use super::*;
struct Fixture(PathBuf);
impl Fixture {
    fn new() -> Self {
        let path = std::env::temp_dir().join(format!(
            "vamp-resolver-test-{}-{}",
            std::process::id(),
            NEXT.fetch_add(1, Ordering::Relaxed)
        ));
        fs::create_dir(&path).unwrap();
        Self(path)
    }
    fn jj(&self, args: &[&str]) -> String {
        let output = Command::new("jj")
            .current_dir(&self.0)
            .env("JJ_CONFIG", "/dev/null")
            .args([
                "--config=user.name=Resolver",
                "--config=user.email=resolver@example.test",
                "--config=debug.commit-timestamp=\"2001-01-01T00:00:00Z\"",
                "--config=debug.operation-timestamp=\"2001-01-01T00:00:00Z\"",
            ])
            .args(args)
            .output()
            .unwrap();
        assert!(
            output.status.success(),
            "{}",
            String::from_utf8_lossy(&output.stderr)
        );
        String::from_utf8(output.stdout).unwrap()
    }
    fn conflict(&self) {
        self.jj(&["git", "init", "--no-colocate", "."]);
        self.jj(&["config", "set", "--repo", "user.name", "Resolver"]);
        self.jj(&[
            "config",
            "set",
            "--repo",
            "user.email",
            "resolver@example.test",
        ]);
        self.jj(&[
            "config",
            "set",
            "--repo",
            "debug.commit-timestamp",
            "\"2001-01-01T00:00:00Z\"",
        ]);
        self.jj(&[
            "config",
            "set",
            "--repo",
            "debug.operation-timestamp",
            "\"2001-01-01T00:00:00Z\"",
        ]);
        fs::write(self.0.join("file"), "base\n").unwrap();
        self.jj(&["bookmark", "create", "base"]);
        self.jj(&["new", "base"]);
        fs::write(self.0.join("file"), "left\n").unwrap();
        self.jj(&["bookmark", "create", "left"]);
        self.jj(&["new", "base"]);
        fs::write(self.0.join("file"), "right\n").unwrap();
        self.jj(&["bookmark", "create", "right"]);
        self.jj(&["new", "left", "right"]);
    }
}
impl Drop for Fixture {
    fn drop(&mut self) {
        let _ = fs::remove_dir_all(&self.0);
    }
}
#[test]
fn discovery_is_readonly_and_save_uses_jj_authority_and_stale_guards() {
    let fixture = Fixture::new();
    fixture.conflict();
    let operation = fixture.jj(&[
        "--ignore-working-copy",
        "op",
        "log",
        "--no-graph",
        "-n",
        "1",
        "-T",
        "id",
    ]);
    let workspace = load(&fixture.0, &|| false).unwrap();
    assert_eq!(workspace.files.len(), 1);
    let file = &workspace.files[0];
    assert!(file.sources.iter().any(|s| s.base && s.bytes == b"base\n"));
    assert!(file.sources.iter().any(|s| !s.base && s.bytes == b"left\n"));
    assert!(
        file.sources
            .iter()
            .any(|s| !s.base && s.bytes == b"right\n")
    );
    for bookmark in ["base", "left", "right"] {
        assert!(
            file.sources
                .iter()
                .any(|s| s.label.contains(&format!("[{bookmark}]")))
        );
    }
    assert_eq!(
        operation,
        fixture.jj(&[
            "--ignore-working-copy",
            "op",
            "log",
            "--no-graph",
            "-n",
            "1",
            "-T",
            "id"
        ])
    );
    let blocks = regions(file.result.as_ref().unwrap());
    assert_eq!(blocks.len(), 1);
    for source in &file.sources {
        assert_eq!(blocks[0].choose(source).unwrap().as_bytes(), source.bytes);
    }
    let mut changed = blocks[0].clone();
    changed.sides.pop();
    assert!(changed.choose(&file.sources[0]).is_err());
