brk/crates/brk_computer/src/inputs/import.rs

use std::path::Path;

use brk_error::Result;
use brk_traversable::Traversable;
use brk_types::Version;
use vecdb::{Database, PAGE_SIZE};

use super::{CountVecs, SpentVecs, Vecs};
use crate::indexes;

impl Vecs {
    pub fn forced_import(
        parent_path: &Path,
        parent_version: Version,
        indexes: &indexes::Vecs,
    ) -> Result<Self> {
        let db = Database::open(&parent_path.join(super::DB_NAME))?;
        db.set_min_len(PAGE_SIZE * 50_000_000)?;

        let version = parent_version;

        let spent = SpentVecs::forced_import(&db, version)?;
        let count = CountVecs::forced_import(&db, version, indexes)?;

        let this = Self { db, spent, count };

        this.db.retain_regions(
            this.iter_any_exportable()
                .flat_map(|v| v.region_names())
                .collect(),
        )?;
        this.db.compact()?;

        Ok(this)
    }
}