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#
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# under the License.

from __future__ import annotations

import logging
from unittest.mock import MagicMock, Mock, PropertyMock, patch

import pytest

pytest.importorskip("airflow.providers.fab")

from tests_common.test_utils.version_compat import AIRFLOW_V_3_0_PLUS

if AIRFLOW_V_3_0_PLUS:
    pytest.skip(
        "``airflow/providers/databricks/plugins/databricks_workflow.py`` is only compatible with Airflow 2.X.",
        allow_module_level=True,
    )

from flask import url_for

from airflow.exceptions import AirflowException
from airflow.models.dagrun import DagRun
from airflow.models.taskinstance import TaskInstanceKey
from airflow.plugins_manager import AirflowPlugin
from airflow.providers.databricks.plugins.databricks_workflow import (
    DatabricksWorkflowPlugin,
    RepairDatabricksTasks,
    WorkflowJobRepairSingleTaskLink,
    WorkflowJobRunLink,
    _get_launch_task_key,
    _repair_task,
    get_databricks_task_ids,
    get_launch_task_id,
    store_databricks_job_run_link,
)

from tests_common import RUNNING_TESTS_AGAINST_AIRFLOW_PACKAGES
from tests_common.test_utils.version_compat import AIRFLOW_V_3_0_PLUS

DAG_ID = "test_dag"
TASK_ID = "test_task"
RUN_ID = "test_run_1"
TASK_INSTANCE_KEY = TaskInstanceKey(dag_id=DAG_ID, task_id=TASK_ID, run_id=RUN_ID, try_number=1)
DATABRICKS_CONN_ID = "databricks_default"
DATABRICKS_RUN_ID = 12345
GROUP_ID = "test_group"
LOG = MagicMock()
TASK_MAP = {
    "task1": MagicMock(dag_id=DAG_ID, task_id="task1", databricks_task_key="task_key1"),
    "task2": MagicMock(dag_id=DAG_ID, task_id="task2", databricks_task_key="task_key2"),
}

logger = logging.getLogger(__name__)


def test_get_databricks_task_ids():
    result = get_databricks_task_ids(GROUP_ID, TASK_MAP, LOG)

    expected_ids = ["task_key1", "task_key2"]
    assert result == expected_ids


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
def test_get_dagrun_airflow2():
    from airflow.providers.databricks.plugins.databricks_workflow import _get_dagrun

    session = MagicMock()
    dag = MagicMock(dag_id=DAG_ID)
    session.query.return_value.filter.return_value.first.return_value = DagRun()

    result = _get_dagrun(dag, RUN_ID, session=session)

    assert isinstance(result, DagRun)


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@patch("airflow.providers.databricks.plugins.databricks_workflow.DatabricksHook")
def test_repair_task(mock_databricks_hook):
    mock_hook_instance = mock_databricks_hook.return_value
    mock_hook_instance.get_latest_repair_id.return_value = 100
    mock_hook_instance.repair_run.return_value = 200

    tasks_to_repair = ["task1", "task2"]
    result = _repair_task(DATABRICKS_CONN_ID, DATABRICKS_RUN_ID, tasks_to_repair, LOG)

    assert result == 200
    mock_hook_instance.get_latest_repair_id.assert_called_once_with(DATABRICKS_RUN_ID)
    mock_hook_instance.repair_run.assert_called_once()


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@patch("airflow.providers.databricks.plugins.databricks_workflow.DatabricksHook")
def test_repair_task_with_params(mock_databricks_hook):
    mock_hook_instance = mock_databricks_hook.return_value
    mock_hook_instance.get_latest_repair_id.return_value = 100
    mock_hook_instance.repair_run.return_value = 200
    mock_hook_instance.get_run.return_value = {
        "overriding_parameters": {
            "key1": "value1",
            "key2": "value2",
        },
    }

    tasks_to_repair = ["task1", "task2"]
    result = _repair_task(DATABRICKS_CONN_ID, DATABRICKS_RUN_ID, tasks_to_repair, LOG)

    expected_payload = {
        "run_id": DATABRICKS_RUN_ID,
        "rerun_tasks": tasks_to_repair,
        "latest_repair_id": 100,
        "overriding_parameters": {
            "key1": "value1",
            "key2": "value2",
        },
    }
    assert result == 200
    mock_hook_instance.get_latest_repair_id.assert_called_once_with(DATABRICKS_RUN_ID)
    mock_hook_instance.get_run.assert_called_once_with(DATABRICKS_RUN_ID)
    mock_hook_instance.repair_run.assert_called_once_with(expected_payload)


