pinready 0.27.6

// Visual Pinball release checker, downloader, and installer.
// Queries a GitHub fork for releases and downloads the correct artifact
// for the current platform.

use anyhow::{Context, Result, bail};
use crossbeam_channel::Sender;
use regex::Regex;
use std::io::Read;
use std::path::{Path, PathBuf};
use std::sync::OnceLock;

/// Default GitHub repository for Visual Pinball releases.
pub const DEFAULT_FORK_REPO: &str = "Le-Syl21/vpinball";

/// Information about a GitHub release.
#[derive(Debug, Clone)]
pub struct ReleaseInfo {
    pub tag: String,
    pub asset_name: String,
    pub asset_url: String,
    pub asset_size: u64,
}

/// Parse VPX `--version` output into a version string mirroring the release artifact tag format.
///
/// Input:  `Starting VPX - v10.8.1 Beta (Rev. 4955 (da4e2db), macos BGFX 64bits)`
/// Output: `v10.8.1-4955-da4e2db`
///
/// Falls back to just the version number if the revision or SHA cannot be found.
#[cfg(any(test, not(target_os = "windows")))]
fn parse_vpx_version_output(s: &str) -> Option<String> {
    static VPX_VERSION_RE: OnceLock<Regex> = OnceLock::new();
    let re = VPX_VERSION_RE.get_or_init(|| {
        Regex::new(r"(?x)\b(?P<ver>v\d+\.\d+\.\d+)\b(?:.*?\bRev\.\s*(?P<rev>\d+)\s*\((?P<sha>[0-9A-Fa-f]{7})\))?")
        .expect("valid VPX version regex")
    });

    let caps = re.captures(s)?;
    let base = caps.name("ver")?.as_str();

    match (caps.name("rev"), caps.name("sha")) {
        (Some(rev), Some(sha)) => Some(format!("{}-{}-{}", base, rev.as_str(), sha.as_str())),
        _ => Some(base.to_string()),
    }
}

#[cfg(any(test, target_os = "windows"))]
fn parse_vpx_product_version(s: &str) -> Option<String> {
    let cleaned = s.trim_matches('\0').trim();
    if cleaned.is_empty() {
        return None;
    }

    static PRODUCT_VERSION_RE: OnceLock<Regex> = OnceLock::new();
    let re = PRODUCT_VERSION_RE.get_or_init(|| {
        Regex::new(r"^(?P<base>\d+\.\d+\.\d+)\.(?P<rev>\d+)\.(?P<sha>[0-9a-fA-F]+)$")
            .expect("valid product version regex")
    });

    let caps = re.captures(cleaned)?;
    let base = caps.name("base")?.as_str();
    let rev = caps.name("rev")?.as_str();
    let sha = caps.name("sha")?.as_str().to_ascii_lowercase();
    Some(format!("v{base}-{rev}-{sha}"))
}

#[cfg(target_os = "windows")]
fn query_windows_file_version(exe_path: &Path) -> Option<String> {
    use std::ffi::OsStr;
    use std::os::windows::ffi::OsStrExt;
    use std::ptr;
    use winapi::shared::minwindef::{DWORD, LPVOID, UINT};
    use winapi::um::winver::{GetFileVersionInfoSizeW, GetFileVersionInfoW, VerQueryValueW};

    fn query_string_value(buffer: &[u8], sub_block: &str) -> Option<String> {
        let mut value_ptr: LPVOID = ptr::null_mut();
        let mut value_len: UINT = 0;
        let sub_block_wide: Vec<u16> = sub_block.encode_utf16().chain(Some(0)).collect();

        let queried = unsafe {
            VerQueryValueW(
                buffer.as_ptr() as *const _,
                sub_block_wide.as_ptr(),
                &mut value_ptr,
                &mut value_len,
            )
        };
        if queried == 0 || value_ptr.is_null() || value_len == 0 {
            return None;
        }

