retch_cli/

logo.rs

// SPDX-FileCopyrightText: 2026 Ken Tobias
// SPDX-License-Identifier: GPL-3.0-or-later

//! ASCII and graphical logo definitions and rendering.
//!
//! Contains embedded distro logos and logic for rendering them
//! as text or images (e.g., Sixel, Kitty, iTerm).

// Exact Fastfetch ASCII logos (intact, unmodified)
// Source: https://github.com/fastfetch-cli/fastfetch/src/logo/ascii/

// Embedded distro logos (PNG)
// Place real logos in assets/logos/<distro>.png
// Example: assets/logos/arch.png, assets/logos/fedora.png, assets/logos/tux.png

/// Returns the raw PNG bytes for an embedded distro logo.
///
/// If the distro is not recognized, it falls back to the Tux (Linux) logo.
/// Only available when the `graphics` feature is enabled.
#[cfg(feature = "graphics")]
pub fn get_embedded_logo(distro: Option<&str>) -> Option<&'static [u8]> {
    let d = distro.map(|s| s.to_lowercase());
    match d.as_deref() {
        Some("arch") => Some(include_bytes!("../assets/logos/arch.png")),
        Some("debian") => Some(include_bytes!("../assets/logos/debian.png")),
        Some("fedora") => Some(include_bytes!("../assets/logos/fedora.png")),
        Some("nixos") => Some(include_bytes!("../assets/logos/nixos.png")),
        Some("ubuntu") => Some(include_bytes!("../assets/logos/ubuntu.png")),
        Some("pop") => Some(include_bytes!("../assets/logos/pop.png")),
        Some("manjaro") => Some(include_bytes!("../assets/logos/manjaro.png")),
        Some("endeavouros") => Some(include_bytes!("../assets/logos/endeavouros.png")),
        Some("opensuse") | Some("opensuse-leap") | Some("opensuse-tumbleweed") => {
            Some(include_bytes!("../assets/logos/opensuse.png"))
        }
        Some("mx") => Some(include_bytes!("../assets/logos/mx.png")),
        Some("linuxmint") => Some(include_bytes!("../assets/logos/linuxmint.png")),
        Some("kali") => Some(include_bytes!("../assets/logos/kali.png")),
        Some("zorin") => Some(include_bytes!("../assets/logos/zorin.png")),
        Some("garuda") => Some(include_bytes!("../assets/logos/garuda.png")),
        Some("macos") => Some(include_bytes!("../assets/logos/macos.png")),
        Some("windows") => Some(include_bytes!("../assets/logos/windows.png")),
        _ => Some(include_bytes!("../assets/logos/tux.png")),
    }
}

/// Fallback for non-graphics build to provide Tux bytes for Chafa if needed.
#[cfg(not(feature = "graphics"))]
pub fn get_embedded_logo(_distro: Option<&str>) -> Option<&'static [u8]> {
    Some(include_bytes!("../assets/logos/tux.png"))
}

/// Attempts to detect the current operating system distribution.
pub fn detect_distro() -> Option<String> {
    #[cfg(target_os = "macos")]
    {
        Some("macos".to_string())
    }
    #[cfg(target_os = "windows")]
    {
        Some("windows".to_string())
    }
    #[cfg(not(any(target_os = "macos", target_os = "windows")))]
    {
        if let Ok(content) = std::fs::read_to_string("/etc/os-release") {
            for line in content.lines() {
                if line.starts_with("ID=") {
                    let id = line.trim_start_matches("ID=").trim_matches('"');
                    return Some(id.to_string());
                }
            }
        }
        None
    }
}

