"""카카오 챗봇 Event API — 연결된 사장님에게 챗봇이 먼저 말을 거는 통로.

여기서 지키는 것 셋:
  1. 요청 모양(주소·인증 헤더·본문)이 공식 규격 그대로다 — 어긋나면 카카오가 조용히 거절한다
  2. 실패는 예외로 올라온다 — 알림이 안 간 것을 성공으로 넘기면 승인 알림이 통째로 사라진다
  3. 예외 문구에 키·발화자 ID 가 없다 — 이 문자열은 로그로 가고 로그는 우리만 보지 않는다
"""

import json

import httpx
import pytest

from services.external import kakao_event

BOT_ID = "0123456789abcdef01234567"
REST_KEY = "test-rest-api-key-0123456789"
SPEAKER = "test-bot-user-key-abc"


@pytest.fixture(autouse=True)
def configured(monkeypatch):
    monkeypatch.setenv("KAKAO_BOT_ID", BOT_ID)
    monkeypatch.setenv("KAKAO_BOT_REST_API_KEY", REST_KEY)
    monkeypatch.delenv("KAKAO_EVENT_DEV", raising=False)


def _client(handler) -> httpx.AsyncClient:
    return httpx.AsyncClient(transport=httpx.MockTransport(handler))


def test_not_configured_without_bot_id_or_rest_key(monkeypatch):
    assert kakao_event.is_configured() is True
    monkeypatch.setenv("KAKAO_BOT_REST_API_KEY", "")
    assert kakao_event.is_configured() is False
    monkeypatch.setenv("KAKAO_BOT_REST_API_KEY", REST_KEY)
    monkeypatch.setenv("KAKAO_BOT_ID", "")
    assert kakao_event.is_configured() is False


async def test_send_posts_the_documented_request_shape():
    seen = {}

    def handler(request: httpx.Request) -> httpx.Response:
        seen["url"] = str(request.url)
        seen["auth"] = request.headers["Authorization"]
        seen["body"] = json.loads(request.content)
        return httpx.Response(200, json={"taskId": "task-1", "status": "SUCCESS", "message": ""})

    async with _client(handler) as client:
        task_id = await kakao_event.send(
            SPEAKER, "post_approval", data={"text": "hello"}, params={"post_id": "p-1"}, client=client
        )

    assert task_id == "task-1"
    assert seen["url"] == f"https://bot-api.kakao.com/v2/bots/{BOT_ID}/talk"
    assert seen["auth"] == f"KakaoAK {REST_KEY}"
    assert seen["body"] == {
        "event": {"name": "post_approval", "data": {"text": "hello"}},
        "user": [{"type": "botUserKey", "id": SPEAKER}],
        "params": {"post_id": "p-1"},
    }


async def test_send_omits_data_and_params_when_not_given():
    seen = {}

    def handler(request: httpx.Request) -> httpx.Response:
        seen["body"] = json.loads(request.content)
        return httpx.Response(200, json={"taskId": "task-2", "status": "SUCCESS"})

    async with _client(handler) as client:
        await kakao_event.send(SPEAKER, "post_approval", client=client)

    assert seen["body"]["event"] == {"name": "post_approval"}
    assert "params" not in seen["body"]


async def test_dev_channel_appends_bang_to_bot_id(monkeypatch):
    monkeypatch.setenv("KAKAO_EVENT_DEV", "1")
    seen = {}

    def handler(request: httpx.Request) -> httpx.Response:
        seen["url"] = str(request.url)
        return httpx.Response(200, json={"taskId": "task-3", "status": "SUCCESS"})

    async with _client(handler) as client:
        await kakao_event.send(SPEAKER, "post_approval", client=client)

    assert seen["url"] == f"https://bot-api.kakao.com/v2/bots/{BOT_ID}!/talk"


async def test_http_error_raises_without_leaking_secrets():
    def handler(request: httpx.Request) -> httpx.Response:
        return httpx.Response(401, json={"message": "invalid key"})

    async with _client(handler) as client:
        with pytest.raises(kakao_event.KakaoEventError) as info:
            await kakao_event.send(SPEAKER, "post_approval", client=client)

    assert "401" in str(info.value)
    assert REST_KEY not in str(info.value) and SPEAKER not in str(info.value)
    # 진단용 원문은 str 이 아니라 속성에만 — 로그로 가는 건 str(ex) 뿐이다.
    assert "invalid key" in info.value.detail


async def test_non_success_status_raises():
    def handler(request: httpx.Request) -> httpx.Response:
        return httpx.Response(200, json={"taskId": "task-4", "status": "FAIL", "message": "no event"})

    async with _client(handler) as client:
        with pytest.raises(kakao_event.KakaoEventError):
            await kakao_event.send(SPEAKER, "post_approval", client=client)


async def test_send_refuses_when_not_configured(monkeypatch):
    monkeypatch.setenv("KAKAO_BOT_REST_API_KEY", "")

    async with _client(lambda request: httpx.Response(200, json={})) as client:
        with pytest.raises(kakao_event.KakaoEventError, match="NOT_CONFIGURED"):
            await kakao_event.send(SPEAKER, "post_approval", client=client)