/**
 * P2P Fiat Trading Integration Tests
 *
 * These tests verify the business logic without requiring full E2E setup.
 * Mock Supabase responses to test various scenarios.
 *
 * @module p2p-fiat.integration.test
 */

import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';

// Mock Supabase
const mockSupabase = {
  from: vi.fn(),
  rpc: vi.fn(),
  functions: {
    invoke: vi.fn(),
  },
  auth: {
    getUser: vi.fn(),
  },
};

// Mock the supabase module
vi.mock('@/lib/supabase', () => ({
  supabase: mockSupabase,
}));

// Mock toast
vi.mock('sonner', () => ({
  toast: {
    info: vi.fn(),
    success: vi.fn(),
    error: vi.fn(),
  },
}));

describe('P2P Fiat Trading Integration Tests', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  afterEach(() => {
    vi.restoreAllMocks();
  });

  describe('Payment Details Encryption', () => {
    it('should encrypt payment details with AES-256-GCM', async () => {
      const { encryptPaymentDetails, decryptPaymentDetails } = await import('./p2p-fiat-crypto');

      const details = {
        iban: 'TR000000000000000000000001',
        account_holder: 'Test User',
      };

      const encrypted = await encryptPaymentDetails(details);

      // Encrypted should be base64 encoded
      expect(encrypted).toBeTruthy();
      expect(encrypted).not.toContain('TR000000');

      // Should be decryptable
      const decrypted = await decryptPaymentDetails(encrypted);
      expect(decrypted).toEqual(details);
    });

    it('should produce different ciphertext for same input', async () => {
      const { encryptPaymentDetails } = await import('./p2p-fiat-crypto');

      const details = { iban: 'TR000000000000000000000001' };

      const encrypted1 = await encryptPaymentDetails(details);
      const encrypted2 = await encryptPaymentDetails(details);

      // Due to random IV, outputs should differ
      expect(encrypted1).not.toBe(encrypted2);
    });
  });

  describe('Trade Status Transitions', () => {
    it('should only allow valid status transitions', () => {
      const validTransitions: Record<string, string[]> = {
        pending: ['payment_sent', 'cancelled'],
        payment_sent: ['completed', 'disputed', 'cancelled'],
        disputed: ['completed', 'refunded'],
        completed: [],
        cancelled: [],
        refunded: [],
      };

      // Verify transition rules
      expect(validTransitions['pending']).toContain('payment_sent');
      expect(validTransitions['pending']).toContain('cancelled');
      expect(validTransitions['pending']).not.toContain('completed');

      expect(validTransitions['payment_sent']).toContain('completed');
      expect(validTransitions['payment_sent']).toContain('disputed');

      expect(validTransitions['disputed']).toContain('refunded');
      expect(validTransitions['disputed']).toContain('completed');

      // Terminal states have no transitions
      expect(validTransitions['completed']).toHaveLength(0);
      expect(validTransitions['cancelled']).toHaveLength(0);
      expect(validTransitions['refunded']).toHaveLength(0);
    });
  });

  describe('Escrow Logic', () => {
    it('should lock balance before creating offer', async () => {
      // Simulate successful lock
      mockSupabase.rpc.mockResolvedValueOnce({
        data: JSON.stringify({ success: true, new_available_balance: 95, new_locked_balance: 5 }),
        error: null,
      });

      const result = await mockSupabase.rpc('lock_escrow_internal', {
        p_user_id: 'test-user-id',
        p_token: 'HEZ',
        p_amount: 5,
      });

      expect(result.error).toBeNull();
      const response = JSON.parse(result.data);
      expect(response.success).toBe(true);
      expect(response.new_locked_balance).toBe(5);
    });

    it('should fail lock if insufficient balance', async () => {
      mockSupabase.rpc.mockResolvedValueOnce({
        data: JSON.stringify({ success: false, error: 'Insufficient balance' }),
        error: null,
      });

      const result = await mockSupabase.rpc('lock_escrow_internal', {
        p_user_id: 'test-user-id',
        p_token: 'HEZ',
        p_amount: 1000,
      });

      const response = JSON.parse(result.data);
      expect(response.success).toBe(false);
      expect(response.error).toBe('Insufficient balance');
    });

    it('should release escrow to buyer on confirmation', async () => {
      mockSupabase.rpc.mockResolvedValueOnce({
        data: JSON.stringify({
          success: true,
          seller_new_locked: 0,
          buyer_new_available: 5,
        }),
        error: null,
      });

      const result = await mockSupabase.rpc('release_escrow_internal', {
        p_from_user_id: 'seller-id',
        p_to_user_id: 'buyer-id',
        p_token: 'HEZ',
        p_amount: 5,
        p_reference_type: 'trade',
        p_reference_id: 'trade-123',
      });

      const response = JSON.parse(result.data);
      expect(response.success).toBe(true);
    });
  });

  describe('Offer Acceptance Race Condition Prevention', () => {
    it('should use atomic RPC to prevent double-spending', async () => {
      // First acceptance succeeds
      mockSupabase.rpc.mockResolvedValueOnce({
        data: JSON.stringify({
          success: true,
          trade_id: 'trade-1',
          crypto_amount: 5,
          fiat_amount: 100,
        }),
        error: null,
      });

      const result1 = await mockSupabase.rpc('accept_p2p_offer', {
        p_offer_id: 'offer-123',
        p_buyer_id: 'buyer-1',
        p_buyer_wallet: 'wallet-1',
        p_amount: 5,
      });

      expect(JSON.parse(result1.data).success).toBe(true);

