// Windows platform state management

use std::sync::{Mutex, atomic::{AtomicBool, AtomicPtr}};
use std::time::Instant;
use winapi::{
    shared::windef::POINT,
    shared::minwindef::DWORD,
};
use ::image::RgbaImage;
use once_cell::sync::{Lazy, OnceCell};

use super::types::*;

// --- Thread-Safe Static Variables ---

// Use AtomicBool for simple flags
pub static CURSOR_HIDDEN: AtomicBool = AtomicBool::new(false);
pub static CTRL_HANDLER_REGISTERED: AtomicBool = AtomicBool::new(false);

// Use Lazy<Mutex<T>> for complex Option types
pub static ORIGINAL_CURSORS: Lazy<Mutex<Option<Vec<(DWORD, SyncHCURSOR)>>>> = Lazy::new(|| Mutex::new(None));
pub static CURRENT_CURSOR_IMAGE: Lazy<Mutex<Option<RgbaImage>>> = Lazy::new(|| Mutex::new(None));
pub static LAST_CURSOR_POS: Lazy<Mutex<Option<POINT>>> = Lazy::new(|| Mutex::new(None));

// Use Lazy<Mutex<Option<Handle>>> for WinAPI handles with our thread-safe wrappers
pub static CURSOR_WINDOW: Lazy<Mutex<Option<SyncHWND>>> = Lazy::new(|| Mutex::new(None));
pub static CURSOR_BITMAP: Lazy<Mutex<Option<SyncHBITMAP>>> = Lazy::new(|| Mutex::new(None));
pub static CURSOR_DC: Lazy<Mutex<Option<SyncHDC>>> = Lazy::new(|| Mutex::new(None));

// Mouse hook related variables
pub static MOUSE_HOOK_HANDLE: Lazy<Mutex<Option<SyncHHOOK>>> = Lazy::new(|| Mutex::new(None));
// This one is for CallNextHookEx to avoid locking inside the hook callback
pub static CURRENT_HOOK_FOR_CALLBACK: AtomicPtr<std::os::raw::c_void> =
    AtomicPtr::new(std::ptr::null_mut());
pub static LAST_MOUSE_MOVE_TIME: Lazy<Mutex<Option<Instant>>> = Lazy::new(|| Mutex::new(None));

// Use OnceCell for INIT to avoid `static mut`
pub static INIT: OnceCell<()> = OnceCell::new();

// Reset system cursors using the Windows API
pub fn reset_system_cursors() {
    unsafe {
        // Use both versions for maximum compatibility
        winapi::um::winuser::SystemParametersInfoW(
            winapi::um::winuser::SPI_SETCURSORS,
            0,
            std::ptr::null_mut(),
            0
        );

        // Import the Windows API function to reset system cursors
        #[link(name = "user32")]
        extern "system" {
            fn SystemParametersInfoA(uiAction: u32, uiParam: u32, pvParam: *mut std::ffi::c_void, fWinIni: u32) -> i32;
        }

        SystemParametersInfoA(
            SPI_SETCURSORS_A,
            0,
            std::ptr::null_mut(),
            SPIF_UPDATEINIFILE | SPIF_SENDCHANGE
        );
    }
}