@startuml
title Trait Hierarchy
abstract class BaseClient {
    <color:green>abstract</color> {abstract} &Config get_config()
    <color:green>abstract</color> {abstract} &HttpClient get_http()
    <color:green>abstract</color> {abstract} Arc<Mutex<Option<Token>>> get_token()
    <color:green>abstract</color> {abstract} &Credentials get_creds()
    <color:green>abstract</color> {abstract} ClientResult<Option<Token>> refetch_token()
    ---
    ClientResult<()> auto_reauth()
    ClientResult<()> refresh_token()
    String api_url()
    String auth_url()
    ClientResult<Headers> auth_headers()
    ClientResult<()> write_token_cache()
    ClientResult<Token> fetch_access_token()
}

abstract class OAuthClient extends BaseClient{
    <color:green>abstract</color> {abstract} &OAuth get_oauth()
    <color:green>abstract</color> {abstract} ClientResult<()> request_token()
    ---
    Option<Token> read_token_cache()
}

class AuthCodeSpotify implements OAuthClient{
    &Config get_config()
    &HttpClient get_http()
    RwLockReadGuard<Option<Token>> get_token()
    RwLockWriteGuard<Option<Token>> get_token_mut()
    &Credentials get_creds()
    ClientResult<Option<Token>> refetch_token()
    ---
    &OAuth get_oauth()
    ClientResult<()> request_token()
}

class AuthCodePkceSpotify implements OAuthClient{
    &Config get_config()
    &HttpClient get_http()
    RwLockReadGuard<Option<Token>> get_token()
    RwLockWriteGuard<Option<Token>> get_token_mut()
    &Credentials get_creds()
    ClientResult<Option<Token>> refetch_token()
    ---
    &OAuth get_oauth()
    ClientResult<()> request_token()
}

class ClientCredsSpotify implements BaseClient{
    &Config get_config()
    &HttpClient get_http()
    RwLockReadGuard<Option<Token>> get_token()
    RwLockWriteGuard<Option<Token>> get_token_mut()
    &Credentials get_creds()
    ClientResult<Option<Token>> refetch_token()
    ---
}
@enduml