use serde::{Deserialize, Serialize};

use crate::model::{authenticated::UserAuthenticationToken, instance::Instance};

use super::MessageTarget;

/// An account registration request.
///
/// # Authentication
/// - Instance Authentication
///   - **ONLY ACCEPTED WHEN SAME-INSTANCE**
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct RegisterAccountRequest {
    pub username: String,
    pub email: Option<String>,
    pub password: String,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct RegisterAccountResponse {
    pub token: String,
}

/// An authentication token request.
///
/// AKA Login Request
///
/// # Authentication
/// - Instance Authentication
///   - Identifies the Instance to issue the token for
/// # Authorization
/// - Credentials ([`crate::backend::AuthBackend`]-based)
///   - Identifies the User account to issue a token for
///   - Decrypts user private key to issue to
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct AuthenticationTokenRequest {
    pub instance: Instance,
    pub username: String,
    pub password: String,
}

impl MessageTarget for AuthenticationTokenRequest {
    fn target(&self) -> Option<Instance> {
        Some(self.instance.clone())
    }
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct AuthenticationTokenResponse {
    pub token: UserAuthenticationToken,
}

/// An authentication token extension request.
///
/// # Authentication
/// - Instance Authentication
///   - Identifies the Instance to issue the token for
/// - User Authentication
///   - Authenticates the validity of the token
/// # Authorization
/// - Token-based
///   - Validates authorization using token's authenticity
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct TokenExtensionRequest {
    pub token: UserAuthenticationToken,
}

impl MessageTarget for TokenExtensionRequest {
    fn target(&self) -> Option<Instance> {
        // todo!
        None
    }
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct TokenExtensionResponse {
    pub new_token: Option<String>,
}