def test_get_launch_task_id_no_launch_task():
    task_group = MagicMock(get_child_by_label=MagicMock(side_effect=KeyError))
    task_group.parent_group = None

    with pytest.raises(AirflowException):
        get_launch_task_id(task_group)


def test_get_launch_task_key():
    result = _get_launch_task_key(TASK_INSTANCE_KEY, "launch_task")

    assert isinstance(result, TaskInstanceKey)
    assert result.dag_id == TASK_INSTANCE_KEY.dag_id
    assert result.task_id == "launch_task"
    assert result.run_id == TASK_INSTANCE_KEY.run_id


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@pytest.mark.db_test
def test_get_task_instance_airflow2():
    from airflow.providers.databricks.plugins.databricks_workflow import get_task_instance
    from airflow.www.app import create_app

    app = create_app(testing=True)
    app.config["SERVER_NAME"] = "localhost"

    with app.app_context():
        operator = Mock()
        operator.dag.dag_id = "dag_id"
        operator.task_id = "task_id"
        dttm = "2022-01-01T00:00:00Z"
        session = Mock()
        dag_run = Mock()
        session.query().filter().one_or_none.return_value = dag_run

        with patch(
            "airflow.providers.databricks.plugins.databricks_workflow.DagRun.find", return_value=[dag_run]
        ):
            result = get_task_instance(operator, dttm, session)
            assert result == dag_run


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@pytest.mark.db_test
def test_get_return_url_dag_id_run_id_airflow2():
    from airflow.www.app import create_app

    dag_id = "example_dag"
    run_id = "example_run"

    app = create_app(testing=True)
    app.config["SERVER_NAME"] = "localhost"
    with app.app_context():
        expected_url = url_for("Airflow.grid", dag_id=dag_id, dag_run_id=run_id)
        actual_url = RepairDatabricksTasks._get_return_url(dag_id, run_id)
    assert actual_url == expected_url, f"Expected {expected_url}, got {actual_url}"


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@pytest.mark.db_test
def test_workflow_job_run_link_airflow2():
    from airflow.www.app import create_app

    app = create_app(testing=True)
    app.config["SERVER_NAME"] = "localhost"

    with app.app_context():
        link = WorkflowJobRunLink()
        operator = Mock()
        ti_key = Mock()
        ti_key.dag_id = "dag_id"
        ti_key.task_id = "task_id"
        ti_key.run_id = "run_id"
        ti_key.try_number = 1

        with patch(
            "airflow.providers.databricks.plugins.databricks_workflow.get_task_instance"
        ) as mock_get_task_instance:
            with patch(
                "airflow.providers.databricks.plugins.databricks_workflow.get_xcom_result"
            ) as mock_get_xcom_result:
                with patch(
                    "airflow.providers.databricks.plugins.databricks_workflow._get_dag"
                ) as mock_get_dag:
                    mock_connection = Mock()
                    mock_connection.extra_dejson = {"host": "mockhost"}

                    with patch(
                        "airflow.providers.databricks.hooks.databricks.DatabricksHook.get_connection",
                        return_value=mock_connection,
                    ):
                        mock_get_task_instance.return_value = Mock(key=ti_key)
                        mock_get_xcom_result.return_value = Mock(conn_id="conn_id", run_id=1, job_id=1)
                        mock_get_dag.return_value.get_task = Mock(return_value=Mock(task_id="task_id"))

                        result = link.get_link(operator, ti_key=ti_key)
                        assert "https://mockhost/#job/1/run/1" in result


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
@pytest.mark.skipif(
    RUNNING_TESTS_AGAINST_AIRFLOW_PACKAGES, reason="Web plugin test doesn't work when not against sources"
)
@pytest.mark.db_test
def test_workflow_job_repair_single_failed_link_airflow2():
    from airflow.www.app import create_app

    app = create_app(testing=True)
    app.config["SERVER_NAME"] = "localhost"
    with app.app_context():
        link = WorkflowJobRepairSingleTaskLink()
        operator = Mock()
        operator.task_group = Mock()
        operator.task_group.group_id = "group_id"
        operator.task_group.get_child_by_label = Mock()
        ti_key = Mock()
        ti_key.dag_id = "dag_id"
        ti_key.task_id = "task_id"
        ti_key.run_id = "run_id"
        ti_key.try_number = 1

