain('Failed to cast vote: Save failed');
    });
  });

  describe('Return values', () => {
    it('should return voteSessionId in success response', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.voteSessionId).toBe('session-123');
    });

    it('should return voterId in success response', async () => {
      const mockSession = {
        id: 'session-123',
        isVotingWindowOpen: vi.fn().mockReturnValue(true),
        castVote: vi.fn(),
      };
      mockRepository.findById.mockResolvedValue(mockSession);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.voterId).toBe('voter-123');
    });

    it('should return voteSessionId in error response', async () => {
      mockRepository.findById.mockResolvedValue(null);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.voteSessionId).toBe('session-123');
    });

    it('should return voterId in error response', async () => {
      mockRepository.findById.mockResolvedValue(null);

      const result = await useCase.execute({
        voteSessionId: 'session-123',
        voterId: 'voter-123',
        positive: true,
      });

      expect(result.voterId).toBe('voter-123');
    });
  });
});