use std::{path::PathBuf, sync::atomic::AtomicBool};

use git_features::progress;
use git_testtools::fixture_path_standalone;

use crate::hex_to_id;

#[test]
fn from_paths() -> crate::Result {
    let dir = tempfile::TempDir::new()?;
    let input_indices = std::fs::read_dir(fixture_path_standalone("objects/pack"))?
        .filter_map(|r| {
            r.ok()
                .map(|e| e.path())
                .filter(|p| p.extension().and_then(|e| e.to_str()).unwrap_or("") == "idx")
        })
        .collect::<Vec<_>>();
    assert_eq!(input_indices.len(), 3);
    let output_path = dir.path().join("multi-pack-index");
    let mut out = std::fs::OpenOptions::new()
        .write(true)
        .create_new(true)
        .open(&output_path)?;
    let outcome = git_pack::multi_index::File::write_from_index_paths(
        input_indices.clone(),
        &mut out,
        progress::Discard,
        &AtomicBool::new(false),
        git_pack::multi_index::write::Options {
            object_hash: git_hash::Kind::Sha1,
        },
    )?;

    assert_eq!(
        outcome.multi_index_checksum,
        hex_to_id("d34d327039a3554f8a644b29e07b903fa71ef269")
    );

    let file = git_pack::multi_index::File::at(output_path)?;
    assert_eq!(file.num_indices(), 3);
    assert_eq!(
        file.index_names(),
        vec![
            PathBuf::from("pack-11fdfa9e156ab73caae3b6da867192221f2089c2.idx"),
            PathBuf::from("pack-a2bf8e71d8c18879e499335762dd95119d93d9f1.idx"),
            PathBuf::from("pack-c0438c19fb16422b6bbcce24387b3264416d485b.idx"),
        ]
    );
    assert_eq!(file.num_objects(), 139);
    assert_eq!(file.checksum(), outcome.multi_index_checksum);

    for index in &input_indices {
        std::fs::copy(index, dir.path().join(index.file_name().expect("present")))?;
        let pack = index.with_extension("pack");
        std::fs::copy(&pack, dir.path().join(pack.file_name().expect("present")))?;
    }

    assert_eq!(
        file.verify_integrity(progress::Discard, &AtomicBool::new(false), Default::default())?
            .actual_index_checksum,
        outcome.multi_index_checksum
    );

    let outcome = file.verify_integrity_fast(progress::Discard, &AtomicBool::new(false))?;

    assert_eq!(outcome.0, file.checksum());
    Ok(())
}