wasma-sys 1.3.0-beta-stable2

// WASMA - Windows Assignment System Monitoring Architecture
// wasma_protocol_unix_posix_window.rs
// Normal (non-raw) POSIX Window Launch Protocol
// Manages window creation, lifecycle, and rendering via direct client specification.
// Launch triggers: client spec (manifest/config) or runtime API call — both supported.
// Window mode: Singularity (single) or Multitary (multi), runtime selection.
// Integrations: PosixOpt (auto), WindowClient (optional), RawWindowClient (optional delegate)
// Implements UClientEngine.
// January 2026

use std::collections::HashMap;
use std::sync::{Arc, Mutex, RwLock};
use std::time::SystemTime;

use crate::parser::WasmaConfig;
use crate::uclient::SectionMemory;
use crate::wasma_client_unix_posix_raw_app::UClientEngine;
use crate::wasma_client_unix_posix_raw_window::RawWindowClient;
use crate::wasma_protocol_unix_posix_opt::{
    DisplayBackend, PosixOpt, RuntimeOptStore, ToolkitTheme,
};
use crate::window_client::WindowClient;
use crate::window_handling::{WindowGeometry, WindowState, WindowType};

// ============================================================================
// WINDOW MODE — Singularity or Multitary
// ============================================================================

/// Window mode — controls how many windows can be active simultaneously
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum WindowMode {
    /// Singularity: only one window active at a time
    /// New launch replaces the existing window
    Singularity,
    /// Multitary: multiple windows can coexist
    /// Each launch creates a new independent window
    Multitary,
}

impl WindowMode {
    pub fn name(&self) -> &'static str {
        match self {
            Self::Singularity => "singularity",
            Self::Multitary => "multitary",
        }
    }

    pub fn from_config(config: &WasmaConfig) -> Self {
        if config.uri_handling.singularity_instances {
            Self::Singularity
        } else {
            Self::Multitary
        }
    }
}

// ============================================================================
// WINDOW SPEC — Client specification for window launch
// ============================================================================

/// Window spec source — where did this spec come from?
#[derive(Debug, Clone, PartialEq)]
pub enum SpecSource {
    /// Parsed from manifest/config file
    Manifest(String),
    /// Provided at runtime via API
    Runtime,
    /// Derived from WasmaConfig
    Config,
}

impl SpecSource {
    pub fn label(&self) -> String {
        match self {
            Self::Manifest(path) => format!("manifest:{}", path),
            Self::Runtime => "runtime".to_string(),
            Self::Config => "config".to_string(),
        }
    }
}

/// Decoration style for the window
#[derive(Debug, Clone, PartialEq)]
pub enum DecorationStyle {
    /// Full server-side decorations (title bar, borders)
    ServerSide,
    /// Client-side decorations (app draws its own title bar)
    ClientSide,
    /// No decorations (borderless)
    None,
    /// Auto: let the compositor decide
    Auto,
}

/// Window launch specification — complete description of a window to be created
#[derive(Debug, Clone)]
pub struct WindowSpec {
    /// Application identifier
    pub app_id: String,
    /// Window title
    pub title: String,
    /// Window type (Normal, Dialog, Utility, etc.)
    pub window_type: WindowType,
    /// Initial geometry in logical pixels
    pub geometry: WindowGeometry,
    /// Decoration style
    pub decoration: DecorationStyle,
    /// Initial window state
    pub initial_state: WindowState,
    /// Start visible
    pub start_visible: bool,
    /// Start focused
    pub start_focused: bool,
    /// Parent window ID (for dialogs/popups)
    pub parent_id: Option<u64>,
    /// Custom key-value properties (from manifest)
    pub properties: HashMap<String, String>,
    /// Spec source
    pub source: SpecSource,
    /// Spec creation time
    pub created_at: SystemTime,
}

impl WindowSpec {
    /// Create a minimal spec with defaults
    pub fn new(app_id: impl Into<String>, title: impl Into<String>) -> Self {
        Self {
            app_id: app_id.into(),
            title: title.into(),
            window_type: WindowType::Normal,
            geometry: WindowGeometry {
                x: 0,
                y: 0,
                width: 800,
                height: 600,
            },
            decoration: DecorationStyle::Auto,
            initial_state: WindowState::Normal,
            start_visible: true,
            start_focused: true,
            parent_id: None,
            properties: HashMap::new(),
            source: SpecSource::Runtime,
            created_at: SystemTime::now(),
        }
    }

    pub fn from_config(config: &WasmaConfig) -> Self {
        let mut spec = Self::new(
            config.uri_handling.window_app_spec.clone(),
            "Wasma App".to_string(),
        );
        spec.source = SpecSource::Config;
        spec.geometry = WindowGeometry {
            x: 0,
            y: 0,
            width: config.resource_limits.scope_level.max(1) as u32 * 100 + 800,
            height: 600,
        };
        spec
    }