        with patch(
            "airflow.providers.databricks.plugins.databricks_workflow.get_task_instance"
        ) as mock_get_task_instance:
            with patch(
                "airflow.providers.databricks.plugins.databricks_workflow.get_xcom_result"
            ) as mock_get_xcom_result:
                with patch(
                    "airflow.providers.databricks.plugins.databricks_workflow.DagBag.get_dag"
                ) as mock_get_dag:
                    mock_get_task_instance.return_value = Mock(key=ti_key)
                    mock_get_xcom_result.return_value = Mock(conn_id="conn_id", run_id=1)
                    mock_get_dag.return_value.get_task = Mock(return_value=Mock(task_id="task_id"))

                    result = link.get_link(operator, ti_key=ti_key)
                    assert result.startswith("http://localhost/repair_databricks_job")


@pytest.fixture
def plugin():
    return DatabricksWorkflowPlugin()


def test_plugin_is_airflow_plugin(plugin):
    assert isinstance(plugin, AirflowPlugin)


def test_operator_extra_links(plugin):
    for link in plugin.operator_extra_links:
        assert hasattr(link, "get_link")


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
def test_appbuilder_views_airflow2(plugin):
    assert plugin.appbuilder_views is not None
    assert len(plugin.appbuilder_views) == 1

    repair_view = plugin.appbuilder_views[0]["view"]
    assert isinstance(repair_view, RepairDatabricksTasks)
    assert repair_view.default_view == "repair"


@pytest.mark.skipif(not AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow 3.0+")
class TestDatabricksWorkflowPluginAirflow3:
    """Test Databricks Workflow Plugin functionality specific to Airflow 3.x."""

    def test_plugin_operator_extra_links_limited_functionality(self):
        """Test that operator_extra_links are limited in Airflow 3.x (only job run link)."""
        plugin = DatabricksWorkflowPlugin()

        # In Airflow 3, only WorkflowJobRunLink should be present
        assert len(plugin.operator_extra_links) == 1
        assert isinstance(plugin.operator_extra_links[0], WorkflowJobRunLink)

        # Verify repair links are not present
        link_types = [type(link).__name__ for link in plugin.operator_extra_links]
        assert not any("Repair" in link_type for link_type in link_types)

    def test_plugin_no_appbuilder_views(self):
        """Test that appbuilder_views are not configured in Airflow 3.x."""
        plugin = DatabricksWorkflowPlugin()

        # In Airflow 3, appbuilder_views should not be set (repair functionality disabled)
        assert not getattr(plugin, "appbuilder_views", [])

    def test_store_databricks_job_run_link_function_works(self):
        """Test that store_databricks_job_run_link works correctly in Airflow 3.x."""
        ti_mock = Mock()
        ti_mock.xcom_push = Mock()

        context = {
            "ti": ti_mock,
            "dag": Mock(dag_id="test_dag"),
            "dag_run": Mock(run_id="test_run"),
            "task": Mock(task_id="test_task"),
        }

        metadata = Mock(conn_id="databricks_default", job_id=12345, run_id=67890)

        with patch("airflow.providers.databricks.plugins.databricks_workflow.DatabricksHook") as mock_hook:
            mock_hook_instance = Mock()
            mock_hook_instance.host = "test-databricks-host"
            mock_hook.return_value = mock_hook_instance

            store_databricks_job_run_link(context, metadata, logger)

            ti_mock.xcom_push.assert_called_once()

            call_args = ti_mock.xcom_push.call_args
            assert call_args[1]["key"] == "databricks_job_run_link"
            assert "test-databricks-host" in call_args[1]["value"]
            assert "12345" in call_args[1]["value"]
            assert "67890" in call_args[1]["value"]
            assert ti_mock.xcom_push.call_count == 1

    def test_workflow_job_run_link_uses_xcom(self):
        """Test that WorkflowJobRunLink.get_link uses XCom in Airflow 3.x."""
        link = WorkflowJobRunLink()
        operator = Mock()
        ti_key = TaskInstanceKey(dag_id="test_dag", task_id="test_task", run_id="test_run", try_number=1)

        expected_link = "https://test-host/#job/123/run/456"

        with patch("airflow.providers.databricks.plugins.databricks_workflow.XCom") as mock_xcom:
            mock_xcom.get_value.return_value = expected_link

            result = link.get_link(operator, ti_key=ti_key)

