use crate::data;
use crate::data::output::Count;
use git_hash::ObjectId;

/// Specifies how the pack location was handled during counting
#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]
#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]
pub enum PackLocation {
    /// We did not lookup this object
    NotLookedUp,
    /// The object was looked up and there may be a location in a pack, along with enty information
    LookedUp(Option<crate::bundle::Location>),
}

impl PackLocation {
    /// Directly go through to LookedUp variant, panic otherwise
    pub fn is_none(&self) -> bool {
        match self {
            PackLocation::LookedUp(opt) => opt.is_none(),
            PackLocation::NotLookedUp => unreachable!("must have been resolved"),
        }
    }
    /// Directly go through to LookedUp variant, panic otherwise
    pub fn as_ref(&self) -> Option<&crate::bundle::Location> {
        match self {
            PackLocation::LookedUp(opt) => opt.as_ref(),
            PackLocation::NotLookedUp => unreachable!("must have been resolved"),
        }
    }
}

impl Count {
    /// Create a new instance from the given `oid` and its corresponding git `obj`ect data.
    pub fn from_data(oid: impl Into<ObjectId>, obj: &data::Object<'_>) -> Self {
        Count {
            id: oid.into(),
            entry_pack_location: PackLocation::LookedUp(obj.pack_location.clone()),
        }
    }
}

///
pub mod objects;
pub use objects::{objects, objects_unthreaded};