    /// Parse spec from a simple manifest key=value format
    pub fn from_manifest(content: &str, path: impl Into<String>) -> Self {
        let path = path.into();
        let mut spec = Self::new("unknown.app", "Untitled");
        spec.source = SpecSource::Manifest(path);

        for line in content.lines() {
            let line = line.trim();
            if line.starts_with('#') || line.is_empty() {
                continue;
            }
            if let Some((key, val)) = line.split_once('=') {
                let key = key.trim();
                let val = val.trim();
                match key {
                    "app_id" => spec.app_id = val.to_string(),
                    "title" => spec.title = val.to_string(),
                    "width" => spec.geometry.width = val.parse().unwrap_or(800),
                    "height" => spec.geometry.height = val.parse().unwrap_or(600),
                    "x" => spec.geometry.x = val.parse().unwrap_or(0),
                    "y" => spec.geometry.y = val.parse().unwrap_or(0),
                    "visible" => spec.start_visible = val == "true",
                    "focused" => spec.start_focused = val == "true",
                    "decoration" => {
                        spec.decoration = match val {
                            "server" => DecorationStyle::ServerSide,
                            "client" => DecorationStyle::ClientSide,
                            "none" => DecorationStyle::None,
                            _ => DecorationStyle::Auto,
                        }
                    }
                    "type" => {
                        spec.window_type = match val {
                            "dialog" => WindowType::Dialog,
                            "utility" => WindowType::Utility,
                            _ => WindowType::Normal,
                        }
                    }
                    "state" => {
                        spec.initial_state = match val {
                            "minimized" => WindowState::Minimized,
                            "maximized" => WindowState::Maximized,
                            "fullscreen" => WindowState::Fullscreen,
                            "hidden" => WindowState::Hidden,
                            _ => WindowState::Normal,
                        }
                    }
                    _ => {
                        spec.properties.insert(key.to_string(), val.to_string());
                    }
                }
            }
        }
        spec
    }

    /// Validate spec fields
    pub fn validate(&self) -> Result<(), Vec<String>> {
        let mut errors = Vec::new();
        if self.app_id.is_empty() {
            errors.push("app_id cannot be empty".to_string());
        }
        if self.title.is_empty() {
            errors.push("title cannot be empty".to_string());
        }
        if self.geometry.width == 0 || self.geometry.height == 0 {
            errors.push(format!(
                "Invalid geometry: {}x{} (must be > 0)",
                self.geometry.width, self.geometry.height
            ));
        }
        if errors.is_empty() {
            Ok(())
        } else {
            Err(errors)
        }
    }
}

/// WindowSpec builder — chainable
pub struct WindowSpecBuilder {
    spec: WindowSpec,
}

impl WindowSpecBuilder {
    pub fn new(app_id: impl Into<String>, title: impl Into<String>) -> Self {
        Self {
            spec: WindowSpec::new(app_id, title),
        }
    }

    pub fn geometry(mut self, x: i32, y: i32, w: u32, h: u32) -> Self {
        self.spec.geometry = WindowGeometry {
            x,
            y,
            width: w,
            height: h,
        };
        self
    }

    pub fn window_type(mut self, t: WindowType) -> Self {
        self.spec.window_type = t;
        self
    }

    pub fn decoration(mut self, d: DecorationStyle) -> Self {
        self.spec.decoration = d;
        self
    }

    pub fn initial_state(mut self, s: WindowState) -> Self {
        self.spec.initial_state = s;
        self
    }

    pub fn start_visible(mut self, v: bool) -> Self {
        self.spec.start_visible = v;
        self
    }

    pub fn start_focused(mut self, f: bool) -> Self {
        self.spec.start_focused = f;
        self
    }

    pub fn parent(mut self, id: u64) -> Self {
        self.spec.parent_id = Some(id);
        self
    }

    pub fn property(mut self, key: impl Into<String>, val: impl Into<String>) -> Self {
        self.spec.properties.insert(key.into(), val.into());
        self
    }

    pub fn source(mut self, s: SpecSource) -> Self {
        self.spec.source = s;
        self
    }

    pub fn build(self) -> Result<WindowSpec, Vec<String>> {
        self.spec.validate()?;
        Ok(self.spec)
    }

    pub fn build_unchecked(self) -> WindowSpec {
        self.spec
    }
}

// ============================================================================
// POSIX WINDOW — Active window handle
// ============================================================================

