use crate::weapon::{Weapon, WeaponLevel, WeaponType};

#[derive(Clone, Copy)]
pub struct Item(u16);

#[derive(Clone)]
pub struct Inventory {
    current_item: u16,
    current_weapon: u16,
    items: Vec<Item>,
    weapons: Vec<Weapon>,
}

impl Inventory {
    #[allow(clippy::new_without_default)]
    pub fn new() -> Inventory {
        Inventory {
            current_item: 0,
            current_weapon: 0,
            items: Vec::with_capacity(16),
            weapons: Vec::with_capacity(16),
        }
    }

    pub fn add_item(&mut self, item_id: u16) {
        if !self.has_item(item_id) {
            self.items.push(Item(item_id));
        }
    }

    pub fn remove_item(&mut self, item_id: u16) {
        self.items.retain(|item| item.0 != item_id);
    }

    pub fn has_item(&self, item_id: u16) -> bool {
        self.items.iter().any(|item| item.0 == item_id)
    }

    pub fn add_weapon(&mut self, weapon_id: WeaponType, max_ammo: u16) {
        if !self.has_weapon(weapon_id) {
            self.weapons.push(Weapon::new(
                weapon_id,
                WeaponLevel::Level1,
                0,
                max_ammo,
                max_ammo,
            ));
        }
    }

    pub fn remove_weapon(&mut self, wtype: WeaponType) {
        self.weapons.retain(|weapon| weapon.wtype != wtype);
    }

    pub fn get_weapon(&self, idx: usize) -> Option<&Weapon> {
        self.weapons.get(idx)
    }

    pub fn get_current_weapon_mut(&mut self) -> Option<&mut Weapon> {
        self.weapons.get_mut(self.current_weapon as usize)
    }

    pub fn refill_all_ammo(&mut self) {
        for weapon in self.weapons.iter_mut() {
            weapon.ammo = weapon.max_ammo;
        }
    }

    pub fn reset_all_weapon_xp(&mut self) {
        for weapon in self.weapons.iter_mut() {
            weapon.level = WeaponLevel::Level1;
            weapon.experience = 0;
        }
    }

    pub fn get_current_ammo(&self) -> (u16, u16) {
        if let Some(weapon) = self.weapons.get(self.current_weapon as usize) {
            (weapon.ammo, weapon.max_ammo)
        } else {
            (0, 0)
        }
    }

    pub fn get_current_level(&self) -> WeaponLevel {
        if let Some(weapon) = self.weapons.get(self.current_weapon as usize) {
            weapon.level
        } else {
            WeaponLevel::None
        }
    }

    pub fn get_current_weapon_idx(&self) -> u16 {
        self.current_weapon
    }

    pub fn get_weapon_count(&self) -> usize {
        self.weapons.len()
    }

    pub fn has_weapon(&self, wtype: WeaponType) -> bool {
        self.weapons.iter().any(|weapon| weapon.wtype == wtype)
    }
}