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

describe("Delete Passkey API", () => {
  const mockUserId = "456e7890-e89b-12d3-a456-426614174001";
  const mockPasskeyId = "passkey_abc123def456";
  const mockTenantId = "123e4567-e89b-12d3-a456-426614174000";

  describe("DELETE /api/auth/passkeys/[passkeyId]", () => {
    it("should validate authentication requirement", () => {
      // No authenticated user
      const user = null;

      // Should require authentication
      const isAuthenticated = user !== null;
      expect(isAuthenticated).toBe(false);
    });

    it("should verify passkey exists and belongs to user", () => {
      const userPasskeys = [
        { id: "passkey_1", userId: mockUserId, deviceName: "Device 1" },
        { id: "passkey_2", userId: mockUserId, deviceName: "Device 2" },
        { id: mockPasskeyId, userId: mockUserId, deviceName: "Current Device" },
      ];

      // Should find owned passkey
      const ownedPasskey = userPasskeys.find((p) => p.id === mockPasskeyId);
      expect(ownedPasskey).toBeDefined();
      expect(ownedPasskey?.userId).toBe(mockUserId);

      // Should not find unowned passkey
      const unownedPasskeyId = "passkey_not_owned";
      const unownedPasskey = userPasskeys.find((p) => p.id === unownedPasskeyId);
      expect(unownedPasskey).toBeUndefined();
    });

    it("should prevent deletion of last passkey", () => {
      const userPasskeys = [{ id: mockPasskeyId, userId: mockUserId, deviceName: "Only Device" }];

      // Should detect this is the last passkey
      const isLastPasskey = userPasskeys.length === 1;
      expect(isLastPasskey).toBe(true);
      expect(userPasskeys.length).toBe(1);
    });

    it("should prevent deletion of currently used passkey", () => {
      const currentSessionPasskeyId = mockPasskeyId;
      const passkeyToDelete = mockPasskeyId;

      // Should detect attempted deletion of current session passkey
      const isDeletingCurrentPasskey = currentSessionPasskeyId === passkeyToDelete;
      expect(isDeletingCurrentPasskey).toBe(true);
    });

    it("should allow deletion when user has multiple passkeys", () => {
      const userPasskeys = [
        { id: "passkey_1", userId: mockUserId },
        { id: "passkey_2", userId: mockUserId },
        { id: mockPasskeyId, userId: mockUserId },
      ];

      // Should allow deletion when multiple passkeys exist
      const canDelete = userPasskeys.length > 1;
      expect(canDelete).toBe(true);
      expect(userPasskeys.length).toBeGreaterThan(1);
    });

    it("should allow deletion when not deleting current session passkey", () => {
      const currentSessionPasskeyId: string = "passkey_1";
      const passkeyToDelete = mockPasskeyId;

      // Should allow deletion of different passkey
      const isDeletingDifferentPasskey = currentSessionPasskeyId !== passkeyToDelete;
      expect(isDeletingDifferentPasskey).toBe(true);
    });

    it("should validate successful deletion response structure", () => {
      const mockSuccessResponse = {
        message: "Passkey deleted successfully",
        deletedPasskeyId: mockPasskeyId,
      };

      expect(mockSuccessResponse.message).toBe("Passkey deleted successfully");
      expect(mockSuccessResponse.deletedPasskeyId).toBe(mockPasskeyId);
      expect(typeof mockSuccessResponse.deletedPasskeyId).toBe("string");
    });

    it("should cascade delete staff crypto data for tenant users", () => {
      // User with tenant (STAFF or TENANT_ADMIN)
      const userWithTenant = {
        id: mockUserId,
        tenantId: mockTenantId,
        role: "STAFF" as const,
      };

      // Should trigger cascade deletion
      const shouldCascadeDelete = userWithTenant.tenantId !== null;
      expect(shouldCascadeDelete).toBe(true);

      // Simulate crypto data deletion
      const cryptoEntries = [
        { passkeyId: "passkey_1", userId: mockUserId, tenantId: mockTenantId },
        { passkeyId: mockPasskeyId, userId: mockUserId, tenantId: mockTenantId },
        { passkeyId: "passkey_3", userId: mockUserId, tenantId: mockTenantId },
      ];

      const remainingAfterDeletion = cryptoEntries.filter(
        (entry) => entry.passkeyId !== mockPasskeyId,
      );

      expect(cryptoEntries.length).toBe(3);
      expect(remainingAfterDeletion.length).toBe(2);
      expect(remainingAfterDeletion.every((e) => e.passkeyId !== mockPasskeyId)).toBe(true);
    });

    it("should not cascade delete for global admin without tenant", () => {
      // Global admin without tenant
      const globalAdmin = {
        id: mockUserId,
        tenantId: null,
        role: "GLOBAL_ADMIN" as const,
      };