/// A launched and active POSIX window
#[derive(Debug, Clone)]
pub struct PosixWindow {
    /// Unique window ID
    pub id: u64,
    /// The spec used to create this window
    pub spec: WindowSpec,
    /// Current geometry (may differ from spec after user resizing)
    pub geometry: WindowGeometry,
    /// Current state
    pub state: WindowState,
    /// Current visibility
    pub visible: bool,
    /// Current focus
    pub focused: bool,
    /// Which opt group was applied at launch time
    pub applied_opt_source: String,
    /// Launch timestamp
    pub launched_at: SystemTime,
    /// Backend used for this window
    pub backend: DisplayBackend,
}

impl PosixWindow {
    fn from_spec(id: u64, spec: WindowSpec, opt: &PosixOpt) -> Self {
        let backend = opt.backend.effective_backend();
        let geometry = WindowGeometry {
            x: spec.geometry.x,
            y: spec.geometry.y,
            // Apply PosixOpt min size constraints
            width: spec.geometry.width.max(opt.draw.size.min_width),
            height: spec.geometry.height.max(opt.draw.size.min_height),
        };
        let state = spec.initial_state.clone();
        let visible = spec.start_visible;
        let focused = spec.start_focused;

        Self {
            id,
            geometry,
            state,
            visible,
            focused,
            applied_opt_source: opt.source.clone(),
            launched_at: SystemTime::now(),
            backend,
            spec,
        }
    }

    pub fn is_alive(&self) -> bool {
        self.visible || matches!(self.state, WindowState::Minimized)
    }
}

// ============================================================================
// POSIX WINDOW LAUNCHER — Core launch manager
// ============================================================================

/// PosixWindowLauncher
///
/// Manages normal (non-raw) POSIX window creation and lifecycle.
/// Supports both manifest/config-based and runtime API launch.
/// Mode: Singularity (one window) or Multitary (many), runtime selectable.
///
/// Integrations (all optional except PosixOpt):
///   - PosixOpt: automatically applied to every launch
///   - WindowClient: optional rendering delegate
///   - RawWindowClient: optional low-level delegate
///   - UClientEngine: implemented for WASMA engine compatibility
pub struct PosixWindowLauncher {
    config: Arc<WasmaConfig>,

    /// Option store — applied to every launched window
    opt_store: Arc<RuntimeOptStore>,

    /// Window mode — singularity or multitary
    mode: WindowMode,

    /// Active windows
    windows: Arc<RwLock<HashMap<u64, PosixWindow>>>,

    /// Window ID counter
    next_id: Arc<Mutex<u64>>,

    /// Optional: WindowClient for rendering
    window_client: Option<Arc<Mutex<WindowClient>>>,

    /// Optional: RawWindowClient for low-level delegate
    raw_client: Option<Arc<Mutex<RawWindowClient>>>,

    /// Engine active flag
    active: bool,

    /// SectionMemory for UClientEngine
    memory: SectionMemory,
}

impl PosixWindowLauncher {
    pub fn new(config: WasmaConfig) -> Self {
        let mode = WindowMode::from_config(&config);
        let opt = PosixOpt::from_config(&config);
        let level = config.resource_limits.scope_level;

        Self {
            mode,
            opt_store: Arc::new(RuntimeOptStore::new(opt)),
            windows: Arc::new(RwLock::new(HashMap::new())),
            next_id: Arc::new(Mutex::new(1)),
            window_client: None,
            raw_client: None,
            active: false,
            memory: SectionMemory::new(level),
            config: Arc::new(config),
        }
    }

    pub fn from_config(config: Arc<WasmaConfig>) -> Self {
        let mode = WindowMode::from_config(&config);
        let opt = PosixOpt::from_config(&config);
        let level = config.resource_limits.scope_level;

        Self {
            mode,
            opt_store: Arc::new(RuntimeOptStore::new(opt)),
            windows: Arc::new(RwLock::new(HashMap::new())),
            next_id: Arc::new(Mutex::new(1)),
            window_client: None,
            raw_client: None,
            active: false,
            memory: SectionMemory::new(level),
            config,
        }
    }

    // -------------------------------------------------------------------------
    // OPTIONAL DELEGATE ATTACHMENT
    // -------------------------------------------------------------------------

    /// Attach WindowClient for rendering (optional)
    pub fn attach_window_client(&mut self, wc: Arc<Mutex<WindowClient>>) {
        self.window_client = Some(wc);
        println!("🔗 PosixWindowLauncher: WindowClient attached (rendering delegate)");
    }

    /// Attach RawWindowClient for low-level delegate (optional)
    pub fn attach_raw_client(&mut self, rc: Arc<Mutex<RawWindowClient>>) {
        self.raw_client = Some(rc);
        println!("🔗 PosixWindowLauncher: RawWindowClient attached (low-level delegate)");
    }

    /// Detach WindowClient
    pub fn detach_window_client(&mut self) {
        self.window_client = None;
        println!("🔌 PosixWindowLauncher: WindowClient detached");
    }

    /// Detach RawWindowClient
    pub fn detach_raw_client(&mut self) {
        self.raw_client = None;
        println!("🔌 PosixWindowLauncher: RawWindowClient detached");
    }

    // -------------------------------------------------------------------------
    // MODE CONTROL
    // -------------------------------------------------------------------------

