"""Unit tests for the streamer: drive it with a fake WsClient + MockSDR."""

from __future__ import annotations

import asyncio

import numpy as np

from ria_toolkit_oss.agent.streamer import (
    Streamer,
    _apply_sdr_config,
    _samples_to_interleaved_float32,
)
from ria_toolkit_oss.sdr.mock import MockSDR


class FakeWs:
    def __init__(self):
        self.json_sent: list[dict] = []
        self.bytes_sent: list[bytes] = []

    async def send_json(self, payload: dict) -> None:
        self.json_sent.append(payload)

    async def send_bytes(self, data: bytes) -> None:
        self.bytes_sent.append(data)


def _factory(device: str, identifier):
    return MockSDR(buffer_size=32, seed=0)


def test_samples_to_interleaved_float32_roundtrip():
    c = np.array([1 + 2j, 3 + 4j], dtype=np.complex64)
    raw = _samples_to_interleaved_float32(c)
    arr = np.frombuffer(raw, dtype=np.float32)
    assert arr.tolist() == [1.0, 2.0, 3.0, 4.0]


def test_apply_sdr_config_sets_attributes():
    sdr = MockSDR(buffer_size=16)
    _apply_sdr_config(sdr, {"sample_rate": 2e6, "center_frequency": 9.15e8, "gain": 30})
    assert sdr.sample_rate == 2e6
    assert sdr.center_freq == 9.15e8
    assert sdr.gain == 30


def test_heartbeat_reflects_status_and_app():
    s = Streamer(ws=FakeWs(), sdr_factory=_factory)
    hb = s.build_heartbeat()
    assert hb["type"] == "heartbeat"
    assert hb["status"] == "idle"
    s._status = "streaming"
    s._app_id = "app-42"
    hb2 = s.build_heartbeat()
    assert hb2["status"] == "streaming"
    assert hb2["app_id"] == "app-42"


def test_full_start_stream_stop_cycle():
    async def scenario():
        ws = FakeWs()
        streamer = Streamer(ws=ws, sdr_factory=_factory)

        await streamer.on_message(
            {
                "type": "start",
                "app_id": "abc",
                "radio_config": {
                    "device": "mock",
                    "sample_rate": 1_000_000,
                    "center_frequency": 2.45e9,
                    "gain": 40,
                    "buffer_size": 64,
                },
            }
        )
        for _ in range(30):
            if len(ws.bytes_sent) >= 2:
                break
            await asyncio.sleep(0.02)
        await streamer.on_message({"type": "stop", "app_id": "abc"})
        return ws, streamer

    ws, streamer = asyncio.run(scenario())
    assert len(ws.bytes_sent) >= 1
    for frame in ws.bytes_sent:
        assert len(frame) == 64 * 2 * 4  # 64 samples × (I,Q) × float32
    statuses = [m for m in ws.json_sent if m.get("type") == "status"]
    assert statuses[0]["status"] == "streaming"
    assert statuses[-1]["status"] == "idle"
    assert streamer._sdr is None


def test_start_without_device_emits_error():
    async def scenario():
        ws = FakeWs()
        streamer = Streamer(ws=ws, sdr_factory=_factory)
        await streamer.on_message({"type": "start", "app_id": "x", "radio_config": {}})
        return ws

    ws = asyncio.run(scenario())
    errors = [m for m in ws.json_sent if m.get("type") == "error"]
    assert errors and "device" in errors[0]["message"]


def test_configure_queues_update():
    async def scenario():
        streamer = Streamer(ws=FakeWs(), sdr_factory=_factory)
        await streamer.on_message(
            {"type": "configure", "app_id": "x", "radio_config": {"center_frequency": 915e6}}
        )
        return streamer._pending_config

    pending = asyncio.run(scenario())
    assert pending == {"center_frequency": 915e6}


def test_unknown_message_type_is_ignored():
    async def scenario():
        s = Streamer(ws=FakeWs(), sdr_factory=_factory)
        await s.on_message({"type": "nope"})

    asyncio.run(scenario())