"""Offline-тесты приёмника GlitchTip webhook-алертов
(POST /api/v1/trade-in/ops/glitchtip-webhook) — app/api/v1/glitchtip.py.

Проверяет HTTP-контракт: успешная пересылка issue-/uptime-алертов в
Telegram (клиент замокан), отказ без валидного секрета, отказ при
несконфигурированных настройках, обрезка длинного текста под лимит Telegram
(4096), graceful-обработка неизвестной формы payload (НЕ 500).

NEVER touches real DB / real Telegram API.
"""

from __future__ import annotations

import os

os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")

import json
from typing import Any, ClassVar

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from app.api.v1 import glitchtip as glitchtip_module
from app.services.tgbot.client import TelegramApiError

_SECRET = "test-shared-secret"
_ENDPOINT = "/api/v1/trade-in/ops/glitchtip-webhook"


@pytest.fixture(autouse=True)
def _configured(monkeypatch: pytest.MonkeyPatch) -> None:
    """По умолчанию вебхук полностью сконфигурирован — отдельные тесты
    переопределяют конкретные поля."""
    monkeypatch.setattr(glitchtip_module.settings, "tradein_internal_auth_secret", _SECRET)
    monkeypatch.setattr(glitchtip_module.settings, "telegram_bot_token", "fake-token")
    monkeypatch.setattr(glitchtip_module.settings, "telegram_alerts_chat_id", -1004443088679)
    monkeypatch.setattr(glitchtip_module.settings, "telegram_alerts_topic_id", 158)


class _FakeTelegramClient:
    """Подменяет `TelegramClient` внутри модуля `glitchtip` — никакого httpx/сети."""

    calls: ClassVar[list[dict[str, Any]]] = []
    _response: ClassVar[dict[str, Any] | Exception] = {"message_id": 1}

    def __init__(self, _token: str) -> None:
        pass

    async def send_message(self, **kwargs: Any) -> dict[str, Any]:
        _FakeTelegramClient.calls.append(kwargs)
        if isinstance(_FakeTelegramClient._response, Exception):
            raise _FakeTelegramClient._response
        return _FakeTelegramClient._response


@pytest.fixture(autouse=True)
def _fake_telegram_client(monkeypatch: pytest.MonkeyPatch) -> Any:
    _FakeTelegramClient.calls = []
    _FakeTelegramClient._response = {"message_id": 1}
    monkeypatch.setattr(glitchtip_module, "TelegramClient", _FakeTelegramClient)
    return _FakeTelegramClient


@pytest.fixture
def client() -> TestClient:
    app = FastAPI()
    app.include_router(glitchtip_module.router, prefix="/api/v1/trade-in")
    return TestClient(app)


_ISSUE_PAYLOAD = {
    "text": "GlitchTip Alert",
    "attachments": [
        {
            "title": "ValueError: something broke",
            "title_link": "https://errors.gendsgn.ru/organizations/gendesign/issues/123/",
            "text": "app/services/foo.py in bar",
            "color": "#e03131",
            "fields": [
                {"title": "Project", "value": "tradein-backend", "short": True},
                {"title": "Environment", "value": "production", "short": True},
            ],
            "mrkdown_in": ["text"],
        }
    ],
}

_UPTIME_PAYLOAD = {
    "text": "GlitchTip Uptime Alert",
    "attachments": [
        {
            "title": "gendsgn.ru",
            "title_link": "https://errors.gendsgn.ru/organizations/gendesign/uptime/1/",
            "text": "The monitored site has gone down.",
            "image_url": None,
            "color": None,
            "fields": None,
            "mrkdown_in": None,
        }
    ],
}


# ── успешная пересылка ──────────────────────────────────────────────────────


def test_issue_alert_forwarded_to_telegram(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_ISSUE_PAYLOAD)

    assert r.status_code == 200, r.text
    assert r.json() == {"status": "ok"}
    assert len(_fake_telegram_client.calls) == 1
    call = _fake_telegram_client.calls[0]
    assert call["chat_id"] == -1004443088679
    assert call["message_thread_id"] == 158
    assert "ValueError: something broke" in call["text"]
    assert "tradein-backend" in call["text"]  # Project field
    assert "errors.gendsgn.ru" in call["text"]


def test_uptime_alert_forwarded_to_telegram(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_UPTIME_PAYLOAD)

    assert r.status_code == 200, r.text
    assert len(_fake_telegram_client.calls) == 1
    call = _fake_telegram_client.calls[0]
    assert "GlitchTip Uptime Alert" in call["text"]
    assert "gone down" in call["text"]
    assert call["message_thread_id"] == 158


def test_telegram_failure_returns_502_not_500(
    client: TestClient, _fake_telegram_client: Any
) -> None:
    _FakeTelegramClient._response = TelegramApiError("sendMessage", 400, "chat not found")

