use webauthn_rs::prelude::*;

/// Mock WebAuthn credential for testing
///
/// This creates mock WebAuthn credentials and responses for testing
/// passkey registration and authentication flows without requiring a browser.
pub struct MockWebAuthnCredential {
    pub credential_id: Vec<u8>,
    pub counter: u32,
    pub backup_state: bool,
    pub passkey: Passkey,
}

impl MockWebAuthnCredential {
    /// Create a new hardware-bound passkey (e.g., YubiKey, TouchID)
    pub fn new_hardware_key(user_id: Uuid, username: &str) -> Self {
        // Use webauthn-rs to generate a real passkey for testing
        // This will create a valid passkey structure
        let credential_id = uuid::Uuid::new_v4().as_bytes().to_vec();

        // Create a minimal passkey structure for testing
        // Note: In real tests, you'd use webauthn-rs test utilities
        // or the webauthn library's test mode
        Self {
            credential_id: credential_id.clone(),
            counter: 0,
            backup_state: false,
            passkey: create_test_passkey(user_id, username, &credential_id, false),
        }
    }

    /// Create a new cloud-synced passkey (e.g., iCloud Keychain, password manager)
    pub fn new_cloud_synced(user_id: Uuid, username: &str) -> Self {
        let credential_id = uuid::Uuid::new_v4().as_bytes().to_vec();

        Self {
            credential_id: credential_id.clone(),
            counter: 0,
            backup_state: true,
            passkey: create_test_passkey(user_id, username, &credential_id, true),
        }
    }

    /// Increment counter (for clone detection testing)
    pub fn increment_counter(&mut self) {
        self.counter += 1;
    }
}

/// Helper function to create a test passkey
///
/// This creates a minimal but valid passkey structure for testing.
/// Note: For full WebAuthn testing, you should use webauthn-rs's test utilities
/// or mock the WebAuthn responses at the HTTP level.
fn create_test_passkey(
    user_id: Uuid,
    username: &str,
    credential_id: &[u8],
    backup_state: bool,
) -> Passkey {
    // Create a test passkey using webauthn-rs's test utilities
    // This is a simplified version - in production tests you'd want
    // to use the full webauthn-rs test framework or mock HTTP responses

    use webauthn_rs::prelude::*;

    // For now, we'll use a placeholder
    // In actual implementation, you'd use webauthn-rs test utilities
    // or mock the entire flow at the HTTP level

    // This is a marker to indicate where full WebAuthn mocking would go
    unimplemented!("Full WebAuthn mocking should be implemented using webauthn-rs test utilities or HTTP-level mocking")
}

// Note: For comprehensive WebAuthn testing, consider these approaches:
//
// 1. HTTP-level mocking: Mock the entire WebAuthn flow by creating valid
//    JSON responses that match the WebAuthn spec, and test the HTTP endpoints
//
// 2. Use webauthn-rs test mode: The webauthn-rs library has test utilities
//    for creating valid attestation and assertion responses
//
// 3. Integration tests: Test the WebAuthn endpoints with pre-recorded valid
//    WebAuthn responses from real authenticators
//
// For the scope of this implementation, we'll focus on approach #1 (HTTP-level)
// and approach #3 (pre-recorded responses) in the integration tests.