        let raw =
            unsafe { std::slice::from_raw_parts(value_ptr as *const u16, value_len as usize) };
        let text = String::from_utf16_lossy(raw);
        Some(text.trim_matches('\0').trim().to_string())
    }

    let wide_path: Vec<u16> = OsStr::new(exe_path).encode_wide().chain(Some(0)).collect();

    let mut handle: DWORD = 0;
    let info_size = unsafe { GetFileVersionInfoSizeW(wide_path.as_ptr(), &mut handle) };
    if info_size == 0 {
        return None;
    }

    let mut buffer = vec![0u8; info_size as usize];
    let got_info = unsafe {
        GetFileVersionInfoW(
            wide_path.as_ptr(),
            0,
            info_size,
            buffer.as_mut_ptr() as LPVOID,
        )
    };
    if got_info == 0 {
        return None;
    }

    // Keep lookup deterministic and simple: use the English string table.
    query_string_value(&buffer, "\\StringFileInfo\\040904B0\\ProductVersion")
        .and_then(|product| parse_vpx_product_version(&product))
}

/// Progress updates sent during download/install.
pub enum UpdateProgress {
    Downloading(u64, u64), // (bytes_downloaded, total_bytes)
    Extracting,
    Done(PathBuf), // path to the installed executable
    Error(String),
}

// ---------------------------------------------------------------------------
// Platform detection
// ---------------------------------------------------------------------------

/// File extension of the artifact for the current platform.
fn artifact_extension() -> &'static str {
    if cfg!(target_os = "windows") {
        "zip"
    } else if cfg!(target_os = "macos") {
        "dmg"
    } else {
        "tar.gz"
    }
}

/// Returns (platform, arch) strings matching the workflow artifact names.
fn platform_arch() -> (&'static str, &'static str) {
    let platform = if cfg!(target_os = "linux") {
        "linux"
    } else if cfg!(target_os = "windows") {
        "windows"
    } else if cfg!(target_os = "macos") {
        "macos"
    } else {
        "unknown"
    };

    let arch = if cfg!(target_arch = "x86_64") {
        "x64"
    } else if cfg!(target_arch = "x86") {
        "x86"
    } else if cfg!(target_arch = "aarch64") {
        detect_arm_board()
    } else {
        "unknown"
    };

    (platform, arch)
}

/// On aarch64 Linux, distinguish between RPi and RK3588 SBCs by reading
/// the device-tree model string. Falls back to "aarch64" on other OSes.
#[cfg(target_arch = "aarch64")]
fn detect_arm_board() -> &'static str {
    // Only relevant on Linux SBCs
    if cfg!(target_os = "linux") {
        if let Ok(model) = std::fs::read_to_string("/proc/device-tree/model") {
            let lower = model.to_lowercase();
            if lower.contains("raspberry") {
                return "rpi-linux-aarch64";
            }
            if lower.contains("rk3588") || lower.contains("rock") || lower.contains("orange pi 5") {
                return "rk3588-linux-aarch64";
            }
        }
        // Generic ARM Linux — try RPi as default
        "rpi-linux-aarch64"
    } else if cfg!(target_os = "macos") {
        // The VPX fork ships macOS ARM builds as `macos-arm64-Release.dmg`,
        // not `macos-aarch64`. Keep the matching name here even though the
        // PinReady CI itself standardized to `aarch64` for Homebrew.
        "arm64"
    } else {
        "aarch64"
    }
}

#[cfg(not(target_arch = "aarch64"))]
fn detect_arm_board() -> &'static str {
    "unknown"
}

// ---------------------------------------------------------------------------
// For aarch64, the artifact name needs special handling because the board
// name is embedded differently. Override artifact_name for SBC builds.
// ---------------------------------------------------------------------------

// On aarch64 Linux, the artifact name includes the board type:
// `VPinballX_BGFX-{tag}-rpi-linux-aarch64-Release.zip`
// On other platforms, the standard format is used.
// This function handles both cases correctly because `platform_arch()`
// already returns the full board-platform-arch triple for SBCs.

