pub mod find_files;
pub mod get_file_metadata;
pub mod get_tree;
pub mod list_tree;

use crate::bare::GitBare;
use crate::pb::{self, RecentCommit, object_selector};

pub(crate) fn resolve_revision(sel: &Option<pb::ObjectSelector>) -> String {
    match sel.as_ref().and_then(|s| s.selector.as_ref()) {
        Some(object_selector::Selector::Oid(oid)) => oid.hex.clone(),
        Some(object_selector::Selector::Revision(name)) => name.revision.clone(),
        None => "HEAD".into(),
    }
}

pub(crate) fn recent_commit(gb: &GitBare, revision: &str, path: &str) -> Option<RecentCommit> {
    let output = std::process::Command::new("git")
        .args([
            "--git-dir",
            &gb.bare_dir.to_string_lossy(),
            "log",
            "-1",
            "--format=%H %s %at",
            revision,
            "--",
            path,
        ])
        .output()
        .ok()?;
    if !output.status.success() {
        return None;
    }
    let line = String::from_utf8_lossy(&output.stdout).trim().to_string();
    if line.is_empty() {
        return None;
    }
    let (hex, rest) = line.split_once(' ')?;
    let (subject, ts_str) = rest.rsplit_once(' ')?;
    let ts: i64 = ts_str.parse().ok()?;
    Some(RecentCommit {
        oid: Some(gb.oid_to_pb(hex)),
        subject: subject.to_string(),
        committed_timestamp: ts,
    })
}

pub(crate) fn is_lfs_pointer(data: &[u8]) -> bool {
    data.starts_with(b"version https://git-lfs.github.com/spec/v1")
}