# -*- coding: utf-8 -*-
"""Contains Windows Taskbar related functionality.

Unfortunatelly the newly implemented `ctypes` interface is not working. From what I
learned during my research is that the `comtypes` interface is able to support the
`IUnkwown*` (or "early-binding") interfaces. That may not be the main reason. But, if
it was working before let's not break it and keep the old code.

Here is the code for future reference:

.. code-block:: python
    import ctypes
    from ctypes import wintypes

    # Constants for taskbar progress states
    TBPF_NOPROGRESS = 0
    TBPF_INDETERMINATE = 0x1
    TBPF_NORMAL = 0x2
    TBPF_ERROR = 0x4
    TBPF_PAUSED = 0x8


    # Define the ITaskbarList3 interface
    class ITaskbarList3(ctypes.Structure):
        _fields_ = [
            ("SetProgressValue", ctypes.c_void_p),
            ("SetProgressState", ctypes.c_void_p),
            # Add other methods if needed
        ]


    # Load the Shell32.dll and get the ITaskbarList3 interface
    shell32 = ctypes.windll.shell32

    ITaskbarList3_ptr = ctypes.POINTER(ITaskbarList3)
    CoCreateInstance = ctypes.windll.ole32.CoCreateInstance
    CLSID_TaskbarList = ctypes.c_char_p(b"{56FDF344-FD6D-11d0-958A-006097C9A090}")
    IID_ITaskbarList3 = ctypes.c_char_p(b"{EA1AFB91-9E28-4B86-90E9-9E9F8A5EEFAF}")


    class Taskbar:
        def __init__(self, frame, maxv=100):
            self.frame = frame
            self.maxv = maxv
            self.taskbar = self._create_taskbar_instance()

        def _create_taskbar_instance(self):
            taskbar = ITaskbarList3_ptr()
            hr = CoCreateInstance(
                ctypes.byref(ctypes.c_void_p(CLSID_TaskbarList)),
                None,
                1,  # CLSCTX_INPROC_SERVER
                ctypes.byref(IID_ITaskbarList3),
                ctypes.byref(taskbar),
            )
            if hr != 0:
                raise ctypes.WinError(hr)
            return taskbar

        def set_progress_value(self, value):
            if self.frame:
                hwnd = self.frame.GetHandle()
                self.taskbar.contents.SetProgressValue(hwnd, value, self.maxv)

        def set_progress_state(self, state):
            if self.frame:
                hwnd = self.frame.GetHandle()
                self.taskbar.contents.SetProgressState(hwnd, state)

"""
import comtypes.gen.TaskbarLib as tbl
import comtypes.client as cc


TBPF_NOPROGRESS = 0
TBPF_INDETERMINATE = 0x1
TBPF_NORMAL = 0x2
TBPF_ERROR = 0x4
TBPF_PAUSED = 0x8

taskbar = cc.CreateObject(
    "{56FDF344-FD6D-11d0-958A-006097C9A090}", interface=tbl.ITaskbarList3
)
taskbar.HrInit()


class Taskbar:
    def __init__(self, frame, maxv=100):
        self.frame = frame
        self.maxv = maxv

    def set_progress_value(self, value):
        if self.frame:
            taskbar.SetProgressValue(self.frame.GetHandle(), value, self.maxv)

    def set_progress_state(self, state):
        if self.frame:
            taskbar.SetProgressState(self.frame.GetHandle(), state)