"""
Tests for BATON-007: Verifying real Telegram delivery when a signal is sent.

Acceptance criteria:
1. After pressing the button, a message physically appears in the Telegram group.
   (verified: send_message is called with correct content containing user name)
2. journalctl -u baton does NOT throw ERROR during send.
   (verified: no exception is raised when Telegram returns 200)
3. A repeated request is also delivered.
   (verified: two consecutive signals each trigger send_message)

NOTE: These tests verify that send_message is called with correct parameters.
Physical delivery to an actual Telegram group is outside unit test scope.
"""
from __future__ import annotations

import asyncio
import os

os.environ.setdefault("BOT_TOKEN", "test-bot-token")
os.environ.setdefault("CHAT_ID", "-1001234567890")
os.environ.setdefault("WEBHOOK_SECRET", "test-webhook-secret")
os.environ.setdefault("WEBHOOK_URL", "https://example.com/api/webhook/telegram")
os.environ.setdefault("FRONTEND_ORIGIN", "http://localhost:3000")
os.environ.setdefault("ADMIN_TOKEN", "test-admin-token")

import json
from unittest.mock import AsyncMock, patch

import httpx
import pytest
import respx
from httpx import AsyncClient

from tests.conftest import make_app_client

# Valid UUID v4 constants — must not collide with UUIDs in other test files
_UUID_A = "d0000001-0000-4000-8000-000000000001"
_UUID_B = "d0000002-0000-4000-8000-000000000002"
_UUID_C = "d0000003-0000-4000-8000-000000000003"
_UUID_D = "d0000004-0000-4000-8000-000000000004"
_UUID_E = "d0000005-0000-4000-8000-000000000005"


async def _register(client: AsyncClient, uuid: str, name: str) -> str:
    r = await client.post("/api/register", json={"uuid": uuid, "name": name})
    assert r.status_code == 200, f"Registration failed: {r.status_code} {r.text}"
    return r.json()["api_key"]


# ---------------------------------------------------------------------------
# Criterion 1 — send_message is called with text containing the user's name
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_signal_send_message_called_with_user_name():
    """Criterion 1: send_message is invoked with text that includes the sender's name."""
    sent_texts: list[str] = []

    async def _capture(text: str) -> None:
        sent_texts.append(text)

    async with make_app_client() as client:
        api_key = await _register(client, _UUID_A, "AliceBaton")

        with patch("backend.telegram.send_message", side_effect=_capture):
            resp = await client.post(
                "/api/signal",
                json={"user_id": _UUID_A, "timestamp": 1742478000000},
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)  # yield to event loop so background task runs

    assert resp.status_code == 200
    assert len(sent_texts) == 1, f"Expected 1 send_message call, got {len(sent_texts)}"
    assert "AliceBaton" in sent_texts[0], (
        f"Expected user name 'AliceBaton' in Telegram message, got: {sent_texts[0]!r}"
    )


@pytest.mark.asyncio
async def test_signal_send_message_text_contains_signal_keyword():
    """Criterion 1: Telegram message text contains the word 'Сигнал'."""
    sent_texts: list[str] = []

    async def _capture(text: str) -> None:
        sent_texts.append(text)

    async with make_app_client() as client:
        api_key = await _register(client, _UUID_B, "BobBaton")

        with patch("backend.telegram.send_message", side_effect=_capture):
            await client.post(
                "/api/signal",
                json={"user_id": _UUID_B, "timestamp": 1742478000000},
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)

    assert len(sent_texts) == 1
    assert "Сигнал" in sent_texts[0], (
        f"Expected 'Сигнал' keyword in message, got: {sent_texts[0]!r}"
    )


@pytest.mark.asyncio
async def test_signal_with_geo_send_message_contains_coordinates():
    """Criterion 1: when geo is provided, Telegram message includes lat/lon coordinates."""
    sent_texts: list[str] = []

    async def _capture(text: str) -> None:
        sent_texts.append(text)

    async with make_app_client() as client:
        api_key = await _register(client, _UUID_C, "GeoUser")

        with patch("backend.telegram.send_message", side_effect=_capture):
            await client.post(
                "/api/signal",
                json={
                    "user_id": _UUID_C,
                    "timestamp": 1742478000000,
                    "geo": {"lat": 55.7558, "lon": 37.6173, "accuracy": 15.0},
                },
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)

    assert len(sent_texts) == 1
    assert "55.7558" in sent_texts[0], (
        f"Expected lat '55.7558' in message, got: {sent_texts[0]!r}"
    )
    assert "37.6173" in sent_texts[0], (
        f"Expected lon '37.6173' in message, got: {sent_texts[0]!r}"
    )


