import pytest
import sys
import os
from unittest.mock import MagicMock, patch

# Ensure project root is in path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

from app import build_agent_prompt, detect_language

def test_build_agent_prompt_structure():
    """Verifies that the agent prompt contains the Proactivity Patch rules."""
    user_msg = "What is my future?"
    user_lang = "English"
    context = "Source: doc.txt Content: Knowledge"
    
    prompt = build_agent_prompt(user_msg, user_lang, context)
    
    assert "ORACLE MANDATE" in prompt
    assert "DO NOT ASK FOR PERMISSION" in prompt
    assert user_lang in prompt
    assert "Knowledge" in prompt
    assert user_msg in prompt

@patch("app.get_llm")
def test_detect_language_logic(mock_get_llm):
    """Verifies that detect_language correctly parses model output."""
    # Mocking LLM and Processor
    mock_model = MagicMock()
    mock_processor = MagicMock()
    mock_get_llm.return_value = (mock_model, mock_processor)
    
    # Mock generation output
    mock_processor.batch_decode.return_value = [" German "]
    
    detected = detect_language("Hallo wie gehts")
    
    assert detected == "German"
    assert mock_processor.apply_chat_template.called

def test_spiritual_tool_mandate_in_german():
    """Ensures German instructions are respected in prompt synthesis."""
    prompt = build_agent_prompt("Hallo", "German")
    assert "The user speaks German" in prompt
    assert "Always reply to the user in German" in prompt