import pytest
from etl.epc.Record import EPCRecord
from backend.Property import Property
from recommendations.LightingRecommendations import LightingRecommendations

from recommendations.tests.test_data.materials import materials


class TestLightingRecommendations:

    def test_init_invalid_materials(self):
        epc_record = EPCRecord()
        epc_record.prepared_epc = {"county": "Greater London Authority"}
        input_property0 = Property(id=1, postcode="F4k3 6", address="623 fake street", epc_record=epc_record)
        input_property0.lighting = {"low_energy_proportion": 0}
        # Test for invalid materials
        with pytest.raises(ValueError):
            LightingRecommendations(input_property0, [])

    def test_recommend_no_action_needed(self):
        # Case where no recommendation is needed
        epc_record = EPCRecord()
        epc_record.prepared_epc = {"county": "Greater London Authority"}
        input_property1 = Property(id=1, postcode="F4k3 6", address="623 fake street", epc_record=epc_record)
        input_property1.lighting = {"low_energy_proportion": 100}

        lr = LightingRecommendations(input_property1, materials)
        lr.recommend()
        assert lr.recommendation == []

    def test_recommend_action_needed(self):
        # Case where recommendation is needed
        epc_record = EPCRecord()
        epc_record.prepared_epc = {"county": "Greater London Authority"}
        input_property1 = Property(id=1, postcode="F4k3 6", address="623 fake street", epc_record=epc_record)
        input_property1.lighting = {"low_energy_proportion": 0.80}
        input_property1.number_lighting_outlets = 20

        lr = LightingRecommendations(input_property1, materials)
        lr.recommend()
        assert len(lr.recommendation) == 1

        # Note - this test may be dependent on the ofgem price caps
        assert lr.recommendation == [
            {'phase': 0, 'parts': [], 'type': 'low_energy_lighting', 'measure_type': 'low_energy_lighting',
             'description': 'Install low energy lighting in 4 outlets', 'starting_u_value': None, 'new_u_value': None,
             'already_installed': False, 'sap_points': 0.4, 'kwh_savings': 219.0,
             'energy_cost_savings': 56.348699999999994, 'co2_equivalent_savings': 0.035478,
             'description_simulation': {'lighting-energy-eff': 'Very Good',
                                        'lighting-description': 'Low energy lighting in all fixed outlets',
                                        'low-energy-lighting': 100}, 'total': 188.76000000000002, 'subtotal': 157.3,
             'vat': 31.460000000000004, 'contingency': 14.3, 'material': 80.0, 'labour_hours': 3.2, 'labour_days': 0.4,
             'labour_cost': 63.0, 'survey': False}]