from django.core.management import call_command
from assets import models
from django.test.utils import override_settings
from django.urls import reverse
from urllib.parse import urlparse
from assets import models, urls
from reversion import revisions as reversion
import datetime
from django.utils import timezone
from django.test import tag
import pytest
from pytest_django.asserts import assertFormError, assertRedirects

pytestmark = pytest.mark.django_db  # TODO


def response_contains(response, needle):
    return needle in str(response.content)


def login(client, django_user_model):
    pwd = 'testuser'
    usr = "TestUser"
    profile = django_user_model.objects.create_user(username=usr, email="TestUser@test.com", password=pwd, is_superuser=True, is_active=True, is_staff=True)
    assert client.login(username=usr, password=pwd)


def create_test_asset():
    working = models.AssetStatus.objects.create(name="Working", should_show=True)
    lighting = models.AssetCategory.objects.create(name="Lighting")
    asset = models.Asset.objects.create(asset_id="1991", description="Spaceflower", status=working, category=lighting, date_acquired=datetime.date(1991, 12, 26))
    return asset


def create_test_cable():
    category = models.AssetCategory.objects.create(name="Sound")
    status = models.AssetStatus.objects.create(name="Broken", should_show=True)
    connector = models.Connector.objects.create(description="16A IEC", current_rating=16, voltage_rating=240, num_pins=3)
    cable_type = models.CableType.objects.create(circuits=11, cores=3, plug=connector, socket=connector)
    return models.Asset.objects.create(asset_id="666", description="125A -> Jack", comments="The cable from Hell...", status=status, category=category, date_acquired=datetime.date(2006, 6, 6), is_cable=True, cable_type=cable_type, length=10, csa="1.5")


def test_supplier_create(client, django_user_model):
    login(client, django_user_model)
    url = reverse('supplier_create')
    response = client.post(url)
    assertFormError(response, 'form', 'name', 'This field is required.')


def test_supplier_edit(client, django_user_model):
    login(client, django_user_model)
    supplier = models.Supplier.objects.create(name="Gadgetron Corporation")
    url = reverse('supplier_update', kwargs={'pk': supplier.pk})
    response = client.post(url, {'name': ""})
    assertFormError(response, 'form', 'name', 'This field is required.')


def test_404(client, django_user_model):
    login(client, django_user_model)
    urls = {'asset_detail', 'asset_update', 'asset_duplicate', 'supplier_detail', 'supplier_update'}
    for url_name in urls:
        request_url = reverse(url_name, kwargs={'pk': "0000"})
        response = client.get(request_url, follow=True)
        assert response.status_code == 404


def test_embed_login_redirect(client, django_user_model):
    request_url = reverse('asset_embed', kwargs={'pk': create_test_asset().asset_id})
    expected_url = "{0}?next={1}".format(reverse('login_embed'), request_url)

    # Request the page and check it redirects
    response = client.get(request_url, follow=True)
    assertRedirects(response, expected_url, status_code=302, target_status_code=200)

    # Now login
    login(client, django_user_model)

    # And check that it no longer redirects
    response = client.get(request_url, follow=True)
    assert len(response.redirect_chain) == 0


def test_login_cookie_warning(client, django_user_model):
    login_url = reverse('login_embed')
    response = client.post(login_url, follow=True)
    assert "Cookies do not seem to be enabled" in str(response.content)


def test_x_frame_headers(client, django_user_model):
    asset_url = reverse('asset_embed', kwargs={'pk': create_test_asset().asset_id})
    login_url = reverse('login_embed')

    login(client, django_user_model)

    response = client.get(asset_url, follow=True)
    with pytest.raises(KeyError):
        response._headers["X-Frame-Options"]

    response = client.get(login_url, follow=True)
    with pytest.raises(KeyError):
        response._headers["X-Frame-Options"]


def test_oembed(client):
    asset = create_test_asset()
    asset_url = reverse('asset_detail', kwargs={'pk': asset.asset_id})
    asset_embed_url = reverse('asset_embed', kwargs={'pk': asset.asset_id})
    oembed_url = reverse('asset_oembed', kwargs={'pk': asset.asset_id})

    alt_oembed_url = reverse('asset_oembed', kwargs={'pk': 999})
    alt_asset_embed_url = reverse('asset_embed', kwargs={'pk': 999})