// ---------------------------------------------------------------------------
// GitHub API
// ---------------------------------------------------------------------------

/// Check the latest release on a GitHub repository.
/// This is a blocking call — run it from a background thread.
pub fn check_latest_release(repo: &str) -> Result<ReleaseInfo> {
    // Use /releases (not /releases/latest) because the latest release may be
    // marked as a pre-release, which /releases/latest silently skips.
    let url = format!("https://api.github.com/repos/{repo}/releases?per_page=1");

    let response = ureq::get(&url)
        .header("User-Agent", "PinReady")
        .header("Accept", "application/vnd.github.v3+json")
        .call()
        .context("Failed to query GitHub releases")?;

    let body = response.into_body().read_to_string()?;
    let releases: serde_json::Value =
        serde_json::from_str(&body).context("Failed to parse GitHub release JSON")?;

    let json = releases
        .as_array()
        .and_then(|arr| arr.first())
        .context("No releases found")?;

    let tag = json["tag_name"]
        .as_str()
        .context("Missing tag_name in release")?
        .to_string();

    // Find the matching asset for this platform by pattern
    // Assets may have different version numbers than the release tag,
    // so we match on the platform/arch/extension suffix.
    let (platform, arch) = platform_arch();
    let ext = artifact_extension();
    let suffix = format!("-{platform}-{arch}-Release.{ext}");
    let prefix = "VPinballX_BGFX-";

    let assets = json["assets"]
        .as_array()
        .context("Missing assets in release")?;

    for asset in assets {
        let name = asset["name"].as_str().unwrap_or_default();
        if name.starts_with(prefix) && name.ends_with(&suffix) {
            let url = asset["browser_download_url"]
                .as_str()
                .context("Missing download URL")?
                .to_string();
            let size = asset["size"].as_u64().unwrap_or(0);

            return Ok(ReleaseInfo {
                tag,
                asset_name: name.to_string(),
                asset_url: url,
                asset_size: size,
            });
        }
    }

    bail!(
        "No matching asset for this platform (expected: {prefix}*{suffix}). \
         Available: {}",
        assets
            .iter()
            .filter_map(|a| a["name"].as_str())
            .collect::<Vec<_>>()
            .join(", ")
    )
}

// ---------------------------------------------------------------------------
// Download & install
// ---------------------------------------------------------------------------

/// Default installation directory for Visual Pinball.
pub fn default_install_dir() -> PathBuf {
    let home = std::env::var("HOME")
        .or_else(|_| std::env::var("USERPROFILE"))
        .unwrap_or_else(|_| ".".into());
    PathBuf::from(home).join("Visual_Pinball")
}

/// Resolve the real executable path from a user-provided path.
/// On macOS, if the path points to a `.app` bundle, look inside
/// `Contents/MacOS/` for the actual binary.
pub fn resolve_vpx_exe(path: &Path) -> PathBuf {
    let p = PathBuf::from(path);
    if cfg!(target_os = "macos")
        && let Some(ext) = p.extension()
        && ext == "app"
        && p.is_dir()
    {
        let macos_dir = p.join("Contents/MacOS");
        if let Ok(entries) = std::fs::read_dir(&macos_dir) {
            for entry in entries.flatten() {
                let name = entry.file_name();
                let name_str = name.to_string_lossy();
                if name_str.starts_with("VPinballX") {
                    return entry.path();
                }
            }
        }
    }
    p
}

/// Name of the main Visual Pinball executable for the current platform.
pub fn vpx_executable_name() -> &'static str {
    if cfg!(target_os = "windows") {
        if cfg!(target_arch = "x86_64") {
            "VPinballX_BGFX64.exe"
        } else {
            "VPinballX_BGFX.exe"
        }
    } else {
        "VPinballX_BGFX"
    }
}

/// Why an install into a user-chosen folder failed, when the OS says so.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum InstallFailure {
    /// Windows error 5 / EACCES: no write access to the folder.
    Denied,
    /// Windows error 3 / ENOENT: the path can't be reached.
    NotFound,
}

