"""Integration tests for the unified WebSocket handler (Step 5).

Tests the device WS endpoint with home_request and popup_request frames,
verifying that the correct v3 frame sequence is returned.

LLM calls are mocked to avoid network dependency.
"""

from __future__ import annotations

import json
from unittest.mock import patch

import pytest

from app.db import get_session
from app.main import app
from app.schemas import WsFrameType
from tests.conftest import TEST_USER_IDS, make_jwt

USER_ID = TEST_USER_IDS["power"]


# ── helpers ───────────────────────────────────────────────────────────────────

@pytest.fixture(autouse=True)
def _override_db(db_session):
    async def _gen():
        yield db_session

    app.dependency_overrides[get_session] = _gen
    yield
    app.dependency_overrides.pop(get_session, None)


def _recv_until_end(ws, max_frames: int = 20) -> list[dict]:
    """Receive frames until stream_end (or stream_end inside popup flow), or max_frames."""
    frames = []
    for _ in range(max_frames):
        raw = ws.receive_text()
        frame = json.loads(raw)
        frames.append(frame)
        if frame.get("type") == WsFrameType.stream_end:
            break
    return frames


async def _mock_home_stream(user_id, message, context, reg=None):
    yield "task_agent", ""
    yield "task_agent", '{"type": "text", "content": "Hello"}'


async def _mock_popup_stream(user_id, message, context, reg=None):
    yield "task_agent", ""
    yield "task_agent", "Here is a summary"


# ── tests ─────────────────────────────────────────────────────────────────────

def test_home_request_produces_stream_frames(client):
    """home_request → stream_start, stream_text+, stream_end."""
    token = make_jwt("power", user_id=USER_ID)

    with patch("app.api.routes.device_ws.orchestrate_v3_stream", side_effect=_mock_home_stream):
        with client.websocket_connect(f"/api/v1/ws/device?token={token}") as ws:
            ws.send_text(json.dumps({
                "type": "device_hello", "device_id": "dev-1", "agent_ids": []
            }))
            ws.send_text(json.dumps({
                "type": "home_request",
                "request_id": "r1",
                "message": "List my tasks",
                "conversation_history": [],
            }))
            frames = _recv_until_end(ws)

    types = [f["type"] for f in frames]
    assert WsFrameType.stream_start in types
    assert WsFrameType.stream_end in types
    assert types.index(WsFrameType.stream_start) < types.index(WsFrameType.stream_end)


def test_popup_request_produces_domain_frame(client):
    """popup_request → popup_domain first, then stream_text*, stream_end."""
    token = make_jwt("power", user_id=USER_ID)

    with patch("app.api.routes.device_ws.orchestrate_v3_stream", side_effect=_mock_popup_stream):
        with client.websocket_connect(f"/api/v1/ws/device?token={token}") as ws:
            ws.send_text(json.dumps({
                "type": "device_hello", "device_id": "dev-2", "agent_ids": []
            }))
            ws.send_text(json.dumps({
                "type": "popup_request",
                "request_id": "p1",
                "message": "Summarize this task",
                "scope": {"type": "task", "id": "task-123"},
            }))
            frames = _recv_until_end(ws)

    types = [f["type"] for f in frames]
    assert WsFrameType.popup_domain in types
    assert WsFrameType.stream_end in types
    assert types.index(WsFrameType.popup_domain) < types.index(WsFrameType.stream_end)

    domain_frame = next(f for f in frames if f["type"] == WsFrameType.popup_domain)
    assert domain_frame["domain"] == "tasks"
    assert domain_frame["request_id"] == "p1"


def test_home_request_request_id_propagated(client):
    """request_id in home_request is echoed in all response frames."""
    token = make_jwt("power", user_id=USER_ID)
    req_id = "my-unique-req-id"

    async def _stream(user_id, message, context, reg=None):
        yield "note_agent", ""
        yield "note_agent", '{"type": "text", "content": "ok"}'

    with patch("app.api.routes.device_ws.orchestrate_v3_stream", side_effect=_stream):
        with client.websocket_connect(f"/api/v1/ws/device?token={token}") as ws:
            ws.send_text(json.dumps({
                "type": "device_hello", "device_id": "dev-3", "agent_ids": []
            }))
            ws.send_text(json.dumps({
                "type": "home_request",
                "request_id": req_id,
                "message": "hello",
            }))
            frames = _recv_until_end(ws)

    for f in frames:
        if "request_id" in f:
            assert f["request_id"] == req_id


def test_tool_result_dispatch_silent_on_unknown_id(client):
    """tool_result for unknown call_id is silently ignored — no crash."""
    token = make_jwt("power", user_id=USER_ID)

    with patch("app.api.routes.device_ws._HEARTBEAT_INTERVAL", 0.05):
        with client.websocket_connect(f"/api/v1/ws/device?token={token}") as ws:
            ws.send_text(json.dumps({
                "type": "device_hello", "device_id": "dev-4", "agent_ids": []
            }))
            ws.send_text(json.dumps({
                "type": "tool_result", "id": "no-such-id", "ok": True
            }))
            # If connection is still alive, we'll get the heartbeat ping
            msg = json.loads(ws.receive_text())
            assert msg["type"] == "ping"


def test_invalid_jwt_rejected(client):
    """Connection with bad token is closed before or after accept."""
    with pytest.raises(Exception):
        with client.websocket_connect("/api/v1/ws/device?token=badtoken") as ws:
            ws.receive_text()