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use js_sys::JsString;
use wasm_bindgen::prelude::*;

use crate::{objects::RoomObject, prelude::*};

#[wasm_bindgen]
extern "C" {
    /// A [`Source`], which can be harvested for energy.
    ///
    /// [Screeps documentation](https://docs.screeps.com/api/#Source)
    #[wasm_bindgen(extends = RoomObject)]
    #[derive(Clone, Debug)]
    pub type Source;

    /// Amount of energy available to be harvested from the source.
    ///
    /// [Screeps documentation](https://docs.screeps.com/api/#Source.energy)
    #[wasm_bindgen(method, getter)]
    pub fn energy(this: &Source) -> u32;

    /// Amount of energy this source will regenerate to after
    /// [`Source::ticks_to_regeneration`] reaches 0.
    ///
    /// Value depends on the type of room the source is in:
    ///
    /// - Owned and reserved rooms: [`SOURCE_ENERGY_CAPACITY`]
    /// - Neutral rooms: [`SOURCE_ENERGY_NEUTRAL_CAPACITY`]
    /// - Source Keeper rooms: [`SOURCE_ENERGY_KEEPER_CAPACITY`]
    ///
    /// [Screeps documentation](https://docs.screeps.com/api/#Source.energy)
    ///
    /// [`SOURCE_ENERGY_CAPACITY`]: crate::constants::SOURCE_ENERGY_CAPACITY
    /// [`SOURCE_ENERGY_NEUTRAL_CAPACITY`]:
    /// crate::constants::SOURCE_ENERGY_NEUTRAL_CAPACITY
    /// [`SOURCE_ENERGY_KEEPER_CAPACITY`]:
    /// crate::constants::SOURCE_ENERGY_KEEPER_CAPACITY
    #[wasm_bindgen(method, getter = energyCapacity)]
    pub fn energy_capacity(this: &Source) -> u32;

    /// Object ID of the source, which can be used to efficiently fetch a fresh
    /// reference to the object on subsequent ticks.
    ///
    /// [Screeps documentation](https://docs.screeps.com/api/#Source.id)
    #[wasm_bindgen(method, getter = id)]
    fn id_internal(this: &Source) -> JsString;

    /// The number of ticks until this source regenerates to its
    /// [`Source::energy_capacity`], or `None` if the source has not started to
    /// regenerate.
    ///
    /// [Screeps documentation](https://docs.screeps.com/api/#Source.ticksToRegeneration)
    #[wasm_bindgen(method, getter = ticksToRegeneration)]
    pub fn ticks_to_regeneration(this: &Source) -> Option<u32>;
}

impl HasId for Source {
    fn js_raw_id(&self) -> JsString {
        Self::id_internal(self)
    }
}

impl Harvestable for Source {}