///// Returns a list of strings representing the ASCII art for a given distro with color placeholders.
///
/// All ASCII logos are sourced from or compatible with Fastfetch.
pub fn get_ascii_logo(distro: Option<&str>) -> Vec<String> {
    let d = distro.map(|s| s.to_lowercase());

    match d.as_deref() {
        Some("arch") => {
            let logo = include_str!("../assets/logos/arch.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("debian") => {
            let logo = include_str!("../assets/logos/debian.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("fedora") => {
            let logo = include_str!("../assets/logos/fedora.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("nixos") => {
            let logo = include_str!("../assets/logos/nixos.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("ubuntu") => {
            let logo = include_str!("../assets/logos/ubuntu.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("pop") => {
            let logo = include_str!("../assets/logos/pop.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("manjaro") => {
            let logo = include_str!("../assets/logos/manjaro.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("endeavouros") => {
            let logo = include_str!("../assets/logos/endeavouros.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("opensuse") | Some("opensuse-leap") | Some("opensuse-tumbleweed") => {
            let logo = include_str!("../assets/logos/opensuse.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("mx") => {
            let logo = include_str!("../assets/logos/mx.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("linuxmint") => {
            let logo = include_str!("../assets/logos/linuxmint.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("kali") => {
            let logo = include_str!("../assets/logos/kali.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("zorin") => {
            let logo = include_str!("../assets/logos/zorin.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("garuda") => {
            let logo = include_str!("../assets/logos/garuda.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("macos") => {
            let logo = include_str!("../assets/logos/macos.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
        Some("windows") => {
            let logo = include_str!("../assets/logos/windows.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }

        // Fallback: Tux (Linux)
        _ => {
            let logo = include_str!("../assets/logos/tux.txt");
            logo.lines().map(|s| s.to_string()).collect()
        }
    }
}

/// Returns dynamic ANSI color arrays for a given distribution.
pub fn get_distro_colors(distro: Option<&str>) -> Vec<&'static str> {
    let d = distro.map(|s| s.to_lowercase());
    match d.as_deref() {
        Some("arch") => vec!["\x1b[36m", "\x1b[37m"],
        Some("debian") => vec!["\x1b[31m", "\x1b[37m"],
        Some("fedora") => vec!["\x1b[34m", "\x1b[37m"],
        Some("nixos") => vec![
            "\x1b[34m", "\x1b[36m", "\x1b[34m", "\x1b[36m", "\x1b[34m", "\x1b[36m",
        ],
        Some("ubuntu") => vec!["\x1b[33m", "\x1b[31m"],
        Some("pop") => vec!["\x1b[36m", "\x1b[37m"],
        Some("manjaro") => vec!["\x1b[32m"],
        Some("endeavouros") => vec!["\x1b[35m", "\x1b[31m", "\x1b[34m"],
        Some("opensuse") | Some("opensuse-leap") | Some("opensuse-tumbleweed") => {
            vec!["\x1b[32m", "\x1b[37m"]
        }
        Some("mx") => vec!["\x1b[34m", "\x1b[37m"],
        Some("linuxmint") => vec!["\x1b[32m", "\x1b[37m"],
        Some("kali") => vec!["\x1b[34m", "\x1b[37m"],
        Some("zorin") => vec!["\x1b[36m", "\x1b[37m"],
        Some("garuda") => vec!["\x1b[35m", "\x1b[36m"],
        // Grayscale (silver) ramp, matching the modern monochrome Apple logo rather than the
        // legacy rainbow. 256-colour greys (light→medium) read on light and dark terminals.
        Some("macos") => vec![
            "\x1b[38;5;252m",
            "\x1b[38;5;250m",
            "\x1b[38;5;248m",
            "\x1b[38;5;246m",
            "\x1b[38;5;244m",
        ],
        Some("windows") => vec!["\x1b[36m"],
        _ => vec!["\x1b[30m", "\x1b[37m", "\x1b[33m"], // Tux
    }
}