    # Test the meta tag is in place
    response = client.get(asset_url, follow=True, HTTP_HOST='example.com')
    assert '<link rel="alternate" type="application/json+oembed"' in str(response.content)
    assert oembed_url in str(response.content)

    # Test that the JSON exists
    response = client.get(oembed_url, follow=True, HTTP_HOST='example.com')
    assert response.status_code == 200
    assert asset_embed_url in str(response.content)

    # Should also work for non-existant
    response = client.get(alt_oembed_url, follow=True, HTTP_HOST='example.com')
    assert response.status_code == 200
    assert alt_asset_embed_url in str(response.content)


@override_settings(DEBUG=True)
def test_generate_sample_data(client):
    # Run the management command and check there are no exceptions
    call_command('generateSampleAssetsData')

    # Check there are lots
    assert models.Asset.objects.all().count() > 50
    assert models.Supplier.objects.all().count() > 50


@override_settings(DEBUG=True)
def test_delete_sample_data(client):
    call_command('deleteSampleData')

    assert models.Asset.objects.all().count() == 0
    assert models.Supplier.objects.all().count() == 0


def test_production_exception(client):
    from django.core.management.base import CommandError

    with pytest.raises(CommandError, match=".*production"):
        call_command('generateSampleAssetsData')
        call_command('deleteSampleData')


def test_asset_create(client, django_user_model):
    login(client, django_user_model)
    response = client.post(reverse('asset_create'), {'date_sold': '2000-01-01', 'date_acquired': '2020-01-01', 'purchase_price': '-30', 'salvage_value': '-30'})
    assertFormError(response, 'form', 'asset_id', 'This field is required.')
    assertFormError(response, 'form', 'description', 'This field is required.')
    assertFormError(response, 'form', 'status', 'This field is required.')
    assertFormError(response, 'form', 'category', 'This field is required.')

    assertFormError(response, 'form', 'date_sold', 'Cannot sell an item before it is acquired')
    assertFormError(response, 'form', 'purchase_price', 'A price cannot be negative')
    assertFormError(response, 'form', 'salvage_value', 'A price cannot be negative')


def test_cable_create(client, django_user_model):
    login(client, django_user_model)
    response = client.post(reverse('asset_create'), {'asset_id': 'X$%A', 'is_cable': True})
    assertFormError(response, 'form', 'asset_id', 'An Asset ID can only consist of letters and numbers, with a final number')

    assertFormError(response, 'form', 'cable_type', 'A cable must have a type')
    assertFormError(response, 'form', 'length', 'The length of a cable must be more than 0')
    assertFormError(response, 'form', 'csa', 'The CSA of a cable must be more than 0')

# Given that validation is done at model level it *shouldn't* need retesting...gonna do it anyway!


def test_asset_edit(client, django_user_model):
    login(client, django_user_model)
    url = reverse('asset_update', kwargs={'pk': create_test_asset().asset_id})
    response = client.post(url, {'date_sold': '2000-12-01', 'date_acquired': '2020-12-01', 'purchase_price': '-50', 'salvage_value': '-50', 'description': "", 'status': "", 'category': ""})
    # assertFormError(response, 'form', 'asset_id', 'This field is required.')
    assertFormError(response, 'form', 'description', 'This field is required.')
    assertFormError(response, 'form', 'status', 'This field is required.')
    assertFormError(response, 'form', 'category', 'This field is required.')
    assertFormError(response, 'form', 'date_sold', 'Cannot sell an item before it is acquired')
    assertFormError(response, 'form', 'purchase_price', 'A price cannot be negative')
    assertFormError(response, 'form', 'salvage_value', 'A price cannot be negative')


def test_cable_edit(client, django_user_model):
    login(client, django_user_model)
    url = reverse('asset_update', kwargs={'pk': create_test_cable().asset_id})
    # TODO Why do I have to send is_cable=True here?
    response = client.post(url, {'is_cable': True, 'length': -3, 'csa': -3})