      // Should not trigger cascade deletion
      const shouldCascadeDelete = globalAdmin.tenantId !== null;
      expect(shouldCascadeDelete).toBe(false);
    });

    it("should validate error responses for different scenarios", () => {
      const errorScenarios = [
        {
          status: 400,
          error: "Cannot delete your last passkey",
          scenario: "Last passkey deletion attempt",
        },
        {
          status: 400,
          error: "Cannot delete the passkey you are currently using",
          scenario: "Current passkey deletion attempt",
        },
        {
          status: 400,
          error: "Passkey ID is required",
          scenario: "Missing passkey ID",
        },
        {
          status: 401,
          error: "Authentication required",
          scenario: "Unauthenticated request",
        },
        {
          status: 404,
          error: "Passkey not found or does not belong to you",
          scenario: "Passkey doesn't exist or wrong owner",
        },
        {
          status: 404,
          error: "Failed to delete passkey",
          scenario: "Database deletion failed",
        },
      ];

      errorScenarios.forEach((scenario) => {
        expect(scenario.status).toBeGreaterThanOrEqual(400);
        expect(scenario.status).toBeLessThan(600);
        expect(scenario.error).toBeTruthy();
        expect(scenario.scenario).toBeTruthy();
      });
    });

    it("should validate passkeyId parameter extraction", () => {
      // Simulate route params
      const params = { passkeyId: mockPasskeyId };

      expect(params.passkeyId).toBe(mockPasskeyId);
      expect(typeof params.passkeyId).toBe("string");
      expect(params.passkeyId.length).toBeGreaterThan(0);
    });

    it("should handle cascade deletion errors gracefully", () => {
      // Even if cascade deletion fails, the passkey should be deleted
      const passkeyDeleted = true;
      const cascadeDeletionFailed = true;

      // Main operation should succeed
      expect(passkeyDeleted).toBe(true);

      // But cascade failure should be logged
      if (cascadeDeletionFailed) {
        const shouldLogWarning = true;
        expect(shouldLogWarning).toBe(true);
      }
    });

    it("should maintain referential integrity after deletion", () => {
      // Before deletion
      const userPasskeys = [
        { id: "passkey_1", userId: mockUserId },
        { id: mockPasskeyId, userId: mockUserId },
        { id: "passkey_3", userId: mockUserId },
      ];

      const cryptoEntries = [
        { passkeyId: "passkey_1", publicKey: "key1" },
        { passkeyId: mockPasskeyId, publicKey: "key2" },
        { passkeyId: "passkey_3", publicKey: "key3" },
      ];

      // After deletion
      const remainingPasskeys = userPasskeys.filter((p) => p.id !== mockPasskeyId);
      const remainingCryptoEntries = cryptoEntries.filter((c) => c.passkeyId !== mockPasskeyId);

      // Both should be reduced by 1
      expect(userPasskeys.length - remainingPasskeys.length).toBe(1);
      expect(cryptoEntries.length - remainingCryptoEntries.length).toBe(1);

      // No orphaned crypto entries
      const passkeyIds = remainingPasskeys.map((p) => p.id);
      remainingCryptoEntries.forEach((crypto) => {
        expect(passkeyIds).toContain(crypto.passkeyId);
      });
    });

    it("should verify ownership before any database operations", () => {
      const userPasskeys = [
        { id: "passkey_1", userId: "different_user_id" },
        { id: "passkey_2", userId: "another_user_id" },
      ];

      // Attempting to delete passkey that doesn't belong to user
      const attemptedDeletion = mockPasskeyId;
      const ownedPasskey = userPasskeys.find(
        (p) => p.id === attemptedDeletion && p.userId === mockUserId,
      );

      // Should fail ownership check
      expect(ownedPasskey).toBeUndefined();
    });

    it("should handle concurrent deletion attempts", () => {
      // Simulate race condition where passkey is deleted between check and deletion
      const initialCheck = { passkeyExists: true };
      const deletionResult = { passkeyExists: false }; // Already deleted

      // Should handle gracefully
      expect(initialCheck.passkeyExists).toBe(true);
      expect(deletionResult.passkeyExists).toBe(false);

