"""End-to-end: local websockets server drives a Streamer's TX path."""

from __future__ import annotations

import asyncio
import json
import time

import numpy as np
import websockets

from ria_toolkit_oss.agent.config import AgentConfig
from ria_toolkit_oss.agent.streamer import Streamer
from ria_toolkit_oss.agent.ws_client import WsClient
from ria_toolkit_oss.sdr.mock import MockSDR


class RecordingMockSDR(MockSDR):
    def __init__(self, buffer_size: int):
        super().__init__(buffer_size=buffer_size)
        self.tx_produced: list[np.ndarray] = []

    def _stream_tx(self, callback):
        self._enable_tx = True
        self._tx_initialized = True
        while self._enable_tx:
            result = callback(self.rx_buffer_size)
            self.tx_produced.append(np.asarray(result).copy())
            time.sleep(0.005)


def _iq_frame(samples: np.ndarray) -> bytes:
    interleaved = np.empty(samples.size * 2, dtype=np.float32)
    interleaved[0::2] = samples.real
    interleaved[1::2] = samples.imag
    return interleaved.tobytes()


def test_server_tx_start_binary_stop_cycle_over_real_ws():
    BUF = 16
    sdr = RecordingMockSDR(buffer_size=BUF)
    marker = np.arange(BUF, dtype=np.complex64) + 1

    async def scenario():
        control_frames: list[dict] = []
        done = asyncio.Event()

        async def server_handler(ws):
            try:
                # Drain initial heartbeat.
                first = await asyncio.wait_for(ws.recv(), timeout=2.0)
                control_frames.append(json.loads(first))

                await ws.send(
                    json.dumps(
                        {
                            "type": "tx_start",
                            "app_id": "tx-app",
                            "radio_config": {
                                "device": "mock",
                                "buffer_size": BUF,
                                "tx_sample_rate": 1_000_000,
                                "tx_center_frequency": 2.45e9,
                                "tx_gain": -20,
                                "underrun_policy": "zero",
                            },
                        }
                    )
                )

                # Push a few binary IQ frames.
                for _ in range(3):
                    await ws.send(_iq_frame(marker))

                # Wait for at least "armed" + "transmitting" statuses.
                for _ in range(100):
                    msg = await asyncio.wait_for(ws.recv(), timeout=2.0)
                    if isinstance(msg, str):
                        control_frames.append(json.loads(msg))
                    if any(f.get("type") == "tx_status" and f.get("state") == "transmitting" for f in control_frames):
                        break

                await ws.send(json.dumps({"type": "tx_stop", "app_id": "tx-app"}))

                # Drain trailing statuses.
                try:
                    while True:
                        msg = await asyncio.wait_for(ws.recv(), timeout=0.5)
                        if isinstance(msg, str):
                            control_frames.append(json.loads(msg))
                except (asyncio.TimeoutError, Exception):
                    pass
            finally:
                done.set()

        server = await websockets.serve(server_handler, "127.0.0.1", 0)
        port = server.sockets[0].getsockname()[1]
        try:
            client = WsClient(
                f"ws://127.0.0.1:{port}",
                token="",
                heartbeat_interval=10.0,
                reconnect_pause=0.05,
            )
            streamer = Streamer(
                ws=client,
                sdr_factory=lambda d, i: sdr,
                cfg=AgentConfig(tx_enabled=True),
            )
            task = asyncio.create_task(
                client.run(
                    on_message=streamer.on_message,
                    heartbeat=streamer.build_heartbeat,
                    on_binary=streamer.on_binary,
                )
            )
            await asyncio.wait_for(done.wait(), timeout=5.0)
            client.stop()
            task.cancel()
            try:
                await task
            except (asyncio.CancelledError, Exception):
                pass
        finally:
            server.close()
            await server.wait_closed()
        return control_frames, streamer

    controls, streamer = asyncio.run(scenario())

    # Heartbeat reached the server.
    assert any(f.get("type") == "heartbeat" for f in controls)
    # tx_status lifecycle: armed → transmitting → done.
    tx_states = [f["state"] for f in controls if f.get("type") == "tx_status"]
    assert tx_states[0] == "armed"
    assert "transmitting" in tx_states
    assert tx_states[-1] == "done"
    # TX callback saw our marker buffer at least once.
    assert any(np.array_equal(b, marker) for b in sdr.tx_produced)
    # Session cleared.
    assert streamer._tx is None