/// Look through an install error for the I/O error behind it.
pub fn classify_install_error(err: &anyhow::Error) -> Option<InstallFailure> {
    err.chain()
        .filter_map(|e| e.downcast_ref::<std::io::Error>())
        .find_map(|io| match io.kind() {
            std::io::ErrorKind::PermissionDenied => Some(InstallFailure::Denied),
            std::io::ErrorKind::NotFound => Some(InstallFailure::NotFound),
            _ => None,
        })
}

/// Download a release asset and extract it into `install_dir`.
/// Sends progress updates through `progress_tx`.
/// This is a blocking call — run it from a background thread.
pub fn download_and_install(
    release: &ReleaseInfo,
    install_dir: &Path,
    progress_tx: Sender<UpdateProgress>,
) -> Result<()> {
    // Download to the system temp folder: a normal user can create a folder
    // in the root of C:\ (C:\VPinball) but not a file there, so a zip next
    // to the install folder was refused with "Access denied" (OS error 5).
    let tmp_path =
        std::env::temp_dir().join(format!(".pinready_vpx_download_{}.zip", std::process::id()));

    let result = download_and_install_inner(release, install_dir, &tmp_path, &progress_tx);

    // Clean up temp file
    let _ = std::fs::remove_file(&tmp_path);

    result
}

fn download_and_install_inner(
    release: &ReleaseInfo,
    install_dir: &Path,
    tmp_path: &Path,
    progress_tx: &Sender<UpdateProgress>,
) -> Result<()> {
    // Download
    let response = ureq::get(&release.asset_url)
        .header("User-Agent", "PinReady")
        .header("Accept", "application/octet-stream")
        .call()
        .context("Failed to download release asset")?;

    let total = release.asset_size;
    let mut downloaded: u64 = 0;
    let mut file = std::fs::File::create(tmp_path)?;
    let mut buf = [0u8; 32768];

    let mut reader = response.into_body().into_reader();
    loop {
        let n = reader.read(&mut buf)?;
        if n == 0 {
            break;
        }
        std::io::Write::write_all(&mut file, &buf[..n])?;
        downloaded += n as u64;
        let _ = progress_tx.send(UpdateProgress::Downloading(downloaded, total));
    }
    drop(file);

    // Extract
    let _ = progress_tx.send(UpdateProgress::Extracting);

    std::fs::create_dir_all(install_dir)?;

    let ext = artifact_extension();
    if ext == "tar.gz" {
        extract_tar_gz(tmp_path, install_dir)?;
    } else if ext == "zip" {
        extract_zip(tmp_path, install_dir)?;
    } else {
        // dmg — just copy the file, user will mount manually
        let dest = install_dir.join(tmp_path.file_name().unwrap_or_default());
        std::fs::copy(tmp_path, &dest)?;
    }

    // Make sure the main executable is executable on Unix
    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt;
        let exe_path = install_dir.join(vpx_executable_name());
        if exe_path.exists() {
            std::fs::set_permissions(&exe_path, std::fs::Permissions::from_mode(0o755))?;
        }
    }

    let exe_path = install_dir.join(vpx_executable_name());
    let _ = progress_tx.send(UpdateProgress::Done(exe_path));

    Ok(())
}

pub(crate) fn extract_tar_gz(archive_path: &Path, dest: &Path) -> Result<()> {
    let file = std::fs::File::open(archive_path)?;
    let gz = flate2::read::GzDecoder::new(file);
    let mut archive = tar::Archive::new(gz);
    archive.set_preserve_permissions(true);
    archive.unpack(dest).context("Failed to extract tar.gz")?;
    Ok(())
}

pub(crate) fn extract_zip(archive_path: &Path, dest: &Path) -> Result<()> {
    let file = std::fs::File::open(archive_path)?;
    let mut archive = zip::ZipArchive::new(file).context("Failed to open zip archive")?;

    for i in 0..archive.len() {
        let mut entry = archive.by_index(i)?;
        let name = entry.name()?.into_owned();
        let out_path = dest.join(&name);

        if entry.is_dir() {
            std::fs::create_dir_all(&out_path)?;
        } else {
            if let Some(parent) = out_path.parent() {
                std::fs::create_dir_all(parent)?;
            }
            let mut out_file = std::fs::File::create(&out_path)?;
            std::io::copy(&mut entry, &mut out_file)?;

