"""FluentGerman.ai — LLM service tests (mocked)."""

from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from app.services.instruction_service import get_system_prompt


@pytest.mark.asyncio
async def test_system_prompt_empty():
    """When no instructions exist, returns default prompt."""
    db = AsyncMock()
    # Mock two queries returning empty results
    mock_result = MagicMock()
    mock_result.scalars.return_value.all.return_value = []
    db.execute = AsyncMock(return_value=mock_result)

    prompt = await get_system_prompt(db, user_id=1)
    assert "German" in prompt
    assert "tutor" in prompt.lower()


@pytest.mark.asyncio
async def test_system_prompt_with_instructions():
    """System prompt includes global and personal instructions."""
    from app.models import Instruction, InstructionType

    global_inst = MagicMock()
    global_inst.title = "Method"
    global_inst.content = "Use immersive conversation"
    global_inst.type = InstructionType.GLOBAL

    personal_inst = MagicMock()
    personal_inst.title = "Focus"
    personal_inst.content = "Practice articles"
    personal_inst.type = InstructionType.PERSONAL

    db = AsyncMock()
    call_count = 0

    async def mock_execute(query):
        nonlocal call_count
        call_count += 1
        result = MagicMock()
        if call_count == 1:
            result.scalars.return_value.all.return_value = [global_inst]
        else:
            result.scalars.return_value.all.return_value = [personal_inst]
        return result

    db.execute = mock_execute

    prompt = await get_system_prompt(db, user_id=1)
    assert "TEACHING METHOD" in prompt
    assert "immersive conversation" in prompt
    assert "PERSONAL INSTRUCTIONS" in prompt
    assert "Practice articles" in prompt