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use serde::Deserialize;
use stdweb::Value;

use crate::{
    local::{Position, RoomName},
    objects::StructurePortal,
    traits::TryInto,
};

#[derive(Deserialize, Debug)]
pub struct InterShardPortalDestination {
    shard: String,
    room: RoomName,
}
js_deserializable!(InterShardPortalDestination);

pub enum PortalDestination {
    InterRoom(Position),
    InterShard(InterShardPortalDestination),
}

impl StructurePortal {
    pub fn destination(&self) -> PortalDestination {
        let v = js! {
            let destination = @{self.as_ref()}.destination;
            if (destination instanceof Position) {
                return destination.__packedPos;
            } else {
                return destination;
            }
        };

        match v {
            Value::Number(_) => PortalDestination::InterRoom(
                v.try_into()
                    .expect("expected Position::try_from(pos.__packedPos) to succeed"),
            ),
            _ => PortalDestination::InterShard(
                v.try_into()
                    .expect("Value couldn't be converted into an InterShardPortalDestination"),
            ),
        }
    }
}