    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_ISSUE_PAYLOAD)

    assert r.status_code == 502
    assert r.status_code != 500


# ── auth ─────────────────────────────────────────────────────────────────────


def test_missing_secret_401(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(_ENDPOINT, json=_ISSUE_PAYLOAD)

    assert r.status_code == 401
    assert _fake_telegram_client.calls == []


def test_wrong_secret_401(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(f"{_ENDPOINT}?secret=wrong-value", json=_ISSUE_PAYLOAD)

    assert r.status_code == 401
    assert _fake_telegram_client.calls == []


def test_secret_not_configured_returns_503_not_500(
    client: TestClient, monkeypatch: pytest.MonkeyPatch, _fake_telegram_client: Any
) -> None:
    monkeypatch.setattr(glitchtip_module.settings, "tradein_internal_auth_secret", "")

    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_ISSUE_PAYLOAD)

    assert r.status_code == 503
    assert r.status_code != 500
    assert _fake_telegram_client.calls == []


def test_bot_not_configured_returns_503(
    client: TestClient, monkeypatch: pytest.MonkeyPatch, _fake_telegram_client: Any
) -> None:
    monkeypatch.setattr(glitchtip_module.settings, "telegram_bot_token", "")

    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_ISSUE_PAYLOAD)

    assert r.status_code == 503
    assert _fake_telegram_client.calls == []


def test_alerts_chat_id_not_configured_returns_503(
    client: TestClient, monkeypatch: pytest.MonkeyPatch, _fake_telegram_client: Any
) -> None:
    monkeypatch.setattr(glitchtip_module.settings, "telegram_alerts_chat_id", 0)

    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=_ISSUE_PAYLOAD)

    assert r.status_code == 503
    assert _fake_telegram_client.calls == []


# ── обрезка длинного текста ─────────────────────────────────────────────────


def test_long_payload_truncated_to_telegram_limit(
    client: TestClient, _fake_telegram_client: Any
) -> None:
    huge_payload = {
        "text": "GlitchTip Alert",
        "attachments": [
            {
                "title": "Huge issue",
                "title_link": "https://errors.gendsgn.ru/x",
                "text": "x" * 10000,
            }
        ],
    }

    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=huge_payload)

    assert r.status_code == 200, r.text
    sent_text = _fake_telegram_client.calls[0]["text"]
    assert len(sent_text) <= 4096
    assert sent_text.endswith("(обрезано)")


def test_unknown_form_huge_raw_body_truncated(
    client: TestClient, _fake_telegram_client: Any
) -> None:
    r = client.post(
        f"{_ENDPOINT}?secret={_SECRET}",
        content=("x" * 10000).encode(),
        headers={"content-type": "application/json"},
    )

    assert r.status_code == 200, r.text
    sent_text = _fake_telegram_client.calls[0]["text"]
    assert len(sent_text) <= 4096


# ── неизвестная форма payload — НЕ 500 ──────────────────────────────────────


def test_unknown_json_shape_forwarded_with_marker(
    client: TestClient, _fake_telegram_client: Any
) -> None:
    """Ни `text`, ни `attachments` — форма, которую GlitchTip НЕ шлёт сегодня,
    но контракт задачи требует не падать 500, а переслать как есть."""
    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json={"some_field": "some_value", "n": 42})

    assert r.status_code == 200, r.text
    sent_text = _fake_telegram_client.calls[0]["text"]
    assert "неизвестный формат" in sent_text
    assert "some_value" in sent_text


def test_non_json_body_forwarded_not_500(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(
        f"{_ENDPOINT}?secret={_SECRET}",
        content=b"not-json-at-all {{{",
        headers={"content-type": "text/plain"},
    )

    assert r.status_code == 200, r.text
    sent_text = _fake_telegram_client.calls[0]["text"]
    assert "неизвестный формат" in sent_text
    assert "not-json-at-all" in sent_text


def test_json_array_body_forwarded_not_500(client: TestClient, _fake_telegram_client: Any) -> None:
    """Валидный JSON, но не объект (top-level list) — тоже неизвестная форма."""
    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", json=[1, 2, 3])

    assert r.status_code == 200, r.text
    assert len(_fake_telegram_client.calls) == 1


def test_empty_body_forwarded_not_500(client: TestClient, _fake_telegram_client: Any) -> None:
    r = client.post(f"{_ENDPOINT}?secret={_SECRET}", content=b"")

    assert r.status_code == 200, r.text
    assert len(_fake_telegram_client.calls) == 1


# ── формат сообщения ─────────────────────────────────────────────────────────


def test_message_format_json_roundtrip(client: TestClient, _fake_telegram_client: Any) -> None:
    """Sanity: убеждаемся, что тестовый payload реально валиден как JSON (не
    полагаемся на literal dict без проверки сериализации)."""
    body = json.dumps(_ISSUE_PAYLOAD)
    r = client.post(
        f"{_ENDPOINT}?secret={_SECRET}",
        content=body.encode(),
        headers={"content-type": "application/json"},
    )
    assert r.status_code == 200, r.text