# mousehook.py
import ctypes
from ctypes import wintypes, c_void_p, sizeof
import win32gui
import threading

user32 = ctypes.windll.user32
kernel32 = ctypes.windll.kernel32

WM_LBUTTONDBLCLK = 0x0203
WH_MOUSE_LL = 14

# Fix for ULONG_PTR
if sizeof(c_void_p) == 8:
    ULONG_PTR = ctypes.c_uint64
else:
    ULONG_PTR = ctypes.c_uint32

class MSLLHOOKSTRUCT(ctypes.Structure):
    _fields_ = [("pt", wintypes.POINT),
                ("mouseData", wintypes.DWORD),
                ("flags", wintypes.DWORD),
                ("time", wintypes.DWORD),
                ("dwExtraInfo", ULONG_PTR)]

class MouseHook:
    def __init__(self, target_hwnd, callback):
        self.target_hwnd = target_hwnd
        self.callback = callback
        self.hooked = None
        self.running = False

    def _low_level_mouse_proc(self, nCode, wParam, lParam):
        if nCode == 0:
            mouse_struct = ctypes.cast(lParam, ctypes.POINTER(MSLLHOOKSTRUCT)).contents
            hwnd_under_cursor = win32gui.WindowFromPoint((mouse_struct.pt.x, mouse_struct.pt.y))

            if hwnd_under_cursor == self.target_hwnd and wParam == WM_LBUTTONDBLCLK:
                print("✅ Double-click blocked from VLC — calling toggle_fullscreen()")
                self.callback()
                return 1  # block event

        return user32.CallNextHookEx(self.hooked, nCode, wParam, lParam)

    def start(self):
        self.running = True
        CMPFUNC = ctypes.WINFUNCTYPE(ctypes.c_int, ctypes.c_int, ctypes.c_int, ctypes.c_void_p)
        self.pointer = CMPFUNC(self._low_level_mouse_proc)
        h_module = kernel32.GetModuleHandleW(None)
        self.hooked = user32.SetWindowsHookExW(WH_MOUSE_LL, self.pointer, h_module, 0)

        msg = wintypes.MSG()
        while user32.GetMessageW(ctypes.byref(msg), 0, 0, 0) != 0:
            user32.TranslateMessage(ctypes.byref(msg))
            user32.DispatchMessageW(ctypes.byref(msg))

    def stop(self):
        self.running = False
        if self.hooked:
            user32.UnhookWindowsHookEx(self.hooked)
            self.hooked = None