            #[cfg(unix)]
            {
                use std::os::unix::fs::PermissionsExt;
                if let Some(mode) = entry.unix_mode() {
                    std::fs::set_permissions(&out_path, std::fs::Permissions::from_mode(mode))?;
                }
            }
        }
    }
    Ok(())
}

/// Query the version from a manually installed VPX executable.
///
/// On Windows, reads ProductVersion from the executable version resource
/// (without launching the GUI executable).
/// On other platforms, runs `--version` and parses output like:
/// `Starting VPX - v10.8.1 Beta (Rev. 4955 (da4e2db), macos BGFX 64bits)`.
pub fn query_vpx_version(exe_path: &str) -> Option<String> {
    let exe_path = resolve_vpx_exe(Path::new(exe_path));

    #[cfg(target_os = "windows")]
    {
        query_windows_file_version(&exe_path)
    }

    #[cfg(not(target_os = "windows"))]
    {
        use std::process::Command;

        let output = Command::new(&exe_path).arg("--version").output().ok()?;
        let stdout = String::from_utf8_lossy(&output.stdout);
        let stderr = String::from_utf8_lossy(&output.stderr);
        let combined = format!("{}{}", stdout, stderr);
        parse_vpx_version_output(&combined)
    }
}

// ---------------------------------------------------------------------------
// PinReady self-update
// ---------------------------------------------------------------------------

/// GitHub repository where PinReady releases live.
pub const PINREADY_REPO: &str = "Le-Syl21/PinReady";

/// Compile-time PinReady version (matches Cargo.toml, no `v` prefix).
pub const CURRENT_PINREADY_VERSION: &str = env!("CARGO_PKG_VERSION");

/// Expected release asset name for this platform.
///
/// Mirrors CI's artifact naming:
///   pinready-linux-x86_64.tar.gz
///   pinready-linux-aarch64.tar.gz
///   pinready-macos-aarch64.tar.gz
///   pinready-macos-x86_64.tar.gz
///   pinready-windows-x86_64.zip
fn pinready_asset_name() -> String {
    let os = if cfg!(target_os = "linux") {
        "linux"
    } else if cfg!(target_os = "macos") {
        "macos"
    } else if cfg!(target_os = "windows") {
        "windows"
    } else {
        "unknown"
    };
    let arch = if cfg!(target_arch = "x86_64") {
        "x86_64"
    } else if cfg!(target_arch = "aarch64") {
        "aarch64"
    } else {
        "unknown"
    };
    let ext = if cfg!(target_os = "windows") {
        "zip"
    } else {
        "tar.gz"
    };
    format!("pinready-{os}-{arch}.{ext}")
}

/// Internal binary name inside the release archive.
fn pinready_binary_name() -> &'static str {
    if cfg!(target_os = "windows") {
        "pinready.exe"
    } else {
        "pinready"
    }
}

/// Query the PinReady repository for the latest release + matching asset.
pub fn check_pinready_release() -> Result<ReleaseInfo> {
    let url = format!("https://api.github.com/repos/{PINREADY_REPO}/releases?per_page=1");

    let response = ureq::get(&url)
        .header("User-Agent", "PinReady")
        .header("Accept", "application/vnd.github.v3+json")
        .call()
        .context("Failed to query GitHub releases")?;

    let body = response.into_body().read_to_string()?;
    let releases: serde_json::Value =
        serde_json::from_str(&body).context("Failed to parse GitHub release JSON")?;

