//! ThoughtSync desktop (Tauri v2).
//!
//! The window loads the shared Vue 3 frontend (`../../frontend`). The Rust core will
//! own the on-device SQLite store (M10.4) and the opt-in sync engine (M10.7), which
//! the frontend reaches through the `frontend/src/adapters/` seam (M10.3) over Tauri
//! `invoke`. Today it exposes desktop integration (menu-entry install for the Linux
//! AppImage) and boots the UI.

mod integration;

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    #[cfg(target_os = "linux")]
    harden_linux_webkit_rendering();

    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![
            integration::integration_status,
            integration::integrate_desktop,
            integration::unintegrate_desktop,
        ])
        .run(tauri::generate_context!())
        .expect("error while running the ThoughtSync desktop app");
}

/// WebKitGTK's GPU-accelerated rendering (the DMA-BUF renderer + EGL compositing) fails
/// to initialize on a wide range of Linux GPU/driver/Wayland setups — "Could not create
/// default EGL display: EGL_BAD_PARAMETER" → a black/blank window. This is a well-known
/// WebKitGTK issue that hits Tauri apps broadly, NOT app-specific. Tauri's guidance
/// (https://v2.tauri.app/develop/debug/linux-graphics/) is to force the software
/// fallbacks at startup, before the webview is created, so end users don't have to.
///
/// We apply the fix ONLY for AppImage launches (where these failures cluster and where
/// bundled libs are in play), leaving each var overridable — native (.deb) installs use
/// system libs and keep GPU acceleration untouched. WebKit software rendering is plenty
/// for this UI.
#[cfg(target_os = "linux")]
fn harden_linux_webkit_rendering() {
    let is_appimage =
        std::env::var_os("APPIMAGE").is_some() || std::env::var_os("APPDIR").is_some();
    if !is_appimage {
        return;
    }
    // Ordered per Tauri's escalation ladder; each set only if the user hasn't chosen.
    for (key, value) in [
        ("__NV_DISABLE_EXPLICIT_SYNC", "1"),
        ("WEBKIT_DISABLE_DMABUF_RENDERER", "1"),
        ("WEBKIT_DISABLE_COMPOSITING_MODE", "1"),
    ] {
        if std::env::var_os(key).is_none() {
            std::env::set_var(key, value);
        }
    }
}