/// Interpolates placeholders `${1}`...`${9}` or `$1`...`$9` with dynamic ANSI colors and appends a reset at the end.
pub fn get_distro_logo_lines(distro: Option<&str>) -> Vec<String> {
    let raw_lines = get_ascii_logo(distro);
    let colors = get_distro_colors(distro);
    let default_color = colors.first().copied().unwrap_or("\x1b[0m");

    raw_lines
        .into_iter()
        .map(|line| {
            let mut formatted = line;
            for i in 1..=9 {
                let color_val = colors.get(i - 1).copied().unwrap_or("\x1b[0m");
                let placeholder = format!("${{{}}}", i);
                formatted = formatted.replace(&placeholder, color_val);
                let placeholder_short = format!("${}", i);
                formatted = formatted.replace(&placeholder_short, color_val);
            }
            if !formatted.is_empty() {
                format!("{}{}\x1b[0m", default_color, formatted)
            } else {
                formatted
            }
        })
        .collect()
}

/// Checks if the terminal supports the Kitty inline image protocol.
pub fn supports_kitty() -> bool {
    std::env::var("TERM")
        .map(|t| t == "xterm-kitty")
        .unwrap_or(false)
        || std::env::var("TERMINAL_EMULATOR")
            .map(|t| t == "iterm-kitty" || t == "iTerm.app")
            .unwrap_or(false)
        || std::env::var("TERM_PROGRAM")
            .map(|t| t == "rio")
            .unwrap_or(false)
}

/// Checks if the terminal supports the iTerm2 inline image protocol.
pub fn supports_iterm2() -> bool {
    if let Ok(prog) = std::env::var("TERM_PROGRAM") {
        if prog == "iTerm.app" || prog == "WezTerm" || prog == "rio" {
            return true;
        }
    }
    false
}

/// Checks if the terminal supports Sixel graphics (heuristic based on environment).
pub fn supports_sixel() -> bool {
    if let Ok(term) = std::env::var("TERM") {
        let term = term.to_lowercase();
        if term.contains("sixel") || term.contains("foot") || term.contains("mlterm") {
            return true;
        }
    }

    if let Ok(prog) = std::env::var("TERM_PROGRAM") {
        if prog == "WezTerm" || prog == "iTerm.app" || prog == "rio" {
            return true;
        }
    }

    if std::env::var("WT_SESSION").is_ok() {
        return true;
    }

    false
}

static CHAFA_SUPPORTS_PROBE: std::sync::OnceLock<bool> = std::sync::OnceLock::new();

/// Checks if the `chafa` command-line tool supports the `--probe` option.
pub fn chafa_supports_probe() -> bool {
    *CHAFA_SUPPORTS_PROBE.get_or_init(|| {
        std::process::Command::new("chafa")
            .args(["--probe", "off", "--version"])
            .output()
            .map(|o| o.status.success())
            .unwrap_or(false)
    })
}

/// Checks if the `chafa` command-line tool is available in the system path.
pub fn chafa_available() -> bool {
    std::process::Command::new("chafa")
        .arg("--version")
        .output()
        .map(|o| o.status.success())
        .unwrap_or(false)
}

/// Write embedded logo bytes to a temporary file and return the path.
fn write_temp_logo(bytes: &[u8]) -> std::io::Result<std::path::PathBuf> {
    let temp_path = std::env::temp_dir().join(format!("retch_logo_{}.png", std::process::id()));
    std::fs::write(&temp_path, bytes)?;
    Ok(temp_path)
}

/// Attempts to render an image using the `chafa` utility.
///
/// Chafa renders images using high-quality Unicode symbols, providing a
/// good graphical fallback for many terminal emulators.
pub fn print_with_chafa(path: &std::path::Path) -> bool {
    let mut cmd = std::process::Command::new("chafa");
    cmd.arg("--format")
        .arg("symbols")
        .arg("--size")
        .arg("28x10");

    if chafa_supports_probe() {
        cmd.arg("--probe").arg("off");
    }

    let output = cmd.arg(path).output();

    match output {
        Ok(out) if out.status.success() => {
            print!("{}", String::from_utf8_lossy(&out.stdout));
            true
        }
        Ok(out) => {
            eprintln!("warning: chafa failed with status: {}", out.status);
            false
        }
        Err(e) => {
            eprintln!("warning: failed to execute chafa: {}", e);
            false
        }
    }
}