    let json = releases
        .as_array()
        .and_then(|arr| arr.first())
        .context("No PinReady releases found")?;

    let tag = json["tag_name"]
        .as_str()
        .context("Missing tag_name in release")?
        .to_string();

    let target = pinready_asset_name();
    let assets = json["assets"]
        .as_array()
        .context("Missing assets in release")?;

    for asset in assets {
        let name = asset["name"].as_str().unwrap_or_default();
        if name == target {
            let url = asset["browser_download_url"]
                .as_str()
                .context("Missing download URL")?
                .to_string();
            let size = asset["size"].as_u64().unwrap_or(0);
            return Ok(ReleaseInfo {
                tag,
                asset_name: name.to_string(),
                asset_url: url,
                asset_size: size,
            });
        }
    }

    bail!(
        "No PinReady asset named {target}. Available: {}",
        assets
            .iter()
            .filter_map(|a| a["name"].as_str())
            .collect::<Vec<_>>()
            .join(", ")
    )
}

/// Returns true if the remote release tag differs from the running version.
/// Tag format on releases is `v0.6.2`; `CURRENT_PINREADY_VERSION` has no `v` prefix.
pub fn is_pinready_update_available(release: &ReleaseInfo) -> bool {
    release.tag.trim_start_matches('v') != CURRENT_PINREADY_VERSION
}

/// Download the PinReady release, extract the binary, swap the running
/// executable via `self_replace`, and spawn a fresh instance. The caller
/// must `std::process::exit(0)` immediately after this returns Ok(()).
pub fn download_pinready_and_replace(
    release: &ReleaseInfo,
    progress_tx: Sender<UpdateProgress>,
) -> Result<()> {
    let tmp_dir = std::env::temp_dir();
    let archive_path = tmp_dir.join(&release.asset_name);
    let new_binary_path = tmp_dir.join(format!("pinready_new_{}", std::process::id()));

    // Download
    let response = ureq::get(&release.asset_url)
        .header("User-Agent", "PinReady")
        .header("Accept", "application/octet-stream")
        .call()
        .context("Failed to download PinReady release")?;

    let total = release.asset_size;
    let mut downloaded: u64 = 0;
    let mut file = std::fs::File::create(&archive_path)?;
    let mut buf = [0u8; 32768];
    let mut reader = response.into_body().into_reader();
    loop {
        let n = reader.read(&mut buf)?;
        if n == 0 {
            break;
        }
        std::io::Write::write_all(&mut file, &buf[..n])?;
        downloaded += n as u64;
        let _ = progress_tx.send(UpdateProgress::Downloading(downloaded, total));
    }
    drop(file);

    log::info!(
        "PinReady update: downloaded {} bytes to {}",
        downloaded,
        archive_path.display()
    );
    let _ = progress_tx.send(UpdateProgress::Extracting);

    // Extract binary to a known temp path
    extract_pinready_binary(&archive_path, &new_binary_path, pinready_binary_name())?;
    log::info!(
        "PinReady update: extracted binary to {}",
        new_binary_path.display()
    );

    // Make executable on unix
    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt;
        std::fs::set_permissions(&new_binary_path, std::fs::Permissions::from_mode(0o755))?;
    }

    // Capture the running binary path BEFORE self_replace. On Linux,
    // self_replace unlink()s the original inode and creates a new file at
    // the same path; once that's done, /proc/self/exe still resolves but
    // its readlink suffix becomes " (deleted)" — and std::env::current_exe()
    // returns that literal string with the suffix included, which is not a
    // valid filesystem path. Spawning it fails with ENOENT and the update
    // silently aborts. Reading current_exe() before the swap dodges that.
    let exe = std::env::current_exe().context("Failed to resolve current exe")?;

    // Swap the running binary. self_replace handles the Windows rename-trick
    // and atomic rename on unix.
    self_replace::self_replace(&new_binary_path)
        .context("Failed to swap the running PinReady binary")?;
    log::info!(
        "PinReady update: self_replace done, relaunching from {}",
        exe.display()
    );

