# testExplorer -

import os
import time

import pythoncom
import win32api
import win32com.client.dynamic
import win32con
import win32gui
import winerror
from win32com.client import Dispatch
from win32com.test.util import CheckClean

bVisibleEventFired = 0

# These are errors we might see when this is run in automation (eg, on GitHub)
# Not sure exactly what -2125463506 is, but google shows it's a common error
# possibly related to how IE is configured WRT site permissions etc.
HRESULTS_IN_AUTOMATION = [-2125463506, winerror.MK_E_UNAVAILABLE]


class ExplorerEvents:
    def OnVisible(self, visible):
        global bVisibleEventFired
        bVisibleEventFired = 1


def TestExplorerEvents():
    global bVisibleEventFired
    try:
        iexplore = win32com.client.DispatchWithEvents(
            "InternetExplorer.Application", ExplorerEvents
        )
    except pythoncom.com_error as exc:
        # In automation we see this error trying to connect to events
        # It's a little surprising that the non-event tests seem to work, but
        # whatever...
        if exc.hresult not in HRESULTS_IN_AUTOMATION:
            raise
        print("IE events appear to not be available, so skipping this test")
        return

    iexplore.Visible = 1
    assert bVisibleEventFired, "The IE event did not appear to fire!"
    iexplore.Quit()
    iexplore = None

    bVisibleEventFired = 0
    ie = win32com.client.Dispatch("InternetExplorer.Application")
    ie_events = win32com.client.DispatchWithEvents(ie, ExplorerEvents)
    ie.Visible = 1
    assert bVisibleEventFired, "The IE event did not appear to fire!"
    ie.Quit()
    ie = None
    print("IE Event tests worked.")


def TestObjectFromWindow():
    # Check we can use ObjectFromLresult to get the COM object from the
    hwnd = win32gui.FindWindow("IEFrame", None)
    # Thanks https://stackoverflow.com/a/10154498/18450412 for the child stack on IE8+
    for child_class in (
        "Frame Tab",
        "TabWindowClass",
        "Shell DocObject View",
        "Internet Explorer_Server",
    ):
        hwnd = win32gui.FindWindowEx(hwnd, 0, child_class, None)
    # Once you have an 'Internet Explorer_Server',
    # you can send a message and use ObjectFromLresult to get it back.
    msg = win32gui.RegisterWindowMessage("WM_HTML_GETOBJECT")
    rc, result = win32gui.SendMessageTimeout(
        hwnd, msg, 0, 0, win32con.SMTO_ABORTIFHUNG, 1000
    )
    ob = pythoncom.ObjectFromLresult(result, pythoncom.IID_IDispatch, 0)
    doc = Dispatch(ob)
    # just to prove it works, set the background color of the document.
    for color in "red green blue orange white".split():
        doc.bgColor = color
        time.sleep(0.2)


def TestExplorer(iexplore):
    if not iexplore.Visible:
        iexplore.Visible = -1
    filename = os.path.join(os.path.dirname(__file__), "..\\readme.html")
    iexplore.Navigate(win32api.GetFullPathName(filename))
    win32api.Sleep(1000)
    TestObjectFromWindow()
    win32api.Sleep(3000)
    try:
        iexplore.Quit()
    except (AttributeError, pythoncom.com_error):
        # User got sick of waiting :)
        pass


def TestAll():
    try:
        try:
            try:
                iexplore = win32com.client.dynamic.Dispatch(
                    "InternetExplorer.Application"
                )
            except pythoncom.com_error as exc:
                if exc.hresult not in HRESULTS_IN_AUTOMATION:
                    raise
                print("IE appears to not be available, so skipping this test")
                return

            TestExplorer(iexplore)

            win32api.Sleep(1000)
            iexplore = None

            # Test IE events.
            TestExplorerEvents()
            # Give IE a chance to shutdown, else it can get upset on fast machines.
            time.sleep(2)

            # Note that the TextExplorerEvents will force makepy - hence
            # this gencache is really no longer needed.

            from win32com.client import gencache

            gencache.EnsureModule("{EAB22AC0-30C1-11CF-A7EB-0000C05BAE0B}", 0, 1, 1)
            iexplore = win32com.client.Dispatch("InternetExplorer.Application")
            TestExplorer(iexplore)
        except pythoncom.com_error as exc:
            if exc.hresult != winerror.RPC_E_DISCONNECTED:  # user closed the app!
                raise
    finally:
        iexplore = None


if __name__ == "__main__":
    TestAll()
    CheckClean()