import { vi } from 'vitest';
import type { EIP1193Provider } from 'viem';

/**
 * Mock EIP-1193 provider for testing
 */
export function createMockEIP1193Provider(): EIP1193Provider {
  const mockProvider = {
    request: vi.fn().mockImplementation(async ({ method, params }) => {
      switch (method) {
        case 'eth_chainId':
          return '0x2aa36a7'; // Sepolia chainId
        case 'eth_accounts':
          return ['0x742d35Cc6634C0532925a3b8D0Ea4E686C9b8A'];
        case 'eth_getBalance':
          return '0x1bc16d674ec80000'; // 2 ETH
        case 'eth_blockNumber':
          return '0x12345';
        case 'eth_gasPrice':
          return '0x9184e72a000'; // 10 gwei
        case 'personal_sign':
        case 'eth_sign':
          return '0x' + 'a'.repeat(130); // Mock signature
        case 'eth_signTypedData_v4':
          return '0x' + 'a'.repeat(130); // Mock typed data signature
        case 'eth_sendTransaction':
          return '0x' + 'b'.repeat(64); // Mock transaction hash
        default:
          throw new Error(`Unsupported method: ${method}`);
      }
    }),
    on: vi.fn(),
    removeListener: vi.fn(),
    // Add additional EIP-1193 properties
    send: vi.fn(),
    sendAsync: vi.fn(),
    isMetaMask: false,
    isConnected: vi.fn().mockReturnValue(true),
  };

  // Add bind method that viem expects and bind all methods
  const boundProvider = {
    ...mockProvider,
    request: mockProvider.request.bind(mockProvider),
    on: mockProvider.on.bind(mockProvider),
    removeListener: mockProvider.removeListener.bind(mockProvider),
    bind: function () {
      return this;
    },
  };

  return boundProvider as any;
}