from appsettings.models import AppSettings
from appsettings.settings import app_settings
from computes.models import Compute
from django.conf import settings
from django.contrib.auth import get_user_model
from django.contrib.auth.models import Permission
from django.shortcuts import reverse
from django.test import Client, RequestFactory, TestCase
from instances.models import Instance


from accounts.forms import UserInstanceForm, UserSSHKeyForm
from accounts.models import UserInstance, UserSSHKey
from accounts.utils import validate_ssh_key


class AccountsTestCase(TestCase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()

        # Add users for testing purposes
        User = get_user_model()
        cls.admin_user = User.objects.get(pk=1)
        cls.test_user = User.objects.create_user(username="test", password="test")

        # Add compute
        cls.compute = Compute.objects.create(
            name="accounts-test-compute",
            hostname="localhost",
            login="",
            password="",
            details="local",
            type=4,
        )
        cls.instance = Instance.objects.create(
            compute=cls.compute,
            name="test-vm",
        )

    @classmethod
    def tearDownClass(cls):
        if getattr(cls, "instance", None):
            cls.instance.delete()
        if getattr(cls, "compute", None):
            cls.compute.delete()
        super().tearDownClass()

    def setUp(self):
        self.client.login(request=RequestFactory().get("/"), username="admin", password="admin")
        permission = Permission.objects.get(codename="change_password")
        self.test_user.user_permissions.add(permission)
        self.rsa_key = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgQC6OOdbfv27QVnSC6sKxGaHb6YFc+3gxCkyVR3cTSXE/n5BEGf8aOgBpepULWa1RZfxYHY14PlKULDygdXSdrrR2kNSwoKz/Oo4d+3EE92L7ocl1+djZbptzgWgtw1OseLwbFik+iKlIdqPsH+IUQvX7yV545ZQtAP8Qj1R+uCqkw== test@test"
        self.ecdsa_key = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBJc5xpT3R0iFJYNZbmWgAiDlHquX/BcV1kVTsnBfiMsZgU3lGaqz2eb7IBcir/dxGnsVENTTmPQ6sNcxLxT9kkQ= realgecko@archlinux"

    def test_profile(self):
        response = self.client.get(reverse("accounts:profile"))
        self.assertEqual(response.status_code, 200)

        response = self.client.get(
            reverse("accounts:account", args=[self.test_user.id])
        )
        self.assertEqual(response.status_code, 200)

    def test_account_with_otp(self):
        settings.OTP_ENABLED = True
        response = self.client.get(
            reverse("accounts:account", args=[self.test_user.id])
        )
        self.assertEqual(response.status_code, 200)

    def test_login_logout(self):
        client = Client()

        response = client.post(
            reverse("accounts:login"), {"username": "test", "password": "test"}
        )
        self.assertRedirects(response, settings.LOGIN_REDIRECT_URL)

        response = client.post(reverse("accounts:logout"))
        self.assertRedirects(response, reverse("accounts:login"))

    def test_a_signed_in_user_is_sent_on_from_the_login_page(self):
        self.client.force_login(self.test_user)
        login = reverse("accounts:login")
        response = self.client.get(f"{login}?next={reverse('computes')}")
        self.assertRedirects(response, reverse("computes"), fetch_redirect_response=False)
        response = self.client.get(f"{login}?next=https://example.com/")
        self.assertRedirects(response, settings.LOGIN_REDIRECT_URL, fetch_redirect_response=False)

    def test_change_password(self):
        self.client.force_login(self.test_user)

        response = self.client.get(reverse("accounts:change_password"))
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:change_password"),
            {
                "old_password": "wrongpass",
                "new_password1": "newpw",
                "new_password2": "newpw",
            },
        )
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:change_password"),
            {
                "old_password": "test",
                "new_password1": "newpw",
                "new_password2": "newpw",
            },
        )
        self.assertRedirects(response, reverse("accounts:profile"))

        self.client.logout()

        logged_in = self.client.login(request=RequestFactory().get("/"), username="test", password="newpw")
        self.assertTrue(logged_in)