    /// Switch window mode at runtime
    pub fn set_mode(&mut self, mode: WindowMode) {
        println!(
            "🔄 PosixWindowLauncher: Mode {} → {}",
            self.mode.name(),
            mode.name()
        );
        self.mode = mode;
    }

    pub fn mode(&self) -> WindowMode {
        self.mode
    }

    // -------------------------------------------------------------------------
    // OPT OVERRIDE
    // -------------------------------------------------------------------------

    /// Apply a runtime opt override
    pub fn override_opt<F>(&self, f: F)
    where
        F: FnOnce(&mut PosixOpt),
    {
        self.opt_store.override_with(f);
    }

    pub fn opt_store(&self) -> Arc<RuntimeOptStore> {
        self.opt_store.clone()
    }

    // -------------------------------------------------------------------------
    // ID ALLOCATION
    // -------------------------------------------------------------------------

    fn alloc_id(&self) -> u64 {
        let mut n = self.next_id.lock().unwrap();
        let id = *n;
        *n += 1;
        id
    }

    // -------------------------------------------------------------------------
    // WINDOW LAUNCH — Core
    // -------------------------------------------------------------------------

    /// Launch a window from a WindowSpec
    /// In Singularity mode: closes existing window before launching
    /// In Multitary mode: creates alongside existing windows
    pub fn launch(&self, spec: WindowSpec) -> Result<u64, String> {
        // Validate spec
        spec.validate().map_err(|e| e.join(", "))?;

        // Singularity: close all existing windows first
        if self.mode == WindowMode::Singularity {
            let ids: Vec<u64> = { self.windows.read().unwrap().keys().cloned().collect() };
            for id in ids {
                self.close_window(id).ok();
            }
        }

        let id = self.alloc_id();
        let opt = self.opt_store.read();

        // Apply PosixOpt constraints to spec
        let window = PosixWindow::from_spec(id, spec.clone(), &opt);

        println!(
            "🪟 PosixWindowLauncher [{}]: Launching window {} — '{}' [{}x{}] via {} (source: {})",
            self.mode.name(),
            id,
            spec.title,
            window.geometry.width,
            window.geometry.height,
            window.backend.name(),
            spec.source.label(),
        );

        // Optional: delegate to RawWindowClient
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            match raw.create_window(
                &spec.title,
                &spec.app_id,
                window.geometry,
                spec.window_type.clone(),
            ) {
                Ok(raw_id) => println!("   ↳ RawWindowClient delegate: raw window id={}", raw_id),
                Err(e) => println!("   ⚠️  RawWindowClient delegate failed (non-fatal): {}", e),
            }
        }

        // Optional: WindowClient rendering setup
        if let Some(ref wc) = self.window_client {
            let mut client = wc.lock().unwrap();
            client.resize(window.geometry.width, window.geometry.height);
            println!(
                "   ↳ WindowClient rendering configured: {}x{}",
                window.geometry.width, window.geometry.height
            );
        }

        // Apply toolkit theme from PosixOpt
        self.apply_toolkit_theme(&opt, id);

        // Store window
        self.windows.write().unwrap().insert(id, window);
        Ok(id)
    }

    /// Launch from WasmaConfig (config-based launch)
    pub fn launch_from_config(&self) -> Result<u64, String> {
        let spec = WindowSpec::from_config(&self.config);
        println!("📋 PosixWindowLauncher: Launching from config");
        self.launch(spec)
    }

    /// Launch from manifest file content (manifest-based launch)
    pub fn launch_from_manifest(
        &self,
        content: &str,
        path: impl Into<String>,
    ) -> Result<u64, String> {
        let path = path.into();
        let spec = WindowSpec::from_manifest(content, &path);
        println!("📄 PosixWindowLauncher: Launching from manifest: {}", path);
        self.launch(spec)
    }

    /// Apply toolkit theme — PosixOpt auto-application
    fn apply_toolkit_theme(&self, opt: &PosixOpt, window_id: u64) {
        match &opt.draw.toolkit {
            ToolkitTheme::Gtk(gtk) => {
                println!(
                    "   🎨 Toolkit: GTK{} theme='{}' dark={}",
                    gtk.version, gtk.theme_name, gtk.dark_mode
                );
            }
            ToolkitTheme::Iced(iced) => {
                println!("   🎨 Toolkit: Iced theme={:?}", iced.variant);
            }
            ToolkitTheme::Qt(qt) => {
                println!(
                    "   🎨 Toolkit: Qt{} style='{}' dark={}",
                    qt.version, qt.style_name, qt.dark_mode
                );
            }
            ToolkitTheme::None => {
                println!("   🎨 Toolkit: None (raw drawing) for window {}", window_id);
            }
        }
    }

    // -------------------------------------------------------------------------
    // WINDOW OPERATIONS
    // -------------------------------------------------------------------------