    # TODO Can't figure out how to select the 'none' option...
    # assertFormError(response, 'form', 'cable_type', 'A cable must have a type')
    assertFormError(response, 'form', 'length', 'The length of a cable must be more than 0')
    assertFormError(response, 'form', 'csa', 'The CSA of a cable must be more than 0')


def test_asset_duplicate(client, django_user_model):
    login(client, django_user_model)
    url = reverse('asset_duplicate', kwargs={'pk': create_test_cable().asset_id})
    response = client.post(url, {'is_cable': True, 'length': 0, 'csa': 0})

    assertFormError(response, 'form', 'length', 'The length of a cable must be more than 0')
    assertFormError(response, 'form', 'csa', 'The CSA of a cable must be more than 0')


@override_settings(DEBUG=True)
def create_asset_one():
    # Shortcut to create the levels - bonus side effect of testing the command (hopefully) matches production
    call_command('generateSampleData')
    # Create an asset with ID 1 to make things easier in loops (we can always use pk=1)
    category = models.AssetCategory.objects.create(name="Number One")
    status = models.AssetStatus.objects.create(name="Probably Fine", should_show=True)
    return models.Asset.objects.create(asset_id="1", description="Half Price Fish", status=status, category=category, date_acquired=datetime.date(2020, 2, 1))

# Nothing should be available to the unauthenticated


def test_unauthenticated(client):
    for url in filter(lambda url: url.name is not None and "json" not in str(url), urls.urlpatterns):
        pattern = str(url.pattern)
        request_url = ""
        if ":pk>" in pattern:
            request_url = reverse(url.name, kwargs={'pk': 1})
        else:
            request_url = reverse(url.name)
        if request_url:
            response = client.get(request_url, follow=True, HTTP_HOST='example.com')
            # TODO Check the URL here
            assert response_contains(response, 'Login')


def test_basic_access(client):
    create_asset_one()
    client.login(username="basic", password="basic")

    url = reverse('asset_list')
    response = client.get(url)
    # Check edit and duplicate buttons NOT shown in list
    assert not response_contains(response, 'Edit')
    assert not response_contains(response, 'Duplicate')

    url = reverse('asset_detail', kwargs={'pk': "9000"})
    response = client.get(url)
    assert not response_contains(response, 'Purchase Details')
    assert not response_contains(response, 'View Revision History')

    urls = {'asset_history', 'asset_update', 'asset_duplicate'}
    for url_name in urls:
        request_url = reverse(url_name, kwargs={'pk': "9000"})
        response = client.get(request_url, follow=True)
        assert response.status_code == 403

    request_url = reverse('supplier_create')
    response = client.get(request_url, follow=True)
    assert response.status_code == 403

    request_url = reverse('supplier_update', kwargs={'pk': "1"})
    response = client.get(request_url, follow=True)
    assert response.status_code == 403


def test_keyholder_access(client):
    create_asset_one()
    client.login(username="keyholder", password="keyholder")

    url = reverse('asset_list')
    response = client.get(url)
    # Check edit and duplicate buttons shown in list
    assert response_contains(response, 'Edit')
    assert response_contains(response, 'Duplicate')

    url = reverse('asset_detail', kwargs={'pk': "9000"})
    response = client.get(url)
    assert response_contains(response, 'Purchase Details')
    assert response_contains(response, 'View Revision History')


def test_page_titles(admin_client):
    for url in filter(lambda url: url.name is not None and not any(s in url.name for s in ["json", "embed"]), urls.urlpatterns):
        request_url = ""
        if ":pk>" in str(url.pattern):
            request_url = reverse(url.name, kwargs={'pk': "1"})
        else:
            request_url = reverse(url.name)
        response = admin_client.get(request_url)
        if hasattr(response, "context_data") and "page_title" in response.context_data:
            expected_title = response.context_data["page_title"]
            assert response_contains(response, '<title>{} | Rig Information Gathering System</title>'.format(expected_title))