"""Tests for the Homevolt config flow."""

from ipaddress import IPv4Address
from unittest.mock import AsyncMock, MagicMock

from homevolt import HomevoltAuthenticationError, HomevoltConnectionError
import pytest

from homeassistant.components.homevolt.const import DOMAIN
from homeassistant.config_entries import SOURCE_USER, SOURCE_ZEROCONF
from homeassistant.const import CONF_HOST, CONF_PASSWORD
from homeassistant.core import HomeAssistant
from homeassistant.data_entry_flow import FlowResultType
from homeassistant.helpers.service_info.zeroconf import ZeroconfServiceInfo

from tests.common import MockConfigEntry

DISCOVERY_INFO = ZeroconfServiceInfo(
    ip_address=IPv4Address("192.168.1.123"),
    ip_addresses=[IPv4Address("192.168.1.123")],
    port=80,
    hostname="homevolt.local.",
    type="_http._tcp.local.",
    name="homevolt._http._tcp.local.",
    properties={},
)


async def test_full_flow_success(
    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_homevolt_client: MagicMock
) -> None:
    """Test a complete successful user flow."""
    result = await hass.config_entries.flow.async_init(
        DOMAIN, context={"source": SOURCE_USER}
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "user"
    assert result["errors"] == {}

    user_input = {
        CONF_HOST: "192.168.1.100",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], user_input
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {CONF_HOST: "192.168.1.100", CONF_PASSWORD: None}
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


async def test_flow_auth_error_then_password_success(
    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_homevolt_client: MagicMock
) -> None:
    """Test flow when authentication is required."""
    result = await hass.config_entries.flow.async_init(
        DOMAIN, context={"source": SOURCE_USER}
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "user"
    assert result["errors"] == {}

    user_input = {
        CONF_HOST: "192.168.1.100",
    }

    mock_homevolt_client.update_info.side_effect = HomevoltAuthenticationError

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], user_input
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "credentials"
    assert result["errors"] == {}

    # Now provide password - should succeed
    mock_homevolt_client.update_info.side_effect = None

    password_input = {
        CONF_PASSWORD: "test-password",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], password_input
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {
        CONF_HOST: "192.168.1.100",
        CONF_PASSWORD: "test-password",
    }
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


@pytest.mark.parametrize(
    ("exception", "expected_error"),
    [
        (HomevoltConnectionError, "cannot_connect"),
        (Exception, "unknown"),
    ],
)
async def test_step_user_errors(
    hass: HomeAssistant,
    mock_setup_entry: AsyncMock,
    mock_homevolt_client: MagicMock,
    exception: Exception,
    expected_error: str,
) -> None:
    """Test error cases for the user step with recovery."""
    result = await hass.config_entries.flow.async_init(
        DOMAIN, context={"source": SOURCE_USER}
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "user"
    assert result["errors"] == {}

    user_input = {
        CONF_HOST: "192.168.1.100",
    }

    mock_homevolt_client.update_info.side_effect = exception

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], user_input
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "user"
    assert result["errors"] == {"base": expected_error}

    mock_homevolt_client.update_info.side_effect = None

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        user_input,
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {CONF_HOST: "192.168.1.100", CONF_PASSWORD: None}
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


@pytest.mark.usefixtures("mock_setup_entry")
async def test_duplicate_entry(
    hass: HomeAssistant,
    mock_homevolt_client: MagicMock,
    mock_config_entry: MockConfigEntry,
) -> None:
    """Test that a duplicate device_id aborts the flow."""
    mock_config_entry.add_to_hass(hass)

    result = await hass.config_entries.flow.async_init(
        DOMAIN, context={"source": SOURCE_USER}
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "user"
    assert result["errors"] == {}

    user_input = {
        CONF_HOST: "192.168.1.200",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        user_input,
    )

    assert result["type"] is FlowResultType.ABORT
    assert result["reason"] == "already_configured"


async def test_credentials_step_invalid_password(
    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_homevolt_client: MagicMock
) -> None:
    """Test invalid password in credentials step shows error."""
    result = await hass.config_entries.flow.async_init(
        DOMAIN, context={"source": SOURCE_USER}
    )

    user_input = {
        CONF_HOST: "192.168.1.100",
    }

    mock_homevolt_client.update_info.side_effect = HomevoltAuthenticationError

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], user_input
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "credentials"

    # Provide wrong password - should show error
    password_input = {
        CONF_PASSWORD: "wrong-password",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], password_input
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "credentials"
    assert result["errors"] == {"base": "invalid_auth"}

    mock_homevolt_client.update_info.side_effect = None

    password_input = {
        CONF_PASSWORD: "correct-password",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"], password_input
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {
        CONF_HOST: "192.168.1.100",
        CONF_PASSWORD: "correct-password",
    }
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


@pytest.mark.usefixtures("mock_setup_entry")
async def test_reauth_success(
    hass: HomeAssistant,
    mock_homevolt_client: MagicMock,
    mock_config_entry: MockConfigEntry,
) -> None:
    """Test successful reauthentication flow."""
    mock_config_entry.add_to_hass(hass)

    result = await mock_config_entry.start_reauth_flow(hass)

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "reauth_confirm"
    assert result["description_placeholders"] == {
        "host": "127.0.0.1",
        "name": "Homevolt",
    }

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "new-password"},
    )

    assert result["type"] is FlowResultType.ABORT
    assert result["reason"] == "reauth_successful"
    assert mock_config_entry.unique_id == "40580137858664"
    assert mock_config_entry.data == {
        CONF_HOST: "127.0.0.1",
        CONF_PASSWORD: "new-password",
    }


