"""Unit tests for WebhookService.

TDD Cycle: RED → GREEN → REFACTOR
"""

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

import pytest

from notebooklm_agent.core.exceptions import (
    NotFoundError,
    ValidationError,
)
from notebooklm_agent.services.webhook_service import WebhookService


@pytest.mark.unit
class TestWebhookServiceRegister:
    """Test suite for webhook registration."""

    async def test_register_webhook_returns_webhook(self):
        """Should register webhook and return it."""
        # Arrange
        service = WebhookService()
        url = "https://example.com/webhook"
        events = ["artifact.completed", "source.ready"]
        secret = "my-secret-key"

        # Act
        result = await service.register(url, events, secret)

        # Assert
        assert result.url == url
        assert result.events == events
        assert result.secret is True
        assert result.active is True

    async def test_register_without_secret(self):
        """Should register webhook without secret."""
        # Arrange
        service = WebhookService()
        url = "https://example.com/webhook"
        events = ["artifact.completed"]

        # Act
        result = await service.register(url, events)

        # Assert
        assert result.secret is False

    async def test_register_http_url_raises_validation_error(self):
        """Should raise ValidationError for HTTP URL."""
        # Arrange
        service = WebhookService()
        url = "http://example.com/webhook"
        events = ["artifact.completed"]

        # Act & Assert
        with pytest.raises(ValidationError) as exc_info:
            await service.register(url, events)

        assert "HTTPS" in str(exc_info.value)

    async def test_register_invalid_event_raises_validation_error(self):
        """Should raise ValidationError for invalid event."""
        # Arrange
        service = WebhookService()
        url = "https://example.com/webhook"
        events = ["invalid.event"]

        # Act & Assert
        with pytest.raises(ValidationError) as exc_info:
            await service.register(url, events)

        assert "Invalid events" in str(exc_info.value)


@pytest.mark.unit
class TestWebhookServiceList:
    """Test suite for listing webhooks."""

    async def test_list_returns_empty_list_initially(self):
        """Should return empty list when no webhooks."""
        # Arrange
        service = WebhookService()

        # Act
        result = await service.list()

        # Assert
        assert result == []

    async def test_list_returns_registered_webhooks(self):
        """Should return list of registered webhooks."""
        # Arrange
        service = WebhookService()
        await service.register("https://example.com/webhook1", ["artifact.completed"])
        await service.register("https://example.com/webhook2", ["source.ready"])

        # Act
        result = await service.list()

        # Assert
        assert len(result) == 2


@pytest.mark.unit
class TestWebhookServiceGet:
    """Test suite for getting webhook."""

    async def test_get_returns_webhook(self):
        """Should return webhook by ID."""
        # Arrange
        service = WebhookService()
        webhook = await service.register("https://example.com/webhook", ["artifact.completed"])

        # Act
        result = await service.get(str(webhook.id))

        # Assert
        assert result.id == webhook.id

    async def test_get_not_found_raises_not_found(self):
        """Should raise NotFoundError if webhook not found."""
        # Arrange
        service = WebhookService()

        # Act & Assert
        with pytest.raises(NotFoundError) as exc_info:
            await service.get("non-existent-id")

        assert "non-existent-id" in str(exc_info.value)


@pytest.mark.unit
class TestWebhookServiceDelete:
    """Test suite for deleting webhooks."""

    async def test_delete_removes_webhook(self):
        """Should delete webhook."""
        # Arrange
        service = WebhookService()
        webhook = await service.register("https://example.com/webhook", ["artifact.completed"])

        # Act
        await service.delete(str(webhook.id))

        # Assert
        with pytest.raises(NotFoundError):
            await service.get(str(webhook.id))

    async def test_delete_not_found_raises_not_found(self):
        """Should raise NotFoundError if webhook not found."""
        # Arrange
        service = WebhookService()

        # Act & Assert
        with pytest.raises(NotFoundError):
            await service.delete("non-existent-id")


@pytest.mark.unit
class TestWebhookServiceSignature:
    """Test suite for HMAC signature generation."""

    def test_generate_signature(self):
        """Should generate HMAC-SHA256 signature."""
        # Arrange
        service = WebhookService()
        payload = '{"event": "test"}'
        secret = "my-secret"

        # Act
        signature = service._generate_signature(payload, secret)

        # Assert
        assert len(signature) == 64  # SHA256 hex is 64 chars
        assert all(c in "0123456789abcdef" for c in signature)

    def test_generate_signature_deterministic(self):
        """Should generate same signature for same input."""
        # Arrange
        service = WebhookService()
        payload = '{"event": "test"}'
        secret = "my-secret"

        # Act
        sig1 = service._generate_signature(payload, secret)
        sig2 = service._generate_signature(payload, secret)

        # Assert
        assert sig1 == sig2


@pytest.mark.unit
class TestWebhookServiceDispatch:
    """Test suite for event dispatching."""

    async def test_dispatch_event_sends_to_matching_webhooks(self):
        """Should dispatch event to webhooks subscribed to that event."""
        # Arrange
        service = WebhookService()
        webhook = await service.register("https://example.com/webhook", ["artifact.completed"])

        with patch.object(service, "_send_webhook") as mock_send:
            mock_send.return_value = True

            # Act
            await service.dispatch_event("artifact.completed", {"artifact_id": "123"})

            # Assert
            mock_send.assert_called_once()

    async def test_dispatch_event_skips_non_matching_webhooks(self):
        """Should not dispatch to webhooks not subscribed to event."""
        # Arrange
        service = WebhookService()
        await service.register("https://example.com/webhook", ["source.ready"])

        with patch.object(service, "_send_webhook") as mock_send:
            # Act
            await service.dispatch_event("artifact.completed", {"artifact_id": "123"})

            # Assert
            mock_send.assert_not_called()


@pytest.mark.unit
class TestWebhookServiceTest:
    """Test suite for testing webhooks."""

    async def test_webhook_sends_test_event(self):
        """Should send test event to webhook."""
        # Arrange
        service = WebhookService()
        webhook = await service.register("https://example.com/webhook", ["artifact.completed"])

        with patch.object(service, "_send_webhook") as mock_send:
            mock_send.return_value = True

            # Act
            result = await service.test_webhook(str(webhook.id))

            # Assert
            assert result is True
            mock_send.assert_called_once()
            # Check it's a test event
            call_args = mock_send.call_args
            assert call_args[0][1] == "webhook.test"

    async def test_webhook_not_found_raises_not_found(self):
        """Should raise NotFoundError if webhook not found."""
        # Arrange
        service = WebhookService()

        # Act & Assert
        with pytest.raises(NotFoundError):
            await service.test_webhook("non-existent-id")