    /// Close a window by ID
    pub fn close_window(&self, id: u64) -> Result<(), String> {
        // Optional: notify RawWindowClient delegate
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.destroy_window(id);
        }

        let mut windows = self.windows.write().unwrap();
        if windows.remove(&id).is_some() {
            println!("🗑️  PosixWindowLauncher: Window {} closed", id);
            Ok(())
        } else {
            Err(format!("Window {} not found", id))
        }
    }

    /// Close all windows
    pub fn close_all(&self) {
        let ids: Vec<u64> = self.windows.read().unwrap().keys().cloned().collect();
        for id in ids {
            self.close_window(id).ok();
        }
        println!("🗑️  PosixWindowLauncher: All windows closed");
    }

    /// Set geometry for a window
    pub fn set_geometry(&self, id: u64, geo: WindowGeometry) -> Result<(), String> {
        // Delegate to RawWindowClient if attached
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.set_geometry(id, geo);
        }

        let mut windows = self.windows.write().unwrap();
        match windows.get_mut(&id) {
            Some(w) => {
                w.geometry = geo;
                // Notify WindowClient if attached
                if let Some(ref wc) = self.window_client {
                    let mut client = wc.lock().unwrap();
                    client.resize(geo.width, geo.height);
                }
                Ok(())
            }
            None => Err(format!("Window {} not found", id)),
        }
    }

    /// Set window state
    pub fn set_state(&self, id: u64, state: WindowState) -> Result<(), String> {
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.set_state(id, state.clone());
        }
        let mut windows = self.windows.write().unwrap();
        match windows.get_mut(&id) {
            Some(w) => {
                w.state = state;
                Ok(())
            }
            None => Err(format!("Window {} not found", id)),
        }
    }

    /// Set window focus
    pub fn set_focus(&self, id: u64) -> Result<(), String> {
        // Unfocus all
        {
            let mut windows = self.windows.write().unwrap();
            for w in windows.values_mut() {
                w.focused = false;
            }
        }
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.set_focus(id);
        }
        let mut windows = self.windows.write().unwrap();
        match windows.get_mut(&id) {
            Some(w) => {
                w.focused = true;
                Ok(())
            }
            None => Err(format!("Window {} not found", id)),
        }
    }

    /// Set window visibility
    pub fn set_visible(&self, id: u64, visible: bool) -> Result<(), String> {
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.set_visible(id, visible);
        }
        let mut windows = self.windows.write().unwrap();
        match windows.get_mut(&id) {
            Some(w) => {
                w.visible = visible;
                Ok(())
            }
            None => Err(format!("Window {} not found", id)),
        }
    }

    /// Set window title
    pub fn set_title(&self, id: u64, title: impl Into<String>) -> Result<(), String> {
        let title = title.into();
        if let Some(ref rc) = self.raw_client {
            let raw = rc.lock().unwrap();
            let _ = raw.set_title(id, &title);
        }
        let mut windows = self.windows.write().unwrap();
        match windows.get_mut(&id) {
            Some(w) => {
                w.spec.title = title;
                Ok(())
            }
            None => Err(format!("Window {} not found", id)),
        }
    }

    /// Render a frame to a window
    /// Routes to WindowClient if attached, otherwise via dispatch_data
pub fn render_frame(&self, id: u64, data: &[u8]) -> Result<(), String> {
    let visible = {
        let windows = self.windows.read().unwrap();
        match windows.get(&id) {
            Some(w) => w.visible && !matches!(w.state, WindowState::Hidden),
            None => return Err(format!("Window {} not found", id)),
        }
    };
    if !visible {
        return Ok(());
    }

    // wsdg-open modeli: uygulama kendi render eder, biz dispatch_data ile devam ederiz
    self.dispatch_data(data);
    Ok(())
}
    // -------------------------------------------------------------------------
    // ACCESSORS
    // -------------------------------------------------------------------------

    pub fn get_window(&self, id: u64) -> Option<PosixWindow> {
        self.windows.read().unwrap().get(&id).cloned()
    }

    pub fn list_windows(&self) -> Vec<PosixWindow> {
        let windows = self.windows.read().unwrap();
        let mut v: Vec<_> = windows.values().cloned().collect();
        v.sort_by_key(|w| w.id);
        v
    }

    pub fn window_count(&self) -> usize {
        self.windows.read().unwrap().len()
    }

    pub fn focused_window(&self) -> Option<PosixWindow> {
        let windows = self.windows.read().unwrap();
        windows.values().find(|w| w.focused).cloned()
    }

    pub fn has_window_client(&self) -> bool {
        self.window_client.is_some()
    }
    pub fn has_raw_client(&self) -> bool {
        self.raw_client.is_some()
    }
}

