use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
use crate::static_data::{Nature, Statistic};
use std::ptr::drop_in_place;
use std::sync::Arc;

/// Instantiates a new statistic.
#[no_mangle]
extern "C" fn nature_new(
    increase_stat: Statistic,
    decrease_stat: Statistic,
    increase_modifier: f32,
    decrease_modifier: f32,
) -> IdentifiablePointer<Arc<Nature>> {
    Nature::new(increase_stat, decrease_stat, increase_modifier, decrease_modifier).into()
}

/// Reduce the reference count for a nature.
#[no_mangle]
unsafe extern "C" fn nature_drop(ptr: OwnedPtr<Arc<Nature>>) {
    drop_in_place(ptr)
}

/// The stat that should receive the increased modifier.
#[no_mangle]
extern "C" fn nature_increased_stat(ptr: ExternPointer<Arc<Nature>>) -> Statistic {
    ptr.as_ref().increased_stat()
}

/// The stat that should receive the decreased modifier.
#[no_mangle]
extern "C" fn nature_decreased_stat(ptr: ExternPointer<Arc<Nature>>) -> Statistic {
    ptr.as_ref().decreased_stat()
}

/// Calculates the modifier for a given stat. If it's the increased stat, returns the increased
/// modifier, if it's the decreased stat, returns the decreased modifier. Otherwise returns 1.0
#[no_mangle]
extern "C" fn nature_get_stat_modifier(ptr: ExternPointer<Arc<Nature>>, stat: Statistic) -> f32 {
    ptr.as_ref().get_stat_modifier(stat)
}