package packed

import (
	packfmt "codeberg.org/lindenii/furgit/format/pack"
	"codeberg.org/lindenii/furgit/objecttype"
)

// deltaResolveContent resolves one object's content bytes from its pack location.
func (store *Store) deltaResolveContent(start location) (objecttype.Type, []byte, error) {
	chain, err := store.deltaBuildChain(start)
	if err != nil {
		return objecttype.TypeInvalid, nil, err
	}

	pack, meta, err := store.entryMetaAt(start)
	if err != nil {
		return objecttype.TypeInvalid, nil, err
	}

	declaredSize := meta.size
	if !packfmt.IsBaseObjectType(meta.ty) {
		declaredSize, err = deltaDeclaredSizeAt(pack, meta.dataOffset)
		if err != nil {
			return objecttype.TypeInvalid, nil, err
		}
	}

	return store.deltaResolveChain(chain, declaredSize)
}