"""
Tests for bug fixes #627 (asset persistence), #670 (title preservation),
and #651 (credential cascade delete).
"""

from unittest.mock import AsyncMock, MagicMock, patch

import pytest
from fastapi.testclient import TestClient

from open_notebook.domain.notebook import Asset, Source


@pytest.fixture
def client():
    """Create test client after environment variables have been cleared by conftest."""
    from api.main import app

    return TestClient(app)


# ============================================================================
# TEST SUITE 1: #627 - Async source creation persists asset
# ============================================================================


class TestAsyncSourceAssetPersistence:
    """Tests for #627 - asset is persisted before async processing.

    These tests hit the real create_source endpoint with mocked DB/command
    calls, verifying that the Source saved to the database has the correct
    asset set *before* async processing begins.
    """

    @pytest.mark.asyncio
    @patch("api.routers.sources.CommandService.submit_command_job", new_callable=AsyncMock)
    @patch("api.routers.sources.Source.add_to_notebook", new_callable=AsyncMock)
    @patch("api.routers.sources.Notebook.get", new_callable=AsyncMock)
    async def test_async_link_source_persists_url_asset(
        self, mock_nb_get, mock_add_nb, mock_submit, client
    ):
        """POST /sources with type=link and async_processing=true persists Asset(url=...)."""
        mock_nb_get.return_value = MagicMock()  # notebook exists
        mock_submit.return_value = "command:123"

        # Track the Source instance that save() is called on
        saved_sources = []

        async def capture_save(self_source):
            saved_sources.append(self_source)
            self_source.id = "source:fake"
            self_source.command = None

        with patch.object(Source, "save", autospec=True, side_effect=capture_save):
            response = client.post(
                "/api/sources",
                data={
                    "type": "link",
                    "url": "https://example.com/article",
                    "notebooks": '["notebook:1"]',
                    "async_processing": "true",
                },
            )

        assert response.status_code == 200
        assert len(saved_sources) >= 1

        # The first save should have the asset with URL
        source = saved_sources[0]
        assert source.asset is not None
        assert source.asset.url == "https://example.com/article"
        assert source.asset.file_path is None

    @pytest.mark.asyncio
    @patch("api.routers.sources.CommandService.submit_command_job", new_callable=AsyncMock)
    @patch("api.routers.sources.Source.add_to_notebook", new_callable=AsyncMock)
    @patch("api.routers.sources.Notebook.get", new_callable=AsyncMock)
    @patch("api.routers.sources.save_uploaded_file", new_callable=AsyncMock)
    async def test_async_upload_source_persists_file_asset(
        self, mock_upload, mock_nb_get, mock_add_nb, mock_submit, client
    ):
        """POST /sources with type=upload and async_processing=true persists Asset(file_path=...)."""
        mock_nb_get.return_value = MagicMock()
        mock_upload.return_value = "/tmp/uploads/video.mp4"
        mock_submit.return_value = "command:123"

        saved_sources = []

        async def capture_save(self_source):
            saved_sources.append(self_source)
            self_source.id = "source:fake"
            self_source.command = None

        with patch.object(Source, "save", autospec=True, side_effect=capture_save):
            response = client.post(
                "/api/sources",
                data={
                    "type": "upload",
                    "notebooks": '["notebook:1"]',
                    "async_processing": "true",
                },
                files={"file": ("video.mp4", b"fake content", "video/mp4")},
            )

        assert response.status_code == 200
        assert len(saved_sources) >= 1

        source = saved_sources[0]
        assert source.asset is not None
        assert source.asset.file_path == "/tmp/uploads/video.mp4"
        assert source.asset.url is None

    @pytest.mark.asyncio
    @patch("api.routers.sources.CommandService.submit_command_job", new_callable=AsyncMock)
    @patch("api.routers.sources.Source.add_to_notebook", new_callable=AsyncMock)
    @patch("api.routers.sources.Notebook.get", new_callable=AsyncMock)
    async def test_async_text_source_has_no_asset(
        self, mock_nb_get, mock_add_nb, mock_submit, client
    ):
        """POST /sources with type=text and async_processing=true has asset=None."""
        mock_nb_get.return_value = MagicMock()
        mock_submit.return_value = "command:123"

        saved_sources = []

        async def capture_save(self_source):
            saved_sources.append(self_source)
            self_source.id = "source:fake"
            self_source.command = None

        with patch.object(Source, "save", autospec=True, side_effect=capture_save):
            response = client.post(
                "/api/sources",
                data={
                    "type": "text",
                    "content": "Some text content",
                    "notebooks": '["notebook:1"]',
                    "async_processing": "true",
                },
            )

        assert response.status_code == 200
        assert len(saved_sources) >= 1

        source = saved_sources[0]
        assert source.asset is None


# ============================================================================
# TEST SUITE 2: #670 - Custom title preservation
# ============================================================================


class TestTitlePreservation:
    """Tests for #670 - user-set titles are preserved after processing."""

