/// The foreign function interface for the growth rate library.
mod growth_rate_library;
/// The foreign function interface for the library settings.
mod library_settings;
/// The foreign function interface for the nature library.
mod nature_library;
/// The foreign function interface for the static data.
mod static_data;
/// The foreign function interface for the type library.
mod type_library;

use crate::ffi::{FFIHandle, FromFFIHandle};
use crate::ffi::{NonOwnedPtrString, OwnedPtrString};
use crate::static_data::*;
use std::ffi::CStr;
use std::sync::Arc;

/// Generates foreign function interfaces for a DataLibrary trait implementation.
macro_rules! library_interface {
    ($library_type_name:ident, $library_type:ty, $return_type:ty) => {
        paste::paste! {
            #[no_mangle]
            extern "C" fn [< $library_type_name:snake _new >](capacity: usize) -> FFIHandle<$library_type> {
                let value: $library_type = Arc::new([<$library_type_name Impl>]::new(capacity));
                FFIHandle::get_handle(value.into())
            }

            #[no_mangle]
            unsafe extern "C" fn [< $library_type_name:snake _add >](ptr: FFIHandle<$library_type>, key: NonOwnedPtrString, value: FFIHandle<Arc<$return_type>>) {
                let lib = ptr.from_ffi_handle();
                lib.add(&CStr::from_ptr(key).into(), value.from_ffi_handle());
            }

            #[no_mangle]
            unsafe extern "C" fn [< $library_type_name:snake _remove >](ptr: FFIHandle<$library_type>, key: NonOwnedPtrString) {
                let lib = ptr.from_ffi_handle();
                lib.remove(&CStr::from_ptr(key).into());
            }

            #[no_mangle]
            unsafe extern "C" fn [< $library_type_name:snake _get >](ptr: FFIHandle<$library_type>, key: NonOwnedPtrString) -> FFIHandle<Arc<$return_type>> {
                let lib = ptr.from_ffi_handle();
                let v = lib.get(&CStr::from_ptr(key).into());
                if let Some(value) = v {
                    FFIHandle::get_handle(value.clone().into())
                } else {
                    FFIHandle::none()
                }
            }

            #[no_mangle]
            unsafe extern "C" fn [< $library_type_name:snake _get_key_by_index >](ptr: FFIHandle<$library_type>, index: usize) -> OwnedPtrString {
                let lib = ptr.from_ffi_handle();
                let v = lib.get_key_by_index(index);
                if let Some(value) = v {
                    OwnedPtrString(std::ffi::CString::new(value.str()).unwrap().into_raw())
                } else {
                    OwnedPtrString(std::ptr::null_mut())
                }
            }

            #[no_mangle]
            unsafe extern "C" fn [< $library_type_name:snake _len >](ptr: FFIHandle<$library_type>) -> usize {
                let lib = ptr.from_ffi_handle();
                lib.len()
            }
        }
    };
}

library_interface!(SpeciesLibrary, Arc<dyn SpeciesLibrary>, dyn Species);
library_interface!(MoveLibrary, Arc<dyn MoveLibrary>, dyn MoveData);
library_interface!(AbilityLibrary, Arc<dyn AbilityLibrary>, dyn Ability);
library_interface!(ItemLibrary, Arc<dyn ItemLibrary>, dyn Item);