/**
 * Security test suite
 * Run with: npm test -- security.test.ts
 */

import {
  validateAddress,
  validateTransactionData,
  validateTransactionValue,
  validateGasLimit,
  validateNetworkId,
  validateRpcUrl,
  generateSecureId,
  validateTransactionRequest,
} from "../utils/security";
import { TEST_ADDRESSES } from "./test-constants";

describe("Security Validation Tests", () => {
  describe("Address Validation", () => {
    it("should validate correct addresses", () => {
      const valid = validateAddress(TEST_ADDRESSES.ADDRESS_1);
      expect(valid.valid).toBe(true);
      expect(valid.checksummed).toBeDefined();
    });

    it("should reject invalid addresses", () => {
      const invalid = validateAddress("not-an-address");
      expect(invalid.valid).toBe(false);
      expect(invalid.error).toBeDefined();
    });

    it("should reject addresses that are too long", () => {
      const long = validateAddress("0x" + "a".repeat(100));
      expect(long.valid).toBe(false);
    });

    it("should reject empty addresses", () => {
      const empty = validateAddress("");
      expect(empty.valid).toBe(false);
    });

    it("should reject non-string addresses", () => {
      const nonString = validateAddress(null as any);
      expect(nonString.valid).toBe(false);
    });
  });

  describe("Transaction Data Validation", () => {
    it("should accept valid hex data", () => {
      const valid = validateTransactionData("0x1234abcd");
      expect(valid.valid).toBe(true);
    });

    it("should accept empty data", () => {
      const empty = validateTransactionData("");
      expect(empty.valid).toBe(true);
    });

    it("should reject data without 0x prefix", () => {
      const invalid = validateTransactionData("1234abcd");
      expect(invalid.valid).toBe(false);
    });

    it("should reject data that is too long", () => {
      const long = validateTransactionData("0x" + "a".repeat(10001));
      expect(long.valid).toBe(false);
    });

    it("should reject non-hex characters", () => {
      const invalid = validateTransactionData("0xghijklmn");
      expect(invalid.valid).toBe(false);
    });
  });

  describe("Transaction Value Validation", () => {
    it("should accept valid values", () => {
      const valid = validateTransactionValue("1000000000000000000"); // 1 ETH
      expect(valid.valid).toBe(true);
      expect(valid.parsed).toBeDefined();
    });

    it("should accept zero value", () => {
      const zero = validateTransactionValue("0");
      expect(zero.valid).toBe(true);
    });

    it("should reject negative values", () => {
      // Note: BigNumber doesn't support negative, but test the check
      const negative = validateTransactionValue("-1");
      // Will fail at BigNumber.from, but test structure
      expect(negative.valid).toBe(false);
    });

    it("should reject values exceeding maximum", () => {
      const tooLarge = validateTransactionValue(
        "1000000000000000000000001" // > 1M ETH
      );
      expect(tooLarge.valid).toBe(false);
    });
  });

  describe("Gas Limit Validation", () => {
    it("should accept valid gas limits", () => {
      const valid = validateGasLimit("21000");
      expect(valid.valid).toBe(true);
    });

    it("should reject gas limits that are too low", () => {
      const tooLow = validateGasLimit("20000");
      expect(tooLow.valid).toBe(false);
    });

    it("should reject gas limits that are too high", () => {
      const tooHigh = validateGasLimit("20000000");
      expect(tooHigh.valid).toBe(false);
    });
  });

  describe("Network ID Validation", () => {
    it("should accept supported networks", () => {
      const valid = validateNetworkId(1); // Mainnet
      expect(valid.valid).toBe(true);
    });

    it("should reject unsupported networks", () => {
      const invalid = validateNetworkId(99999);
      expect(invalid.valid).toBe(false);
    });

    it("should reject invalid network IDs", () => {
      const invalid = validateNetworkId(-1);
      expect(invalid.valid).toBe(false);
    });
  });

  describe("RPC URL Validation", () => {
    it("should accept valid HTTPS URLs", () => {
      const valid = validateRpcUrl("https://mainnet.infura.io/v3/abc123");
      expect(valid.valid).toBe(true);
    });

    it("should reject invalid URLs", () => {
      const invalid = validateRpcUrl("not-a-url");
      expect(invalid.valid).toBe(false);
    });

    it("should reject HTTP URLs in production", () => {
      const http = validateRpcUrl("http://localhost:8545");
      expect(http.valid).toBe(false);
    });
  });

  describe("Secure ID Generation", () => {
    it("should generate unique IDs", () => {
      const id1 = generateSecureId();
      const id2 = generateSecureId();
      expect(id1).not.toBe(id2);
    });

    it("should generate IDs of correct length", () => {
      const id = generateSecureId();
      expect(id.length).toBeGreaterThan(0);
    });
  });

  describe("Transaction Request Validation", () => {
    it("should validate complete transaction requests", () => {
      const tx = {
        from: TEST_ADDRESSES.ADDRESS_1,
        to: TEST_ADDRESSES.ADDRESS_2,
        value: "1000000000000000000",
        data: "0x",
      };
      const result = validateTransactionRequest(tx);
      expect(result.valid).toBe(true);
      expect(result.errors.length).toBe(0);
    });

    it("should catch missing required fields", () => {
      const tx = {
        from: TEST_ADDRESSES.ADDRESS_1,
        // Missing 'to'
      };
      const result = validateTransactionRequest(tx);
      expect(result.valid).toBe(false);
      expect(result.errors.length).toBeGreaterThan(0);
    });

    it("should catch invalid addresses", () => {
      const tx = {
        from: "invalid-address",
        to: TEST_ADDRESSES.ADDRESS_1,
      };
      const result = validateTransactionRequest(tx);
      expect(result.valid).toBe(false);
      expect(result.errors.some((e) => e.includes("from"))).toBe(true);
    });
  });
});

describe("Attack Vector Tests", () => {
  describe("XSS Prevention", () => {
    it("should sanitize script tags", () => {
      // Test sanitization in components
      const malicious = "<script>alert('xss')</script>";
      // Should be sanitized before rendering
    });
  });

  describe("Replay Attack Prevention", () => {
    it("should prevent duplicate transaction execution", () => {
      // Test nonce management
      // Test transaction deduplication
    });
  });

  describe("Race Condition Tests", () => {
    it("should handle concurrent approvals", async () => {
      // Test multiple simultaneous approvals
      // Should not allow threshold bypass
    });
  });

  describe("Integer Overflow Tests", () => {
    it("should handle large values correctly", () => {
      const largeValue = "115792089237316195423570985008687907853269984665640564039457584007913129639935"; // Max uint256
      const result = validateTransactionValue(largeValue);
      // Should use BigNumber, not parseInt
    });
  });
});