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from __future__ import annotations

import uuid
from typing import Any
from unittest.mock import MagicMock, patch

import yaml

from superset.utils import json


def _make_mock_dashboard(json_metadata: dict[str, Any]) -> MagicMock:
    dashboard = MagicMock()
    dashboard.dashboard_title = "Test Dashboard"
    dashboard.theme = None
    dashboard.slices = []
    dashboard.tags = []
    dashboard.export_to_dict.return_value = {
        "position_json": json.dumps(
            {
                "DASHBOARD_VERSION_KEY": "v2",
                "ROOT_ID": {"children": ["GRID_ID"], "id": "ROOT_ID", "type": "ROOT"},
                "GRID_ID": {
                    "children": [],
                    "id": "GRID_ID",
                    "parents": ["ROOT_ID"],
                    "type": "GRID",
                },
                "HEADER_ID": {
                    "id": "HEADER_ID",
                    "meta": {"text": "Test Dashboard"},
                    "type": "HEADER",
                },
            }
        ),
        "json_metadata": json.dumps(json_metadata),
    }
    return dashboard


def test_file_content_replaces_dataset_id_with_uuid_in_display_controls():
    """
    _file_content must replace datasetId with datasetUuid in chart_customization_config
    targets, mirroring what it already does for native_filter_configuration.
    """
    from superset.commands.dashboard.export import ExportDashboardsCommand

    dataset_uuid = str(uuid.uuid4())

    mock_dashboard = _make_mock_dashboard(
        {
            "native_filter_configuration": [],
            "chart_customization_config": [
                {
                    "id": "CUSTOMIZATION-abc",
                    "type": "CHART_CUSTOMIZATION",
                    "targets": [{"datasetId": 99, "column": {"name": "col"}}],
                },
                {
                    "id": "CUSTOMIZATION-divider",
                    "type": "CHART_CUSTOMIZATION_DIVIDER",
                    "targets": [],
                },
            ],
        }
    )

    mock_dataset = MagicMock()
    mock_dataset.uuid = dataset_uuid

    with (
        patch(
            "superset.commands.dashboard.export.DatasetDAO.find_by_id",
            return_value=mock_dataset,
        ),
        patch(
            "superset.commands.dashboard.export.feature_flag_manager.is_feature_enabled",
            return_value=False,
        ),
    ):
        content = ExportDashboardsCommand._file_content(mock_dashboard)

    result = yaml.safe_load(content)
    customizations = result["metadata"]["chart_customization_config"]

    # datasetUuid must be added; datasetId preserved for backward compat
    target = customizations[0]["targets"][0]
    assert target["datasetUuid"] == dataset_uuid
    assert target["datasetId"] == 99

    # Dividers with no targets must be unaffected
    assert customizations[1]["targets"] == []


def test_export_yields_dataset_files_for_display_controls():
    """
    _export must yield dataset files for datasets referenced by display controls.

    The _export generator has a second pass over json_metadata (separate from
    _file_content) whose job is to emit dataset YAML files into the bundle.
    Without this, the round-trip fails: the UUID is in the dashboard YAML but
    the dataset file is absent from the ZIP.
    """
    from superset.commands.dashboard.export import ExportDashboardsCommand

    dataset_id = 42
    mock_dashboard = _make_mock_dashboard(
        {
            "native_filter_configuration": [],
            "chart_customization_config": [
                {
                    "id": "CUSTOMIZATION-abc",
                    "type": "CHART_CUSTOMIZATION",
                    "targets": [{"datasetId": dataset_id}],
                },
            ],
        }
    )

    mock_dataset = MagicMock()
    sentinel_file = ("datasets/my_dataset.yaml", lambda: "dataset_content")
    mock_datasets_cmd = MagicMock()
    mock_datasets_cmd.run.return_value = iter([sentinel_file])

    with (
        patch(
            "superset.commands.dashboard.export.DatasetDAO.find_by_id",
            return_value=mock_dataset,
        ),
        patch(
            "superset.commands.dashboard.export.ExportDatasetsCommand",
            return_value=mock_datasets_cmd,
        ) as mock_datasets_cls,
        patch(
            "superset.commands.dashboard.export.ExportChartsCommand"
        ) as mock_charts_cls,
        patch(
            "superset.commands.dashboard.export.feature_flag_manager.is_feature_enabled",
            return_value=False,
        ),
    ):
        mock_charts_cls.return_value.run.return_value = iter([])
        results = list(ExportDashboardsCommand._export(mock_dashboard))

    mock_datasets_cls.assert_called_once_with([dataset_id])
    mock_datasets_cmd.run.assert_called_once()
    filenames = [name for name, _ in results]
    assert "datasets/my_dataset.yaml" in filenames


def test_file_content_null_chart_customization_config_does_not_raise():
    """
    When chart_customization_config is explicitly null in metadata,
    _file_content must not raise — the `or []` guard handles it.
    """
    from superset.commands.dashboard.export import ExportDashboardsCommand

    mock_dashboard = _make_mock_dashboard(
        {
            "native_filter_configuration": [],
            "chart_customization_config": None,
        }
    )

    with patch(
        "superset.commands.dashboard.export.feature_flag_manager.is_feature_enabled",
        return_value=False,
    ):
        content = ExportDashboardsCommand._file_content(mock_dashboard)

    result = yaml.safe_load(content)
    assert result["metadata"]["chart_customization_config"] is None


def test_file_content_missing_dataset_preserves_dataset_id():
    """
    When DatasetDAO.find_by_id returns None for a display control target,
    datasetId is preserved (dual-write: it was never popped) and no
    datasetUuid is added — the target is not silently emptied.
    """
    from superset.commands.dashboard.export import ExportDashboardsCommand

    mock_dashboard = _make_mock_dashboard(
        {
            "chart_customization_config": [
                {
                    "id": "CUSTOMIZATION-orphan",
                    "type": "CHART_CUSTOMIZATION",
                    "targets": [{"datasetId": 9999}],
                },
            ],
        }
    )

    with (
        patch(
            "superset.commands.dashboard.export.DatasetDAO.find_by_id",
            return_value=None,
        ),
        patch(
            "superset.commands.dashboard.export.feature_flag_manager.is_feature_enabled",
            return_value=False,
        ),
    ):
        content = ExportDashboardsCommand._file_content(mock_dashboard)

    result = yaml.safe_load(content)
    target = result["metadata"]["chart_customization_config"][0]["targets"][0]
    assert target["datasetId"] == 9999
    assert "datasetUuid" not in target