    fs::write(fixture.0.join("file"), "external\n").unwrap();
    assert!(
        save(&workspace, 0, Resolution::Text("lost\n".into()), &|| false)
            .unwrap_err()
            .contains("externally")
    );
    fs::write(fixture.0.join("file"), file.result.as_ref().unwrap()).unwrap();
    fixture.jj(&["new", "base"]);
    let before = fs::read(fixture.0.join("file")).unwrap();
    assert!(
        save(
            &workspace,
            0,
            Resolution::Text("wrong checkout\n".into()),
            &|| false
        )
        .unwrap_err()
        .contains("checkout changed")
    );
    assert_eq!(fs::read(fixture.0.join("file")).unwrap(), before);
}
#[test]
fn text_choice_is_confirmed_by_jj() {
    let fixture = Fixture::new();
    fixture.conflict();
    let mut workspace = load(&fixture.0, &|| false).unwrap();
    let cancelled_after_write =
        || fs::read(fixture.0.join("file")).is_ok_and(|bytes| bytes == b"draft\n");
    let saved = save(
        &workspace,
        0,
        Resolution::Text("draft\n".into()),
        &cancelled_after_write,
    )
    .unwrap();
    assert_eq!(saved.file.status, Status::Unconfirmed);
    assert!(saved.confirmation.is_some());
    assert_eq!(fs::read(fixture.0.join("file")).unwrap(), b"draft\n");
    assert_eq!(
        entries(&fixture.0, &workspace.checkout.commit, &|| false).unwrap(),
        [PathBuf::from("file")]
    );
    workspace.checkout = saved.checkout;
    workspace.files[0] = saved.file;
    let outcome = save(
        &workspace,
        0,
        Resolution::Text("resolved\n".into()),
        &|| false,
    )
    .unwrap();
    assert_eq!(
        outcome.file.status,
        Status::Resolved,
        "{:?}",
        outcome.confirmation
    );
    assert_eq!(fs::read(fixture.0.join("file")).unwrap(), b"resolved\n");
    assert!(
        entries(&fixture.0, &outcome.checkout.commit, &|| false)
            .unwrap()
            .is_empty()
    );
}
#[test]
fn all_three_sides_and_bases_are_loaded_and_directory_children_are_protected() {
    let fixture = Fixture::new();
    fixture.conflict();
    fixture.jj(&["new", "base"]);
    fs::write(fixture.0.join("file"), "third\n").unwrap();
    fixture.jj(&["bookmark", "create", "third"]);
    fixture.jj(&["new", "left", "right", "third"]);
    let workspace = load(&fixture.0, &|| false).unwrap();
    let file = &workspace.files[0];
    assert_eq!(file.sources.iter().filter(|s| !s.base).count(), 3);
    assert_eq!(file.sources.iter().filter(|s| s.base).count(), 2);
    assert!(file.sources.iter().any(|s| s.bytes == b"third\n"));
    let blocks = regions(file.result.as_ref().unwrap());
    for source in &file.sources {
        assert_eq!(blocks[0].choose(source).unwrap().as_bytes(), source.bytes);
    }
    fs::remove_file(fixture.0.join("file")).unwrap();
    fs::create_dir(fixture.0.join("file")).unwrap();
    fs::write(fixture.0.join("file/untracked"), b"keep my draft").unwrap();
    let workspace = load(&fixture.0, &|| false).unwrap();
    assert!(
        save(&workspace, 0, Resolution::Source(0), &|| false)
            .unwrap_err()
            .contains("untracked or modified children")
    );
    assert_eq!(
        fs::read(fixture.0.join("file/untracked")).unwrap(),
        b"keep my draft"
    );
}
#[test]
fn binary_symlink_and_deleted_file_choices_preserve_types_and_bytes() {
    let fixture = Fixture::new();
    fixture.conflict();
    fixture.jj(&["edit", "left"]);
    fs::write(fixture.0.join("binary"), b"left\0\xff").unwrap();
    {
        use std::os::unix::fs::PermissionsExt;
        fs::set_permissions(fixture.0.join("binary"), fs::Permissions::from_mode(0o755)).unwrap();
    }
    std::os::unix::fs::symlink("left-target", fixture.0.join("link")).unwrap();
