use dirigent_fermata::core::project::find_project_root;
use std::fs;
use tempfile::TempDir;

#[test]
fn finds_botignore_toml_first() {
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("sub/deep")).unwrap();
    fs::write(root.join("botignore.toml"), "").unwrap();
    fs::write(root.join(".botignore.toml"), "").unwrap();
    fs::create_dir_all(root.join(".git")).unwrap();

    let target = root.join("sub/deep/file.rs");
    fs::write(&target, "").unwrap();

    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn finds_dot_botignore_toml() {
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("sub")).unwrap();
    fs::write(root.join(".botignore.toml"), "").unwrap();

    let target = root.join("sub/file.rs");
    fs::write(&target, "").unwrap();

    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn botignore_alone_does_not_stop_walk() {
    // A bare .botignore is a policy file, not a project boundary.
    // The walk should continue past it to find a real root marker.
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("a/b")).unwrap();
    fs::create_dir_all(root.join(".git")).unwrap();
    fs::write(root.join("a/.botignore"), "*.secret").unwrap();

    let target = root.join("a/b/file.rs");
    fs::write(&target, "").unwrap();

    // Should find root (with .git), NOT root/a (with .botignore)
    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn botignore_used_as_fallback() {
    // If only .botignore exists (no strong marker), it serves as a fallback
    // root so that policy is still enforced.
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("sub")).unwrap();
    fs::write(root.join(".botignore"), "*.secret").unwrap();

    let target = root.join("sub/file.rs");
    fs::write(&target, "").unwrap();

    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn strong_marker_preferred_over_botignore_fallback() {
    // .botignore at a/b/, .git at root — walk past .botignore, use root.
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("a/b/c")).unwrap();
    fs::create_dir_all(root.join(".git")).unwrap();
    fs::write(root.join("a/b/.botignore"), "*.key").unwrap();

    let target = root.join("a/b/c/file.rs");
    fs::write(&target, "").unwrap();

    // Should find root (with .git), not a/b (with .botignore)
    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn falls_back_to_git() {
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("sub")).unwrap();
    fs::create_dir_all(root.join(".git")).unwrap();

    let target = root.join("sub/file.rs");
    fs::write(&target, "").unwrap();

    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root);
}

#[test]
fn returns_none_when_no_marker() {
    let tmp = TempDir::new().unwrap();
    let target = tmp.path().join("file.rs");
    std::fs::write(&target, "").unwrap();
    assert!(find_project_root(&target).is_none());
}

#[test]
fn walks_up_from_file_path_not_cwd() {
    let tmp = TempDir::new().unwrap();
    let root = tmp.path();
    fs::create_dir_all(root.join("a/b/c")).unwrap();
    fs::write(root.join("a/botignore.toml"), "").unwrap();

    let target = root.join("a/b/c/file.rs");
    fs::write(&target, "").unwrap();

    let found = find_project_root(&target).unwrap();
    assert_eq!(found, root.join("a"));
}
