import { describe, it, expect } from "vitest";

describe("Staff Crypto API", () => {
  const mockTenantId = "123e4567-e89b-12d3-a456-426614174000";
  const mockStaffId = "456e7890-e89b-12d3-a456-426614174001";
  const mockPasskeyId = "passkey_abc123def456";
  const mockEmail = "staff@example.com";

  describe("POST /api/tenants/[id]/staff/[staffId]/crypto", () => {
    it("should validate required parameters", () => {
      expect(mockTenantId).toMatch(
        /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i,
      );
      expect(mockStaffId).toMatch(
        /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i,
      );
    });

    it("should validate request body structure", () => {
      const validRequest = {
        passkeyId: mockPasskeyId,
        publicKey: "base64EncodedPublicKey==",
        privateKeyShare: "base64EncodedPrivateKeyShare==",
        email: mockEmail,
      };

      expect(validRequest.passkeyId).toBeTruthy();
      expect(validRequest.publicKey).toBeTruthy();
      expect(validRequest.privateKeyShare).toBeTruthy();
      expect(validRequest.email).toContain("@");
    });

    it("should validate Base64 encoding format", () => {
      const mockPublicKey = "SGVsbG8gV29ybGQ="; // "Hello World" in base64
      const mockPrivateKeyShare = "VGVzdCBEYXRh"; // "Test Data" in base64

      // Base64 pattern: alphanumeric + / + = for padding
      const base64Pattern = /^[A-Za-z0-9+/]*={0,2}$/;

      expect(mockPublicKey).toMatch(base64Pattern);
      expect(mockPrivateKeyShare).toMatch(base64Pattern);
    });

    it("should handle authentication via session", () => {
      const sessionUserId = mockStaffId;
      const requestStaffId = mockStaffId;

      const isAuthenticated = sessionUserId === requestStaffId;
      expect(isAuthenticated).toBe(true);

      // Test with different user
      const differentUserId: string = "999e7890-e89b-12d3-a456-426614174999";
      const isNotAuthenticated = differentUserId === requestStaffId;
      expect(isNotAuthenticated).toBe(false);
    });

    it("should handle authentication via registration cookie", () => {
      const cookieEmail = "staff@example.com";
      const requestEmail = "staff@example.com";

      const isRegistration = cookieEmail === requestEmail;
      expect(isRegistration).toBe(true);

      // Test with different email
      const differentEmail: string = "other@example.com";
      const isNotRegistration = cookieEmail === differentEmail;
      expect(isNotRegistration).toBe(false);
    });

    it("should validate dual authentication logic", () => {
      // Case 1: Authenticated user
      const authenticatedUserId = mockStaffId;
      const requestStaffId = mockStaffId;
      const isAuthenticated = authenticatedUserId === requestStaffId;

      // Case 2: Registration with cookie
      const registrationEmail = mockEmail;
      const requestEmail = mockEmail;
      const isRegistration = registrationEmail === requestEmail;

      // Should pass if either authentication method is valid
      const shouldAllowAccess = isAuthenticated || isRegistration;
      expect(shouldAllowAccess).toBe(true);
    });

    it("should reject unauthorized access", () => {
      // No session
      const authenticatedUserId = null;
      const requestStaffId = mockStaffId;
      const isAuthenticated = authenticatedUserId === requestStaffId;

      // Wrong email in cookie
      const registrationEmail = "other@example.com";
      const requestEmail: string = mockEmail;
      const isRegistration = registrationEmail === requestEmail;

      // Should deny if neither authentication method is valid
      const shouldDenyAccess = !isAuthenticated && !isRegistration;
      expect(shouldDenyAccess).toBe(true);
    });

    it("should validate successful storage response structure", () => {
      const mockSuccessResponse = {
        success: true,
        message: "Cryptographic keys stored successfully",
      };

      expect(mockSuccessResponse.success).toBe(true);
      expect(mockSuccessResponse.message).toBeTruthy();
      expect(typeof mockSuccessResponse.message).toBe("string");
    });

    it("should validate crypto key relationships", () => {
      // Each passkey should have exactly one crypto key entry
      const passkeyToCryptoMapping = new Map<
        string,
        { publicKey: string; privateKeyShare: string }
      >();