      // Second acceptance should fail (offer already taken)
      mockSupabase.rpc.mockResolvedValueOnce({
        data: JSON.stringify({
          success: false,
          error: 'Insufficient remaining amount',
        }),
        error: null,
      });

      const result2 = await mockSupabase.rpc('accept_p2p_offer', {
        p_offer_id: 'offer-123',
        p_buyer_id: 'buyer-2',
        p_buyer_wallet: 'wallet-2',
        p_amount: 5,
      });

      expect(JSON.parse(result2.data).success).toBe(false);
    });
  });

  describe('Reputation System', () => {
    it('should increase reputation after successful trade', async () => {
      const currentRep = {
        user_id: 'user-1',
        total_trades: 10,
        completed_trades: 9,
        cancelled_trades: 1,
        disputed_trades: 0,
        reputation_score: 80,
        trust_level: 'intermediate',
      };

      // After successful trade
      const newRep = {
        ...currentRep,
        total_trades: 11,
        completed_trades: 10,
        reputation_score: Math.min(100, currentRep.reputation_score + 1),
      };

      expect(newRep.completed_trades).toBe(10);
      expect(newRep.reputation_score).toBe(81);
    });

    it('should decrease reputation after cancelled trade', async () => {
      const currentRep = {
        user_id: 'user-1',
        reputation_score: 50,
        cancelled_trades: 0,
      };

      // After cancellation
      const newRep = {
        ...currentRep,
        cancelled_trades: 1,
        reputation_score: Math.max(0, currentRep.reputation_score - 2),
      };

      expect(newRep.cancelled_trades).toBe(1);
      expect(newRep.reputation_score).toBe(48);
    });

    it('should severely penalize disputed trades', async () => {
      const currentRep = {
        user_id: 'scammer-1',
        reputation_score: 70,
        disputed_trades: 0,
      };

      // After losing dispute (scammer)
      const newRep = {
        ...currentRep,
        disputed_trades: 1,
        reputation_score: Math.max(0, currentRep.reputation_score - 20),
        trust_level: 'new', // Demoted
      };

      expect(newRep.disputed_trades).toBe(1);
      expect(newRep.reputation_score).toBe(50);
      expect(newRep.trust_level).toBe('new');
    });
  });

  describe('Trade Deadlines', () => {
    it('should calculate payment deadline correctly', () => {
      const timeLimitMinutes = 30;
      const tradeCreatedAt = new Date();
      const paymentDeadline = new Date(tradeCreatedAt.getTime() + timeLimitMinutes * 60 * 1000);

      expect(paymentDeadline.getTime() - tradeCreatedAt.getTime()).toBe(30 * 60 * 1000);
    });

    it('should detect expired trades', () => {
      const paymentDeadline = new Date(Date.now() - 1000); // 1 second ago
      const isExpired = new Date(paymentDeadline).getTime() < Date.now();

      expect(isExpired).toBe(true);
    });

    it('should allow action within deadline', () => {
      const paymentDeadline = new Date(Date.now() + 60000); // 1 minute from now
      const isExpired = new Date(paymentDeadline).getTime() < Date.now();

      expect(isExpired).toBe(false);
    });
  });

  describe('Price Calculation', () => {
    it('should calculate price per unit correctly', () => {
      const fiatAmount = 100;
      const cryptoAmount = 5;
      const pricePerUnit = fiatAmount / cryptoAmount;

      expect(pricePerUnit).toBe(20);
    });

    it('should handle partial fills', () => {
      const offerCryptoAmount = 10;
      const buyAmount = 3;
      const pricePerUnit = 20;

      const expectedFiat = buyAmount * pricePerUnit;
      const remainingCrypto = offerCryptoAmount - buyAmount;

      expect(expectedFiat).toBe(60);
      expect(remainingCrypto).toBe(7);
    });
  });
});

/**
 * Test helper to simulate different dispute outcomes
 */
describe('Dispute Resolution Scenarios', () => {
  it('Scenario: No payment proof, no bank verification - Refund to seller', () => {
    const dispute = {
      trade_id: 'trade-1',
      buyer_payment_proof_url: null,
      bank_verified: false,
    };

    // Decision: Refund to seller
    const resolution =
      !dispute.buyer_payment_proof_url && !dispute.bank_verified ? 'refund_to_seller' : 'unknown';

    expect(resolution).toBe('refund_to_seller');
  });

  it('Scenario: Valid payment proof, bank verified - Release to buyer', () => {
    const dispute = {
      trade_id: 'trade-2',
      buyer_payment_proof_url: 'https://example.com/receipt.jpg',
      bank_verified: true,
    };

    // Decision: Release to buyer
    const resolution =
      dispute.buyer_payment_proof_url && dispute.bank_verified ? 'release_to_buyer' : 'unknown';

    expect(resolution).toBe('release_to_buyer');
  });

  it('Scenario: Payment proof exists but bank not verified - Manual review', () => {
    const dispute = {
      trade_id: 'trade-3',
      buyer_payment_proof_url: 'https://example.com/receipt.jpg',
      bank_verified: false,
    };

    // Decision: Needs manual admin review
    const resolution =
      dispute.buyer_payment_proof_url && !dispute.bank_verified ? 'manual_review' : 'unknown';

    expect(resolution).toBe('manual_review');
  });
});