// ============================================================================
// UCLIENTENGINE TRAIT IMPLEMENTATION
// ============================================================================

impl UClientEngine for PosixWindowLauncher {
    fn start_engine(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        self.active = true;

        let opt = self.opt_store.read();
        println!("🟢 WASMA PosixWindowLauncher: Engine Started");
        println!("   Mode:      {}", self.mode.name());
        println!("   Backend:   {}", opt.backend.effective_backend().name());
        println!("   Toolkit:   {}", opt.draw.toolkit.name());
        println!(
            "   Xlinx:     {} | cache={}",
            opt.xlinx.arch.name(),
            opt.xlinx.cache_mode.name()
        );
        println!(
            "   Delegates: WindowClient={} RawClient={}",
            self.window_client.is_some(),
            self.raw_client.is_some()
        );
        drop(opt);

        // Auto-launch from config if no windows exist
        if self.windows.read().unwrap().is_empty() {
            println!("   Auto-launching from config...");
            match self.launch_from_config() {
                Ok(id) => println!("   Auto-launch OK: window id={}", id),
                Err(e) => eprintln!("   ⚠️  Auto-launch failed: {}", e),
            }
        }

        // Simple event loop — yield until stopped
        loop {
            if !self.active {
                break;
            }
            std::thread::sleep(std::time::Duration::from_millis(16)); // ~60fps tick
        }

        Ok(())
    }

    fn dispatch_data(&self, data: &[u8]) {
        // Dispatch to focused window if any
        if let Some(w) = self.focused_window() {
            let _ = self.render_frame(w.id, data);
        }
    }

    fn memory_usage(&self) -> (usize, usize, usize) {
        (
            self.memory.raw_storage.len(),
            self.memory.cell_count,
            self.memory.cell_size,
        )
    }

    fn get_config(&self) -> &WasmaConfig {
        &self.config
    }

    fn shutdown(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        self.active = false;
        self.close_all();
        println!("🛑 PosixWindowLauncher: Shutdown complete");
        Ok(())
    }

    fn is_active(&self) -> bool {
        self.active
    }
}

// ============================================================================
// BUILDER
// ============================================================================

pub struct PosixWindowLauncherBuilder {
    config: Option<WasmaConfig>,
    mode: Option<WindowMode>,
    opt_overrides: Vec<Box<dyn FnOnce(&mut PosixOpt)>>,
    window_client: Option<Arc<Mutex<WindowClient>>>,
    raw_client: Option<Arc<Mutex<RawWindowClient>>>,
}

impl PosixWindowLauncherBuilder {
    pub fn new() -> Self {
        Self {
            config: None,
            mode: None,
            opt_overrides: Vec::new(),
            window_client: None,
            raw_client: None,
        }
    }

    pub fn with_config(mut self, config: WasmaConfig) -> Self {
        self.config = Some(config);
        self
    }

    pub fn with_mode(mut self, mode: WindowMode) -> Self {
        self.mode = Some(mode);
        self
    }

    pub fn with_window_client(mut self, wc: Arc<Mutex<WindowClient>>) -> Self {
        self.window_client = Some(wc);
        self
    }

    pub fn with_raw_client(mut self, rc: Arc<Mutex<RawWindowClient>>) -> Self {
        self.raw_client = Some(rc);
        self
    }

    pub fn opt_override<F: FnOnce(&mut PosixOpt) + 'static>(mut self, f: F) -> Self {
        self.opt_overrides.push(Box::new(f));
        self
    }

    pub fn build(self) -> Result<PosixWindowLauncher, String> {
        let config = self.config.ok_or("WasmaConfig required")?;
        let mut launcher = PosixWindowLauncher::new(config);

        if let Some(mode) = self.mode {
            launcher.mode = mode;
        }

        for f in self.opt_overrides {
            launcher.opt_store.override_with(f);
        }

        if let Some(wc) = self.window_client {
            launcher.attach_window_client(wc);
        }
        if let Some(rc) = self.raw_client {
            launcher.attach_raw_client(rc);
        }

        Ok(launcher)
    }
}

impl Default for PosixWindowLauncherBuilder {
    fn default() -> Self {
        Self::new()
    }
}

// ============================================================================
// TESTS
// ============================================================================

#[cfg(test)]
mod tests {
    use super::*;
    use crate::parser::ConfigParser;
    use crate::wasma_protocol_unix_posix_opt::XlinxCacheMode;

    fn make_config() -> WasmaConfig {
        let parser = ConfigParser::new(None);
        let content = parser.generate_default_config();
        parser.parse(&content).unwrap()
    }

    fn make_launcher() -> PosixWindowLauncher {
        PosixWindowLauncher::new(make_config())
    }

    #[test]
    fn test_launcher_creation() {
        let launcher = make_launcher();
        assert!(!launcher.is_active());
        assert_eq!(launcher.window_count(), 0);
        assert!(!launcher.has_window_client());
        assert!(!launcher.has_raw_client());
        println!(
            "✅ PosixWindowLauncher creation working (mode: {})",
            launcher.mode().name()
        );
    }