/// Attempts to get Chafa output as a list of lines.
pub fn get_chafa_logo_lines(path: &std::path::Path) -> Option<Vec<String>> {
    let mut cmd = std::process::Command::new("chafa");
    cmd.arg("--format")
        .arg("symbols")
        .arg("--size")
        .arg("28x10");

    if chafa_supports_probe() {
        cmd.arg("--probe").arg("off");
    }

    let output = cmd.arg(path).output().ok()?;
    if output.status.success() {
        let content = String::from_utf8_lossy(&output.stdout);
        Some(content.lines().map(|s| s.to_string()).collect())
    } else {
        None
    }
}

/// Print logo for a distro following the strict priority:
/// 1. Real graphic logo (if terminal supports it and embedded logo exists)
/// 2. Chafa high-quality symbols (if chafa is available)
/// 3. Real Fastfetch ASCII logo (always available)
pub fn print_distro_logo(distro: Option<&str>) {
    print_distro_logo_with_ascii(distro, false, false);
}

/// Renders the distribution logo with options to force ASCII or Chafa mode.
///
/// This is the primary entry point for logo rendering, handling the entire
/// priority chain from high-res graphics down to text-based ASCII.
/// - `ascii_only`: skip all graphical protocols and render the ASCII art directly.
/// - `chafa_only`: skip Kitty/iTerm2/Sixel and go straight to Chafa (falls back
///   to ASCII if Chafa is unavailable). `ascii_only` takes precedence.
pub fn print_distro_logo_with_ascii(distro: Option<&str>, ascii_only: bool, chafa_only: bool) {
    if ascii_only {
        // Force ASCII path
        let art = get_distro_logo_lines(distro);
        for line in art {
            println!("{}", line);
        }
        return;
    }

    let has_chafa = chafa_available();

    if !chafa_only {
        let supports_kitty = supports_kitty();
        let supports_iterm2 = supports_iterm2();
        let supports_sixel = supports_sixel();

        // 1. Try embedded graphical logo (Kitty)
        #[cfg(feature = "graphics")]
        if supports_kitty {
            if let Some(bytes) = get_embedded_logo(distro) {
                if !bytes.is_empty() {
                    print_graphical_logo(bytes);
                    return;
                }
            }
        }

        // 2. Try embedded graphical logo (iTerm2)
        #[cfg(feature = "graphics")]
        if supports_iterm2 {
            if let Some(bytes) = get_embedded_logo(distro) {
                if !bytes.is_empty() {
                    print_iterm2_logo(bytes);
                    return;
                }
            }
        }

        // 3. Try embedded graphical logo (Sixel)
        #[cfg(feature = "graphics")]
        if supports_sixel {
            if let Some(bytes) = get_embedded_logo(distro) {
                if !bytes.is_empty() {
                    print_sixel_logo(bytes);
                    return;
                }
            }
        }
    }

    // 4. Try chafa using embedded distro logo
    if has_chafa {
        if let Some(bytes) = get_embedded_logo(distro) {
            if bytes.len() > 100 {
                if let Ok(temp_path) = write_temp_logo(bytes) {
                    if print_with_chafa(&temp_path) {
                        let _ = std::fs::remove_file(&temp_path);
                        return;
                    }
                    let _ = std::fs::remove_file(&temp_path);
                }
            }
        }
    }

    // 5. Final fallback: Real Fastfetch ASCII logo
    let art = get_distro_logo_lines(distro);
    for line in art {
        println!("{}", line);
    }
}

/// Renders a raw image buffer using the iTerm2 inline image protocol.
#[cfg(feature = "graphics")]
pub fn print_iterm2_logo(image_data: &[u8]) {
    use base64::Engine;
    let encoded = base64::engine::general_purpose::STANDARD.encode(image_data);
    print!(
        "\x1b]1337;File=inline=1;height=10;preserveAspectRatio=1:{}\x07",
        encoded
    );
    println!(); // iTerm2 typically needs a newline after the logo
}

