#include "client.h"
#include "tlibc/collections/List.h"

void ClientCredentials_destroy(ClientCredentials* cred){
    if(!cred)
        return;
    free(cred->username.data);
    free(cred->user_data_key.data);
    free(cred->token.data);
}


Result(void) ClientCredentials_tryConstruct(ClientCredentials* cred,
    str username, str password)
{
    Deferral(8);
    
    memset(cred, 0, sizeof(ClientCredentials));
    bool success = false;
    Defer(if(!success) ClientCredentials_destroy(cred));

    cred->username = str_copy(username);

    // concat password and username
    List(u8) data_to_hash = List_alloc_size(password.size + username.size + PASSWORD_HASH_SIZE);
    Defer(free(data_to_hash.data));
    List_push_size(&data_to_hash, password.data, password.size);
    List_push_size(&data_to_hash, username.data, username.size);
    
    // lvl 1 hash - is used as AES key for user data
    cred->user_data_key = Array_alloc(u8, PASSWORD_HASH_SIZE);
    hash_password(List_castTo_Array(data_to_hash), cred->user_data_key.data, PASSWORD_HASH_LVL_ROUNDS);
    // concat lvl 1 hash to data_to_hash
    List_push_size(&data_to_hash, cred->user_data_key.data, cred->user_data_key.size);
    // lvl 2 hash - is used for authentification
    cred->token = Array_alloc(u8, PASSWORD_HASH_SIZE);
    hash_password(List_castTo_Array(data_to_hash), cred->token.data, PASSWORD_HASH_LVL_ROUNDS);

    AESBlockEncryptor_construct(&cred->user_data_aes_enc, cred->user_data_key, AESBlockEncryptor_DEFAULT_CLASS);
    AESBlockDecryptor_construct(&cred->user_data_aes_dec, cred->user_data_key, AESBlockDecryptor_DEFAULT_CLASS);

    success = true;
    Return RESULT_VOID;
}