"""The HypervisorDriver provisioning methods, around the live import (#307)."""

from __future__ import annotations

import io
from unittest.mock import MagicMock, patch

import pycdlib
import pytest
import yaml

from napalm_vmware import VmwareEsxiDriver
from napalm_vmware import provisioning as prov
from napalm_vmware.provision.placement import Placement
from tests.conftest import FakeInventory

PLACE = Placement(
    host="ha-host",
    host_name="esx01",
    datastore="datastore-1",
    datastore_name="LocalDS_0",
    resource_pool="ha-root-pool",
    folder="ha-folder-vm",
    datacenter_name="ha-datacenter",
    networks=["HaNetwork-VM Network"],
)


@pytest.fixture
def driver(esxi_data):
    d = VmwareEsxiDriver("esx01", "root", "secret", optional_args={"image_cache_dir": "/tmp/x"})
    d._si = MagicMock()
    d._inventory = FakeInventory(esxi_data)
    d.mo = MagicMock(name="mo")
    d._mo = MagicMock(return_value=d.mo)
    return d


class TestTargets:
    def test_image_storages(self, driver):
        (ds,) = driver.get_image_storages()
        assert ds["name"] == "LocalDS_0"
        assert ds["available_gb"] <= ds["total_gb"]

    def test_inaccessible_datastore_is_not_offered(self, driver, esxi_data):
        esxi_data["objects"]["Datastore"][0]["summary"]["accessible"] = False
        assert driver.get_image_storages() == []

    def test_network_targets_are_port_groups_with_a_fixed_vlan(self, driver, esxi_host):
        esxi_host["config.network.portgroup"][0]["spec"]["vlanId"] = 30
        targets = {t["name"]: t for t in driver.get_network_targets()}
        assert targets["VM Network"] == {
            "name": "VM Network",
            "kind": "portgroup",
            "vlan_aware": False,
            "fixed_vlan_tag": 30,
        }
        assert targets["Management Network"]["fixed_vlan_tag"] is None


class TestCheckNics:
    @pytest.mark.parametrize(
        ("nics", "message"),
        [
            ([], "at least one"),
            ([{"bridge": "Nope"}], "no port group"),
            ([{"bridge": "VM Network", "trunk_vlan_tags": [10, 20]}], "trunk"),
            ([{"bridge": "VM Network", "vlan_tag": 40}], "carries VLAN"),
        ],
    )
    def test_refusals(self, driver, nics, message):
        with pytest.raises(RuntimeError, match=message):
            driver._check_nics(nics)

    def test_matching_vlan_is_fine(self, driver, esxi_host):
        esxi_host["config.network.portgroup"][0]["spec"]["vlanId"] = 40
        driver._check_nics([{"bridge": "VM Network", "vlan_tag": 40}])


def _create(driver, **overrides):
    kwargs = dict(
        image_url="https://img/debian.qcow2",
        cpu=2,
        memory=2048,
        nics=[{"bridge": "VM Network", "dhcp": True}],
        cloud_init_config={"hostname": "web01"},
    )
    kwargs.update(overrides)
    return driver.create_vm_from_cloud_init("web01", **kwargs)


@pytest.fixture
def staged(driver):
    """Everything around the live import replaced; returns the mocks."""
    cache = MagicMock()
    cache.return_value.vmdk.return_value = ("/tmp/x/a.vmdk", 2 * 1024**3)
    with (
        patch.object(prov, "ImageCache", cache),
        patch.object(prov, "choose_placement", return_value=PLACE),
        patch.object(driver, "_placement_inventory"),
        patch.object(driver, "_import_ovf", return_value="vm-99") as import_ovf,
        patch.object(driver, "_finish_vm") as finish,
        patch.object(driver, "_run_task") as run_task,
        patch.object(driver, "_discard") as discard,
    ):
        driver._inventory.properties = MagicMock(return_value={"config.instanceUuid": "uuid-99"})
        yield MagicMock(
            cache=cache, import_ovf=import_ovf, finish=finish, run_task=run_task, discard=discard
        )


class TestCreate:
    def test_result_names_vm_and_host(self, driver, staged):
        assert _create(driver) == {"vmid": "uuid-99", "name": "web01", "node": "esx01"}

