from datetime import date
from unittest.mock import MagicMock, patch

import pytest

from garmin.client import GarminClient


@pytest.fixture
def mock_garmin():
    with patch("garmin.client.Garmin") as mock:
        yield mock

@pytest.fixture
def mock_sso():
    with patch("garmin.client.garth_login") as mock_login, \
         patch("garmin.client.resume_login") as mock_resume_login:
        yield mock_login, mock_resume_login

@pytest.fixture(autouse=True)
def clean_client():
    """Ensure static state is clean."""
    GarminClient._temp_client_state = None
    yield
    GarminClient._temp_client_state = None

def test_client_init():
    client = GarminClient(email="test@example.com", password="password")
    assert client.email == "test@example.com"
    assert client.password == "password"

def test_login_success_force(mock_sso, mock_garmin):
    mock_login, _ = mock_sso
    mock_login.return_value = (MagicMock(), MagicMock())
    client = GarminClient(email="test@example.com", password="password")
    
    with patch("os.path.exists", return_value=False):
        assert client.login(force_login=True) == "SUCCESS"
        mock_login.assert_called_once()

def test_login_mfa_required(mock_sso):
    mock_login, _ = mock_sso
    mock_login.return_value = ("needs_mfa", {"some": "state"})
    
    client = GarminClient(email="test@example.com", password="password")
    with patch("os.path.exists", return_value=False):
        assert client.login(force_login=True) == "MFA_REQUIRED"
        assert GarminClient._temp_client_state == {"some": "state"}

def test_login_mfa_complete(mock_sso, mock_garmin):
    _, mock_resume_login = mock_sso
    mock_client = MagicMock()
    mock_client.oauth1_token = MagicMock()
    state = {"some": "state", "client": mock_client}
    GarminClient._temp_client_state = state
    
    mock_resume_login.return_value = (MagicMock(), MagicMock())
    
    client = GarminClient(email="test@example.com", password="password")
    assert client.login(mfa_code="123456") == "SUCCESS"
    mock_resume_login.assert_called_with(state, "123456")

def test_login_mfa_complete_no_client_in_state(mock_sso, mock_garmin):
    _, mock_resume_login = mock_sso
    state = {"some": "state"}
    GarminClient._temp_client_state = state
    mock_resume_login.return_value = (MagicMock(), MagicMock())
    
    client = GarminClient(email="test@example.com", password="password")
    with patch("garmin.client.garth") as mock_garth:
        assert client.login(mfa_code="123456") == "SUCCESS"
        mock_garth.client.configure.assert_called_once()

def test_login_mfa_required_no_creds(mock_garmin, monkeypatch):
    monkeypatch.setenv("GARMIN_EMAIL", "")
    monkeypatch.setenv("GARMIN_PASSWORD", "")
    client = GarminClient(email="", password="")
    GarminClient._temp_client_state = {"some": "state"}
    with patch("os.path.exists", return_value=False):
        assert client.login() == "MFA_REQUIRED"

def test_login_resume_success(mock_garmin):
    client = GarminClient(email="test@example.com", password="password")
    inst = mock_garmin.return_value
    
    with patch("os.path.exists", return_value=True), \
         patch("os.path.getsize", return_value=100):
        assert client.login() == "SUCCESS"
        inst.login.assert_called_with(tokenstore=client.token_store)

def test_login_resume_fail_falls_back(mock_garmin, mock_sso):
    mock_login, _ = mock_sso
    mock_login.return_value = (MagicMock(), MagicMock())
    
    inst = mock_garmin.return_value
    inst.login.side_effect = Exception("Resume fail")
    
    client = GarminClient(email="test", password="test")
    # Step 3 will check if creds exist. If they do, it goes to login.
    # But resume_fail_falls_back test expects FAILURE if not force_login.
    with patch("os.path.exists", return_value=True), \
         patch("os.path.getsize", return_value=100), \
         patch("os.remove"):
        assert client.login() == "FAILURE"

def test_login_resume_fail_force_retries(mock_garmin, mock_sso):
    mock_login, _ = mock_sso
    mock_login.return_value = (MagicMock(), MagicMock())
    