    def test_user_instance_create_update_delete(self):
        # create
        response = self.client.get(
            reverse("accounts:user_instance_create", args=[self.test_user.id])
        )
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:user_instance_create", args=[self.test_user.id]),
            {
                "user": self.test_user.id,
                "instance": self.instance.id,
                "is_change": False,
                "is_delete": False,
                "is_vnc": False,
            },
        )
        self.assertRedirects(
            response, reverse("accounts:account", args=[self.test_user.id])
        )

        user_instance: UserInstance = UserInstance.objects.get(
            user=self.test_user, instance=self.instance
        )
        self.assertEqual(user_instance.user, self.test_user)
        self.assertEqual(user_instance.instance, self.instance)
        self.assertEqual(user_instance.is_change, False)
        self.assertEqual(user_instance.is_delete, False)
        self.assertEqual(user_instance.is_vnc, False)

        # update
        response = self.client.get(
            reverse("accounts:user_instance_update", args=[user_instance.id])
        )
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:user_instance_update", args=[user_instance.id]),
            {
                "user": self.test_user.id,
                "instance": self.instance.id,
                "is_change": True,
                "is_delete": True,
                "is_vnc": True,
            },
        )
        self.assertRedirects(
            response, reverse("accounts:account", args=[self.test_user.id])
        )

        user_instance = UserInstance.objects.get(
            user=self.test_user, instance=self.instance
        )
        self.assertEqual(user_instance.user, self.test_user)
        self.assertEqual(user_instance.instance, self.instance)
        self.assertEqual(user_instance.is_change, True)
        self.assertEqual(user_instance.is_delete, True)
        self.assertEqual(user_instance.is_vnc, True)

        # delete
        response = self.client.get(
            reverse("accounts:user_instance_delete", args=[user_instance.id])
        )
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:user_instance_delete", args=[user_instance.id])
        )
        self.assertRedirects(
            response, reverse("accounts:account", args=[self.test_user.id])
        )

        # test 'next' redirect during deletion
        user_instance = UserInstance.objects.create(
            user=self.test_user, instance=self.instance
        )
        response = self.client.post(
            reverse("accounts:user_instance_delete", args=[user_instance.id])
            + "?next="
            + reverse("index")
        )
        self.assertRedirects(response, reverse("index"))

    def test_update_user_profile(self):
        self.client.force_login(self.test_user)

        user = get_user_model().objects.get(username="test")
        self.assertEqual(user.first_name, "")
        self.assertEqual(user.last_name, "")
        self.assertEqual(user.email, "")

        response = self.client.post(
            reverse("accounts:profile"),
            {
                "first_name": "first name",
                "last_name": "last name",
                "email": "email@mail.mail",
            },
        )
        self.assertRedirects(response, reverse("accounts:profile"))

        user = get_user_model().objects.get(username="test")
        self.assertEqual(user.first_name, "first name")
        self.assertEqual(user.last_name, "last name")
        self.assertEqual(user.email, "email@mail.mail")

    def test_create_delete_ssh_key(self):
        response = self.client.get(reverse("accounts:ssh_key_create"))
        self.assertEqual(response.status_code, 200)

        response = self.client.post(
            reverse("accounts:ssh_key_create"),
            {
                "keyname": "keyname",
                "keypublic": self.rsa_key,
            },
        )
        self.assertRedirects(response, reverse("accounts:profile") + "#sshkeys")

        key = UserSSHKey.objects.get(keyname="keyname")
        self.assertEqual(key.keyname, "keyname")
        self.assertEqual(key.keypublic, self.rsa_key)

        response = self.client.get(reverse("accounts:ssh_key_delete", args=[key.id]))
        self.assertEqual(response.status_code, 200)

        response = self.client.post(reverse("accounts:ssh_key_delete", args=[key.id]))
        self.assertRedirects(response, reverse("accounts:profile") + "#sshkeys")

    def test_the_profile_lists_keys_and_tokens_where_links_land(self):
        admin = get_user_model().objects.get(username="admin")
        key = UserSSHKey.objects.create(user=admin, keyname="laptop", keypublic=self.rsa_key)
        response = self.client.get(reverse("accounts:profile"))
        # other pages link to #sshkeys and #apitokens
        self.assertContains(response, 'id="sshkeys"')
        self.assertContains(response, 'id="apitokens"')
        self.assertContains(response, f'href="{reverse("accounts:ssh_key_delete", args=[key.id])}"')
        self.assertContains(response, f'href="{reverse("accounts:change_password")}"')
        # an LDAP user's password is changed in LDAP
        admin.set_unusable_password()
        admin.save()
        self.client.force_login(admin)
        self.assertNotContains(self.client.get(reverse("accounts:profile")), f'href="{reverse("accounts:change_password")}"')