      passkeyToCryptoMapping.set(mockPasskeyId, {
        publicKey: "publicKeyBase64",
        privateKeyShare: "privateKeyShareBase64",
      });

      expect(passkeyToCryptoMapping.has(mockPasskeyId)).toBe(true);
      expect(passkeyToCryptoMapping.get(mockPasskeyId)?.publicKey).toBeTruthy();
      expect(passkeyToCryptoMapping.get(mockPasskeyId)?.privateKeyShare).toBeTruthy();
    });

    it("should validate ML-KEM-768 key size constraints", () => {
      // ML-KEM-768 specifications:
      // - Public key: 1184 bytes
      // - Private key: 2400 bytes
      const mlKem768PublicKeySize = 1184;
      const mlKem768PrivateKeySize = 2400;

      // Base64 encoding increases size by ~33%
      const base64PublicKeyMinSize = Math.floor((mlKem768PublicKeySize * 4) / 3);
      const base64PrivateKeyMinSize = Math.floor((mlKem768PrivateKeySize * 4) / 3);

      expect(base64PublicKeyMinSize).toBeGreaterThan(1500);
      expect(base64PrivateKeyMinSize).toBeGreaterThan(3100);
    });

    it("should validate error response structure", () => {
      const mockErrorResponse = {
        error: "Invalid request data: Passkey ID is required",
      };

      expect(mockErrorResponse.error).toBeTruthy();
      expect(typeof mockErrorResponse.error).toBe("string");
    });

    it("should handle missing required fields", () => {
      const incompleteRequests = [
        { publicKey: "key", privateKeyShare: "share", email: mockEmail }, // Missing passkeyId
        { passkeyId: mockPasskeyId, privateKeyShare: "share", email: mockEmail }, // Missing publicKey
        { passkeyId: mockPasskeyId, publicKey: "key", email: mockEmail }, // Missing privateKeyShare
        { passkeyId: mockPasskeyId, publicKey: "key", privateKeyShare: "share" }, // Missing email
      ];

      incompleteRequests.forEach((request) => {
        const hasAllRequiredFields =
          "passkeyId" in request &&
          "publicKey" in request &&
          "privateKeyShare" in request &&
          "email" in request;
        expect(hasAllRequiredFields).toBe(false);
      });
    });

    it("should validate tenant membership for authenticated users", () => {
      const userTenantId = mockTenantId;
      const requestTenantId = mockTenantId;

      const belongsToTenant = userTenantId === requestTenantId;
      expect(belongsToTenant).toBe(true);

      // Test with different tenant
      const differentTenantId: string = "999e4567-e89b-12d3-a456-426614174999";
      const belongsToDifferentTenant = userTenantId === differentTenantId;
      expect(belongsToDifferentTenant).toBe(false);
    });

    it("should validate XOR shard relationship", () => {
      // Mock data representing the split-key architecture
      const mockPrivateKey = new Uint8Array([0x01, 0x02, 0x03, 0x04]);
      const mockPasskeyBasedShard = new Uint8Array([0x0a, 0x0b, 0x0c, 0x0d]);

      // Database shard = privateKey XOR passkeyBasedShard
      const dbShard = new Uint8Array(mockPrivateKey.length);
      for (let i = 0; i < mockPrivateKey.length; i++) {
        dbShard[i] = mockPrivateKey[i] ^ mockPasskeyBasedShard[i];
      }

      // Verify reconstruction: privateKey = dbShard XOR passkeyBasedShard
      const reconstructedKey = new Uint8Array(dbShard.length);
      for (let i = 0; i < dbShard.length; i++) {
        reconstructedKey[i] = dbShard[i] ^ mockPasskeyBasedShard[i];
      }

      expect(reconstructedKey).toEqual(mockPrivateKey);
    });

    it("should validate cookie TTL constraints", () => {
      // Cookie is set with 5-minute expiry in /api/auth/challenge
      const cookieTTLSeconds = 5 * 60;
      const expectedMaxAge = 300; // 5 minutes

      expect(cookieTTLSeconds).toBe(expectedMaxAge);
      expect(cookieTTLSeconds).toBeGreaterThan(0);
      expect(cookieTTLSeconds).toBeLessThan(600); // Less than 10 minutes
    });
  });
});
