# backend/tests/test_script_builder.py
"""Tests for the Script Builder API endpoints."""
import pytest
import uuid
from unittest.mock import AsyncMock, patch, PropertyMock

import sqlalchemy as sa


class TestScriptBuilderSessions:
    """Test Script Builder session CRUD."""

    @pytest.mark.asyncio
    async def test_create_session(self, client, auth_headers):
        """Creating a builder session returns a valid session."""
        resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        assert resp.status_code == 201
        data = resp.json()
        assert data["language"] == "powershell"
        assert data["messages"] == []
        assert data["message_count"] == 0
        assert data["title"] is None

    @pytest.mark.asyncio
    async def test_create_session_invalid_language(self, client, auth_headers):
        """Invalid language is rejected."""
        resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "cobol"},
            headers=auth_headers,
        )
        assert resp.status_code == 422

    @pytest.mark.asyncio
    async def test_create_session_bash(self, client, auth_headers):
        """Bash language is accepted."""
        resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "bash"},
            headers=auth_headers,
        )
        assert resp.status_code == 201
        assert resp.json()["language"] == "bash"

    @pytest.mark.asyncio
    async def test_list_sessions_empty(self, client, auth_headers):
        """Listing sessions when none exist returns empty list."""
        resp = await client.get(
            "/api/v1/scripts/builder/sessions",
            headers=auth_headers,
        )
        assert resp.status_code == 200
        assert resp.json() == []

    @pytest.mark.asyncio
    async def test_list_sessions_returns_summaries(self, client, auth_headers):
        """Listed sessions are lightweight (no messages field)."""
        # Create a session first
        await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        resp = await client.get(
            "/api/v1/scripts/builder/sessions",
            headers=auth_headers,
        )
        assert resp.status_code == 200
        data = resp.json()
        assert len(data) == 1
        assert "messages" not in data[0]
        assert "language" in data[0]
        assert "title" in data[0]

    @pytest.mark.asyncio
    async def test_get_session_detail(self, client, auth_headers):
        """Getting a session by ID returns full detail with messages."""
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "python"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        resp = await client.get(
            f"/api/v1/scripts/builder/sessions/{session_id}",
            headers=auth_headers,
        )
        assert resp.status_code == 200
        data = resp.json()
        assert data["id"] == session_id
        assert "messages" in data
        assert data["language"] == "python"

    @pytest.mark.asyncio
    async def test_get_session_not_found(self, client, auth_headers):
        """Getting a nonexistent session returns 404."""
        fake_id = str(uuid.uuid4())
        resp = await client.get(
            f"/api/v1/scripts/builder/sessions/{fake_id}",
            headers=auth_headers,
        )
        assert resp.status_code == 404

    @pytest.mark.asyncio
    async def test_delete_session(self, client, auth_headers):
        """Deleting a session removes it."""
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        resp = await client.delete(
            f"/api/v1/scripts/builder/sessions/{session_id}",
            headers=auth_headers,
        )
        assert resp.status_code == 204

        # Verify it's gone
        resp = await client.get(
            f"/api/v1/scripts/builder/sessions/{session_id}",
            headers=auth_headers,
        )
        assert resp.status_code == 404

    @pytest.mark.asyncio
    async def test_delete_session_not_found(self, client, auth_headers):
        """Deleting a nonexistent session returns 404."""
        fake_id = str(uuid.uuid4())
        resp = await client.delete(
            f"/api/v1/scripts/builder/sessions/{fake_id}",
            headers=auth_headers,
        )
        assert resp.status_code == 404


class TestScriptBuilderMessages:
    """Test sending messages (requires AI mock)."""

