# Copyright 2021-2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import asyncio
import logging
import sys
from typing import Optional

import websockets.asyncio.server

import bumble.logging
from bumble import data_types, decoder, gatt
from bumble.core import AdvertisingData
from bumble.device import AdvertisingParameters, Device
from bumble.profiles import asha
from bumble.transport import open_transport

ws_connection: Optional[websockets.asyncio.server.ServerConnection] = None
g722_decoder = decoder.G722Decoder()


async def ws_server(ws_client: websockets.asyncio.server.ServerConnection):
    global ws_connection
    ws_connection = ws_client

    async for message in ws_client:
        print(message)


# -----------------------------------------------------------------------------
async def main() -> None:
    if len(sys.argv) != 3:
        print('Usage: python run_asha_sink.py <device-config> <transport-spec>')
        print('example: python run_asha_sink.py device1.json usb:0')
        return

    async with await open_transport(sys.argv[2]) as hci_transport:
        device = Device.from_config_file_with_hci(
            sys.argv[1], hci_transport.source, hci_transport.sink
        )

        def on_audio_packet(packet: bytes) -> None:
            global ws_connection
            if ws_connection:
                offset = 1
                while offset < len(packet):
                    pcm_data = g722_decoder.decode_frame(packet[offset : offset + 80])
                    offset += 80
                    asyncio.get_running_loop().create_task(ws_connection.send(pcm_data))
            else:
                logging.info("No active client")

        asha_service = asha.AshaService(
            capability=0,
            hisyncid=b'\x01\x02\x03\x04\x05\x06\x07\x08',
            device=device,
            audio_sink=on_audio_packet,
        )
        device.add_service(asha_service)

        # Set the advertising data
        advertising_data = (
            bytes(
                AdvertisingData(
                    [
                        data_types.CompleteLocalName(device.name),
                        data_types.Flags(AdvertisingData.Flags(0x06)),
                        data_types.IncompleteListOf16BitServiceUUIDs(
                            [gatt.GATT_ASHA_SERVICE]
                        ),
                    ]
                )
            )
            + asha_service.get_advertising_data()
        )

        # Go!
        await device.power_on()
        await device.create_advertising_set(
            auto_restart=True,
            advertising_data=advertising_data,
            advertising_parameters=AdvertisingParameters(
                primary_advertising_interval_min=100,
                primary_advertising_interval_max=100,
            ),
        )

        await websockets.asyncio.server.serve(ws_server, port=8888)

        await hci_transport.source.terminated


# -----------------------------------------------------------------------------
bumble.logging.setup_basic_logging('DEBUG')
asyncio.run(main())