/// Loads an image from a file and prints it using the iTerm2 protocol.
#[cfg(feature = "graphics")]
pub fn print_iterm2_logo_from_path(path: &std::path::Path) {
    if let Ok(bytes) = std::fs::read(path) {
        print_iterm2_logo(&bytes);
    } else {
        println!("[Could not read logo for iTerm2 from {}]", path.display());
    }
}

/// Placeholder for iTerm2 logo rendering when the `graphics` feature is disabled.
#[cfg(not(feature = "graphics"))]
pub fn print_iterm2_logo(_image_data: &[u8]) {
    println!("[iTerm2 logo support requires --features graphics]");
}

/// Renders a raw image buffer using the Kitty graphics protocol.
#[cfg(feature = "graphics")]
pub fn print_graphical_logo(image_data: &[u8]) {
    use base64::Engine;

    let (width, height) = image::load_from_memory(image_data)
        .map(|img| (img.width(), img.height()))
        .unwrap_or((0, 0));

    let encoded = base64::engine::general_purpose::STANDARD.encode(image_data);

    if width > 0 && height > 0 {
        println!(
            "\x1b_Gf=100,s={},v={},c=26,r=10,a=T;{}\x1b\\",
            width, height, encoded
        );
    } else {
        println!("\x1b_Gf=100,a=T;{}", encoded);
    }
}

/// Renders a raw image buffer (e.g. PNG bytes) using the Sixel graphics protocol.
#[cfg(feature = "graphics")]
pub fn print_sixel_logo(image_data: &[u8]) {
    if let Ok(img) = image::load_from_memory(image_data) {
        let resized = img.resize(240, 200, image::imageops::FilterType::Triangle);
        let rgba = resized.to_rgba8();
        let (width, height) = rgba.dimensions();
        print_sixel_rgba(rgba.as_raw(), width, height);
    }
}

/// Renders raw RGBA pixels using the Sixel graphics protocol.
#[cfg(feature = "graphics")]
pub fn print_sixel_rgba(rgba: &[u8], width: u32, height: u32) {
    use icy_sixel::SixelImage;

    match SixelImage::try_from_rgba(rgba.to_vec(), width as usize, height as usize) {
        Ok(sixel_img) => match sixel_img.encode() {
            Ok(sixel_str) => {
                print!("{}", sixel_str);
            }
            Err(e) => eprintln!("[Sixel Encoding Error: {}]", e),
        },
        Err(e) => eprintln!("[Sixel Creation Error: {}]", e),
    }
}

/// Placeholder for graphical logo rendering when the `graphics` feature is disabled.
#[cfg(not(feature = "graphics"))]
pub fn print_graphical_logo(_image_data: &[u8]) {
    println!("[Graphical logo support requires --features graphics]");
}

/// Placeholder for sixel logo rendering when the `graphics` feature is disabled.
#[cfg(not(feature = "graphics"))]
pub fn print_sixel_logo(_image_data: &[u8]) {
    println!("[Sixel logo support requires --features graphics]");
}

/// Loads an image from a file, resizes it, and prints it using the graphics protocol.
#[cfg(feature = "graphics")]
pub fn print_graphical_logo_from_path(path: &std::path::Path) {
    use image::ImageFormat;
    match image::open(path) {
        Ok(img) => {
            let resized = img.resize(128, 128, image::imageops::FilterType::Lanczos3);
            let mut png_data = Vec::new();
            if resized
                .write_to(&mut std::io::Cursor::new(&mut png_data), ImageFormat::Png)
                .is_ok()
            {
                print_graphical_logo(&png_data);
            } else {
                println!("[Failed to encode logo as PNG]");
            }
        }
        Err(_) => {
            println!("[Could not load graphical logo from {}]", path.display());
        }
    }
}

/// Loads an image from a file, resizes it, and prints it using the Sixel protocol.
#[cfg(feature = "graphics")]
pub fn print_sixel_logo_from_path(path: &std::path::Path) {
    match image::open(path) {
        Ok(img) => {
            let resized = img.resize(128, 128, image::imageops::FilterType::Lanczos3);
            let rgba = resized.to_rgba8();
            let (width, height) = rgba.dimensions();
            print_sixel_rgba(rgba.as_raw(), width, height);
        }
        Err(_) => {
            println!("[Could not load logo for Sixel from {}]", path.display());
        }
    }
}

