from typing import Any
from unittest.mock import MagicMock, patch

import pytest
import requests

from infrastructure.solar.google_solar_api_client import (
    BuildingInsightsNotFoundError,
    GoogleSolarApiClient,
)


# ---------------------------------------------------------------------------
# Slice 1: Successful response returns parsed JSON
# ---------------------------------------------------------------------------


def test_get_building_insights_returns_parsed_json() -> None:
    # Arrange
    client = GoogleSolarApiClient(api_key="test-key")
    payload: dict[str, Any] = {"solarPotential": {"maxArrayPanelsCount": 20}}
    mock_response = MagicMock()
    mock_response.json.return_value = payload

    with patch("requests.get", return_value=mock_response) as mock_get:
        mock_response.raise_for_status.return_value = None

        # Act
        result = client.get_building_insights(longitude=-0.1278, latitude=51.5074)

    # Assert
    assert result == payload
    mock_get.assert_called_once()


# ---------------------------------------------------------------------------
# Slice 2: Transient HTTP errors trigger retries
# ---------------------------------------------------------------------------


def test_get_building_insights_retries_on_transient_error() -> None:
    # Arrange
    client = GoogleSolarApiClient(api_key="test-key")
    payload: dict[str, Any] = {"solarPotential": {"maxArrayPanelsCount": 20}}

    transient_error = requests.exceptions.ConnectionError("timeout")
    transient_error.response = None  # type: ignore[attr-defined]

    success_response = MagicMock()
    success_response.json.return_value = payload
    success_response.raise_for_status.return_value = None

    with patch("requests.get", side_effect=[transient_error, success_response]) as mock_get:
        with patch("time.sleep"):
            # Act
            result = client.get_building_insights(longitude=-0.1278, latitude=51.5074)

    # Assert
    assert result == payload
    assert mock_get.call_count == 2


# ---------------------------------------------------------------------------
# Slice 3: 404 + entity-not-found raises BuildingInsightsNotFoundError
# ---------------------------------------------------------------------------


def test_get_building_insights_raises_on_entity_not_found() -> None:
    # Arrange
    client = GoogleSolarApiClient(api_key="test-key")

    not_found_response = MagicMock()
    not_found_response.status_code = 404
    not_found_response.json.return_value = {
        "error": {"message": GoogleSolarApiClient.ENTITY_NOT_FOUND_ERROR}
    }

    http_error = requests.exceptions.HTTPError("404")
    http_error.response = not_found_response

    with patch("requests.get") as mock_get:
        mock_get.return_value.raise_for_status.side_effect = http_error
        mock_get.return_value.response = not_found_response

        # Act / Assert
        with pytest.raises(BuildingInsightsNotFoundError):
            client.get_building_insights(longitude=-0.1278, latitude=51.5074)

    assert mock_get.call_count == 1


# ---------------------------------------------------------------------------
# Slice 4: Retry exhaustion propagates the exception to the caller
# ---------------------------------------------------------------------------


def test_get_building_insights_propagates_exception_after_retry_exhaustion() -> None:
    # Arrange
    client = GoogleSolarApiClient(api_key="test-key")

    error = requests.exceptions.ConnectionError("persistent failure")
    error.response = None  # type: ignore[attr-defined]

    with patch("requests.get", side_effect=error) as mock_get:
        with patch("time.sleep"):
            # Act / Assert
            with pytest.raises(requests.exceptions.ConnectionError):
                client.get_building_insights(longitude=-0.1278, latitude=51.5074)

    assert mock_get.call_count == GoogleSolarApiClient.MAX_RETRIES