import pytest
import httpx
from unittest.mock import patch, AsyncMock
from datetime import date

from room_cal.api import create_app
from room_cal.api._routes import _serialize


# ── _serialize ─────────────────────────────────────────────────────────────────

def test_serialize_date():
  assert _serialize(date(2026, 1, 15)) == '2026-01-15'


def test_serialize_nested_dict():
  result = _serialize({'a': date(2026, 1, 1), 'b': 42})
  assert result == {'a': '2026-01-01', 'b': 42}


def test_serialize_list():
  result = _serialize([date(2026, 2, 1), 'x', 7])
  assert result == ['2026-02-01', 'x', 7]


def test_serialize_passthrough():
  assert _serialize(42) == 42
  assert _serialize('hello') == 'hello'
  assert _serialize(None) is None


# ── app factory ────────────────────────────────────────────────────────────────

def test_create_app():
  from fastapi import FastAPI
  assert isinstance(create_app(), FastAPI)


# ── HTTP tests ─────────────────────────────────────────────────────────────────

@pytest.fixture
def app():
  return create_app()


@pytest.fixture
async def client(app):
  async with httpx.AsyncClient(transport=httpx.ASGITransport(app=app), base_url='http://test') as c:
    yield c


_AUTHED = {'sub': 'u', 'email': 'u@test.com', 'name': 'User'}


@pytest.mark.asyncio
async def test_calc_net_to_list(client):
  r = await client.get('/calc/net_to_list?service=airbnb&amount=100')
  assert r.status_code == 200
  data = r.json()
  assert data['net'] == 100
  assert data['list'] > data['net']
  assert 'retail' in data
  assert 'details' in data


@pytest.mark.asyncio
async def test_calc_unknown_transformation(client):
  r = await client.get('/calc/bad_transform?service=airbnb&amount=100')
  assert r.status_code == 404


@pytest.mark.asyncio
async def test_calc_bad_service(client):
  r = await client.get('/calc/net_to_list?service=nonexistent&amount=100')
  assert r.status_code == 400


@pytest.mark.asyncio
async def test_auth_middleware_calc_is_public(client):
  # /calc/ prefix is public — no auth cookie needed
  r = await client.get('/calc/net_to_list?service=airbnb&amount=50')
  assert r.status_code == 200


@pytest.mark.asyncio
async def test_auth_middleware_private_api_returns_401(client):
  r = await client.get('/prices/2026-01-01')
  assert r.status_code == 401


@pytest.mark.asyncio
async def test_auth_middleware_html_path_redirects_to_login(client):
  r = await client.get('/calendar', follow_redirects=False)
  assert r.status_code in (302, 307)
  assert '/auth/login' in r.headers['location']


@pytest.mark.asyncio
async def test_workflow_discount_invalid_type(client):
  with patch('room_cal.api.get_user', return_value=_AUTHED):
    r = await client.post('/workflow/discount/2026-01-15', json={'type': 'bad', 'value': 10})
  assert r.status_code == 422


@pytest.mark.asyncio
async def test_action_dispatch_unknown_action(client):
  with patch('room_cal.api.get_user', return_value=_AUTHED):
    r = await client.post('/action/nonexistent-action/2026-01-15')
  assert r.status_code == 404


@pytest.mark.asyncio
async def test_reload_clears_caches(client):
  import room_cal.cal as _cal
  cal = _cal.get_calendar()
  cal._event_cache[('fake_key',)] = []
  cal._cached_url = 'http://example.com/cal'

  with patch('room_cal.api.get_user', return_value=_AUTHED):
    r = await client.post('/reload')

  assert r.status_code == 200
  data = r.json()
  assert 'cleared_calendars' in data
  assert data['cleared_calendars'] >= 1
  assert cal._event_cache == {}
  assert cal._cached_url is None