    // Spawn a fresh instance using the *new* binary (now at current_exe()).
    // The caller is expected to exit(0) so this new process becomes the
    // user-facing one. We pass `--from-update` so the new process knows
    // to retry the PID-lock acquisition for ~5 s — without that, the new
    // process races against this one's flock release, sees AlreadyRunning,
    // sends a focus request to us (we're about to exit), and quits
    // silently. End result: no PinReady running after update.
    let child = std::process::Command::new(&exe)
        .arg("--from-update")
        .spawn()
        .context("Failed to relaunch PinReady")?;
    log::info!(
        "PinReady update: spawned child PID {} via {} --from-update",
        child.id(),
        exe.display()
    );

    // Cleanup temp files (best effort — don't fail the update if cleanup fails)
    let _ = std::fs::remove_file(&archive_path);
    let _ = std::fs::remove_file(&new_binary_path);

    let _ = progress_tx.send(UpdateProgress::Done(std::path::PathBuf::new()));
    Ok(())
}

fn extract_pinready_binary(archive: &Path, dest: &Path, binary_name: &str) -> Result<()> {
    let ext = archive.extension().and_then(|s| s.to_str()).unwrap_or("");
    if ext == "zip" {
        let file = std::fs::File::open(archive)?;
        let mut zip = zip::ZipArchive::new(file)?;
        for i in 0..zip.len() {
            let mut entry = zip.by_index(i)?;
            // Match by the trailing component so we tolerate archives with a
            // top-level directory.
            let name = entry.name()?.into_owned();
            if name == binary_name || name.ends_with(&format!("/{binary_name}")) {
                let mut out = std::fs::File::create(dest)?;
                std::io::copy(&mut entry, &mut out)?;
                return Ok(());
            }
        }
    } else {
        // Assume tar.gz
        let file = std::fs::File::open(archive)?;
        let gz = flate2::read::GzDecoder::new(file);
        let mut tar = tar::Archive::new(gz);
        for entry in tar.entries()? {
            let mut entry = entry?;
            let path = entry.path()?.to_path_buf();
            let matches = path
                .file_name()
                .and_then(|s| s.to_str())
                .is_some_and(|n| n == binary_name);
            if matches {
                let mut out = std::fs::File::create(dest)?;
                std::io::copy(&mut entry, &mut out)?;
                return Ok(());
            }
        }
    }
    bail!("Binary {binary_name} not found in {}", archive.display())
}

#[cfg(test)]
mod version_tests {
    use super::*;

    #[test]
    fn full_vpx_output_produces_artifact_tag_format() {
        assert_eq!(
            parse_vpx_version_output(
                "Starting VPX - v10.8.1 Beta (Rev. 4955 (da4e2db), macos BGFX 64bits)"
            ),
            Some("v10.8.1-4955-da4e2db".to_string())
        );
    }

    #[test]
    fn version_only_fallback_when_no_rev_sha() {
        assert_eq!(
            parse_vpx_version_output("v10.8.1"),
            Some("v10.8.1".to_string())
        );
    }

    #[test]
    fn returns_none_for_unparseable_output() {
        assert_eq!(parse_vpx_version_output("invalid"), None);
        assert_eq!(parse_vpx_version_output("4955"), None);
    }

    #[test]
    fn product_version_dot_format_is_normalized() {
        assert_eq!(
            parse_vpx_product_version("10.8.1.4957.db2a00"),
            Some("v10.8.1-4957-db2a00".to_string())
        );
        assert_eq!(
            parse_vpx_product_version("Visual Pinball BGFX 10.8.1"),
            None
        );
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use std::io::Write;

    #[test]
    fn default_fork_repo_is_set() {
        assert!(!DEFAULT_FORK_REPO.is_empty());
        assert!(DEFAULT_FORK_REPO.contains('/'));
    }

