"""Tests for event parsing and handling."""

from typing import Any, Final

import pytest

import tcod.event

import tcod.sdl.sys

from tcod._internal import _check

from tcod.cffi import ffi, lib

from tcod.event import KeySym, Modifier, Scancode

EXPECTED_EVENTS: Final = (

tcod.event.Quit(),

tcod.event.KeyDown(scancode=Scancode.A, sym=KeySym.A, mod=Modifier(0), pressed=True),

tcod.event.KeyUp(scancode=Scancode.A, sym=KeySym.A, mod=Modifier(0), pressed=False),

)

"""Events to compare with after passing though the SDL event queue."""

def as_sdl_event(event: tcod.event.Event) -> dict[str, dict[str, Any]]:

"""Convert events into SDL_Event unions using cffi's union format."""

match event:

case tcod.event.Quit():

return {"quit": {"type": lib.SDL_EVENT_QUIT}}

case tcod.event.KeyboardEvent():

return {

"key": {

"type": (lib.SDL_EVENT_KEY_UP, lib.SDL_EVENT_KEY_DOWN)[event.pressed],

"scancode": event.scancode,

"key": event.sym,

"mod": event.mod,

"down": event.pressed,

"repeat": event.repeat,

}

}

raise AssertionError

EVENT_PACK: Final = ffi.new("SDL_Event[]", [as_sdl_event(_e) for _e in EXPECTED_EVENTS])

"""A custom C array of SDL_Event unions based on EXPECTED_EVENTS."""

def push_events() -> None:

"""Reset the SDL event queue to an expected list of events."""

tcod.sdl.sys.init(tcod.sdl.sys.Subsystem.EVENTS) # Ensure SDL event queue is enabled

lib.SDL_PumpEvents() # Clear everything from the queue

lib.SDL_FlushEvents(lib.SDL_EVENT_FIRST, lib.SDL_EVENT_LAST)

assert _check( # Fill the queue with EVENT_PACK

lib.SDL_PeepEvents(EVENT_PACK, len(EVENT_PACK), lib.SDL_ADDEVENT, lib.SDL_EVENT_FIRST, lib.SDL_EVENT_LAST)

) == len(EVENT_PACK)

def test_get_events() -> None:

push_events()

assert tuple(tcod.event.get()) == EXPECTED_EVENTS

assert tuple(tcod.event.get()) == ()

assert tuple(tcod.event.wait(timeout=0)) == ()

push_events()

assert tuple(tcod.event.wait()) == EXPECTED_EVENTS

def test_event_dispatch() -> None:

push_events()

with pytest.deprecated_call():

tcod.event.EventDispatch().event_wait(timeout=0)

push_events()

with pytest.deprecated_call():

tcod.event.EventDispatch().event_get()