@pytest.mark.asyncio
async def test_signal_without_geo_send_message_contains_no_geo_label():
    """Criterion 1: when geo is null, Telegram message contains 'Без геолокации'."""
    sent_texts: list[str] = []

    async def _capture(text: str) -> None:
        sent_texts.append(text)

    async with make_app_client() as client:
        api_key = await _register(client, _UUID_D, "NoGeoUser")

        with patch("backend.telegram.send_message", side_effect=_capture):
            await client.post(
                "/api/signal",
                json={"user_id": _UUID_D, "timestamp": 1742478000000, "geo": None},
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)

    assert len(sent_texts) == 1
    assert "Без геолокации" in sent_texts[0], (
        f"Expected 'Без геолокации' in message, got: {sent_texts[0]!r}"
    )


# ---------------------------------------------------------------------------
# Criterion 2 — No ERROR logged on successful send (service stays alive)
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_signal_send_message_no_error_on_200_response():
    """Criterion 2: send_message does not raise when Telegram returns 200."""
    from backend import config as _cfg
    from backend.telegram import send_message

    send_url = f"https://api.telegram.org/bot{_cfg.BOT_TOKEN}/sendMessage"

    # Must complete without exception
    with respx.mock(assert_all_called=False) as mock:
        mock.post(send_url).mock(return_value=httpx.Response(200, json={"ok": True}))
        await send_message("Test signal delivery")  # should not raise


@pytest.mark.asyncio
async def test_signal_send_message_uses_configured_chat_id():
    """Criterion 2: send_message POSTs to Telegram with the configured CHAT_ID."""
    from backend import config as _cfg
    from backend.telegram import send_message

    send_url = f"https://api.telegram.org/bot{_cfg.BOT_TOKEN}/sendMessage"

    with respx.mock(assert_all_called=False) as mock:
        route = mock.post(send_url).mock(
            return_value=httpx.Response(200, json={"ok": True})
        )
        await send_message("Delivery check")

    assert route.called
    body = json.loads(route.calls[0].request.content)
    assert body["chat_id"] == _cfg.CHAT_ID, (
        f"Expected chat_id={_cfg.CHAT_ID!r}, got {body['chat_id']!r}"
    )


# ---------------------------------------------------------------------------
# Criterion 3 — Repeated requests are also delivered
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_repeated_signals_each_trigger_send_message():
    """Criterion 3: two consecutive signals each cause a separate send_message call."""
    sent_texts: list[str] = []

    async def _capture(text: str) -> None:
        sent_texts.append(text)

    async with make_app_client() as client:
        api_key = await _register(client, _UUID_E, "RepeatUser")

        with patch("backend.telegram.send_message", side_effect=_capture):
            r1 = await client.post(
                "/api/signal",
                json={"user_id": _UUID_E, "timestamp": 1742478000001},
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)

            r2 = await client.post(
                "/api/signal",
                json={"user_id": _UUID_E, "timestamp": 1742478000002},
                headers={"Authorization": f"Bearer {api_key}"},
            )
            await asyncio.sleep(0)

    assert r1.status_code == 200
    assert r2.status_code == 200
    assert len(sent_texts) == 2, (
        f"Expected 2 send_message calls for 2 signals, got {len(sent_texts)}"
    )


@pytest.mark.asyncio
async def test_repeated_signals_produce_incrementing_signal_ids():
    """Criterion 3: repeated signals are each stored and return distinct incrementing signal_ids."""
    async with make_app_client() as client:
        api_key = await _register(client, _UUID_E, "RepeatUser2")
        r1 = await client.post(
            "/api/signal",
            json={"user_id": _UUID_E, "timestamp": 1742478000001},
            headers={"Authorization": f"Bearer {api_key}"},
        )
        r2 = await client.post(
            "/api/signal",
            json={"user_id": _UUID_E, "timestamp": 1742478000002},
            headers={"Authorization": f"Bearer {api_key}"},
        )

    assert r1.status_code == 200
    assert r2.status_code == 200
    assert r2.json()["signal_id"] > r1.json()["signal_id"], (
        "Second signal must have a higher signal_id than the first"
    )