"""Unit tests for ArtifactService.

TDD Cycle: RED → GREEN → REFACTOR
"""

from datetime import datetime
from unittest.mock import AsyncMock, MagicMock
from uuid import UUID, uuid4

import pytest

from notebooklm_agent.core.exceptions import (
    NotebookLMError,
    NotFoundError,
)
from notebooklm_agent.services.artifact_service import ArtifactService


@pytest.mark.unit
class TestArtifactServiceInit:
    """Test suite for ArtifactService initialization."""

    async def test_get_client_returns_existing_client(self):
        """Should return existing client if already initialized."""
        # Arrange
        mock_client = AsyncMock()
        service = ArtifactService(client=mock_client)

        # Act
        client = await service._get_client()

        # Assert
        assert client == mock_client


@pytest.mark.unit
class TestArtifactServiceGenerateAudio:
    """Test suite for generate_audio method."""

    async def test_generate_audio_returns_generation_response(self):
        """Should start audio generation and return response."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_result = MagicMock()
        mock_result.id = str(uuid4())
        mock_result.status = "processing"

        mock_notebook.generate_audio.return_value = mock_result
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.generate_audio(
            notebook_id,
            instructions="Make it engaging",
            format="deep-dive",
            length="long",
            language="en",
        )

        # Assert
        assert result.status == "processing"
        assert str(result.artifact_id) == str(mock_result.id)
        assert result.estimated_time_seconds == 600
        assert "Audio generation started" in result.message

    async def test_generate_audio_notebook_not_found_raises_not_found(self):
        """Should raise NotFoundError if notebook not found."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_client.notebooks.get.side_effect = Exception("notebook not found")

        service = ArtifactService(client=mock_client)

        # Act & Assert
        with pytest.raises(NotFoundError) as exc_info:
            await service.generate_audio(notebook_id)

        assert str(notebook_id) in str(exc_info.value)


@pytest.mark.unit
class TestArtifactServiceGenerateVideo:
    """Test suite for generate_video method."""

    async def test_generate_video_returns_generation_response(self):
        """Should start video generation and return response."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_result = MagicMock()
        mock_result.id = str(uuid4())
        mock_result.status = "processing"

        mock_notebook.generate_video.return_value = mock_result
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.generate_video(
            notebook_id,
            instructions="Create engaging video",
            style="whiteboard",
            language="en",
        )

        # Assert
        assert result.status == "processing"
        assert result.estimated_time_seconds == 1800


@pytest.mark.unit
class TestArtifactServiceGenerateQuiz:
    """Test suite for generate_quiz method."""

    async def test_generate_quiz_returns_generation_response(self):
        """Should start quiz generation and return response."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_result = MagicMock()
        mock_result.id = str(uuid4())
        mock_result.status = "processing"

        mock_notebook.generate_quiz.return_value = mock_result
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.generate_quiz(
            notebook_id,
            difficulty="medium",
            quantity="standard",
        )

        # Assert
        assert result.status == "processing"
        assert result.estimated_time_seconds == 600


@pytest.mark.unit
class TestArtifactServiceGenerateMindMap:
    """Test suite for generate_mind_map method."""

    async def test_generate_mind_map_returns_generation_response(self):
        """Should generate mind map (instant) and return response."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_result = MagicMock()
        mock_result.id = str(uuid4())
        mock_result.status = "completed"

        mock_notebook.generate_mind_map.return_value = mock_result
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.generate_mind_map(notebook_id)

        # Assert
        assert result.status == "completed"
        assert result.estimated_time_seconds == 10


@pytest.mark.unit
class TestArtifactServiceListArtifacts:
    """Test suite for list_artifacts method."""

    async def test_list_artifacts_returns_list(self):
        """Should return list of artifacts."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()

        mock_artifact = MagicMock()
        mock_artifact.id = str(uuid4())
        mock_artifact.type = "audio"
        mock_artifact.title = "Podcast"
        mock_artifact.status = "completed"
        mock_artifact.created_at = datetime.utcnow()
        mock_artifact.completed_at = datetime.utcnow()
        mock_artifact.download_url = "https://example.com/download"

        mock_notebook.artifacts.list.return_value = [mock_artifact]
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.list_artifacts(notebook_id)

        # Assert
        assert len(result) == 1
        assert result[0].type == "audio"
        assert result[0].status == "completed"

    async def test_list_artifacts_empty_returns_empty_list(self):
        """Should return empty list if no artifacts."""
        # Arrange
        notebook_id = uuid4()
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_notebook.artifacts.list.return_value = []
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.list_artifacts(notebook_id)

        # Assert
        assert result == []


@pytest.mark.unit
class TestArtifactServiceGetStatus:
    """Test suite for get_status method."""

    async def test_get_status_returns_artifact(self):
        """Should return artifact with status."""
        # Arrange
        notebook_id = uuid4()
        artifact_id = str(uuid4())
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()

        mock_artifact = MagicMock()
        mock_artifact.id = artifact_id
        mock_artifact.type = "video"
        mock_artifact.title = "Video"
        mock_artifact.status = "processing"
        mock_artifact.created_at = datetime.utcnow()
        mock_artifact.completed_at = None
        mock_artifact.download_url = None

        mock_notebook.artifacts.get.return_value = mock_artifact
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act
        result = await service.get_status(notebook_id, artifact_id)

        # Assert
        assert str(result.id) == artifact_id
        assert result.type == "video"
        assert result.status == "processing"

    async def test_get_status_artifact_not_found_raises_not_found(self):
        """Should raise NotFoundError if artifact not found."""
        # Arrange
        notebook_id = uuid4()
        artifact_id = str(uuid4())
        mock_client = AsyncMock()
        mock_notebook = AsyncMock()
        mock_notebook.artifacts.get.side_effect = Exception("artifact not found")
        mock_client.notebooks.get.return_value = mock_notebook

        service = ArtifactService(client=mock_client)

        # Act & Assert
        with pytest.raises(NotFoundError) as exc_info:
            await service.get_status(notebook_id, artifact_id)

        assert artifact_id in str(exc_info.value)


@pytest.mark.unit
class TestArtifactServiceEstimatedTimes:
    """Test suite for estimated times."""

    def test_estimated_times_defined(self):
        """Should have estimated times for all artifact types."""
        # Arrange
        service = ArtifactService()

        # Assert
        assert service.ESTIMATED_TIMES["audio"] == 600
        assert service.ESTIMATED_TIMES["video"] == 1800
        assert service.ESTIMATED_TIMES["mind-map"] == 10