import os
import time
from typing import Optional

import win32api
import win32gui
import win32process
import wmi


def get_app_path(hwnd) -> Optional[str]:
    """Get application path given hwnd."""
    path = None

    _, pid = win32process.GetWindowThreadProcessId(hwnd)
    process = win32api.OpenProcess(
        0x0400, False, pid
    )  # PROCESS_QUERY_INFORMATION = 0x0400

    try:
        path = win32process.GetModuleFileNameEx(process, 0)
    finally:
        win32api.CloseHandle(process)

    return path


def get_app_name(hwnd) -> Optional[str]:
    """Get application filename given hwnd."""
    path = get_app_path(hwnd)

    if path is None:
        return None

    return os.path.basename(path)


def get_window_title(hwnd):
    return win32gui.GetWindowText(hwnd)


def get_active_window_handle():
    hwnd = win32gui.GetForegroundWindow()
    return hwnd


# WMI-version, used as fallback if win32gui/win32process/win32api fails (such as for "run as admin" processes)

c = wmi.WMI()

"""
Much of this derived from: http://stackoverflow.com/a/14973422/965332
"""


def get_app_name_wmi(hwnd) -> Optional[str]:
    """Get application filename given hwnd."""
    name = None
    _, pid = win32process.GetWindowThreadProcessId(hwnd)
    for p in c.query("SELECT Name FROM Win32_Process WHERE ProcessId = %s" % str(pid)):
        name = p.Name
        break
    return name


def get_app_path_wmi(hwnd) -> Optional[str]:
    """Get application path given hwnd."""
    path = None

    _, pid = win32process.GetWindowThreadProcessId(hwnd)
    for p in c.query(
        "SELECT ExecutablePath FROM Win32_Process WHERE ProcessId = %s" % str(pid)
    ):
        path = p.ExecutablePath
        break

    return path


if __name__ == "__main__":
    while True:
        hwnd = get_active_window_handle()
        print("Title:", get_window_title(hwnd))
        print("App:        ", get_app_name(hwnd))
        print("App (wmi):  ", get_app_name_wmi(hwnd))
        print("Path:       ", get_app_path(hwnd))
        print("Path (wmi): ", get_app_path_wmi(hwnd))

        time.sleep(1.0)