    def test_validate_ssh_key(self):
        self.assertFalse(validate_ssh_key(""))
        self.assertFalse(validate_ssh_key("ssh-rsa ABBA test@test"))
        self.assertFalse(validate_ssh_key("ssh-rsa AAAABwdzZGY= test@test"))
        self.assertFalse(validate_ssh_key("ssh-rsa AAA test@test"))
        # validate ecdsa key
        self.assertTrue(validate_ssh_key(self.ecdsa_key))

    def test_forms(self):
        # raise available validation errors for maximum coverage
        form = UserSSHKeyForm(
            {"keyname": "keyname", "keypublic": self.rsa_key}, user=self.test_user
        )
        form.save()

        form = UserSSHKeyForm(
            {"keyname": "keyname", "keypublic": self.rsa_key}, user=self.test_user
        )
        self.assertFalse(form.is_valid())

        form = UserSSHKeyForm(
            {"keyname": "keyname", "keypublic": "invalid key"}, user=self.test_user
        )
        self.assertFalse(form.is_valid())

        app_settings.ALLOW_INSTANCE_MULTIPLE_OWNER = "False"
        form = UserInstanceForm(
            {
                "user": self.admin_user.id,
                "instance": self.instance.id,
                "is_change": False,
                "is_delete": False,
                "is_vnc": False,
            }
        )
        form.save()
        form = UserInstanceForm(
            {
                "user": self.test_user.id,
                "instance": self.instance.id,
                "is_change": False,
                "is_delete": False,
                "is_vnc": False,
            }
        )
        self.assertFalse(form.is_valid())


class SingleOwnerEditTests(TestCase):
    """With one owner per VM, the owner's own rights can still be changed."""

    def test_the_only_owner_is_edited(self):
        AppSettings.objects.filter(key="ALLOW_INSTANCE_MULTIPLE_OWNER").update(value="False")
        admin = get_user_model().objects.create_superuser("audit-admin", "audit@example.com", "pw")
        bob = get_user_model().objects.create_user("bob")
        compute = Compute.objects.create(name="c1", hostname="127.0.0.1", login="", password="", type=4)
        vm = Instance.objects.create(compute=compute, name="vm", uuid="99999999-9999-9999-9999-999999999999")
        ui = UserInstance.objects.create(user=bob, instance=vm)
        self.client.force_login(admin)
        response = self.client.post(reverse("accounts:user_instance_update", args=[ui.pk]), {"is_vnc": "on"})
        self.assertRedirects(response, reverse("accounts:account", args=[bob.pk]), fetch_redirect_response=False)
        ui.refresh_from_db()
        self.assertTrue(ui.is_vnc)


class OwnerRightsReturnTestCase(TestCase):
    """Edit rights on a VM's Users tab comes back to that tab; a page of
    another site does not count."""

    def test_an_owner_s_rights_come_back_to_the_vm_page(self):
        admin = get_user_model().objects.create_superuser("rights-admin", "rights@example.com", "x")
        owner = get_user_model().objects.create_user("rights-owner")
        compute = Compute.objects.create(name="rights", hostname="192.0.2.30", login="u", password="p", type=1)
        vm = Instance.objects.create(compute=compute, name="rights-vm", uuid="12121212-0000-0000-0000-000000000000")
        user_instance = UserInstance.objects.create(user=owner, instance=vm)
        self.client.force_login(admin)
        update = reverse("accounts:user_instance_update", args=[user_instance.id])
        for next_url, back in ((f"/instances/{vm.id}/%23users", f"/instances/{vm.id}/#users"),
                               ("https://example.com/", reverse("accounts:account", args=[owner.id]))):
            with self.subTest(next_url):
                response = self.client.post(f"{update}?next={next_url}", {"is_change": True})
                self.assertRedirects(response, back, fetch_redirect_response=False)