    inst = mock_garmin.return_value
    # First call to inst.login (resume) fails, second call (new login) succeeds
    inst.login.side_effect = [Exception("Resume fail"), None]
    
    client = GarminClient(email="test", password="test")
    with patch("os.path.exists", return_value=True), \
         patch("os.path.getsize", return_value=100), \
         patch("os.remove"):
        assert client.login(force_login=True) == "SUCCESS"
        assert mock_login.called

def test_login_empty_token_cleanup(mock_garmin):
    client = GarminClient()
    with patch("os.path.exists", return_value=True), \
         patch("os.path.getsize", return_value=0), \
         patch("os.remove") as mock_remove:
        assert client.login() == "FAILURE"
        assert mock_remove.called

def test_login_json_error_cleanup(mock_garmin):
    client = GarminClient()
    inst = mock_garmin.return_value
    inst.login.side_effect = Exception("Expecting value: line 1 column 1")
    
    with patch("os.path.exists", return_value=True), \
         patch("os.path.getsize", return_value=100), \
         patch("os.remove") as mock_remove:
        assert client.login() == "FAILURE"
        assert mock_remove.called

def test_login_missing_creds(mock_garmin, monkeypatch):
    monkeypatch.setenv("GARMIN_EMAIL", "")
    monkeypatch.setenv("GARMIN_PASSWORD", "")
    client = GarminClient(email="", password="")
    with patch("os.path.exists", return_value=False):
        assert client.login() == "FAILURE"

def test_get_activities_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_activities_by_date.side_effect = Exception("API Error")
    client = GarminClient()
    client.client = mock_instance
    assert client.get_activities(date(2023, 1, 1), date(2023, 1, 2)) == []

def test_get_stats_success(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_stats.return_value = {"steps": 1000}
    client = GarminClient()
    client.client = mock_instance
    assert client.get_stats(date(2023, 1, 1)) == {"steps": 1000}

def test_get_stats_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_stats.side_effect = Exception("Err")
    client = GarminClient()
    client.client = mock_instance
    assert client.get_stats(date(2023, 1, 1)) == {}

def test_get_user_summary_success(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_user_summary.return_value = {"calories": 2000}
    client = GarminClient()
    client.client = mock_instance
    assert client.get_user_summary(date(2023, 1, 1)) == {"calories": 2000}

def test_get_user_summary_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_user_summary.side_effect = Exception("Err")
    client = GarminClient()
    client.client = mock_instance
    assert client.get_user_summary(date(2023, 1, 1)) == {}

def test_get_workouts_list_success(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_workouts.return_value = [{"name": "W1"}]
    client = GarminClient()
    client.client = mock_instance
    assert client.get_workouts_list() == [{"name": "W1"}]

def test_get_workouts_list_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_workouts.side_effect = Exception("Err")
    client = GarminClient()
    client.client = mock_instance
    assert client.get_workouts_list() == []

def test_get_workout_detail_success(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_workout_by_id.return_value = {"id": "1"}
    client = GarminClient()
    client.client = mock_instance
    assert client.get_workout_detail("1") == {"id": "1"}

def test_get_workout_detail_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.get_workout_by_id.side_effect = Exception("Err")
    client = GarminClient()
    client.client = mock_instance
    assert client.get_workout_detail("1") == {}

def test_upload_workout_success(mock_garmin):
    mock_instance = mock_garmin.return_value
    client = GarminClient()
    client.client = mock_instance
    assert client.upload_workout({"json": True}) is True

def test_upload_workout_error(mock_garmin):
    mock_instance = mock_garmin.return_value
    mock_instance.upload_workout.side_effect = Exception("Err")
    client = GarminClient()
    client.client = mock_instance
    assert client.upload_workout({"json": True}) is False

def test_not_logged_in_errors():
    client = GarminClient()
    with pytest.raises(RuntimeError):
        client.get_activities(date.today(), date.today())
    with pytest.raises(RuntimeError):
        client.get_stats(date.today())
    with pytest.raises(RuntimeError):
        client.get_user_summary(date.today())
    with pytest.raises(RuntimeError):
        client.get_workouts_list()
    with pytest.raises(RuntimeError):
        client.get_workout_detail("1")
    with pytest.raises(RuntimeError):
        client.upload_workout({})