    def test_image_cache_is_used_with_the_download_timeout(self, driver, staged):
        _create(driver, image_checksum="sha256:ab", download_timeout=42)
        staged.cache.return_value.vmdk.assert_called_once_with(
            "https://img/debian.qcow2", "sha256:ab", 42
        )

    def test_descriptor_describes_the_request(self, driver, staged):
        _create(driver, nics=[{"bridge": "VM Network"}, {"bridge": "Management Network"}])
        descriptor = staged.import_ovf.call_args.args[1]
        assert "<rasd:VirtualQuantity>2048</rasd:VirtualQuantity>" in descriptor
        assert descriptor.count("<rasd:ResourceType>10</rasd:ResourceType>") == 2

    def test_ssh_keys_reach_the_user_data(self, driver, staged):
        _create(driver, ssh_public_keys=["ssh-ed25519 AAA k"])
        user = staged.finish.call_args.args[4]
        assert yaml.safe_load(user)["ssh_authorized_keys"] == ["ssh-ed25519 AAA k"]

    def test_powered_on_last(self, driver, staged):
        _create(driver)
        driver.mo.PowerOnVM_Task.assert_not_called()  # handed to _run_task, not called
        assert staged.run_task.call_args.args[0] is driver.mo.PowerOnVM_Task

    def test_failure_after_import_removes_the_vm(self, driver, staged):
        staged.finish.side_effect = OSError("upload refused")
        with pytest.raises(RuntimeError, match="upload refused"):
            _create(driver)
        staged.discard.assert_called_once_with("vm-99")

    def test_no_cpu_type_is_the_normal_case(self, driver, staged):
        assert _create(driver, cpu_type=None)["vmid"] == "uuid-99"

    def test_a_cpu_type_is_refused_before_anything_happens(self, driver, staged):
        """VMware sets CPU compatibility per cluster (EVC), not per VM, so a
        requested model cannot be honoured -- and is not silently dropped."""
        with pytest.raises(ValueError, match="CPU type"):
            _create(driver, cpu_type="host")
        staged.cache.return_value.vmdk.assert_not_called()
        staged.import_ovf.assert_not_called()

    def test_placement_refusal_is_a_runtime_error(self, driver, staged):
        with patch.object(prov, "choose_placement", side_effect=ValueError("no host")):
            with pytest.raises(RuntimeError, match="no host"):
                _create(driver)
        staged.import_ovf.assert_not_called()


MAC = "00:0c:29:39:31:62"


def _live_devices():
    """What vSphere hands back: full device objects, backings included."""
    from pyVmomi import vim

    disk = vim.vm.device.VirtualDisk(
        key=2000,
        controllerKey=1000,
        unitNumber=0,
        capacityInKB=2 * 1024 * 1024,
        backing=vim.vm.device.VirtualDisk.FlatVer2BackingInfo(
            fileName="[LocalDS_0] web01/disk.vmdk", diskMode="persistent"
        ),
        deviceInfo=vim.Description(label="Hard disk 1", summary=""),
    )
    nic = vim.vm.device.VirtualVmxnet3(
        key=4000,
        macAddress=MAC,
        addressType="generated",
        backing=vim.vm.device.VirtualEthernetCard.NetworkBackingInfo(deviceName="VM Network"),
        deviceInfo=vim.Description(label="Network adapter 1", summary=""),
    )
    return [disk, nic]


class TestFinishVm:
    def _finish(self, driver, esxi_data, nics, disk_gb=None):
        driver._inventory.properties = MagicMock(
            return_value={
                "config.hardware.device": _live_devices(),
                "config.files.vmPathName": "[LocalDS_0] web01/web01.vmx",
            }
        )
        with (
            patch.object(driver, "_upload_seed") as upload,
            patch.object(driver, "_run_task") as run,
        ):
            driver._finish_vm(
                "vm-99",
                "web01",
                PLACE,
                nics,
                "#cloud-config\n{}\n",
                disk_gb=disk_gb,
                image_size=2 * 1024**3,
            )
        return upload, run.call_args.kwargs["spec"]