@pytest.mark.parametrize(
    ("exception", "expected_error"),
    [
        (HomevoltAuthenticationError, "invalid_auth"),
        (HomevoltConnectionError, "cannot_connect"),
        (Exception, "unknown"),
    ],
)
@pytest.mark.usefixtures("mock_setup_entry")
async def test_reauth_flow_errors(
    hass: HomeAssistant,
    mock_homevolt_client: MagicMock,
    mock_config_entry: MockConfigEntry,
    exception: Exception,
    expected_error: str,
) -> None:
    """Test reauthentication flow with errors and recovery."""
    mock_config_entry.add_to_hass(hass)

    result = await mock_config_entry.start_reauth_flow(hass)

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "reauth_confirm"

    mock_homevolt_client.update_info.side_effect = exception

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "wrong-password"},
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "reauth_confirm"
    assert result["errors"] == {"base": expected_error}

    mock_homevolt_client.update_info.side_effect = None

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "correct-password"},
    )

    assert result["type"] is FlowResultType.ABORT
    assert result["reason"] == "reauth_successful"
    assert mock_config_entry.data == {
        CONF_HOST: "127.0.0.1",
        CONF_PASSWORD: "correct-password",
    }


async def test_zeroconf_confirm_flow_success(
    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_homevolt_client: MagicMock
) -> None:
    """Test zeroconf flow shows confirm step before creating entry."""

    result = await hass.config_entries.flow.async_init(
        DOMAIN,
        context={"source": SOURCE_ZEROCONF},
        data=DISCOVERY_INFO,
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "zeroconf_confirm"
    assert result["description_placeholders"] == {"host": "192.168.1.123"}

    result = await hass.config_entries.flow.async_configure(result["flow_id"], {})

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {CONF_HOST: "192.168.1.123", CONF_PASSWORD: None}
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


@pytest.mark.usefixtures("mock_setup_entry")
async def test_zeroconf_duplicate_aborts(
    hass: HomeAssistant,
    mock_homevolt_client: MagicMock,
    mock_config_entry: MockConfigEntry,
) -> None:
    """Test zeroconf flow aborts when unique id is already configured."""
    mock_config_entry.add_to_hass(hass)

    result = await hass.config_entries.flow.async_init(
        DOMAIN,
        context={"source": SOURCE_ZEROCONF},
        data=DISCOVERY_INFO,
    )

    assert result["type"] is FlowResultType.ABORT
    assert result["reason"] == "already_configured"
    assert mock_config_entry.data[CONF_HOST] == "192.168.1.123"


async def test_zeroconf_confirm_with_password_success(
    hass: HomeAssistant,
    mock_setup_entry: AsyncMock,
    mock_homevolt_client: MagicMock,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """Test zeroconf confirm collects password when auth is required."""

    mock_homevolt_client.update_info.side_effect = HomevoltAuthenticationError

    result = await hass.config_entries.flow.async_init(
        DOMAIN,
        context={"source": SOURCE_ZEROCONF},
        data=DISCOVERY_INFO,
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "zeroconf_confirm"
    assert result["description_placeholders"] == {"host": "192.168.1.123"}

    mock_homevolt_client.update_info.side_effect = None

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "test-password"},
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {
        CONF_HOST: "192.168.1.123",
        CONF_PASSWORD: "test-password",
    }
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


async def test_zeroconf_confirm_with_password_invalid_then_success(
    hass: HomeAssistant,
    mock_setup_entry: AsyncMock,
    mock_homevolt_client: MagicMock,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """Test zeroconf confirm shows error on invalid password, then succeeds."""

    mock_homevolt_client.update_info.side_effect = HomevoltAuthenticationError

    result = await hass.config_entries.flow.async_init(
        DOMAIN,
        context={"source": SOURCE_ZEROCONF},
        data=DISCOVERY_INFO,
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "zeroconf_confirm"

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "wrong-password"},
    )

    assert result["type"] is FlowResultType.FORM
    assert result["step_id"] == "zeroconf_confirm"
    assert result["errors"] == {"base": "invalid_auth"}

    mock_homevolt_client.update_info.side_effect = None

    result = await hass.config_entries.flow.async_configure(
        result["flow_id"],
        {CONF_PASSWORD: "correct-password"},
    )

    assert result["type"] is FlowResultType.CREATE_ENTRY
    assert result["title"] == "Homevolt"
    assert result["data"] == {
        CONF_HOST: "192.168.1.123",
        CONF_PASSWORD: "correct-password",
    }
    assert result["result"].unique_id == "40580137858664"
    assert len(mock_setup_entry.mock_calls) == 1


@pytest.mark.parametrize(
    ("exception", "expected_reason"),
    [
        (HomevoltConnectionError, "cannot_connect"),
        (Exception("Unexpected error"), "unknown"),
    ],
    ids=["connection_error", "unknown_error"],
)
@pytest.mark.usefixtures("mock_setup_entry")
async def test_zeroconf_error_aborts(
    hass: HomeAssistant,
    mock_homevolt_client: MagicMock,
    exception: Exception,
    expected_reason: str,
) -> None:
    """Test zeroconf flow aborts on error during discovery."""
    mock_homevolt_client.update_info.side_effect = exception

    result = await hass.config_entries.flow.async_init(
        DOMAIN,
        context={"source": SOURCE_ZEROCONF},
        data=DISCOVERY_INFO,
    )

    assert result["type"] is FlowResultType.ABORT
    assert result["reason"] == expected_reason