# ========================================================================== #
#                                                                            #
#    KVMD - The main Pi-KVM daemon.                                          #
#                                                                            #
#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
#                                                                            #
#    This program is free software: you can redistribute it and/or modify    #
#    it under the terms of the GNU General Public License as published by    #
#    the Free Software Foundation, either version 3 of the License, or       #
#    (at your option) any later version.                                     #
#                                                                            #
#    This program is distributed in the hope that it will be useful,         #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
#    GNU General Public License for more details.                            #
#                                                                            #
#    You should have received a copy of the GNU General Public License       #
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
#                                                                            #
# ========================================================================== #


from typing import Tuple
from typing import Dict
from typing import Iterable
from typing import AsyncGenerator
from typing import Any

from .... import aiomulti

from ....yamlconf import Option

from ....validators.basic import valid_bool
from ....validators.basic import valid_int_f1
from ....validators.basic import valid_float_f01
from ....validators.os import valid_abs_path

from .. import BaseHid

from .usb import UsbDeviceController
from .keyboard import KeyboardProcess
from .mouse import MouseProcess


# =====
class Plugin(BaseHid):
    def __init__(  # pylint: disable=super-init-not-called
        self,
        keyboard: Dict[str, Any],
        mouse: Dict[str, Any],
        noop: bool,
        udc: str,  # XXX: Not from options, see /kvmd/apps/kvmd/__init__.py for details
    ) -> None:

        self.__notifier = aiomulti.AioProcessNotifier()

        self.__udc = UsbDeviceController(udc)

        self.__keyboard_proc = KeyboardProcess(udc=self.__udc, noop=noop, notifier=self.__notifier, **keyboard)
        self.__mouse_proc = MouseProcess(udc=self.__udc, noop=noop, notifier=self.__notifier, **mouse)

    @classmethod
    def get_plugin_options(cls) -> Dict:
        return {
            "keyboard": {
                "device":              Option("",  type=valid_abs_path, unpack_as="device_path"),
                "select_timeout":      Option(1.0, type=valid_float_f01),
                "write_retries":       Option(5,   type=valid_int_f1),
                "write_retries_delay": Option(0.1, type=valid_float_f01),
                "reopen_delay":        Option(0.5, type=valid_float_f01),
            },
            "mouse": {
                "device":              Option("",  type=valid_abs_path, unpack_as="device_path"),
                "select_timeout":      Option(1.0, type=valid_float_f01),
                "write_retries":       Option(5,   type=valid_int_f1),
                "write_retries_delay": Option(0.1, type=valid_float_f01),
                "reopen_delay":        Option(0.5, type=valid_float_f01),
                "absolute":            Option(True, type=valid_bool),
                "horizontal_wheel":    Option(True, type=valid_bool),
            },
            "noop": Option(False, type=valid_bool),
        }

    def sysprep(self) -> None:
        self.__udc.find()
        self.__keyboard_proc.start()
        self.__mouse_proc.start()

    async def get_state(self) -> Dict:
        keyboard_state = await self.__keyboard_proc.get_state()
        mouse_state = await self.__mouse_proc.get_state()
        outputs: Dict = {"available": {}, "active": ""}
        return {
            "online": True,
            "keyboard": {
                "online": keyboard_state["online"],
                "leds": {
                    "caps": keyboard_state["caps"],
                    "scroll": keyboard_state["scroll"],
                    "num": keyboard_state["num"],
                },
                "outputs": outputs,
            },
            "mouse": {**mouse_state, "outputs": outputs},
        }

    async def poll_state(self) -> AsyncGenerator[Dict, None]:
        prev_state: Dict = {}
        while True:
            state = await self.get_state()
            if state != prev_state:
                yield state
                prev_state = state
            await self.__notifier.wait()

    async def reset(self) -> None:
        self.__keyboard_proc.send_reset_event()
        self.__mouse_proc.send_reset_event()

    async def cleanup(self) -> None:
        try:
            self.__keyboard_proc.cleanup()
        finally:
            self.__mouse_proc.cleanup()

    # =====

    def send_key_events(self, keys: Iterable[Tuple[str, bool]]) -> None:
        self.__keyboard_proc.send_key_events(keys)

    def send_mouse_button_event(self, button: str, state: bool) -> None:
        self.__mouse_proc.send_button_event(button, state)

    def send_mouse_move_event(self, to_x: int, to_y: int) -> None:
        self.__mouse_proc.send_move_event(to_x, to_y)

    def send_mouse_relative_event(self, delta_x: int, delta_y: int) -> None:
        self.__mouse_proc.send_relative_event(delta_x, delta_y)

    def send_mouse_wheel_event(self, delta_x: int, delta_y: int) -> None:
        self.__mouse_proc.send_wheel_event(delta_x, delta_y)

    def clear_events(self) -> None:
        self.__keyboard_proc.send_clear_event()
        self.__mouse_proc.send_clear_event()