#include "client.h"
#include "tlibc/string/StringBuilder.h"

void ClientCredentials_free(ClientCredentials* cred){
    if(cred == NULL)
        return;
    free(cred->username.data);
    free(cred->aes_key.data);
    free(cred);
}


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

    cred->username = str_copy(username);
    Defer(
        if(!success)
            free(cred->username.data);
    );

    // concat password and username
    StringBuilder sb = StringBuilder_alloc(username.size + password.size + 1);
    Defer(StringBuilder_destroy(&sb));
    StringBuilder_append_str(&sb, password);
    StringBuilder_append_str(&sb, username);
    Array(u8) password_and_username = str_castTo_Array(StringBuilder_getStr(&sb));
    cred->aes_key = Array_alloc(u8, PASSWORD_HASH_SIZE);
    Defer(
        if(!success){
            free(cred->aes_key.data);
        }
    );
    // lvl 1 hash - is used as AES key for user data
    hash_password(password_and_username, cred->aes_key.data, __PASSWORD_HASH_LVL_ITERATIONS);

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

    success = true;
    Return RESULT_VALUE(p, cred);
}