    #[test]
    fn test_launch_runtime_spec() {
        let launcher = make_launcher();
        let spec = WindowSpecBuilder::new("test.app", "Test Window")
            .geometry(100, 100, 1280, 720)
            .window_type(WindowType::Normal)
            .decoration(DecorationStyle::ServerSide)
            .build()
            .unwrap();

        let id = launcher.launch(spec).unwrap();
        assert_eq!(launcher.window_count(), 1);

        let window = launcher.get_window(id).unwrap();
        assert_eq!(window.spec.app_id, "test.app");
        assert_eq!(window.geometry.width, 1280);
        assert_eq!(window.geometry.height, 720);
        println!("✅ Runtime spec launch working: id={}", id);
    }

    #[test]
    fn test_launch_from_config() {
        let launcher = make_launcher();
        let id = launcher.launch_from_config().unwrap();
        assert_eq!(launcher.window_count(), 1);
        assert!(launcher.get_window(id).is_some());
        println!("✅ Config-based launch working: id={}", id);
    }

    #[test]
    fn test_launch_from_manifest() {
        let launcher = make_launcher();
        let manifest = "
# Test manifest
app_id=manifest.app
title=Manifest Window
width=1024
height=768
decoration=client
visible=true
focused=false
custom_key=custom_value
";
        let id = launcher
            .launch_from_manifest(manifest, "/etc/wasma/test.spec")
            .unwrap();
        let window = launcher.get_window(id).unwrap();
        assert_eq!(window.spec.app_id, "manifest.app");
        assert_eq!(window.spec.title, "Manifest Window");
        assert_eq!(window.geometry.width, 1024);
        assert_eq!(window.geometry.height, 768);
        assert!(!window.focused);
        assert_eq!(
            window.spec.properties.get("custom_key").map(|s| s.as_str()),
            Some("custom_value")
        );
        println!("✅ Manifest launch working: id={}", id);
    }

    #[test]
    fn test_singularity_mode_replaces() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Singularity);

        let spec1 = WindowSpecBuilder::new("app1", "Win1").build_unchecked();
        let spec2 = WindowSpecBuilder::new("app2", "Win2").build_unchecked();
        let spec3 = WindowSpecBuilder::new("app3", "Win3").build_unchecked();

        launcher.launch(spec1).unwrap();
        assert_eq!(launcher.window_count(), 1);
        launcher.launch(spec2).unwrap();
        assert_eq!(launcher.window_count(), 1); // replaced
        launcher.launch(spec3).unwrap();
        assert_eq!(launcher.window_count(), 1); // replaced again

        let w = launcher.list_windows();
        assert_eq!(w[0].spec.app_id, "app3");
        println!("✅ Singularity mode replacement working");
    }

    #[test]
    fn test_multitary_mode_accumulates() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Multitary);

        for i in 0..4 {
            let spec =
                WindowSpecBuilder::new(format!("app{}", i), format!("Win{}", i)).build_unchecked();
            launcher.launch(spec).unwrap();
        }
        assert_eq!(launcher.window_count(), 4);
        println!(
            "✅ Multitary mode accumulation working: {} windows",
            launcher.window_count()
        );
    }

    #[test]
    fn test_mode_switch_at_runtime() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Multitary);

        for i in 0..3 {
            let spec =
                WindowSpecBuilder::new(format!("a{}", i), format!("W{}", i)).build_unchecked();
            launcher.launch(spec).unwrap();
        }
        assert_eq!(launcher.window_count(), 3);

        // Switch to singularity — next launch clears all
        launcher.set_mode(WindowMode::Singularity);
        let spec = WindowSpecBuilder::new("final.app", "Final").build_unchecked();
        launcher.launch(spec).unwrap();
        assert_eq!(launcher.window_count(), 1);
        println!("✅ Runtime mode switch working");
    }

    #[test]
    fn test_window_operations() {
        let launcher = make_launcher();
        let spec = WindowSpecBuilder::new("ops.app", "Ops Window")
            .geometry(0, 0, 800, 600)
            .build_unchecked();
        let id = launcher.launch(spec).unwrap();

        // Geometry
        let new_geo = WindowGeometry {
            x: 50,
            y: 50,
            width: 1920,
            height: 1080,
        };
        launcher.set_geometry(id, new_geo).unwrap();
        assert_eq!(launcher.get_window(id).unwrap().geometry.width, 1920);

        // State
        launcher.set_state(id, WindowState::Maximized).unwrap();
        assert_eq!(
            launcher.get_window(id).unwrap().state,
            WindowState::Maximized
        );

        // Visibility
        launcher.set_visible(id, false).unwrap();
        assert!(!launcher.get_window(id).unwrap().visible);