    fixture.jj(&["new", "right"]);
    fs::write(fixture.0.join("binary"), b"right\0\xfe").unwrap();
    std::os::unix::fs::symlink("right-target", fixture.0.join("link")).unwrap();
    fixture.jj(&["bookmark", "create", "right-extra"]);
    fixture.jj(&["new", "left", "right-extra"]);
    let mut workspace = load(&fixture.0, &|| false).unwrap();
    for (name, kind, bytes) in [
        ("binary", FileKind::Binary, b"left\0\xff".as_slice()),
        ("link", FileKind::Symlink, b"left-target".as_slice()),
    ] {
        let file = workspace
            .files
            .iter()
            .position(|f| f.path == Path::new(name))
            .unwrap();
        assert!(workspace.files[file].result.is_none());
        let source = workspace.files[file]
            .sources
            .iter()
            .position(|s| !s.base && s.kind == kind && s.bytes == bytes)
            .unwrap();
        assert!(
            save(
                &workspace,
                file,
                Resolution::Text("not allowed".into()),
                &|| false
            )
            .is_err()
        );
        let outcome = save(&workspace, file, Resolution::Source(source), &|| false).unwrap();
        assert_eq!(
            outcome.file.status,
            Status::Resolved,
            "{:?}",
            outcome.confirmation
        );
        workspace.checkout = outcome.checkout;
        workspace.files[file] = outcome.file;
        if kind == FileKind::Symlink {
            assert_eq!(
                fs::read_link(fixture.0.join(name)).unwrap(),
                Path::new("left-target")
            );
        } else {
            assert_eq!(fs::read(fixture.0.join(name)).unwrap(), bytes);
        }
        if kind == FileKind::Binary {
            use std::os::unix::fs::PermissionsExt;
            assert_eq!(
                fs::metadata(fixture.0.join(name))
                    .unwrap()
                    .permissions()
                    .mode()
                    & 0o111,
                0o111
            );
        }
    }
    // add/add conflicts retain an absent base as an explicit deletion choice.
    let file = workspace
        .files
        .iter()
        .position(|f| f.path == Path::new("binary"))
        .unwrap();
    let source = workspace.files[file]
        .sources
        .iter()
        .position(|s| s.kind == FileKind::Deleted)
        .unwrap();
    let outcome = save(&workspace, file, Resolution::Source(source), &|| false).unwrap();
    assert_eq!(
        outcome.file.status,
        Status::Resolved,
        "{:?}",
        outcome.confirmation
    );
    assert!(!fixture.0.join("binary").exists());
}
#[test]
fn marker_styles_widths_multisides_and_missing_eol() {
    let snapshot = "before\n<<<<<<<<<<< conflict 1 of 1\n+++++++++++ a\nleft\n----------- base\nold\n+++++++++++ b\nright\n----------- base2\nold2\n+++++++++++ c\nthird\n>>>>>>>>>>> conflict 1 of 1 ends\nafter\n";
    let parsed = regions(snapshot);
    assert_eq!(parsed[0].lines, 1..13);
    assert_eq!(parsed[0].sides, ["left\n", "right\n", "third\n"]);
    assert_eq!(parsed[0].bases, ["old\n", "old2\n"]);
    let prefixed = format!("<<<<<<< literal marker\n{snapshot}");
    assert_eq!(regions(&prefixed).len(), 1);
    assert_eq!(regions(&prefixed)[0].lines, 2..14);
    let diff = "<<<<<<< conflict 1 of 1\n%%%%%%% diff from: base\n^^^^^^^        to: left\n-old\n+left\n+++++++ right\nright\n>>>>>>> conflict 1 of 1 ends\n";
    assert_eq!(regions(diff)[0].sides, ["left\n", "right\n"]);
    let git = "<<<<<<< left\nleft\n||||||| base\nold\n=======\nright\n>>>>>>> right";
    assert_eq!(regions(git)[0].sides, ["left", "right"]);
    assert!(regions("<<<<<<< unfinished\nleft\n").is_empty());
}