      // Should return appropriate error
      if (!deletionResult.passkeyExists) {
        const shouldThrowNotFound = true;
        expect(shouldThrowNotFound).toBe(true);
      }
    });

    it("should validate logging for security audit trail", () => {
      const logEntries = {
        attemptLog: {
          action: "DELETE_PASSKEY_ATTEMPT",
          passkeyId: mockPasskeyId,
          userId: mockUserId,
        },
        successLog: {
          action: "DELETE_PASSKEY_SUCCESS",
          passkeyId: mockPasskeyId,
          userId: mockUserId,
          cascadeDeleted: true,
        },
        errorLog: {
          action: "DELETE_PASSKEY_ERROR",
          passkeyId: mockPasskeyId,
          userId: mockUserId,
          error: "Some error",
        },
      };

      expect(logEntries.attemptLog.action).toBeTruthy();
      expect(logEntries.successLog.action).toBeTruthy();
      expect(logEntries.errorLog.action).toBeTruthy();
    });

    it("should support deletion by device name context", () => {
      const userPasskeys = [
        { id: "passkey_1", userId: mockUserId, deviceName: "iPhone 13" },
        { id: "passkey_2", userId: mockUserId, deviceName: "MacBook Pro" },
        { id: mockPasskeyId, userId: mockUserId, deviceName: "iPad" },
      ];

      // User wants to delete specific device
      const targetDeviceName = "iPad";
      const passkeyToDelete = userPasskeys.find((p) => p.deviceName === targetDeviceName);

      expect(passkeyToDelete).toBeDefined();
      expect(passkeyToDelete?.id).toBe(mockPasskeyId);
      expect(passkeyToDelete?.deviceName).toBe(targetDeviceName);
    });

    it("should validate transaction rollback on error", () => {
      // Simulate transaction steps
      const steps = {
        passkeyDeleted: true,
        cryptoDeleted: false, // Cascade failed
        transactionCommitted: false,
      };

      // But since passkey deletion is main operation and cascade is best-effort
      // The transaction should still commit if passkey deletion succeeds
      const mainOperationSucceeded = steps.passkeyDeleted;
      expect(mainOperationSucceeded).toBe(true);

      // Cascade failure should only log warning
      if (!steps.cryptoDeleted) {
        const shouldLogWarning = true;
        expect(shouldLogWarning).toBe(true);
      }
    });
  });

  describe("Multi-Passkey Support Validation", () => {
    it("should allow users to manage multiple passkeys independently", () => {
      const passkeys = [
        { id: "pk1", deviceName: "Phone", createdAt: new Date("2024-01-01") },
        { id: "pk2", deviceName: "Laptop", createdAt: new Date("2024-01-15") },
        { id: "pk3", deviceName: "Tablet", createdAt: new Date("2024-02-01") },
      ];

      // Each passkey is independent
      expect(passkeys.length).toBe(3);

      // Can delete any non-current passkey
      const currentPasskeyId = "pk1";
      const deletablePasskeys = passkeys.filter((p) => p.id !== currentPasskeyId);
      expect(deletablePasskeys.length).toBe(2);
    });

    it("should preserve crypto data for remaining passkeys after deletion", () => {
      const cryptoData = [
        { passkeyId: "pk1", publicKey: "key1", privateKeyShare: "share1" },
        { passkeyId: "pk2", publicKey: "key2", privateKeyShare: "share2" },
        { passkeyId: "pk3", publicKey: "key3", privateKeyShare: "share3" },
      ];

      // Delete pk2
      const deletedPasskeyId = "pk2";
      const remainingCrypto = cryptoData.filter((c) => c.passkeyId !== deletedPasskeyId);

      // Others should remain intact
      expect(remainingCrypto.length).toBe(2);
      expect(remainingCrypto.find((c) => c.passkeyId === "pk1")).toBeDefined();
      expect(remainingCrypto.find((c) => c.passkeyId === "pk3")).toBeDefined();
      expect(remainingCrypto.find((c) => c.passkeyId === "pk2")).toBeUndefined();
    });

    it("should validate each passkey has unique PRF output", () => {
      // Each passkey produces different PRF for same salt
      const prfOutputs = [
        { passkeyId: "pk1", prfOutput: Buffer.alloc(32, 0x11) },
        { passkeyId: "pk2", prfOutput: Buffer.alloc(32, 0x22) },
        { passkeyId: "pk3", prfOutput: Buffer.alloc(32, 0x33) },
      ];

      // All should be different
      const pk1Output = prfOutputs[0].prfOutput.toString("hex");
      const pk2Output = prfOutputs[1].prfOutput.toString("hex");
      const pk3Output = prfOutputs[2].prfOutput.toString("hex");

      expect(pk1Output).not.toBe(pk2Output);
      expect(pk2Output).not.toBe(pk3Output);
      expect(pk1Output).not.toBe(pk3Output);
    });
  });
});
