import pytest

from app.broadcast_areas.models import CustomBroadcastAreas
from app.models.broadcast_message import BroadcastMessage
from tests import broadcast_message_json


@pytest.mark.parametrize('areas, expected_area_ids', [
    ({'simple_polygons': []}, []),
    ({'ids': ['123'], 'simple_polygons': []}, ['123'])
])
def test_area_ids(
    areas,
    expected_area_ids,
):
    broadcast_message = BroadcastMessage(broadcast_message_json(
        areas=areas
    ))

    assert broadcast_message.area_ids == expected_area_ids


def test_simple_polygons():
    broadcast_message = BroadcastMessage(broadcast_message_json(
        area_ids=[
            # Hackney Central
            'wd20-E05009372',
            # Hackney Wick
            'wd20-E05009374',
        ],
    ))

    assert [
        [
            len(polygon)
            for polygon in broadcast_message.polygons.as_coordinate_pairs_lat_long
        ],
        [
            len(polygon)
            for polygon in broadcast_message.simple_polygons.as_coordinate_pairs_lat_long
        ],
    ] == [
        # One polygon for each area
        [27, 31],
        # Because the areas are close to each other, the simplification
        # and unioning process results in a single polygon with fewer
        # total coordinates
        [57],
    ]


def test_content_comes_from_attribute_not_template():
    broadcast_message = BroadcastMessage(broadcast_message_json())
    assert broadcast_message.content == 'This is a test'


@pytest.mark.parametrize(('areas', 'expected_length'), [
    ({'ids': []}, 0),
    ({'ids': ['wd20-E05009372']}, 1),
    ({'no data': 'just created'}, 0),
    ({'names': ['somewhere'], 'simple_polygons': [[[3.5, 1.5]]]}, 1)
])
def test_areas(
    areas,
    expected_length
):
    broadcast_message = BroadcastMessage(broadcast_message_json(
        areas=areas
    ))

    assert len(list(broadcast_message.areas)) == expected_length


def test_areas_treats_missing_ids_as_custom_broadcast(notify_admin):
    broadcast_message = BroadcastMessage(broadcast_message_json(
        areas={
            'ids': [
                'wd20-E05009372',
                'something else',
            ],
            # although the IDs may no longer be usable, we can
            # expect the broadcast to have names and polygons,
            # which is enough to show the user something
            'names': [
                'wd20 name',
                'something else name'
            ],
            'simple_polygons': [[[1, 2]]]
        }
    ))

    assert len(list(broadcast_message.areas)) == 2
    assert type(broadcast_message.areas) == CustomBroadcastAreas


@pytest.mark.parametrize('area_ids, approx_bounds', (
    ([
        'ctry19-N92000002',  # Northern Ireland (UTM zone 29N)
        'ctry19-W92000004',  # Wales (UTM zone 30N)
    ], [
        -8.2, 51.5, -2.1, 55.1
    ]),
    ([
        'lad20-E06000031',  # Peterborough (UTM zone 30N)
        'lad20-E07000146',  # Kings Lyn and West Norfolk (UTM zone 31N)
    ], [
        -0.5, 52.5, 0.8, 53.0
    ]),
    ([
        'wd20-E05009372',  # Hackney Central (UTM zone 30N)
        'wd20-E05009374',  # Hackney Wick (UTM zone 30N)
    ], [
        -0.1, 51.5, -0.0, 51.6
    ]),
    ([
        'wd20-E05009372',  # Hackney Central (UTM zone 30N)
        'test-santa-claus-village-rovaniemi-a',  # (UTM zone 35N)
    ], [
        -0.1, 51.5, 25.9, 66.6
    ]),
))
def test_combining_multiple_areas_keeps_same_bounds(area_ids, approx_bounds):
    broadcast_message = BroadcastMessage(broadcast_message_json(
        areas={'ids': area_ids}
    ))

    assert [
        round(coordinate, 1) for coordinate in broadcast_message.polygons.bounds
    ] == [
        round(coordinate, 1) for coordinate in broadcast_message.simple_polygons.bounds
    ] == (
        approx_bounds
    )