from __future__ import annotations

import json

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

from app.api import httpsms


def make_app() -> FastAPI:
    app = FastAPI()
    app.include_router(httpsms.router)
    return app


def test_sms_requires_configured_api_key(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.delenv("HTTPSMS_API_KEY", raising=False)
    with TestClient(make_app()) as client:
        response = client.post("/v1/sms/send", json={
            "from": "+2348012345678", "to": "+2348098765432", "content": "test"
        })
    assert response.status_code == 503


def test_sms_validates_e164_phone_numbers() -> None:
    with TestClient(make_app()) as client:
        response = client.post("/v1/sms/send", json={
            "from": "08012345678", "to": "+2348098765432", "content": "test"
        })
    assert response.status_code == 422


def test_sms_forwards_official_request(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setenv("HTTPSMS_API_KEY", "test-secret")
    monkeypatch.setenv("HTTPSMS_API_BASE_URL", "https://api.httpsms.com")
    seen: dict[str, object] = {}

    async def handler(request: httpx.Request) -> httpx.Response:
        seen["url"] = str(request.url)
        seen["headers"] = dict(request.headers)
        seen["body"] = json.loads(request.content)
        return httpx.Response(202, json={"id": "msg-test", "status": "queued"})

    original_client = httpx.AsyncClient
    def mock_client(**kwargs: object) -> httpx.AsyncClient:
        return original_client(transport=httpx.MockTransport(handler), **kwargs)

    monkeypatch.setattr(httpsms.httpx, "AsyncClient", mock_client)
    with TestClient(make_app()) as client:
        response = client.post("/v1/sms/send", json={
            "from": "+2348012345678", "to": "+2348098765432", "content": "hello"
        })
    assert response.status_code == 200
    assert seen["url"] == "https://api.httpsms.com/v1/messages/send"
    assert seen["headers"]["x-api-key"] == "test-secret"
    assert seen["body"] == {
        "from": "+2348012345678", "to": "+2348098765432", "content": "hello"
    }
    assert response.json()["result"]["id"] == "msg-test"


def test_sms_rejects_non_https_upstream(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setenv("HTTPSMS_API_KEY", "test-secret")
    monkeypatch.setenv("HTTPSMS_API_BASE_URL", "http://127.0.0.1:8000")
    with TestClient(make_app()) as client:
        response = client.post("/v1/sms/send", json={
            "from": "+2348012345678", "to": "+2348098765432", "content": "hello"
        })
    assert response.status_code == 503