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

    #[test]
    fn test_get_ascii_logo_arch() {
        let logo = get_ascii_logo(Some("arch"));
        assert!(!logo.is_empty());
        assert!(logo[0].contains("`"));
    }

    #[test]
    fn test_get_ascii_logo_unknown() {
        let logo = get_ascii_logo(Some("unknown_distro"));
        assert!(!logo.is_empty());
        // Should fall back to Tux
        assert!(logo
            .iter()
            .any(|line| line.contains("o${2}_${3}o") || line.contains("o_o")));
    }

    #[test]
    fn test_get_ascii_logo_none() {
        let logo = get_ascii_logo(None);
        assert!(!logo.is_empty());
    }

    static ENV_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());

    struct EnvGuard {
        _mutex_guard: std::sync::MutexGuard<'static, ()>,
        old_vars: std::collections::HashMap<&'static str, Option<String>>,
    }

    impl EnvGuard {
        fn new(vars_to_mock: &[&'static str]) -> Self {
            let guard = ENV_LOCK.lock().unwrap();
            let mut old_vars = std::collections::HashMap::new();
            for var in vars_to_mock {
                old_vars.insert(*var, std::env::var(var).ok());
            }
            EnvGuard {
                _mutex_guard: guard,
                old_vars,
            }
        }
    }

    impl Drop for EnvGuard {
        fn drop(&mut self) {
            for (var, value) in &self.old_vars {
                if let Some(val) = value {
                    std::env::set_var(var, val);
                } else {
                    std::env::remove_var(var);
                }
            }
        }
    }

    #[test]
    fn test_supports_kitty_heuristics() {
        let _guard = EnvGuard::new(&["TERM", "TERMINAL_EMULATOR", "TERM_PROGRAM"]);

        // Test TERM=xterm-kitty
        std::env::set_var("TERM", "xterm-kitty");
        std::env::remove_var("TERMINAL_EMULATOR");
        std::env::remove_var("TERM_PROGRAM");
        assert!(supports_kitty());

        // Test TERMINAL_EMULATOR=iterm-kitty
        std::env::remove_var("TERM");
        std::env::set_var("TERMINAL_EMULATOR", "iterm-kitty");
        assert!(supports_kitty());

        // Test TERMINAL_EMULATOR=iTerm.app
        std::env::set_var("TERMINAL_EMULATOR", "iTerm.app");
        assert!(supports_kitty());

        // Test TERM_PROGRAM=rio
        std::env::remove_var("TERMINAL_EMULATOR");
        std::env::set_var("TERM_PROGRAM", "rio");
        assert!(supports_kitty());

        // Test clear env -> false
        std::env::remove_var("TERM_PROGRAM");
        assert!(!supports_kitty());
    }

    #[test]
    fn test_supports_iterm2_heuristics() {
        let _guard = EnvGuard::new(&["TERM_PROGRAM"]);

        // Test TERM_PROGRAM=iTerm.app
        std::env::set_var("TERM_PROGRAM", "iTerm.app");
        assert!(supports_iterm2());

        // Test TERM_PROGRAM=WezTerm
        std::env::set_var("TERM_PROGRAM", "WezTerm");
        assert!(supports_iterm2());

        // Test TERM_PROGRAM=rio
        std::env::set_var("TERM_PROGRAM", "rio");
        assert!(supports_iterm2());

        // Test TERM_PROGRAM=Apple_Terminal
        std::env::set_var("TERM_PROGRAM", "Apple_Terminal");
        assert!(!supports_iterm2());

        // Test clear env -> false
        std::env::remove_var("TERM_PROGRAM");
        assert!(!supports_iterm2());
    }

    #[test]
    fn test_supports_sixel_heuristics() {
        let _guard = EnvGuard::new(&["TERM", "TERM_PROGRAM", "WT_SESSION"]);