    @pytest.mark.asyncio
    @patch("open_notebook.graphs.source.Source.get")
    async def test_custom_title_preserved(self, mock_get):
        """User-set title is NOT overwritten by content_state.title."""
        from open_notebook.graphs.source import save_source

        mock_source = MagicMock(spec=Source)
        mock_source.title = "My Custom Research Title"
        mock_source.save = AsyncMock()
        mock_get.return_value = mock_source

        content_state = MagicMock()
        content_state.title = "video.mp4"
        content_state.url = "https://example.com"
        content_state.file_path = None
        content_state.content = "Some content"

        state = {
            "source_id": "source:123",
            "content_state": content_state,
            "embed": False,
            "apply_transformations": [],
        }

        await save_source(state)

        assert mock_source.title == "My Custom Research Title"
        mock_source.save.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("open_notebook.graphs.source.Source.get")
    async def test_placeholder_title_replaced(self, mock_get):
        """Placeholder 'Processing...' title IS replaced by extracted title."""
        from open_notebook.graphs.source import save_source

        mock_source = MagicMock(spec=Source)
        mock_source.title = "Processing..."
        mock_source.save = AsyncMock()
        mock_get.return_value = mock_source

        content_state = MagicMock()
        content_state.title = "Extracted Article Title"
        content_state.url = "https://example.com"
        content_state.file_path = None
        content_state.content = "Some content"

        state = {
            "source_id": "source:123",
            "content_state": content_state,
            "embed": False,
            "apply_transformations": [],
        }

        await save_source(state)

        assert mock_source.title == "Extracted Article Title"
        mock_source.save.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("open_notebook.graphs.source.Source.get")
    async def test_none_title_replaced(self, mock_get):
        """None title IS replaced by extracted title."""
        from open_notebook.graphs.source import save_source

        mock_source = MagicMock(spec=Source)
        mock_source.title = None
        mock_source.save = AsyncMock()
        mock_get.return_value = mock_source

        content_state = MagicMock()
        content_state.title = "Extracted Title"
        content_state.url = None
        content_state.file_path = "/tmp/file.pdf"
        content_state.content = "Content"

        state = {
            "source_id": "source:123",
            "content_state": content_state,
            "embed": False,
            "apply_transformations": [],
        }

        await save_source(state)

        assert mock_source.title == "Extracted Title"
        mock_source.save.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("open_notebook.graphs.source.Source.get")
    async def test_empty_title_replaced(self, mock_get):
        """Empty string title IS replaced by extracted title."""
        from open_notebook.graphs.source import save_source

        mock_source = MagicMock(spec=Source)
        mock_source.title = ""
        mock_source.save = AsyncMock()
        mock_get.return_value = mock_source

        content_state = MagicMock()
        content_state.title = "Extracted Title"
        content_state.url = None
        content_state.file_path = None
        content_state.content = "Content"

        state = {
            "source_id": "source:123",
            "content_state": content_state,
            "embed": False,
            "apply_transformations": [],
        }

        await save_source(state)

        assert mock_source.title == "Extracted Title"
        mock_source.save.assert_awaited_once()


# ============================================================================
# TEST SUITE 3: #651 - Credential cascade delete
# ============================================================================


class TestCredentialCascadeDelete:
    """Tests for #651 - deleting credential cascade-deletes linked models."""

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_cascade_delete_linked_models(self, mock_get, client):
        """Deleting credential without options cascade-deletes linked models."""
        mock_model1 = AsyncMock()
        mock_model1.id = "model:1"
        mock_model1.provider = "openai"
        mock_model1.name = "gpt-4"

        mock_model2 = AsyncMock()
        mock_model2.id = "model:2"
        mock_model2.provider = "openai"
        mock_model2.name = "gpt-3.5-turbo"

        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(
            return_value=[mock_model1, mock_model2]
        )
        mock_cred.delete = AsyncMock()
        mock_get.return_value = mock_cred

        response = client.delete("/api/credentials/cred:123")

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 2
        assert data["message"] == "Credential deleted successfully"

        mock_model1.delete.assert_awaited_once()
        mock_model2.delete.assert_awaited_once()
        mock_cred.delete.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_delete_credential_no_linked_models(self, mock_get, client):
        """Deleting credential with no linked models works cleanly."""
        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(return_value=[])
        mock_cred.delete = AsyncMock()
        mock_get.return_value = mock_cred

        response = client.delete("/api/credentials/cred:123")

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 0
        mock_cred.delete.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_migrate_models_instead_of_delete(self, mock_get, client):
        """Passing migrate_to reassigns models instead of deleting them."""
        mock_model = AsyncMock()
        mock_model.id = "model:1"
        mock_model.credential = "cred:123"
        mock_model.save = AsyncMock()

        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(return_value=[mock_model])
        mock_cred.delete = AsyncMock()

        mock_target_cred = AsyncMock()
        mock_target_cred.id = "cred:456"

        # First call returns cred to delete, second returns target
        mock_get.side_effect = [mock_cred, mock_target_cred]

        response = client.delete(
            "/api/credentials/cred:123?migrate_to=cred:456"
        )

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 0  # Models were migrated, not deleted
        mock_model.save.assert_awaited_once()
        assert mock_model.credential == "cred:456"
        mock_cred.delete.assert_awaited_once()


if __name__ == "__main__":
    pytest.main([__file__, "-v"])