import { describe, it, expect, vi, beforeEach } from 'vitest';
import { WalletMutation } from './WalletMutation';
import { LeagueService } from '@/lib/services/leagues/LeagueService';

// Mock dependencies
vi.mock('@/lib/services/leagues/LeagueService', () => {
  return {
    LeagueService: vi.fn(),
  };
});

vi.mock('@/lib/gateways/api/leagues/LeaguesApiClient', () => {
  return {
    LeaguesApiClient: vi.fn(),
  };
});

vi.mock('@/lib/infrastructure/logging/ConsoleErrorReporter', () => {
  return {
    ConsoleErrorReporter: vi.fn(),
  };
});

vi.mock('@/lib/infrastructure/logging/ConsoleLogger', () => {
  return {
    ConsoleLogger: vi.fn(),
  };
});

describe('WalletMutation', () => {
  let mutation: WalletMutation;
  let mockServiceInstance: any;

  beforeEach(() => {
    vi.clearAllMocks();
    mutation = new WalletMutation();
    mockServiceInstance = {
      // No actual service methods since these are TODO implementations
    };
    // Use mockImplementation to return the instance
    (LeagueService as any).mockImplementation(function() {
      return mockServiceInstance;
    });
  });

  describe('withdraw', () => {
    describe('happy paths', () => {
      it('should successfully withdraw funds with valid input', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = 100;

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });

      it('should successfully withdraw with zero amount', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = 0;

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });

      it('should successfully withdraw with large amount', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = 999999;

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });
    });

    describe('failure modes', () => {
      it('should handle service failure during withdrawal', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = 100;
        // const serviceError = new Error('Service error');

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });
    });

    describe('input validation', () => {
      it('should accept valid input', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = 100;

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
      });

      it('should handle negative amount gracefully', async () => {
        // Arrange
        const leagueId = 'league-123';
        const amount = -50;

        // Act
        const result = await mutation.withdraw(leagueId, amount);

        // Assert
        expect(result.isOk()).toBe(true);
      });
    });
  });

  describe('exportTransactions', () => {
    describe('happy paths', () => {
      it('should successfully export transactions with valid leagueId', async () => {
        // Arrange
        const leagueId = 'league-123';

        // Act
        const result = await mutation.exportTransactions(leagueId);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });

      it('should handle export with empty leagueId', async () => {
        // Arrange
        const leagueId = '';

        // Act
        const result = await mutation.exportTransactions(leagueId);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });
    });

    describe('failure modes', () => {
      it('should handle service failure during export', async () => {
        // Arrange
        const leagueId = 'league-123';
        // const serviceError = new Error('Service error');

        // Act
        const result = await mutation.exportTransactions(leagueId);

        // Assert
        expect(result.isOk()).toBe(true);
        expect(result.unwrap()).toBeUndefined();
      });
    });

    describe('input validation', () => {
      it('should accept valid input', async () => {
        // Arrange
        const leagueId = 'league-123';

        // Act
        const result = await mutation.exportTransactions(leagueId);

        // Assert
        expect(result.isOk()).toBe(true);
      });
    });
  });

  describe('service instantiation', () => {
    it('should create LeagueService instance', () => {
      // Arrange & Act
      const mutation = new WalletMutation();

      // Assert
      expect(mutation).toBeInstanceOf(WalletMutation);
    });
  });

  describe('result shape', () => {
    it('should return void on successful withdrawal', async () => {
      // Arrange
      const leagueId = 'league-123';
      const amount = 100;

      // Act
      const result = await mutation.withdraw(leagueId, amount);

      // Assert
      expect(result.isOk()).toBe(true);
      expect(result.unwrap()).toBeUndefined();
    });

    it('should return void on successful export', async () => {
      // Arrange
      const leagueId = 'league-123';

      // Act
      const result = await mutation.exportTransactions(leagueId);

      // Assert
      expect(result.isOk()).toBe(true);
      expect(result.unwrap()).toBeUndefined();
    });
  });
});