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use crate::{err_msg, types::heap::BoxedBytes};

use super::{ErrorApiImpl, Handle};

pub trait EndpointArgumentApi {
    type EndpointArgumentApiImpl: EndpointArgumentApiImpl;

    fn argument_api_impl() -> Self::EndpointArgumentApiImpl;
}

/// Interface to only be used by code generated by the macros.
/// The smart contract code doesn't have access to these methods directly.
pub trait EndpointArgumentApiImpl: ErrorApiImpl {
    fn get_num_arguments(&self) -> i32;

    fn check_num_arguments(&self, expected: i32) {
        let nr_args = self.get_num_arguments();
        if nr_args != expected {
            self.signal_error(err_msg::ARG_WRONG_NUMBER.as_bytes());
        }
    }

    fn get_argument_len(&self, arg_index: i32) -> usize;

    fn copy_argument_to_slice(&self, arg_index: i32, slice: &mut [u8]);

    fn get_argument_boxed_bytes(&self, arg_index: i32) -> BoxedBytes;

    fn get_argument_big_int_raw(&self, arg_id: i32) -> Handle;

    fn get_argument_big_uint_raw(&self, arg_id: i32) -> Handle;

    fn get_argument_managed_buffer_raw(&self, arg_id: i32) -> Handle;

    fn get_argument_u64(&self, arg_id: i32) -> u64;

    fn get_argument_i64(&self, arg_id: i32) -> i64;
}