//! Two-factor authentication utilities

use rustelo_core::Result;

/// Two-factor authentication configuration
#[derive(Debug, Clone)]
pub struct TwoFactorConfig {
    /// Service name for TOTP
    pub service_name: String,
    /// Number of digits in TOTP codes
    pub digits: u8,
}

/// Two-factor authentication manager
pub struct TwoFactorManager {
    config: TwoFactorConfig,
}

impl TwoFactorManager {
    /// Create a new 2FA manager
    pub fn new(config: TwoFactorConfig) -> Self {
        Self { config }
    }

    /// Generate a new secret for a user
    pub fn generate_secret(&self) -> Result<String> {
        // TODO: Implement TOTP secret generation
        Ok("JBSWY3DPEHPK3PXP".to_string()) // Example base32 secret
    }

    /// Generate QR code for secret
    pub fn generate_qr_code(&self, user_email: &str, secret: &str) -> Result<String> {
        // TODO: Implement QR code generation
        Ok(format!(
            "otpauth://totp/{}:{}?secret={}&issuer={}",
            self.config.service_name, user_email, secret, self.config.service_name
        ))
    }

    /// Verify TOTP code
    pub fn verify_code(&self, _secret: &str, code: &str) -> Result<bool> {
        // TODO: Implement TOTP code verification
        Ok(code.len() == self.config.digits as usize)
    }
}

impl Default for TwoFactorConfig {
    fn default() -> Self {
        Self {
            service_name: "Rustelo".to_string(),
            digits: 6,
        }
    }
}