    def test_seed_goes_next_to_the_vm_and_is_attached(self, driver, esxi_data):
        upload, spec = self._finish(driver, esxi_data, [{"bridge": "VM Network"}])
        assert upload.call_args.args[1] == "web01/cidata.iso"
        cdrom = next(
            c.device for c in spec.deviceChange if type(c.device).__name__.endswith("VirtualCdrom")
        )
        assert cdrom.backing.fileName == "[LocalDS_0] web01/cidata.iso"

    def test_seed_network_config_uses_the_real_mac(self, driver, esxi_data):
        upload, _ = self._finish(driver, esxi_data, [{"bridge": "VM Network"}])
        mac = MAC
        reader = pycdlib.PyCdlib()
        reader.open_fp(io.BytesIO(upload.call_args.args[2]))
        out = io.BytesIO()
        reader.get_file_from_iso_fp(out, rr_path="/network-config")
        reader.close()
        cfg = yaml.safe_load(out.getvalue())
        assert cfg["ethernets"]["nic0"] == {"match": {"macaddress": mac.lower()}, "dhcp4": True}

    def test_requested_mac_is_pinned_on_the_whole_device(self, driver, esxi_data):
        _, spec = self._finish(
            driver, esxi_data, [{"bridge": "VM Network", "mac": "00:50:56:01:02:03"}]
        )
        nic = next(c.device for c in spec.deviceChange if c.operation == "edit")
        assert (nic.addressType, nic.macAddress) == ("manual", "00:50:56:01:02:03")
        assert nic.backing.deviceName == "VM Network"  # an edit replaces the device as sent

    def test_disk_grows_only_when_asked_for_more(self, driver, esxi_data):
        _, spec = self._finish(driver, esxi_data, [{"bridge": "VM Network"}], disk_gb=20)
        disk = next(
            c.device for c in spec.deviceChange if type(c.device).__name__.endswith("VirtualDisk")
        )
        assert disk.capacityInKB == 20 * 1024 * 1024
        assert disk.backing.fileName == "[LocalDS_0] web01/disk.vmdk"  # vcsim panicked without it
        _, spec = self._finish(driver, esxi_data, [{"bridge": "VM Network"}], disk_gb=1)
        assert not any(type(c.device).__name__.endswith("VirtualDisk") for c in spec.deviceChange)


class TestDestroyAndStatus:
    def test_destroy_powers_off_first(self, driver, esxi_data):
        vm = esxi_data["objects"]["VirtualMachine"][0]
        with patch.object(driver, "_run_task") as run:
            driver.destroy_vm(vm["config.instanceUuid"])
        assert [c.args[0] for c in run.call_args_list] == [
            driver.mo.PowerOffVM_Task,
            driver.mo.Destroy_Task,
        ]

    def test_keep_disks_unregisters(self, driver, esxi_data):
        vm = esxi_data["objects"]["VirtualMachine"][0]
        vm["runtime.powerState"] = "poweredOff"
        driver.destroy_vm(vm["config.instanceUuid"], remove_disk=False)
        driver.mo.UnregisterVM.assert_called_once_with()

    def test_destroy_unknown(self, driver):
        with pytest.raises(RuntimeError):
            driver.destroy_vm("nope")

    def test_status(self, driver, esxi_data):
        vm = esxi_data["objects"]["VirtualMachine"][0]
        vm["guest.net"][0]["ipAddress"] = ["192.0.2.7"]
        vm["guest.hostName"] = "web01"
        status = driver.get_vm_status(vm["config.instanceUuid"])
        assert status["status"] == "running"
        assert status["ip_address"] == "192.0.2.7"
        assert status["hostname"] == "web01"
        assert status["mac_address"]

    def test_waiting_for_an_ip_times_out(self, driver, esxi_data):
        vm = esxi_data["objects"]["VirtualMachine"][0]
        clock = iter([0.0, 1.0, 400.0])
        with (
            patch.object(prov.time, "monotonic", lambda: next(clock)),
            patch.object(prov.time, "sleep"),
        ):
            with pytest.raises(RuntimeError, match="no IP"):
                driver.get_vm_status(vm["config.instanceUuid"], wait_for_ip=True, timeout=300)