    #[test]
    fn artifact_extension_linux() {
        // On Linux where tests run
        let ext = artifact_extension();
        assert!(
            ext == "tar.gz" || ext == "zip" || ext == "dmg",
            "unexpected extension: {ext}"
        );
    }

    #[test]
    fn platform_arch_returns_known_values() {
        let (platform, arch) = platform_arch();
        assert!(
            ["linux", "windows", "macos", "unknown"].contains(&platform),
            "unexpected platform: {platform}"
        );
        assert!(!arch.is_empty(), "arch should not be empty");
    }

    #[test]
    fn vpx_executable_name_not_empty() {
        let name = vpx_executable_name();
        assert!(!name.is_empty());
        assert!(
            name.starts_with("VPinballX"),
            "expected VPinballX prefix: {name}"
        );
    }

    #[test]
    fn install_errors_are_classified() {
        use std::io::{Error, ErrorKind};
        let denied = anyhow::Error::new(Error::from(ErrorKind::PermissionDenied));
        assert_eq!(
            classify_install_error(&denied),
            Some(InstallFailure::Denied)
        );
        let missing = anyhow::Error::new(Error::from(ErrorKind::NotFound)).context("extract");
        assert_eq!(
            classify_install_error(&missing),
            Some(InstallFailure::NotFound)
        );
        let other = anyhow::anyhow!("network down");
        assert_eq!(classify_install_error(&other), None);
    }

    #[test]
    fn default_install_dir_contains_visual_pinball() {
        let dir = default_install_dir();
        let s = dir.to_string_lossy();
        assert!(
            s.contains("Visual_Pinball"),
            "expected Visual_Pinball in: {s}"
        );
    }

    #[test]
    fn resolve_vpx_exe_returns_same_on_linux() {
        // On Linux, resolve_vpx_exe should return the path unchanged
        let path = Path::new("/usr/local/bin/VPinballX_BGFX");
        let resolved = resolve_vpx_exe(path);
        assert_eq!(resolved, path.to_path_buf());
    }

    #[test]
    fn resolve_vpx_exe_nonexistent_path() {
        let path = Path::new("/nonexistent/path/VPinballX_BGFX");
        let resolved = resolve_vpx_exe(path);
        assert_eq!(resolved, path.to_path_buf());
    }

    #[test]
    fn extract_tar_gz_roundtrip() {
        let dir = tempfile::tempdir().unwrap();
        let archive_path = dir.path().join("test.tar.gz");
        let dest = dir.path().join("extracted");

        // Create a tar.gz with a test file
        {
            let file = std::fs::File::create(&archive_path).unwrap();
            let gz = flate2::write::GzEncoder::new(file, flate2::Compression::default());
            let mut tar = tar::Builder::new(gz);

            let content = b"hello pinball";
            let mut header = tar::Header::new_gnu();
            header.set_size(content.len() as u64);
            header.set_mode(0o644);
            header.set_cksum();
            tar.append_data(&mut header, "test.txt", &content[..])
                .unwrap();
            tar.finish().unwrap();
        }

        extract_tar_gz(&archive_path, &dest).unwrap();
        let extracted = std::fs::read_to_string(dest.join("test.txt")).unwrap();
        assert_eq!(extracted, "hello pinball");
    }

    #[test]
    fn extract_zip_roundtrip() {
        let dir = tempfile::tempdir().unwrap();
        let archive_path = dir.path().join("test.zip");
        let dest = dir.path().join("extracted");

        // Create a zip with a test file
        {
            let file = std::fs::File::create(&archive_path).unwrap();
            let mut zip = zip::ZipWriter::new(file);
            let options = zip::write::SimpleFileOptions::default();
            zip.start_file("test.txt", options).unwrap();
            zip.write_all(b"hello vpx").unwrap();
            zip.finish().unwrap();
        }

        extract_zip(&archive_path, &dest).unwrap();
        let extracted = std::fs::read_to_string(dest.join("test.txt")).unwrap();
        assert_eq!(extracted, "hello vpx");
    }
}