            mock_xcom.get_value.assert_called_once_with(ti_key=ti_key, key="databricks_job_run_link")

            assert result == expected_link

    def test_store_databricks_job_run_link_exception_handling(self):
        """Test that exceptions are properly handled in store_databricks_job_run_link."""
        ti_mock = Mock()
        ti_mock.xcom_push = Mock()

        context = {
            "ti": ti_mock,
            "dag": Mock(dag_id="test_dag"),
            "dag_run": Mock(run_id="test_run"),
            "task": Mock(task_id="test_task"),
        }

        metadata = Mock(conn_id="databricks_default", job_id=12345, run_id=67890)

        with patch("airflow.providers.databricks.plugins.databricks_workflow.DatabricksHook") as mock_hook:
            mock_hook_instance = Mock()
            type(mock_hook_instance).host = PropertyMock(side_effect=Exception("Connection failed"))
            mock_hook.return_value = mock_hook_instance

            store_databricks_job_run_link(context, metadata, logger)

            # Verify no XCom was pushed due to the exception
            ti_mock.xcom_push.assert_not_called()


@pytest.mark.skipif(AIRFLOW_V_3_0_PLUS, reason="Test only for Airflow < 3.0")
class TestDatabricksWorkflowPluginAirflow2:
    """Test Databricks Workflow Plugin functionality specific to Airflow 2.x."""

    def test_plugin_operator_extra_links_full_functionality(self):
        """Test that all operator_extra_links are present in Airflow 2.x."""
        plugin = DatabricksWorkflowPlugin()

        # In Airflow 2.x, all links should be present including repair links
        assert len(plugin.operator_extra_links) >= 2  # At least job run link + repair links
        link_types = [type(link).__name__ for link in plugin.operator_extra_links]
        assert "WorkflowJobRunLink" in link_types
        # Should have repair links in 2.x
        assert any("Repair" in link_type for link_type in link_types)

    def test_plugin_has_appbuilder_views(self):
        """Test that appbuilder_views are configured for repair functionality in Airflow 2.x."""
        plugin = DatabricksWorkflowPlugin()

        # In Airflow 2.x, appbuilder_views should be present for repair functionality
        assert hasattr(plugin, "appbuilder_views")
        assert plugin.appbuilder_views is not None

    def test_store_databricks_job_run_link_returns_early(self):
        """Test that store_databricks_job_run_link returns early in Airflow 2.x."""
        ti_mock = Mock()
        ti_mock.xcom_push = Mock()

        context = {
            "ti": ti_mock,
            "dag": Mock(dag_id="test_dag"),
            "dag_run": Mock(run_id="test_run"),
            "task": Mock(task_id="test_task"),
        }

        metadata = Mock(conn_id="databricks_default", job_id=12345, run_id=67890)

        store_databricks_job_run_link(context, metadata, logger)

        ti_mock.xcom_push.assert_not_called()

    def test_workflow_job_run_link_uses_legacy_method(self):
        """Test that WorkflowJobRunLink.get_link uses legacy method in Airflow 2.x."""
        link = WorkflowJobRunLink()
        operator = Mock()
        operator.task_group = Mock()
        operator.task_group.group_id = "test_group"

        ti_key = TaskInstanceKey(dag_id="test_dag", task_id="test_task", run_id="test_run", try_number=1)

        with patch(
            "airflow.providers.databricks.plugins.databricks_workflow.get_task_instance"
        ) as mock_get_ti:
            with patch(
                "airflow.providers.databricks.plugins.databricks_workflow.get_xcom_result"
            ) as mock_get_xcom:
                with patch(
                    "airflow.providers.databricks.plugins.databricks_workflow._get_dag"
                ) as mock_get_dag:
                    with patch(
                        "airflow.providers.databricks.plugins.databricks_workflow.DatabricksHook"
                    ) as mock_hook:
                        mock_get_ti.return_value = Mock(key=ti_key)
                        mock_get_xcom.return_value = Mock(conn_id="conn_id", run_id=1, job_id=1)
                        mock_get_dag.return_value.get_task.return_value = Mock(task_id="test_task")

                        mock_hook_instance = Mock()
                        mock_hook_instance.host = "test-host"
                        mock_hook.return_value = mock_hook_instance

                        result = link.get_link(operator, ti_key=ti_key)

                        # Verify legacy method was used (should contain databricks host)
                        assert "test-host" in result
                        assert "#job/1/run/1" in result