        // Title
        launcher.set_title(id, "Updated Title").unwrap();
        assert_eq!(launcher.get_window(id).unwrap().spec.title, "Updated Title");

        println!("✅ Window operations working");
    }

    #[test]
    fn test_focus_management() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Multitary);

        let id1 = launcher
            .launch(WindowSpecBuilder::new("a1", "W1").build_unchecked())
            .unwrap();
        let id2 = launcher
            .launch(WindowSpecBuilder::new("a2", "W2").build_unchecked())
            .unwrap();

        launcher.set_focus(id1).unwrap();
        assert!(launcher.get_window(id1).unwrap().focused);
        assert!(!launcher.get_window(id2).unwrap().focused);
        assert_eq!(launcher.focused_window().unwrap().id, id1);

        launcher.set_focus(id2).unwrap();
        assert!(!launcher.get_window(id1).unwrap().focused);
        assert_eq!(launcher.focused_window().unwrap().id, id2);

        println!("✅ Focus management working");
    }

    #[test]
    fn test_close_window() {
        let launcher = make_launcher();
        let id = launcher.launch_from_config().unwrap();
        assert_eq!(launcher.window_count(), 1);
        launcher.close_window(id).unwrap();
        assert_eq!(launcher.window_count(), 0);
        assert!(launcher.get_window(id).is_none());
        println!("✅ Window close working");
    }

    #[test]
    fn test_close_all() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Multitary);
        for i in 0..5 {
            launcher
                .launch(
                    WindowSpecBuilder::new(format!("a{}", i), format!("W{}", i)).build_unchecked(),
                )
                .unwrap();
        }
        assert_eq!(launcher.window_count(), 5);
        launcher.close_all();
        assert_eq!(launcher.window_count(), 0);
        println!("✅ close_all working");
    }

    #[test]
    fn test_opt_override_applied() {
        let launcher = make_launcher();
        launcher.override_opt(|opt| {
            opt.draw.vsync = false;
            opt.draw.target_fps = Some(144);
            opt.xlinx.cache_mode = XlinxCacheMode::Aggressive;
        });

        let opt = launcher.opt_store.read();
        assert!(!opt.draw.vsync);
        assert_eq!(opt.draw.target_fps, Some(144));
        assert_eq!(opt.xlinx.cache_mode, XlinxCacheMode::Aggressive);
        println!("✅ Opt override applied correctly");
    }

    #[test]
    fn test_posix_opt_min_size_constraint() {
        let config = make_config();
        let mut launcher = PosixWindowLauncher::new(config);
        // Set min size via opt
        launcher.override_opt(|opt| {
            opt.draw.size.min_width = 500;
            opt.draw.size.min_height = 400;
        });

        // Launch with smaller geometry
        let spec = WindowSpecBuilder::new("small.app", "Small")
            .geometry(0, 0, 100, 100) // smaller than min
            .build_unchecked();
        let id = launcher.launch(spec).unwrap();
        let w = launcher.get_window(id).unwrap();
        // Should be clamped to min
        assert!(w.geometry.width >= 500);
        assert!(w.geometry.height >= 400);
        println!(
            "✅ PosixOpt min size constraint applied: {}x{}",
            w.geometry.width, w.geometry.height
        );
    }

    #[test]
    fn test_spec_from_manifest_invalid_values() {
        let launcher = make_launcher();
        let manifest = "
app_id=broken.app
title=Broken
width=notanumber
height=600
";
        let id = launcher
            .launch_from_manifest(manifest, "/tmp/broken.spec")
            .unwrap();
        let w = launcher.get_window(id).unwrap();
        // Invalid width should fall back to default (800)
        assert_eq!(w.spec.geometry.width, 800);
        println!("✅ Manifest invalid value fallback working");
    }

    #[test]
    fn test_uclient_engine_trait_object() {
        let launcher: Box<dyn UClientEngine> = Box::new(make_launcher());
        assert!(!launcher.is_active());
        let (total, cells, _) = launcher.memory_usage();
        assert!(total > 0 && cells > 0);
        println!("✅ UClientEngine trait object (PosixWindowLauncher) working");
    }

    #[test]
    fn test_builder() {
        let config = make_config();
        let launcher = PosixWindowLauncherBuilder::new()
            .with_config(config)
            .with_mode(WindowMode::Multitary)
            .opt_override(|opt| opt.draw.antialiasing = false)
            .build()
            .unwrap();

        assert_eq!(launcher.mode(), WindowMode::Multitary);
        assert!(!launcher.opt_store.read().draw.antialiasing);
        println!("✅ PosixWindowLauncherBuilder working");
    }

    #[test]
    fn test_list_windows_sorted() {
        let mut launcher = make_launcher();
        launcher.set_mode(WindowMode::Multitary);
        for i in 0..4 {
            launcher
                .launch(
                    WindowSpecBuilder::new(format!("a{}", i), format!("W{}", i)).build_unchecked(),
                )
                .unwrap();
        }
        let windows = launcher.list_windows();
        assert_eq!(windows.len(), 4);
        for pair in windows.windows(2) {
            assert!(pair[0].id < pair[1].id);
        }
        println!("✅ list_windows sorted correctly");
    }
}