        // Clear all to start fresh
        std::env::remove_var("TERM");
        std::env::remove_var("TERM_PROGRAM");
        std::env::remove_var("WT_SESSION");
        assert!(!supports_sixel());

        // Test TERM=xterm-sixel
        std::env::set_var("TERM", "xterm-sixel");
        assert!(supports_sixel());

        // Test TERM=foot
        std::env::set_var("TERM", "foot");
        assert!(supports_sixel());

        // Test TERM=mlterm (case variations)
        std::env::set_var("TERM", "MLTerm");
        assert!(supports_sixel());

        // Reset TERM, test TERM_PROGRAM=WezTerm
        std::env::remove_var("TERM");
        std::env::set_var("TERM_PROGRAM", "WezTerm");
        assert!(supports_sixel());

        // Test TERM_PROGRAM=iTerm.app
        std::env::set_var("TERM_PROGRAM", "iTerm.app");
        assert!(supports_sixel());

        // Test TERM_PROGRAM=rio
        std::env::set_var("TERM_PROGRAM", "rio");
        assert!(supports_sixel());

        // Reset TERM_PROGRAM, test WT_SESSION
        std::env::remove_var("TERM_PROGRAM");
        std::env::set_var("WT_SESSION", "active");
        assert!(supports_sixel());
    }

    #[test]
    fn test_get_embedded_logo() {
        let logo = get_embedded_logo(Some("arch"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("pop"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("manjaro"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("endeavouros"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("opensuse"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("opensuse-leap"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("opensuse-tumbleweed"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("mx"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("linuxmint"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("kali"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("zorin"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("garuda"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("macos"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(Some("windows"));
        assert!(logo.is_some());
        let logo = get_embedded_logo(None);
        assert!(logo.is_some());
    }

    #[test]
    fn test_get_ascii_logo_new_distros() {
        let pop = get_ascii_logo(Some("pop"));
        assert!(!pop.is_empty());
        assert!(pop.iter().any(|line| line.contains("767")));

        let manjaro = get_ascii_logo(Some("manjaro"));
        assert!(!manjaro.is_empty());
        assert!(manjaro.iter().any(|line| line.contains("████████")));

        let endeavouros = get_ascii_logo(Some("endeavouros"));
        assert!(!endeavouros.is_empty());
        assert!(endeavouros.iter().any(|line| line.contains("ssso")));

        let opensuse = get_ascii_logo(Some("opensuse"));
        assert!(!opensuse.is_empty());
        assert!(opensuse.iter().any(|line| line.contains("O0000Ok")));

        let macos = get_ascii_logo(Some("macos"));
        assert!(!macos.is_empty());
        assert!(macos
            .iter()
            .any(|line| line.contains("cKMMMMMMMMMMNWMMMMMMMMMM0")));

        let windows = get_ascii_logo(Some("windows"));
        assert!(!windows.is_empty());
        assert!(windows
            .iter()
            .any(|line| line.contains("AEEEtttt::::ztF") || line.contains("tt:::tt333EE3")));

        let mx = get_ascii_logo(Some("mx"));
        assert!(!mx.is_empty());
        assert!(mx
            .iter()
            .any(|line| line.contains("MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNMMMMMMMMM")));

        let linuxmint = get_ascii_logo(Some("linuxmint"));
        assert!(!linuxmint.is_empty());
        assert!(linuxmint.iter().any(|line| line.contains("oOOOOOOOOOOo")));

        let kali = get_ascii_logo(Some("kali"));
        assert!(!kali.is_empty());
        assert!(kali.iter().any(|line| line.contains(":ccc")));

        let zorin = get_ascii_logo(Some("zorin"));
        assert!(!zorin.is_empty());
        assert!(zorin
            .iter()
            .any(|line| line.contains("osssssssssssssssssssso")));

        let garuda = get_ascii_logo(Some("garuda"));
        assert!(!garuda.is_empty());
        assert!(garuda.iter().any(|line| line.contains("888:8898898")));
    }
}