    @pytest.fixture
    def _enable_ai(self):
        """Mock AI as enabled for tests without API key."""
        with patch.object(
            type(__import__("app.core.config", fromlist=["settings"]).settings),
            "ai_enabled",
            new_callable=PropertyMock,
            return_value=True,
        ):
            yield

    @pytest.fixture
    def _mock_ai_response(self):
        """Mock the AI provider to return a script response."""
        mock_response = (
            'Here is your script:\n\n```powershell\nGet-Process | Format-Table\n```\n\nSaved as `Get-Processes.ps1`.',
            100,  # input_tokens
            200,  # output_tokens
        )
        with patch("app.services.script_builder_service.get_ai_provider") as mock:
            provider = AsyncMock()
            provider.generate_text = AsyncMock(return_value=mock_response)
            mock.return_value = provider
            yield

    @pytest.mark.asyncio
    async def test_send_message(self, client, auth_headers, _enable_ai, _mock_ai_response):
        """Sending a message returns AI response with script."""
        # Create session
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        # Send message
        resp = await client.post(
            f"/api/v1/scripts/builder/sessions/{session_id}/messages",
            json={"content": "List all running processes"},
            headers=auth_headers,
        )
        assert resp.status_code == 200
        data = resp.json()
        assert data["role"] == "assistant"
        assert data["script"] is not None
        assert "Get-Process" in data["script"]
        assert data["script_filename"] == "Get-Processes.ps1"
        assert data["line_count"] == 1

    @pytest.mark.asyncio
    async def test_send_message_updates_session(self, client, auth_headers, _enable_ai, _mock_ai_response):
        """Sending a message updates session state."""
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        await client.post(
            f"/api/v1/scripts/builder/sessions/{session_id}/messages",
            json={"content": "List processes"},
            headers=auth_headers,
        )

        # Check session was updated
        resp = await client.get(
            f"/api/v1/scripts/builder/sessions/{session_id}",
            headers=auth_headers,
        )
        data = resp.json()
        assert data["message_count"] == 1
        assert data["latest_script"] is not None
        assert len(data["messages"]) == 2  # user + assistant
        assert data["title"] is not None


class TestScriptBuilderSaveToLibrary:
    """Test saving generated scripts to the library."""

    @pytest.fixture
    def _enable_ai(self):
        with patch.object(
            type(__import__("app.core.config", fromlist=["settings"]).settings),
            "ai_enabled",
            new_callable=PropertyMock,
            return_value=True,
        ):
            yield

    @pytest.fixture
    def _mock_ai_response(self):
        mock_response = (
            'Here is your script:\n\n```powershell\nGet-Process | Format-Table\n```\n\nSaved as `Get-Processes.ps1`.',
            100, 200,
        )
        with patch("app.services.script_builder_service.get_ai_provider") as mock:
            provider = AsyncMock()
            provider.generate_text = AsyncMock(return_value=mock_response)
            mock.return_value = provider
            yield

    @pytest.fixture
    async def _seed_ai_category(self, test_db):
        """Seed the AI Generated category for save tests."""
        await test_db.execute(
            sa.text("""
                INSERT INTO script_categories (id, name, slug, description, icon, sort_order, is_active, created_at, updated_at)
                VALUES (
                    'a0000000-0000-0000-0000-000000000001'::uuid,
                    'AI Generated', 'ai-generated', 'Scripts from AI', 'sparkles', 100, true, NOW(), NOW()
                )
                ON CONFLICT (slug) DO NOTHING
            """)
        )
        await test_db.commit()

    @pytest.mark.asyncio
    async def test_save_to_library_no_script(self, client, auth_headers):
        """Cannot save if no script has been generated."""
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        resp = await client.post(
            f"/api/v1/scripts/builder/sessions/{session_id}/save",
            json={"name": "Test Script"},
            headers=auth_headers,
        )
        assert resp.status_code == 400
        assert "No script" in resp.json()["detail"]

    @pytest.mark.asyncio
    async def test_save_to_library_success(
        self, client, auth_headers, _enable_ai, _mock_ai_response, _seed_ai_category
    ):
        """Saving a generated script creates a ScriptTemplate."""
        # Create session and generate a script
        create_resp = await client.post(
            "/api/v1/scripts/builder/sessions",
            json={"language": "powershell"},
            headers=auth_headers,
        )
        session_id = create_resp.json()["id"]

        await client.post(
            f"/api/v1/scripts/builder/sessions/{session_id}/messages",
            json={"content": "List processes"},
            headers=auth_headers,
        )

        # Save to library
        resp = await client.post(
            f"/api/v1/scripts/builder/sessions/{session_id}/save",
            json={"name": "My Process Script", "share_with_team": False},
            headers=auth_headers,
        )
        assert resp.status_code == 201
        data = resp.json()
        assert data["name"] == "My Process Script"
        assert "ai-generated" in data["tags"]