use crate::ffi::{ffi_getter, ExternPointer, OwnedPtr};
use crate::static_data::{BattleItemCategory, Item, ItemCategory};
use crate::StringKey;
use hashbrown::HashSet;
use std::ffi::{c_char, CStr, CString};
use std::ptr::drop_in_place;

#[no_mangle]
unsafe extern "C" fn item_new(
    name: *const c_char,
    category: ItemCategory,
    battle_category: BattleItemCategory,
    price: i32,
    flags: *const *const c_char,
    flags_length: usize,
) -> OwnedPtr<Item> {
    let flags = std::slice::from_raw_parts(flags, flags_length);
    let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
    let mut flags_set: HashSet<StringKey> = HashSet::with_capacity(flags_length);
    for flag in flags {
        flags_set.insert(CStr::from_ptr(*flag).to_str().unwrap().into());
    }
    Box::into_raw(Box::new(Item::new(&name, category, battle_category, price, flags_set)))
}

#[no_mangle]
unsafe extern "C" fn item_drop(ptr: OwnedPtr<Item>) {
    drop_in_place(ptr)
}

#[no_mangle]
unsafe extern "C" fn item_name(ptr: ExternPointer<Item>) -> OwnedPtr<c_char> {
    let name = ptr.as_ref().name();
    CString::new(name.str()).unwrap().into_raw()
}

ffi_getter!(Item, category, ItemCategory);
ffi_getter!(Item, battle_category, BattleItemCategory);
ffi_getter!(Item, price, i32);

#[no_mangle]
unsafe extern "C" fn item_has_flag(ptr: ExternPointer<Item>, flag: *const c_char) -> u8 {
    let flag = CStr::from_ptr(flag).into();
    if ptr.as_ref().has_flag(&flag) {
        1
    } else {
        0
    }
}